| 1 | #!/opt/bin/perl |
1 | #!/opt/bin/perl |
| 2 | |
2 | |
| 3 | # this hack is not considered release ready in and way, shape, or form |
3 | # |
| 4 | # ./vt102 bash |
4 | # Copyright(C) 2014 Marc Alexander Lehmann <vt102@schmorp.de> |
| 5 | # ./vt102 telnet towel.blinkenlights.nl |
5 | # |
| 6 | # ./vt102 curl http://artscene.textfiles.com/vt100/trekvid.vt |
6 | # vt102 is free software; you can redistribute it and/or modify it under |
| 7 | # ./vt102 curl http://artscene.textfiles.com/vt100/surf.vt # in 3d! |
7 | # the terms of the GNU General Public License as published by the Free |
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8 | # Software Foundation; either version 3, or (at your option) any later |
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9 | # version. |
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10 | # |
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11 | # vt102 is distributed in the hope that it will be useful, but WITHOUT |
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12 | # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 | # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 | # for more details. |
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15 | # |
| 8 | |
16 | |
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17 | # If this file contains embedded ROMs, the above copyright notice does |
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18 | # not apply to them. |
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19 | |
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20 | use strict; |
| 9 | use common::sense; |
21 | #use common::sense; |
| 10 | |
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| 11 | $| = 1; |
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| 12 | |
22 | |
| 13 | my $VT102 = 1; |
23 | my $VT102 = 1; |
| 14 | my $AVO = $VT102 || 1; |
24 | my $VT131 = 0; |
| 15 | my $KBD = 1; |
25 | my $AVO = 1; |
| 16 | |
26 | |
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27 | shift, ($VT102 = 0), ($AVO = 0) if $ARGV[0] =~ /^-?-vt100$/; |
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28 | shift, ($VT102 = 0) if $ARGV[0] =~ /^-?-vt100\+avo$/; |
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29 | shift if $ARGV[0] =~ /^-?-vt102$/; |
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30 | shift, ($VT131 = 1) if $ARGV[0] =~ /^-?-vt131$/; |
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31 | |
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32 | # vt100 wps = word processing roms |
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33 | # vt101 = vt102 - avo, but custom rom? really? |
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34 | # vt103 = vt100 + tu58 tape drive |
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35 | # vt125 = vt100 + gpo graphics processor |
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36 | # vt132 = vt100 + avo, stp |
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37 | # vt180 = vt100 + z80 cp/m |
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38 | |
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39 | if ($ARGV[0] =~ /^-/) { |
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40 | die <<EOF; |
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41 | |
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42 | VT102, A VT100/102/131 SIMULATOR |
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43 | |
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44 | Usage: |
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45 | |
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46 | $0 [option] [program [args]] |
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47 | |
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48 | Examples: |
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49 | |
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50 | $0 bash |
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51 | $0 telnet towel.blinkenlights.nl |
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52 | $0 curl http://artscene.textfiles.com/vt100/trekvid.vt |
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53 | $0 curl http://artscene.textfiles.com/vt100/surf.vt # in 3d! |
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54 | |
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55 | Option can be one of: |
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56 | |
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57 | --vt100 |
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58 | --vt100+avo |
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59 | --vt102 |
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60 | --vt131 |
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61 | |
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62 | Non-obvious special keys are: |
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63 | |
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64 | SET UP Home |
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65 | BACKSPACE Rubout |
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66 | CAPS LOCK Prior/PgUp |
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67 | NO SCROLL Next/PgDown |
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68 | BREAK End |
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69 | |
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70 | Set-Up Guide: |
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71 | |
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72 | http://vt100.net/docs/vt102-ug/chapter3.html#S3.6 |
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73 | |
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74 | Author: |
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75 | |
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76 | Marc Lehmann <vt102\@schmorp.de> |
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77 | |
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78 | EOF |
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79 | } |
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80 | |
| 17 | ############################################################################# |
81 | ############################################################################# |
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82 | # ROM/hardware init |
| 18 | |
83 | |
| 19 | my $PTY; # the pty we allocated, if any |
84 | my $PTY; # the pty we allocated, if any |
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85 | my $KBD = 1; |
| 20 | |
86 | |
| 21 | my $ROM = do { |
87 | my $ROMS = do { |
| 22 | binmode DATA; |
88 | binmode DATA; |
| 23 | local $/; |
89 | local $/; |
| 24 | <DATA> |
90 | <DATA> |
| 25 | }; |
91 | }; |
| 26 | |
92 | |
| 27 | 0x6001 == length $ROM or die "corrupted rom image"; |
93 | 0x6801 == length $ROMS or die "corrupted rom image"; |
| 28 | |
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| 29 | binmode STDOUT; |
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| 30 | |
94 | |
| 31 | my @M = (0xff) x 65536; # main memory, = (0xff) x 65536; |
95 | my @M = (0xff) x 65536; # main memory, = (0xff) x 65536; |
| 32 | |
96 | |
| 33 | # populate mem with rom contents |
97 | # populate mem with rom contents |
| 34 | if ($VT102) { |
98 | if ($VT102) { |
| 35 | @M[0x0000 .. 0x1fff] = unpack "C*", substr $ROM, 0x2000, 0x2000; |
99 | @M[0x0000 .. 0x1fff] = unpack "C*", substr $ROMS, 0x2000, 0x2000; |
| 36 | @M[0x8000 .. 0x9fff] = unpack "C*", substr $ROM, 0x4000, 0x2000; |
100 | @M[0x8000 .. 0x9fff] = unpack "C*", substr $ROMS, 0x4000, 0x2000; |
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101 | @M[0xa000 .. 0xa7ff] = unpack "C*", substr $ROMS, 0x6000, 0x0800 if $VT131; |
| 37 | } else { |
102 | } else { |
| 38 | @M[0x0000 .. 0x1fff] = unpack "C*", substr $ROM, 0x0000, 0x2000; |
103 | @M[0x0000 .. 0x1fff] = unpack "C*", substr $ROMS, 0x0000, 0x2000; |
| 39 | } |
104 | } |
| 40 | |
105 | |
| 41 | ############################################################################# |
106 | ############################################################################# |
| 42 | |
107 | # 8085 CPU registers and I/O support |
| 43 | my $PRSTATUS = 0; |
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| 44 | |
108 | |
| 45 | # 8080/8085 registers |
109 | # 8080/8085 registers |
| 46 | # b, c, d, e, h, l, a |
110 | my ($A, $B, $C, $D, $E, $H, $L); # 8 bit general purpose |
| 47 | my ($A, $B, $C, $D, $E, $H, $L, $A); |
111 | my ($PC, $SP, $IFF); # program counter, stack pointer, interrupt flag |
| 48 | my ($PC, $SP, $IFF, $FA, $FZ, $FS, $FP, $FC); |
112 | my ($FA, $FZ, $FS, $FP, $FC); # condition codes (psw) |
| 49 | |
113 | |
| 50 | my $RST = 0; # 8080 pending interrupts |
114 | my $RST = 0; # pending interrupts (external interrupt logic) |
| 51 | my $INTMASK = 7; # 8085 half interrupts |
115 | my $INTMASK = 7; # 8085 half interrupt mask |
| 52 | my $INTPEND = 0; # 8085 half interrupts |
116 | my $INTPEND = 0; # 8085 half interrupts pending |
| 53 | |
117 | |
| 54 | my $x; # dummy temp for instructions |
118 | my $CLK; # rather inexact clock, counts extended basic blocks |
| 55 | |
119 | |
| 56 | my $CLK; # rather inexact clock |
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| 57 | |
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| 58 | ############################################################################# |
120 | ############################################################################# |
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121 | # the dreaded NVR1400 chip. not needed to get it going, but provided anyway |
| 59 | |
122 | |
| 60 | # nvram |
123 | # nvram |
| 61 | my @NVR = (0x3fff) x 100; # vt102: 214e accum, 214f only lower 8 bit used, first 44 bytes |
124 | my @NVR = (0x3fff) x 100; # vt102: 214e accum, 214f only lower 8 bit used, first 44 bytes |
| 62 | my $NVRADDR; |
125 | my $NVRADDR; |
| 63 | my $NVRDATA; |
126 | my $NVRDATA; |
| 64 | my $NVRLATCH; |
127 | my $NVRLATCH; |
| 65 | |
128 | |
| 66 | #$NVR[$_] = $_ for 0..99;#d# |
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| 67 | |
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| 68 | my @NVRCMD = ( |
129 | my @NVRCMD = ( |
| 69 | sub { # accept data |
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| 70 | $NVRDATA = ($NVRDATA << 1) + $_[1]; |
130 | sub { $NVRDATA = ($NVRDATA << 1) + $_[1]; }, # 0 accept data |
| 71 | }, |
131 | sub { $NVRADDR = ($NVRADDR << 1) + $_[1]; }, # 1 accept addr |
| 72 | sub { # accept addr |
132 | sub { ($NVRDATA <<= 1) & 0x4000 }, # 2 shift out |
| 73 | $NVRADDR = ($NVRADDR << 1)+ $_[1]; |
133 | undef, # 3 not used, will barf |
| 74 | }, |
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| 75 | sub { # shift out |
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| 76 | my $bit = $NVRDATA & 0x02000; |
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| 77 | $NVRDATA *= 2; |
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| 78 | $bit |
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| 79 | }, |
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| 80 | undef, |
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| 81 | sub { # write |
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| 82 | print "NVR WRITE $_[0]\n";#d# |
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| 83 | $NVR[$_[0]] = $NVRDATA & 0x3fff; |
134 | sub { $NVR[$_[0]] = $NVRDATA & 0x3fff; }, # 4 write |
| 84 | }, |
135 | sub { $NVR[$_[0]] = 0x3fff; }, # 5 erase |
| 85 | sub { # erase |
136 | sub { $NVRDATA = $NVR[$_[0]]; }, # 6 read |
| 86 | print "NVR ERASE $_[0]\n";#d# |
137 | sub { }, # 7 standby |
| 87 | $NVR[$_[0]] = 0x3fff; |
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| 88 | }, |
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| 89 | sub { # read |
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| 90 | # print "NVR READ $_[0] = $NVR[$_[0]]\n";#d# |
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| 91 | $NVRDATA = $NVR[$_[0]]; |
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| 92 | }, |
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| 93 | sub { # standby |
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| 94 | }, |
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| 95 | ); |
138 | ); |
| 96 | |
139 | |
| 97 | my @bitidx; |
140 | my @NVR_BITIDX; $NVR_BITIDX[1 << $_] = 9 - $_ for 0..9; |
| 98 | $bitidx[1 << $_] = 9 - $_ for 0..9; |
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| 99 | |
141 | |
| 100 | # the nvr1400 state machine. what a monster |
142 | # the nvr1400 state machine. what a monster |
| 101 | sub nvr() { |
143 | sub nvr() { |
| 102 | my $a1 = $bitidx[(~$NVRADDR ) & 0x3ff]; |
144 | my $a1 = $NVR_BITIDX[(~$NVRADDR ) & 0x3ff]; |
| 103 | my $a0 = $bitidx[(~$NVRADDR >> 10) & 0x3ff]; |
145 | my $a0 = $NVR_BITIDX[(~$NVRADDR >> 10) & 0x3ff]; |
| 104 | |
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| 105 | # printf "NVR %02x A %020b %d %d D %02x\n", $NVRLATCH, $NVRADDR & 0xfffff, $a1, $a0, $NVRDATA; |
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| 106 | |
146 | |
| 107 | $NVRCMD[($NVRLATCH >> 1) & 7]($a1 * 10 + $a0, $NVRLATCH & 1) |
147 | $NVRCMD[($NVRLATCH >> 1) & 7]($a1 * 10 + $a0, $NVRLATCH & 1) |
| 108 | } |
148 | } |
| 109 | |
149 | |
| 110 | ############################################################################# |
150 | ############################################################################# |
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151 | # I/O ports - output |
| 111 | |
152 | |
| 112 | my $DC11 = 0; # 4 bit commands |
153 | my $DC11_REVERSE = 0; # light background? |
| 113 | my $DC12 = 0; |
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| 114 | |
154 | |
| 115 | my $XON = 1; # false if terminal wants us to pause |
155 | my $XON = 1; # false if terminal wants us to pause |
| 116 | my $PUSARTCMD; |
156 | my $PUSARTCMD; |
| 117 | |
157 | |
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158 | my $KSTATUS; # keyboard status (click + scan flag + leds) |
| 118 | my @KXMIT; # current scan queue |
159 | my @KXMIT; # current scan queue |
| 119 | my %KXMIT; # currently pressed keys |
160 | my %KXMIT; # currently pressed keys |
| 120 | my @KQUEUE; # key event queue |
161 | my @KQUEUE; # key event queue |
| 121 | my $KXCNT; # count for debouncew |
162 | my $KXCNT; # count for debouncew |
| 122 | my @PUSARTRECV; |
163 | |
| 123 | my $KSTATUS; |
164 | my @PUSARTRECV; # serial input (to terminal) queue |
| 124 | |
165 | |
| 125 | sub out_00 { # pusartdata |
166 | sub out_00 { # pusartdata |
| 126 | # handle xon/xoff, but also pass it through |
167 | # handle xon/xoff, but also pass it through |
| 127 | if ($_[0] == 0x13) { |
168 | if ($_[0] == 0x13) { |
| 128 | $XON = 0; |
169 | $XON = 0; |
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170 | return;#d# |
| 129 | } elsif ($_[0] == 0x11) { |
171 | } elsif ($_[0] == 0x11) { |
| 130 | $XON = 1; |
172 | $XON = 1; |
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173 | return;#d# |
| 131 | } |
174 | } |
| 132 | |
175 | |
| 133 | syswrite $PTY, chr $_[0]; |
176 | syswrite $PTY, chr $_[0]; |
| 134 | |
177 | |
| 135 | $INTPEND |= 1; # 5.5 txrdy |
178 | $INTPEND |= 1; |
| 136 | } |
179 | } |
| 137 | |
180 | |
| 138 | sub out_01 { |
181 | sub out_01 { # pusartcmd |
| 139 | $PUSARTCMD = shift; |
182 | $PUSARTCMD = shift; |
| 140 | |
183 | |
| 141 | $INTPEND |= 1 if $PUSARTCMD & 0x01; # VT102, 5.5 txrdy |
184 | $INTPEND |= 1 if $PUSARTCMD & 0x01; # VT102, 5.5 txrdy |
| 142 | $INTPEND |= 2 if $PUSARTCMD & 0x04; # VT102, 6.5 rxrdy |
185 | $INTPEND |= 2 if $PUSARTCMD & 0x04 && !@PUSARTRECV; # VT102, 6.5 rxrdy, needed for some reason |
| 143 | } |
186 | } |
| 144 | |
187 | |
| 145 | sub out_02 { } # baudrate generator |
188 | sub out_02 { } # baudrate generator |
| 146 | |
189 | |
| 147 | sub out_23 { } # unknown |
190 | sub out_23 { } # vt102 unknown |
| 148 | sub out_27 { } # unknown |
191 | sub out_27 { } # vt102 unknown |
| 149 | sub out_2f { } # unknown, connected to in 0f |
192 | sub out_2f { } # vt102 unknown, connected to in 0f |
| 150 | |
193 | |
| 151 | sub out_42 { } # brightness |
194 | sub out_42 { } # brightness |
| 152 | |
195 | |
| 153 | sub out_62 { |
196 | sub out_62 { # nvr latch register (4 bits) |
| 154 | $NVRLATCH = shift; |
197 | $NVRLATCH = shift; |
| 155 | } |
198 | } |
| 156 | |
199 | |
| 157 | sub out_a2 { $DC11 = shift } |
200 | sub out_a2 { # device control 011 |
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201 | my $dc11 = 0x0f & shift; |
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202 | |
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203 | $DC11_REVERSE = 1 if $dc11 == 0b1010; |
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204 | $DC11_REVERSE = 0 if $dc11 == 0b1011; |
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205 | } |
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206 | |
| 158 | sub out_c2 { } # unknown |
207 | sub out_c2 { } # unknown |
| 159 | sub out_d2 { $DC12 = shift } |
208 | sub out_d2 { } # device control 012, 0..3 == 80c/132c/60hz/50hz |
| 160 | |
209 | |
| 161 | sub out_82 { |
210 | sub out_82 { # keyboard txmit |
| 162 | # keyboard |
211 | # CLICK STARTSCAN ONLINE LOCKED | L1 L2 L3 L4 (vt100) |
| 163 | |
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| 164 | # CLICK STARTSCAN ONLINE LOCKED | CTS DSR INSERT L1(?) |
212 | # CLICK STARTSCAN ONLINE LOCKED | CTS DSR INS L1 (vt102) |
| 165 | # CLICK STARTSCAN ONLINE LOCKED | LED1 LED2 LED3 LED4 |
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| 166 | $KSTATUS = $_[0]; |
213 | $KSTATUS = $_[0]; |
| 167 | |
214 | |
| 168 | # start new scan unless scan in progress |
215 | # start new scan unless scan is in progress |
| 169 | if (($_[0] & 0x40) && !@KXMIT) { |
216 | if (($_[0] & 0x40) && !@KXMIT) { |
| 170 | # do not reply with keys in locked mode |
217 | # do not reply with keys in locked mode |
| 171 | # or during post (0xff), |
218 | # or during post (0xff), |
| 172 | # mostly to skip init and not fail POST, |
219 | # mostly to skip init and not fail POST, |
| 173 | # and to send startup keys only when terminal is ready |
220 | # and to send startup keys only when terminal is ready |
| … | |
… | |
| 193 | $RST |= 1; |
240 | $RST |= 1; |
| 194 | } |
241 | } |
| 195 | } |
242 | } |
| 196 | |
243 | |
| 197 | ############################################################################# |
244 | ############################################################################# |
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245 | # I/O ports - input |
| 198 | |
246 | |
| 199 | my $NVRBIT; |
247 | my $NVRBIT; # the current nvr data bit |
| 200 | my $LBA; |
248 | my $LBA6; # twice the frequenxy of LBA7 |
| 201 | |
249 | |
| 202 | sub in_00 { # pusart data |
250 | sub in_00 { # pusart data |
| 203 | # print "READ PUSARTDATA (@PUSARTRECV)\n"; |
251 | # interrupt not generated here, because infinite |
| 204 | |
252 | # speed does not go well with the vt102. |
| 205 | # $RST |= 2 if $#PUSARTRECV && $XON; |
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| 206 | # $INTPEND |= 2 if $#PUSARTRECV && $XON; |
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| 207 | |
253 | |
| 208 | shift @PUSARTRECV |
254 | shift @PUSARTRECV |
| 209 | } |
255 | } |
| 210 | |
256 | |
| 211 | sub in_01 { # pusart status |
257 | sub in_01 { # pusart status |
| 212 | # DSR SYNDET FE OE | PE TXEMPTY RXRDY TXRDY |
258 | # DSR SYNDET FE OE | PE TXEMPTY RXRDY TXRDY |
| 213 | 0x85 + (@PUSARTRECV && 0x02) |
259 | 0x85 + (@PUSARTRECV && 0x02) |
| 214 | } |
260 | } |
| 215 | |
261 | |
| 216 | sub in_22 { # modem buffer(?) |
262 | sub in_22 { # modem buffer |
| 217 | # wild guess: -CTS -SPDI -RI -CD 0 0 0 0 |
263 | # wild guess: -CTS -SPDI -RI -CD 0 0 0 0 |
| 218 | 0x20 |
264 | 0x20 |
| 219 | } |
265 | } |
| 220 | |
266 | |
| 221 | sub in_0f { } # unknown, connected to out 2f |
267 | sub in_0f { 0xff } # vt102 unknown, connected to out 2f |
| 222 | |
268 | |
| 223 | sub in_42 { # flag buffer |
269 | sub in_42 { # flag buffer |
| 224 | ++$LBA; |
270 | ++$LBA6; |
| 225 | # ++$LBA; |
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| 226 | # printf "%04x lba %04x, %04x\n", $PC, $LBA, $CLK; |
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| 227 | |
271 | |
| 228 | $NVRBIT = nvr ? 0x20 : 0x00 if ($LBA & 0x3) == 0x2; |
272 | $NVRBIT = nvr ? 0x20 : 0x00 if ($LBA6 & 0x3) == 0x2; |
| 229 | |
273 | |
| 230 | # KBD_XMITEMPTY LBA7 NVRDATA ODDFIELD - OPTION !GFX !AVO PUSART_TXRDY |
274 | # KBD_XMITEMPTY LBA7 NVRDATA ODDFIELD - OPTION !GFX !AVO PUSART_TXRDY |
| 231 | |
275 | |
| 232 | my $f = 0x85 | $NVRBIT; |
276 | my $f = 0x85 | $NVRBIT; |
| 233 | |
277 | |
| 234 | $f |= 0x02 unless $AVO; |
278 | $f |= 0x02 unless $AVO; |
| 235 | $f |= 0x40 if $LBA & 0x2; |
279 | $f |= 0x40 if $LBA6 & 0x2; |
| 236 | |
280 | |
| 237 | $f |
281 | $f |
| 238 | } |
282 | } |
| 239 | |
283 | |
| 240 | sub in_82 { # tbmt keyboard uart |
284 | sub in_82 { # tbmt keyboard uart |
| … | |
… | |
| 242 | |
286 | |
| 243 | $RST |= 1; |
287 | $RST |= 1; |
| 244 | shift @KXMIT |
288 | shift @KXMIT |
| 245 | } |
289 | } |
| 246 | |
290 | |
| 247 | sub in_03 { 0xff } # unknown, printer uart input? |
291 | sub in_03 { 0xff } # vt102 unknown, printer uart input? |
| 248 | sub in_0b { 0xff } # unknown |
292 | sub in_0b { 0xff } # vt102 unknown |
| 249 | sub in_17 { 0xff } # unknown, printer status clear by reading? |
293 | sub in_17 { 0xff } # vt102 unknown, printer status clear by reading? |
| 250 | sub in_1b { 0xff } # unknown |
294 | sub in_1b { 0xff } # vt102 unknown |
| 251 | |
295 | |
| 252 | ############################################################################# |
296 | ############################################################################# |
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297 | # 8085 cpu opcodes and flag handling |
| 253 | |
298 | |
| 254 | sub sf { |
299 | my $x; # dummy scratchpad for opcodes |
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300 | |
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301 | sub sf { # set flags, full version (ZSC - AP not implemented) |
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302 | $FS = $_[0] & 0x080; |
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303 | $FZ = !($_[0] & 0x0ff); |
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304 | $FC = $_[0] & 0x100; |
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305 | |
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306 | $_[0] &= 0xff; |
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307 | } |
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308 | |
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309 | sub sf8 { # set flags, for 8-bit results (ZSC - AP not implemented) |
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310 | $FS = $_[0] & 0x080; |
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311 | $FZ = !($_[0] & 0x0ff); |
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312 | $FC = 0; |
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313 | } |
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314 | |
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315 | sub sf_nc { # set flags, except carry |
| 255 | $FS = $_[0] & 0x080; |
316 | $FS = $_[0] & 0x080; |
| 256 | $FZ = ($_[0] & 0x0ff) == 0; |
317 | $FZ = ($_[0] & 0x0ff) == 0; |
| 257 | $FC = $_[0] & 0x100; |
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| 258 | |
318 | |
| 259 | $_[0] & 0xff |
319 | $_[0] &= 0xff; |
| 260 | } |
320 | } |
| 261 | |
321 | |
| 262 | sub sf_nc { |
322 | # opcode table |
| 263 | $FS = $_[0] & 0x080; |
|
|
| 264 | $FZ = ($_[0] & 0x0ff) == 0; |
|
|
| 265 | |
|
|
| 266 | $_[0] & 0xff |
|
|
| 267 | } |
|
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| 268 | |
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|
| 269 | my @op = map { sprintf "status(); die 'unknown op %02x'", $_ } 0 .. 255; |
323 | my @op = map { sprintf "status(); die 'unknown op %02x'", $_ } 0x00 .. 0xff; |
| 270 | my @ops; |
|
|
| 271 | |
324 | |
| 272 | my @reg = qw($B $C $D $E $H $L $M[$H*256+$L] $A); |
325 | my @reg = qw($B $C $D $E $H $L $M[$H*256+$L] $A); # r/m encoding |
| 273 | my @cc = ('if !$FZ', 'if $FZ', 'if !$FC', 'if $FC', ';die', ';die', 'if !$FS', 'if $FS'); # die == unimplemented $FP parity |
326 | my @cc = ('!$FZ', '$FZ', '!$FC', '$FC', 'die;', 'die;', '!$FS', '$FS'); # cc encoding. die == unimplemented $FP parity |
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327 | |
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|
328 | $op[0x00] = ''; # nop |
| 274 | |
329 | |
| 275 | # mov r,r / r,M / M,r |
330 | # mov r,r / r,M / M,r |
| 276 | for my $s (0..7) { |
331 | for my $s (0..7) { |
| 277 | for my $d (0..7) { |
332 | for my $d (0..7) { |
| 278 | $op[0x40 + $d * 8 + $s] = "$reg[$d] = $reg[$s]"; |
333 | $op[0x40 + $d * 8 + $s] = "$reg[$d] = $reg[$s]"; # mov |
| 279 | } |
334 | } |
| 280 | } |
335 | } |
| 281 | |
336 | |
| 282 | $op[0x00] = ''; |
337 | $op[0x76] = 'die "HLT"'; # hlt (mov m,m) |
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|
338 | |
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|
339 | # mvi r / M |
|
|
340 | $op[0x06 + $_ * 8] = "$reg[$_] = IMM8" for 0..7; |
| 283 | |
341 | |
| 284 | $op[0x01] = '($B, $C) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi |
342 | $op[0x01] = '($B, $C) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi |
| 285 | $op[0x11] = '($D, $E) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi |
343 | $op[0x11] = '($D, $E) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi |
| 286 | $op[0x21] = '($H, $L) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi |
344 | $op[0x21] = '($H, $L) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi |
| 287 | $op[0x31] = '$SP = IMM16' ; # lxi #d# 0xf000 because of limited stack |
345 | $op[0x31] = '$SP = IMM16' ; # lxi |
| 288 | |
346 | |
| 289 | $op[0x02] = '$M[$B * 256 + $C] = $A'; # stax |
347 | $op[0x02] = '$M[$B * 256 + $C] = $A'; # stax |
| 290 | $op[0x12] = '$M[$D * 256 + $E] = $A'; # stax |
348 | $op[0x12] = '$M[$D * 256 + $E] = $A'; # stax |
| 291 | $op[0x32] = '$M[IMM16 ] = $A'; # sta |
349 | $op[0x32] = '$M[IMM16 ] = $A'; # sta |
| 292 | |
350 | |
|
|
351 | $op[0x0a] = '$A = $M[$B * 256 + $C]'; # ldax b |
|
|
352 | $op[0x1a] = '$A = $M[$D * 256 + $E]'; # ldax d |
|
|
353 | $op[0x3a] = '$A = $M[IMM16]'; # lda |
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354 | |
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355 | $op[0x22] = '($M[IMM16], $M[IMM16 + 1]) = ($L, $H)'; # shld |
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356 | $op[0x2a] = '($L, $H) = ($M[IMM16], $M[IMM16 + 1])'; # lhld |
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357 | |
| 293 | sub inxdcx($$$) { |
358 | sub inxdcx($$$) { |
| 294 | $x = ($_[0] * 256 + $_[1] + $_[2]) & 0xffff; |
359 | $x = $_[0] * 256 + $_[1] + $_[2]; |
| 295 | $_[0] = $x >> 8; |
360 | ($_[0], $_[1]) = (($x >> 8) & 0xff, $x & 0xff); |
| 296 | $_[1] = $x & 0xff; |
|
|
| 297 | } |
361 | } |
| 298 | |
362 | |
| 299 | $op[0x03] = 'inxdcx $B, $C, 1'; # inx |
363 | $op[0x03] = 'inxdcx $B, $C, 1'; # inx |
| 300 | $op[0x13] = 'inxdcx $D, $E, 1'; # inx |
364 | $op[0x13] = 'inxdcx $D, $E, 1'; # inx |
| 301 | $op[0x23] = 'inxdcx $H, $L, 1'; # inx |
365 | $op[0x23] = 'inxdcx $H, $L, 1'; # inx |
| … | |
… | |
| 304 | $op[0x1b] = 'inxdcx $D, $E, -1'; # dcx |
368 | $op[0x1b] = 'inxdcx $D, $E, -1'; # dcx |
| 305 | $op[0x2b] = 'inxdcx $H, $L, -1'; # dcx |
369 | $op[0x2b] = 'inxdcx $H, $L, -1'; # dcx |
| 306 | $op[0x3b] = '--$SP' ; # dcx |
370 | $op[0x3b] = '--$SP' ; # dcx |
| 307 | |
371 | |
| 308 | # "no carry" doesn't seem to be needed for vt100 - optimize? |
372 | # "no carry" doesn't seem to be needed for vt100 - optimize? |
| 309 | $op[0x04 + $_ * 8] = "$reg[$_] = sf_nc $reg[$_] + 1" for 0..7; # inr |
|
|
| 310 | $op[0x05 + $_ * 8] = "$reg[$_] = sf_nc $reg[$_] - 1" for 0..7; # dcr |
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| 311 | |
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|
| 312 | # mvi r / M |
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|
| 313 | $op[0x06 + $_ * 8] = "$reg[$_] = IMM8" for 0..7; |
373 | $op[0x04 + $_ * 8] = "sf_nc ++$reg[$_]" for 0..7; # inr |
|
|
374 | $op[0x05 + $_ * 8] = "sf_nc --$reg[$_]" for 0..7; # dcr |
|
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375 | |
|
|
376 | $op[0x07] = ' $FC = $A & 0x80; $A = (($A << 1) + ($FC && 0x01)) & 0xff '; # rlc |
|
|
377 | $op[0x17] = ' ($FC, $A) = ($A & 0x80, (($A << 1) + ($FC && 0x01)) & 0xff)'; # ral |
|
|
378 | $op[0x0f] = ' $FC = $A & 0x01; $A = ($A >> 1) | ($FC && 0x80) '; # rrc |
|
|
379 | $op[0x1f] = ' ($FC, $A) = ($A & 0x01, ($A >> 1) | ($FC && 0x80))'; # rar |
| 314 | |
380 | |
| 315 | # getting this insn wrong (its the only 16 bit insn to modify flags) |
381 | # getting this insn wrong (its the only 16 bit insn to modify flags) |
| 316 | # wasted three of my best days with mindless vt102 rom reverse engineering |
382 | # wasted three of my best days with mindless vt102 rom reverse engineering |
| 317 | sub dad { |
383 | sub dad { |
| 318 | $x = $H * 256 + $L + $_[0]; |
384 | $x = $H * 256 + $L + $_[0]; |
| … | |
… | |
| 324 | $op[0x09] = 'dad $B * 256 + $C'; # dad |
390 | $op[0x09] = 'dad $B * 256 + $C'; # dad |
| 325 | $op[0x19] = 'dad $D * 256 + $E'; # dad |
391 | $op[0x19] = 'dad $D * 256 + $E'; # dad |
| 326 | $op[0x29] = 'dad $H * 256 + $L'; # dad |
392 | $op[0x29] = 'dad $H * 256 + $L'; # dad |
| 327 | $op[0x39] = 'dad $SP '; # dad |
393 | $op[0x39] = 'dad $SP '; # dad |
| 328 | |
394 | |
| 329 | $op[0x07] = ' $FC = $A >> 7; $A = ($A * 2 + $FC) & 0xff '; # rlc |
395 | $op[0x2f] = '$A ^= 0xff'; # cma |
| 330 | $op[0x17] = ' ($FC, $A) = ($A >> 7, ($A * 2 + $FC) & 0xff)'; # ral |
|
|
| 331 | |
396 | |
| 332 | $op[0x0f] = ' $FC = $A & 1; $A = ($A >> 1) | ($FC && 0x80) '; # rrc |
397 | $op[0x80 + $_] = 'sf $A += + ' . $reg[$_] for 0..7; # add |
| 333 | $op[0x1f] = ' ($FC, $A) = ($A & 1, ($A >> 1) | ($FC && 0x80))'; # rar |
398 | $op[0x88 + $_] = 'sf $A += ($FC && 1) + ' . $reg[$_] for 0..7; # adc |
|
|
399 | $op[0x90 + $_] = 'sf $A -= + ' . $reg[$_] for 0..7; # sub |
|
|
400 | $op[0x98 + $_] = 'sf $A -= ($FC && 1) + ' . $reg[$_] for 0..7; # sbb |
|
|
401 | $op[0xa0 + $_] = 'sf8 $A &= ' . $reg[$_] for 0..7; # ana |
|
|
402 | $op[0xa8 + $_] = 'sf8 $A ^= ' . $reg[$_] for 0..7; # xra |
|
|
403 | $op[0xb0 + $_] = 'sf8 $A |= ' . $reg[$_] for 0..7; # ora |
|
|
404 | $op[0xb8 + $_] = 'sf $x = $A - ' . $reg[$_] for 0..7; # cmp |
|
|
405 | # possible todo: optimize ora a, maybe xra a, possibly ana |
| 334 | |
406 | |
| 335 | $op[0x0a] = '$A = $M[$B * 256 + $C]'; # ldax b |
407 | $op[0xc6] = 'sf $A += IMM8'; # adi |
| 336 | $op[0x1a] = '$A = $M[$D * 256 + $E]'; # ldax d |
408 | $op[0xd6] = 'sf $A -= IMM8'; # sui |
| 337 | $op[0x3a] = '$A = $M[IMM16]'; # lda |
409 | $op[0xe6] = 'sf8 $A &= IMM8'; # ani |
|
|
410 | $op[0xee] = 'sf8 $A ^= IMM8'; # xri |
|
|
411 | $op[0xf6] = 'sf8 $A |= IMM8'; # ori |
|
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412 | $op[0xfe] = 'sf $A - IMM8'; # cpi |
|
|
413 | # ce ACI NYI, apparently unused |
|
|
414 | # de SBI NYI, apparently unused |
| 338 | |
415 | |
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416 | $op[0xc5] = 'PUSH $B; PUSH $C'; |
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417 | $op[0xd5] = 'PUSH $D; PUSH $E'; |
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418 | $op[0xe5] = 'PUSH $H; PUSH $L'; |
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419 | $op[0xf5] = 'PUSH $A; PUSH +($FS && 0x80) | ($FZ && 0x40) | ($FA && 0x10) | ($FP && 0x04) | ($FC && 0x01)'; # psw |
|
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420 | |
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|
421 | $op[0xc1] = '($C, $B) = (POP, POP)'; # pop |
|
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422 | $op[0xd1] = '($E, $D) = (POP, POP)'; # pop |
|
|
423 | $op[0xe1] = '($L, $H) = (POP, POP)'; # pop |
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|
424 | $op[0xf1] = '($x, $A) = (POP, POP); ($FS, $FZ, $FA, $FP, $FC) = ($x & 0x80, $x & 0x40, $x & 0x10, $x & 0x04, $x & 0x01)'; # pop psw |
|
|
425 | |
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|
426 | $op[0xc2 + $_ * 8] = 'BRA IMM16 if ' . $cc[$_] for 0..7; # jcc |
|
|
427 | $op[0xc3] = 'JMP IMM16'; # jmp |
|
|
428 | |
|
|
429 | $op[0xc4 + $_ * 8] = '(PUSH PC >> 8), (PUSH PC & 0xff), (BRA IMM16) if ' . $cc[$_] for 0..7; # ccc |
|
|
430 | $op[0xcd] = '(PUSH PC >> 8), (PUSH PC & 0xff), (BRA IMM16)'; # call |
|
|
431 | |
|
|
432 | $op[0xc0 + $_ * 8] = 'BRA POP + POP * 256 if ' . $cc[$_] for 0..7; # rcc |
|
|
433 | $op[0xc9] = 'JMP POP + POP * 256'; # ret |
|
|
434 | |
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|
435 | $op[0xc7 + $_ * 8] = "JMP $_ * 8" for 0..7; # rst |
|
|
436 | |
|
|
437 | $op[0xe9] = 'JMP $H * 256 + $L'; # pchl |
|
|
438 | # f9 SPHL NYI, apparently unused |
|
|
439 | |
|
|
440 | $op[0x37] = '$FC = 1 '; # stc |
|
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441 | $op[0x3f] = '$FC = !$FC'; # cmc |
|
|
442 | |
|
|
443 | $op[0xd3] = 'OUT'; # out |
|
|
444 | $op[0xdb] = 'IN'; # in |
|
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445 | |
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|
446 | $op[0xeb] = '($D, $E, $H, $L) = ($H, $L, $D, $E)'; # xchg |
|
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447 | |
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|
448 | # e3 xthl NYI # @ 917b in e69, hl <-> (sp) |
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449 | |
| 339 | $op[0x20] = '$A = $INTPEND * 16 + $INTMASK + ($IFF && 8)'; # rim (incomplete) |
450 | $op[0x20] = '$A = $INTPEND * 16 + $INTMASK + ($IFF && 8)'; # rim (8085, incomplete) |
| 340 | $op[0x30] = '$INTMASK = $A & 7 if $A & 8'; # sim (incomplete) |
451 | $op[0x30] = '$INTMASK = $A & 7 if $A & 8'; # sim (8085, incomplete) |
| 341 | |
452 | |
| 342 | $op[0x22] = '($M[IMM16], $M[IMM16 + 1]) = ($L, $H)'; # shld |
453 | $op[0xf3] = '$IFF = 0'; # di |
| 343 | $op[0x2a] = '($L, $H) = ($M[IMM16], $M[IMM16 + 1])'; # lhld |
454 | $op[0xfb] = '$IFF = 1'; # ei |
| 344 | |
455 | |
| 345 | # yeah, the fucking setup screens actually use daa... |
456 | # yeah, the fucking setup screen actually uses daa... |
| 346 | $op[0x27] = ' |
457 | $op[0x27] = ' |
| 347 | my ($h, $l); |
458 | my ($h, $l); |
| 348 | |
459 | |
| 349 | ($h, $l) = ($A >> 4, $A & 15); |
460 | ($h, $l) = ($A >> 4, $A & 15); |
| 350 | |
461 | |
| 351 | if ($l > 9 || $FA) { |
462 | if ($l > 9 || $FA) { |
| 352 | $A = sf $A + 6; |
463 | sf $A += 6; |
| 353 | ($h, $l) = ($A >> 4, $A & 15); |
464 | ($h, $l) = ($A >> 4, $A & 15); |
| 354 | } |
465 | } |
| 355 | |
466 | |
| 356 | if ($h > 9 || $FC) { |
467 | if ($h > 9 || $FC) { |
| 357 | $h += 6; |
468 | $h += 6; |
| 358 | $A = ($h * 16 + $l) & 0xff; |
469 | $A = ($h * 16 + $l) & 0xff; |
| 359 | } |
470 | } |
| 360 | '; # daa, almost certainly borked, also, acarry not set by sf |
471 | '; # daa, almost certainly borked, also, acarry not set by sf |
| 361 | |
472 | |
| 362 | $op[0x2f] = '$A ^= 0xff'; # cma |
|
|
| 363 | |
|
|
| 364 | $op[0x37] = '$FC = 1 '; # stc |
|
|
| 365 | $op[0x3f] = '$FC = !$FC'; # cmc |
|
|
| 366 | |
|
|
| 367 | $op[0x76] = 'die "HLT"'; # hlt |
|
|
| 368 | |
|
|
| 369 | $op[0x80 + $_] = '$A = sf $A + ' . $reg[$_] for 0..7; # add |
|
|
| 370 | $op[0x88 + $_] = '$A = sf $A + $FC + ' . $reg[$_] for 0..7; # adc |
|
|
| 371 | $op[0x90 + $_] = '$A = sf $A - ' . $reg[$_] for 0..7; # sub |
|
|
| 372 | $op[0x98 + $_] = '$A = sf $A - $FC - ' . $reg[$_] for 0..7; # sbb |
|
|
| 373 | $op[0xa0 + $_] = '$A = sf $A & ' . $reg[$_] for 0..7; # ana |
|
|
| 374 | $op[0xa8 + $_] = '$A = sf $A ^ ' . $reg[$_] for 0..7; # xra |
|
|
| 375 | $op[0xb0 + $_] = '$A = sf $A | ' . $reg[$_] for 0..7; # ora |
|
|
| 376 | $op[0xb8 + $_] = ' sf $A - ' . $reg[$_] for 0..7; # cmp |
|
|
| 377 | # possible todo: optimize ora a, maybe xra a |
|
|
| 378 | |
|
|
| 379 | $op[0xc6 + $_] = '$A = sf $A + IMM8'; # adi |
|
|
| 380 | $op[0xd6 + $_] = '$A = sf $A - IMM8'; # sui |
|
|
| 381 | $op[0xe6 + $_] = '$A = sf $A & IMM8'; # ani |
|
|
| 382 | $op[0xee + $_] = '$A = sf $A ^ IMM8'; # xri |
|
|
| 383 | $op[0xf6 + $_] = '$A = sf $A | IMM8'; # ori |
|
|
| 384 | $op[0xfe + $_] = ' sf $A - IMM8'; # cpi |
|
|
| 385 | |
|
|
| 386 | $op[0xc1] = '($C, $B) = (POP, POP)'; # pop |
|
|
| 387 | $op[0xd1] = '($E, $D) = (POP, POP)'; # pop |
|
|
| 388 | $op[0xe1] = '($L, $H) = (POP, POP)'; # pop |
|
|
| 389 | $op[0xf1] = '($x, $A) = (POP, POP); ($FS, $FZ, $FA, $FP, $FC) = (!!($x & 0x80), !!($x & 0x40), !!($x & 0x10), !!($x & 0x04), !!($x & 0x01))'; # pop psw |
|
|
| 390 | |
|
|
| 391 | $op[0xeb] = '($D, $E, $H, $L) = ($H, $L, $D, $E)'; # xchg |
|
|
| 392 | |
|
|
| 393 | $op[0xc2 + $_ * 8] = 'BRA IMM16 ' . $cc[$_] for 0..7; # jcc |
|
|
| 394 | $op[0xc3] = 'JMP IMM16'; # jmp |
|
|
| 395 | |
|
|
| 396 | $op[0xc4 + $_ * 8] = '(PUSH PC >> 8), (PUSH PC & 0xff), (BRA IMM16) ' . $cc[$_] for 0..7; # ccc |
|
|
| 397 | $op[0xcd] = '(PUSH PC >> 8), (PUSH PC & 0xff), (BRA IMM16)'; # call |
|
|
| 398 | |
|
|
| 399 | $op[0xc7 + $_ * 8] = "JMP $_ * 8" for 0..7; # rst |
|
|
| 400 | |
|
|
| 401 | $op[0xc0 + $_ * 8] = 'BRA POP + POP * 256 ' . $cc[$_] for 0..7; # rcc |
|
|
| 402 | $op[0xc9] = 'JMP POP + POP * 256'; # ret |
|
|
| 403 | |
|
|
| 404 | $op[0xc5] = 'PUSH $B; PUSH $C'; |
|
|
| 405 | $op[0xd5] = 'PUSH $D; PUSH $E'; |
|
|
| 406 | $op[0xe5] = 'PUSH $H; PUSH $L'; |
|
|
| 407 | $op[0xf5] = 'PUSH $A; PUSH +($FS && 0x80) | ($FZ && 0x40) | ($FA && 0x10) | ($FP && 0x04) | ($FC && 0x01)'; # psw |
|
|
| 408 | |
|
|
| 409 | $op[0xd3] = 'OUT'; # out |
|
|
| 410 | $op[0xdb] = 'IN'; # in |
|
|
| 411 | |
|
|
| 412 | # e3 xthl @ 917b, hl <-> (sp) |
|
|
| 413 | |
|
|
| 414 | $op[0xe9] = 'JMP $H * 256 + $L'; # pchl |
|
|
| 415 | |
|
|
| 416 | $op[0xf3] = '$IFF = 0'; # DI |
|
|
| 417 | $op[0xfb] = '$IFF = 1'; # EI |
|
|
| 418 | |
|
|
| 419 | @ops = @op; # for debugging #d# |
|
|
| 420 | |
|
|
| 421 | ############################################################################# |
473 | ############################################################################# |
|
|
474 | # debug |
| 422 | |
475 | |
| 423 | # print cpu status, for debugging |
476 | # print cpu status, for debugging |
| 424 | sub status { |
477 | sub status { |
| 425 | my $PC = shift || $PC; |
478 | my $PC = shift || $PC; |
| 426 | |
479 | |
| … | |
… | |
| 430 | ($FZ ? "1" : "0") |
483 | ($FZ ? "1" : "0") |
| 431 | . ($FS ? "1" : "0") |
484 | . ($FS ? "1" : "0") |
| 432 | . ($FC ? "1" : "0") |
485 | . ($FC ? "1" : "0") |
| 433 | . ($FA ? "1" : "0") |
486 | . ($FA ? "1" : "0") |
| 434 | . ($FP ? "1" : "0"), |
487 | . ($FP ? "1" : "0"), |
| 435 | $M[$PC], $ops[$M[$PC]]; |
488 | $M[$PC], $op[$M[$PC]]; |
| 436 | } |
489 | } |
| 437 | |
490 | |
| 438 | ############################################################################# |
491 | ############################################################################# |
|
|
492 | # video emulation |
| 439 | |
493 | |
| 440 | my @chr = ( |
494 | binmode STDOUT; |
| 441 | " ", |
495 | |
| 442 | "\x{29eb}", |
496 | my @CHARMAP = ( # acschars / chars 0..31 |
| 443 | "\x{2592}", |
497 | " " , "\x{29eb}", "\x{2592}", "\x{2409}", |
| 444 | "\x{2409}", |
498 | "\x{240c}", "\x{240d}", "\x{240a}", "\x{00b0}", |
| 445 | "\x{240c}", |
499 | "\x{00b1}", "\x{2424}", "\x{240b}", "\x{2518}", |
| 446 | "\x{240d}", |
500 | "\x{2510}", "\x{250c}", "\x{2514}", "\x{253c}", |
| 447 | "\x{240a}", |
501 | "\x{23ba}", "\x{23bb}", "\x{2500}", "\x{23bc}", |
| 448 | "\x{00b0}", |
502 | "\x{23bd}", "\x{251c}", "\x{2524}", "\x{2534}", |
| 449 | "\x{00b1}", |
503 | "\x{252c}", "\x{2502}", "\x{2264}", "\x{2265}", |
| 450 | "\x{2424}", |
504 | "\x{03c0}", "\x{2260}", "\x{00a3}", "\x{00b7}", |
| 451 | "\x{240b}", |
|
|
| 452 | "\x{2518}", |
|
|
| 453 | "\x{2510}", |
|
|
| 454 | "\x{250c}", |
|
|
| 455 | "\x{2514}", |
|
|
| 456 | "\x{253c}", |
|
|
| 457 | "\x{23ba}", |
|
|
| 458 | "\x{23bb}", |
|
|
| 459 | "\x{2500}", |
|
|
| 460 | "\x{23bc}", |
|
|
| 461 | "\x{23bd}", |
|
|
| 462 | "\x{251c}", |
|
|
| 463 | "\x{2524}", |
|
|
| 464 | "\x{2534}", |
|
|
| 465 | "\x{252c}", |
|
|
| 466 | "\x{2502}", |
|
|
| 467 | "\x{2264}", |
|
|
| 468 | "\x{2265}", |
|
|
| 469 | "\x{03c0}", |
|
|
| 470 | "\x{2260}", |
|
|
| 471 | "\x{0142}", |
|
|
| 472 | "\x{00b7}", |
|
|
| 473 | (map chr, 0x020 .. 0x7e), |
505 | (map chr, 0x020 .. 0x7e), |
| 474 | "?", |
|
|
| 475 | ); |
506 | ); |
| 476 | |
507 | |
| 477 | utf8::encode $_ for @chr; |
508 | utf8::encode $_ for @CHARMAP; |
| 478 | |
509 | |
| 479 | sub prscr { |
510 | my @SGR; # sgr sequences for attributes |
|
|
511 | |
|
|
512 | for (0x00 .. 0xff) { |
|
|
513 | my $sgr = ""; |
|
|
514 | |
|
|
515 | # ~1 sgr 5 blink |
|
|
516 | # ~2 sgr 4 underline |
|
|
517 | # ~4 sgr 1 bold |
|
|
518 | # 0x80 in attr, sgr 7, reversed |
|
|
519 | |
|
|
520 | $sgr .= ";5" unless $_ & 0x01; |
|
|
521 | $sgr .= ";4" unless $_ & 0x02; |
|
|
522 | $sgr .= ";1" unless $_ & 0x04; |
|
|
523 | $sgr .= ";7" if $_ & 0x80; |
|
|
524 | |
|
|
525 | $SGR[$_] = "\e[${sgr}m"; |
|
|
526 | } |
|
|
527 | |
|
|
528 | my @LED = $VT102 |
|
|
529 | ? qw(L1 INSERT DSR CTS LOCKED LOCAL SCAN BEEP) |
|
|
530 | : qw(L4 L3 L2 L1 LOCKED LOCAL SCAN BEEP); |
|
|
531 | |
|
|
532 | # display screen |
|
|
533 | sub display { |
| 480 | my $i = 0x2000; |
534 | my $i = 0x2000; |
| 481 | |
535 | |
| 482 | my $scr = sprintf "\x1b[H--- KBD %08b CLK %d PC %04x RST %03b IFF %01b PUS %02x IM %03b\x1b[K\n", $KSTATUS, $CLK, $PC, $RST, $IFF, $PUSARTCMD, $INTMASK; |
536 | my $leds = join " ", map $KSTATUS & 2**$_ ? "\e[7m$LED[$_]\e[m" : "$LED[$_]", reverse 0 .. $#LED; |
| 483 | |
537 | |
|
|
538 | my $scr = sprintf "\e[H--- LED [ %s ] CLK %d\e[K\n", $leds, $CLK; |
|
|
539 | |
|
|
540 | $scr .= "\e[?5" . ($DC11_REVERSE ? "h" : "l"); |
|
|
541 | |
| 484 | line: |
542 | line: |
| 485 | for my $y (0 .. 25) { |
543 | for my $y (0 .. 25) { # ntsc, two vblank delay lines, up to 24 text lines |
|
|
544 | my $prev_sgr; |
|
|
545 | |
| 486 | $scr .= sprintf "%2d |", ++$y; |
546 | $scr .= sprintf "%2d \xe2\x94\x82", $y; |
| 487 | |
547 | |
| 488 | for (0..140) { |
548 | for (0..139) { |
| 489 | my $c = $M[$i++]; |
549 | my $c = $M[$i]; |
| 490 | |
|
|
| 491 | # printf "%04x %02x\n", $i-1,$c; |
|
|
| 492 | |
550 | |
| 493 | if ($c == 0x7f) { # also 0xff, but the firmware avoids that |
551 | if ($c == 0x7f) { # also 0xff, but the firmware avoids that |
| 494 | $scr .= "|\x1b[K\n"; |
552 | $scr .= "\e[m\xe2\x94\x82\e[K\n"; |
| 495 | |
553 | |
| 496 | my $a1 = $M[$i++]; |
554 | my $a1 = $M[$i + 1]; |
| 497 | my $a0 = $M[$i++]; |
555 | my $a0 = $M[$i + 2]; |
| 498 | |
556 | |
| 499 | $i = 0x2000 + (($a1 * 256 + $a0) & 0xfff); |
557 | $i = 0x2000 + (($a1 * 256 + $a0) & 0xfff); |
| 500 | |
558 | |
| 501 | next line; |
559 | next line; |
| 502 | } |
560 | } |
| 503 | |
561 | |
| 504 | $scr .= "\x1b[7m" if $c & 0x80; |
562 | my $sgr = $SGR[ ($M[$i++ + 0x1000] & 15) | ($c & 0x80)]; |
| 505 | $scr .= $chr[$c & 0x7f] // sprintf "[%02x]", $c & 0x7f; |
563 | |
| 506 | $scr .= "\x1b[m" if $c & 0x80; |
564 | $scr .= $prev_sgr = $sgr if $sgr ne $prev_sgr; |
|
|
565 | |
|
|
566 | $scr .= $CHARMAP[$c & 0x7f]; |
| 507 | } |
567 | } |
| 508 | |
568 | |
| 509 | $scr .= "\x1b[K\noverflow\x1b[K\n"; |
569 | $scr .= "\e[K\nvideo overflow\e[K\n"; |
| 510 | last; |
570 | last; |
| 511 | } |
571 | } |
| 512 | |
572 | |
| 513 | if (0) { |
|
|
| 514 | $scr .= "\x1b[K\n"; |
|
|
| 515 | for my $o (0x200 .. 0x232) { |
|
|
| 516 | $scr .= sprintf "%04x:", $o * 16; |
|
|
| 517 | for (0..15) { |
|
|
| 518 | $scr .= sprintf " %02x", $M[$o * 16 + $_]; |
|
|
| 519 | } |
|
|
| 520 | $scr .= "\x1b[K\n"; |
|
|
| 521 | } |
|
|
| 522 | } |
|
|
| 523 | |
|
|
| 524 | $scr .= "\x1b[J"; |
573 | $scr .= "\e[m\e[J"; |
| 525 | |
574 | |
| 526 | syswrite STDOUT, $scr; |
575 | syswrite STDOUT, $scr; |
| 527 | } |
576 | } |
| 528 | |
577 | |
| 529 | ############################################################################# |
578 | ############################################################################# |
|
|
579 | # keyboard handling |
| 530 | |
580 | |
| 531 | if (@ARGV) { |
581 | # 0x080 shift, 0x100 ctrl |
| 532 | require IO::Pty; |
582 | my %KEYMAP = ( |
| 533 | $PTY = IO::Pty->new; |
583 | "\t" => 0x3a, |
|
|
584 | "\r" => 0x64, |
|
|
585 | "\n" => 0x44, |
|
|
586 | |
|
|
587 | "\x00" => 0x77 | 0x100, # CTRL-SPACE |
|
|
588 | "\x1c" => 0x45 | 0x100, # CTRL-\ |
|
|
589 | "\x1d" => 0x14 | 0x100, # CTRL-] |
|
|
590 | "\x1e" => 0x24 | 0x100, # CTRL-~ |
|
|
591 | "\x1f" => 0x75 | 0x100, # CTRL-? |
|
|
592 | |
|
|
593 | # hardcoded rxvt keys |
|
|
594 | "\e" => 0x2a, # ESC |
|
|
595 | "\e[3~" => 0x03, # DC |
|
|
596 | "\e[5~" => 0x7e, # CAPS LOCK (prior) |
|
|
597 | "\e[6~" => 0x6a, # NO SCROLL (next) |
|
|
598 | "\e[A" => 0x30, # UP |
|
|
599 | "\e[B" => 0x22, # DOWN |
|
|
600 | "\e[C" => 0x10, # RIGHT |
|
|
601 | "\e[D" => 0x20, # LEFT |
|
|
602 | "\e[a" => 0x30 | 0x080, # UP |
|
|
603 | "\e[b" => 0x22 | 0x080, # DOWN |
|
|
604 | "\e[c" => 0x10 | 0x080, # RIGHT |
|
|
605 | "\e[d" => 0x20 | 0x080, # LEFT |
|
|
606 | "\e[7~" => 0x7b, # SETUP (home) |
|
|
607 | "\e[8~" => 0x23, # BREAK (end) |
|
|
608 | "\e[8\$" => 0x23 | 0x080, # SHIFT BREAK / DISCONNECT (shift-end) |
|
|
609 | "\x7f" => 0x33, # BACKSPACE |
|
|
610 | |
|
|
611 | "\e[11~" => 0x32, # F1 |
|
|
612 | "\e[11~" => 0x42, # F2 |
|
|
613 | "\e[11~" => 0x31, # F3 |
|
|
614 | "\e[11~" => 0x41, # F4 |
|
|
615 | ); |
| 534 | |
616 | |
| 535 | my $slave = $PTY->slave; |
617 | @KEYMAP{map chr, 0x20 .. 0x40, 0x5b .. 0x7e} = unpack "C*", pack "H*", |
|
|
618 | "779ad5a9a8b8a755a6b5b6b466256575" . "351a3929283837273626d656e634e5f5" . "b9" # 20..40 |
|
|
619 | . "154514b7a5" . "244a6879591949485816574746766706" . "050a185a0817780969077a95c594a4"; # 5b..7e |
| 536 | |
620 | |
| 537 | unless (fork) { |
621 | $KEYMAP{"\x1f" & $_} ||= $KEYMAP{$_} | 0x100 for "a" .. "z"; # ctrl |
| 538 | $ENV{TERM} = $VT102 ? "vt102" : "vt100"; |
622 | $KEYMAP{"\x20" ^ $_} ||= $KEYMAP{$_} | 0x080 for "a" .. "z"; # shift |
| 539 | |
623 | |
| 540 | close $PTY; |
624 | my $KEYMATCH = join "|", map quotemeta, reverse sort keys %KEYMAP; |
|
|
625 | $KEYMATCH = qr{^($KEYMATCH)}s; |
| 541 | |
626 | |
| 542 | open STDIN , "<&", $slave; |
627 | my %KMOD; # currently pressed modifier keys |
| 543 | open STDOUT, ">&", $slave; |
|
|
| 544 | open STDERR, ">&", $slave; |
|
|
| 545 | |
628 | |
| 546 | close $slave; |
629 | sub key { |
|
|
630 | my ($key) = @_; |
| 547 | |
631 | |
| 548 | exec @ARGV; |
632 | push @KQUEUE, -0x7c if !($key & 0x100) && delete $KMOD{0x7c}; # ctrl-up |
| 549 | } |
633 | push @KQUEUE, -0x7d if !($key & 0x080) && delete $KMOD{0x7d}; # shift-up |
| 550 | |
634 | |
| 551 | close $slave; |
635 | push @KQUEUE, 0x7c if $key & 0x100 && !$KMOD{0x7c}++; # ctrl-down |
| 552 | } else { |
636 | push @KQUEUE, 0x7d if $key & 0x080 && !$KMOD{0x7d}++; # shift-down |
| 553 | open $PTY, "</dev/null" or die;#d |
|
|
| 554 | } |
|
|
| 555 | |
637 | |
| 556 | ############################################################################# |
638 | $key &= 0x7f; |
|
|
639 | push @KQUEUE, $key, -$key; |
|
|
640 | } |
| 557 | |
641 | |
|
|
642 | my $STDIN_BUF; |
|
|
643 | |
|
|
644 | sub stdin_parse { |
|
|
645 | key $KEYMAP{$1} |
|
|
646 | while $STDIN_BUF =~ s/$KEYMATCH//; |
|
|
647 | |
|
|
648 | # skip input we can't decipher |
|
|
649 | substr $STDIN_BUF, 0, 1, ""; |
|
|
650 | } |
|
|
651 | |
|
|
652 | if ($KBD) { |
|
|
653 | system "stty -icanon -icrnl -inlcr -echo min 1 time 0"; |
|
|
654 | eval q{ sub END { system "stty sane" } }; |
|
|
655 | $SIG{INT} = $SIG{TERM} = $SIG{QUIT} = sub { exit 1 }; |
|
|
656 | } |
|
|
657 | |
|
|
658 | ############################################################################# |
| 558 | # initial key input, to set up online mode etc. |
659 | # initial key input, to set up online mode etc. |
|
|
660 | # could be done via nvram defaults |
|
|
661 | |
| 559 | @KQUEUE = ( |
662 | @KQUEUE = ( |
| 560 | 0x7b, -0x7b, # setup |
663 | 0x7b, -0x7b, # setup |
| 561 | 0, # delay |
664 | 0, # delay |
| 562 | 0x28, -0x28, # 4, toggle local/online |
665 | 0x28, -0x28, # 4, toggle local/online |
| 563 | 0x38, -0x38, # 5, setup b |
666 | 0x38, -0x38, # 5, setup b |
| … | |
… | |
| 574 | 0x37, -0x37, # 6 toggle wrap around |
677 | 0x37, -0x37, # 6 toggle wrap around |
| 575 | 0x7b, -0x7b, # leave setup |
678 | 0x7b, -0x7b, # leave setup |
| 576 | ); |
679 | ); |
| 577 | |
680 | |
| 578 | ############################################################################# |
681 | ############################################################################# |
|
|
682 | # process/pty management |
| 579 | |
683 | |
| 580 | # 0x80 shift, 0x100 ctrl, 0x200 toggle |
684 | require IO::Pty; |
| 581 | my %KEYMAP = ( |
685 | $PTY = IO::Pty->new; |
| 582 | "\t" => 0x3a, |
|
|
| 583 | "\r" => 0x64, |
|
|
| 584 | "\n" => 0x44, |
|
|
| 585 | |
686 | |
| 586 | # hardcoded rxvt keys |
687 | my $slave = $PTY->slave; |
| 587 | "\e" => 0x2a, # ESC |
|
|
| 588 | "\e[3~" => 0x03, # DC |
|
|
| 589 | "\e[5~" => 0x7e, # CAPS LOCK (prior) |
|
|
| 590 | "\e[6~" => 0x6a, # NO SCROLL (next) |
|
|
| 591 | "\e[A" => 0x30, # UP |
|
|
| 592 | "\e[B" => 0x22, # DOWN |
|
|
| 593 | "\e[C" => 0x10, # RIGHT |
|
|
| 594 | "\e[D" => 0x20, # LEFT |
|
|
| 595 | "\e[a" => 0x30 | 0x080, # UP |
|
|
| 596 | "\e[b" => 0x22 | 0x080, # DOWN |
|
|
| 597 | "\e[c" => 0x10 | 0x080, # RIGHT |
|
|
| 598 | "\e[d" => 0x20 | 0x080, # LEFT |
|
|
| 599 | "\e[7~" => 0x7b, # SETUP (home) |
|
|
| 600 | "\e[8~" => 0x23, # BREAK (end) |
|
|
| 601 | "\e[8\$" => 0x23 | 0x080, # SHIFT BREAK / DISCONNECT (shift-end) |
|
|
| 602 | "\x7f" => 0x33, # BACKSPACE |
|
|
| 603 | |
688 | |
| 604 | "\e[11~" => 0x32, # F1 |
689 | $PTY->set_winsize (24, 80); |
| 605 | "\e[11~" => 0x42, # F2 |
|
|
| 606 | "\e[11~" => 0x31, # F3 |
|
|
| 607 | "\e[11~" => 0x41, # F4 |
|
|
| 608 | ); |
|
|
| 609 | |
690 | |
| 610 | @KEYMAP{map chr, 0x20..0x40} = unpack "C*", pack "H*", |
691 | unless (fork) { |
| 611 | "779ad5a9a8b8a755a6b5b6b466256575" . "351a3929283837273626d656e634e5f5" . "b9"; |
692 | $ENV{LC_ALL} = "C"; |
|
|
693 | $ENV{TERM} = $VT102 ? "vt102" : "vt100"; |
| 612 | |
694 | |
| 613 | @KEYMAP{map chr, 0x5b .. 0x7e} = unpack "C*", pack "H*", |
695 | close $PTY; |
| 614 | "154514b7a5" . "244a6879591949485816574746766706" . "050a185a0817780969077a95c594a4"; |
|
|
| 615 | |
696 | |
| 616 | $KEYMAP{"\x3f" & $_} ||= $KEYMAP{$_} | 0x100 for "a" .. "z"; # ctrl |
697 | open STDIN , "<&", $slave; |
| 617 | $KEYMAP{uc $_} ||= $KEYMAP{$_} | 0x080 for "a" .. "z"; # shift |
698 | open STDOUT, ">&", $slave; |
|
|
699 | open STDERR, ">&", $slave; |
| 618 | |
700 | |
| 619 | my $KEYMATCH = join "|", map quotemeta, reverse sort keys %KEYMAP; |
701 | system "stty ixoff erase ^H"; |
| 620 | $KEYMATCH = qr{^($KEYMATCH)}s; |
|
|
| 621 | |
702 | |
| 622 | sub key { |
703 | $PTY->make_slave_controlling_terminal; |
| 623 | my ($key) = @_; |
704 | $PTY->close_slave; |
| 624 | |
705 | |
| 625 | state %MOD; |
706 | @ARGV = "sh" unless @ARGV; |
| 626 | |
707 | exec @ARGV; |
| 627 | push @KQUEUE, -0x7c if !($key & 0x100) && delete $MOD{0x7c}; # ctrl-up |
|
|
| 628 | push @KQUEUE, -0x7d if !($key & 0x080) && delete $MOD{0x7d}; # shift-up |
|
|
| 629 | |
|
|
| 630 | push @KQUEUE, 0x7c if $key & 0x100 && !$MOD{0x7c}++; # ctrl-down |
|
|
| 631 | push @KQUEUE, 0x7d if $key & 0x080 && !$MOD{0x7d}++; # shift-down |
|
|
| 632 | |
|
|
| 633 | $key &= 0x7f; |
|
|
| 634 | push @KQUEUE, $key, -$key; |
|
|
| 635 | } |
708 | } |
| 636 | |
709 | |
| 637 | my $STDIN_BUF; |
710 | $PTY->close_slave; |
| 638 | |
711 | |
| 639 | sub stdin_parse { |
|
|
| 640 | key $KEYMAP{$1} |
|
|
| 641 | while $STDIN_BUF =~ s/$KEYMATCH//; |
|
|
| 642 | |
|
|
| 643 | # skip input we can't decipher |
|
|
| 644 | substr $STDIN_BUF, 0, 1, ""; |
|
|
| 645 | } |
|
|
| 646 | |
|
|
| 647 | if ($KBD) { |
|
|
| 648 | system "stty -icanon -icrnl -inlcr -echo min 1 time 0"; |
|
|
| 649 | eval q{ sub END { system "stty sane" } }; |
|
|
| 650 | $SIG{INT} = $SIG{TERM} = $SIG{QUIT} = sub { exit 1 }; |
|
|
| 651 | } |
|
|
| 652 | |
|
|
| 653 | ############################################################################# |
712 | ############################################################################# |
|
|
713 | # the actual hardware simulator |
| 654 | |
714 | |
| 655 | my @ICACHE; # compiled instruction cache |
715 | my @ICACHE; # compiled instruction/basic block cache |
| 656 | |
716 | |
|
|
717 | my $POWERSAVE; # powersave counter |
|
|
718 | |
|
|
719 | my $RIN; # libev for the less well-off |
|
|
720 | |
|
|
721 | (vec $RIN, 0, 1) = 1 if $KBD; |
|
|
722 | (vec $RIN, fileno $PTY, 1) = 1 if $PTY; |
|
|
723 | |
| 657 | # the cpu |
724 | # the cpu. |
| 658 | while () { |
725 | while () { |
| 659 | |
|
|
| 660 | # execute extended basic blocks |
726 | # execute extended basic blocks |
| 661 | $PC = ($ICACHE[$PC] ||= do { |
727 | $PC = ($ICACHE[$PC] ||= do { |
| 662 | my $pc = $PC; |
728 | my $pc = $PC; |
| 663 | |
729 | |
| 664 | my $insn = ""; |
730 | my $insn = ""; |
| 665 | |
731 | |
| 666 | # the jit compiler |
732 | # the jit compiler |
| 667 | for (0..15) { |
733 | for (0..31) { |
| 668 | |
|
|
| 669 | # optional tracing support |
|
|
| 670 | if (0) { |
|
|
| 671 | $insn .= qq< |
|
|
| 672 | if (\$PRSTATUS) { |
|
|
| 673 | status $pc; |
|
|
| 674 | die unless --\$PRSTATUS; |
|
|
| 675 | } |
|
|
| 676 | >; |
|
|
| 677 | } |
|
|
| 678 | |
|
|
| 679 | my $imm; |
734 | my $imm; |
| 680 | my $op = $op[$M[$pc++]]; |
735 | my $op = $op[$M[$pc++]]; |
| 681 | |
736 | |
| 682 | for ($op) { |
737 | for ($op) { |
| 683 | s/\bPUSH\b/\$M[--\$SP] =/g; # push byte to stack |
738 | s/\bPUSH\b/\$M[--\$SP] =/g; # push byte to stack |
| … | |
… | |
| 688 | |
743 | |
| 689 | s/\bPC\b/$pc/ge; # PC at end of insn |
744 | s/\bPC\b/$pc/ge; # PC at end of insn |
| 690 | s/\bBRA\b/return/g; # conditional jump |
745 | s/\bBRA\b/return/g; # conditional jump |
| 691 | s/\bJMP\b(.*)/$1\x00/sg; # unconditional jump |
746 | s/\bJMP\b(.*)/$1\x00/sg; # unconditional jump |
| 692 | |
747 | |
| 693 | s/\bIN\b/ sprintf "\$A = in_%02x", $M[$pc++]/xge; |
748 | s/\bIN\b/ sprintf "\$A = in_%02x", $M[$pc++]/xge; # in insns call in_HEX |
| 694 | s/\bOUT\b/sprintf "out_%02x \$A ", $M[$pc++]/xge; |
749 | s/\bOUT\b/sprintf "out_%02x \$A ", $M[$pc++]/xge; # out likewise |
| 695 | } |
750 | } |
| 696 | |
751 | |
| 697 | $insn .= "$op;\n"; |
752 | $insn .= "$op;\n"; |
| 698 | } |
753 | } |
| 699 | |
754 | |
| 700 | |
755 | |
| 701 | $insn .= "$pc"; |
756 | $insn .= $pc; |
| 702 | $insn =~ s/\x00.*$//s; |
757 | $insn =~ s/\x00.*$//s; |
| 703 | |
758 | |
| 704 | eval "use integer; sub { $insn }" or die "$insn: $@" |
759 | eval "use integer; sub { $insn }" or die "$insn: $@" |
| 705 | })->(); |
760 | })->(); |
| 706 | |
761 | |
| 707 | ++$CLK; |
762 | ++$CLK; |
| 708 | |
763 | |
| 709 | #TODO: just check on ret instructions or so |
764 | # things we do from time to time only |
| 710 | # the interrupt logic |
765 | unless ($CLK & 0xf) { |
| 711 | $x = $INTPEND & ~$INTMASK; |
766 | # do I/O |
| 712 | |
767 | |
| 713 | if (($RST || $x) && $IFF) { |
768 | unless ($CLK & 0xfff) { |
|
|
769 | if (select $x = $RIN, undef, undef, $POWERSAVE < 100 ? 0 : 0.2) { |
|
|
770 | |
|
|
771 | # pty/serial I/O |
|
|
772 | if ($PTY && (vec $x, fileno $PTY, 1) && (@PUSARTRECV < 128) && !@KQUEUE) { |
|
|
773 | sysread $PTY, my $buf, 256; |
|
|
774 | |
|
|
775 | # linux don't do cs7 and/or parity anymore, so we need to filter |
|
|
776 | # out xoff characters to avoid freezes. |
|
|
777 | push @PUSARTRECV, grep { ($_ & 0x7f) != 0x13 } unpack "C*", $buf; |
|
|
778 | } |
|
|
779 | |
|
|
780 | # keyboard input |
|
|
781 | if ($KBD && (vec $x, 0, 1)) { |
|
|
782 | # to avoid non-blocking mode on stdin (and stty min 0), we |
|
|
783 | # just read byte-by-byte after a select says there is data. |
|
|
784 | while (select my $rin = "\x01", undef, undef, 0) { |
|
|
785 | sysread STDIN, $STDIN_BUF, 1, length $STDIN_BUF |
|
|
786 | or last; |
|
|
787 | } |
|
|
788 | |
|
|
789 | stdin_parse if length $STDIN_BUF; |
|
|
790 | } |
|
|
791 | |
|
|
792 | $POWERSAVE = 0; # activity |
|
|
793 | } elsif (@PUSARTRECV || @KQUEUE) { |
|
|
794 | $POWERSAVE = 0; |
|
|
795 | } else { |
|
|
796 | ++$POWERSAVE; |
|
|
797 | } |
|
|
798 | } |
|
|
799 | |
|
|
800 | # kick off serial input interrupt quite often |
|
|
801 | $RST |= 2 if @PUSARTRECV && $XON; # VT100, but works on vt102, too (probably not used on real hardware though) |
|
|
802 | #$INTPEND |= 2 if @PUSARTRECV && $XON; # VT102, 6.5 rxrdy |
|
|
803 | |
|
|
804 | # kick off vertical retrace interrupt from time to time |
|
|
805 | unless ($CLK & 0x1ff) { |
|
|
806 | $RST |= 4; # vertical retrace |
|
|
807 | } |
|
|
808 | |
|
|
809 | # handle video hardware |
|
|
810 | unless ($CLK & 0x3fff) { |
|
|
811 | display; |
|
|
812 | } |
|
|
813 | } |
|
|
814 | |
|
|
815 | # the interrupt logic - we only interrupt after basic blocks |
|
|
816 | # which, as a side effect, ensures that we don't interrupt |
|
|
817 | # "ei; ret" sequences and thus reduce the risk of stack overflows. |
|
|
818 | if (($RST || ($INTPEND & ~$INTMASK)) && $IFF) { |
| 714 | # rst 1 kbd data available |
819 | # rst 1 kbd data available |
| 715 | # rst 2 pusart xmit+recv flag |
820 | # rst 2 pusart xmit+recv flag |
| 716 | # rst 4 vertical retrace |
821 | # rst 4 vertical retrace |
| 717 | # 5.5 vt125 mb7 trans ready (serial send?) |
822 | # 5.5 vt125 mb7 trans ready (serial send?) |
| 718 | # 6.5 vt125 mb7 read ready (something modem?) |
823 | # 6.5 vt125 mb7 read ready (something modem?) |
| 719 | # 7.5 vt125 mb7 vblank h(?) |
824 | # 7.5 vt125 mb7 vblank h(?) |
| 720 | # trap vt125 mbi init h(?) |
825 | # trap vt125 mbi init h(?) |
| 721 | my $vec; |
826 | my $vec; |
| 722 | |
827 | |
|
|
828 | my $pend = $INTPEND & ~$INTMASK; |
|
|
829 | |
| 723 | if ($x & 1) { $vec = 0x2c; $INTPEND &= ~1; |
830 | if ($pend & 1) { $vec = 0x2c; $INTPEND &= ~1; |
| 724 | } elsif ($x & 2) { $vec = 0x34; $INTPEND &= ~2; |
831 | } elsif ($pend & 2) { $vec = 0x34; $INTPEND &= ~2; |
| 725 | } elsif ($x & 4) { $vec = 0x3c; $INTPEND &= ~4; |
832 | } elsif ($pend & 4) { $vec = 0x3c; $INTPEND &= ~4; |
| 726 | # } elsif ($RST ) { $vec = $RST * 8; $RST = 0; # for some reason, this breaks vt102 |
833 | # } elsif ($RST ) { $vec = $RST * 8; $RST = 0; # the vt102 firmware doesn't like combined interrupts |
| 727 | } elsif ($RST & 1) { $vec = 0x08; $RST &= ~1; # separate is better for vt102 |
834 | } elsif ($RST & 1) { $vec = 0x08; $RST &= ~1; # separate is better for vt102 |
| 728 | } elsif ($RST & 2) { $vec = 0x10; $RST &= ~2; |
835 | } elsif ($RST & 2) { $vec = 0x10; $RST &= ~2; |
| 729 | } elsif ($RST & 4) { $vec = 0x20; $RST &= ~4; |
836 | } elsif ($RST & 4) { $vec = 0x20; $RST &= ~4; |
| 730 | } else { |
837 | } else { |
| 731 | die; |
838 | die; |
| 732 | } |
839 | } |
| 733 | |
840 | |
|
|
841 | # jump to the interrupt vector |
| 734 | $M[--$SP] = $PC >> 8; |
842 | $M[--$SP] = $PC >> 8; |
| 735 | $M[--$SP] = $PC & 0xff; |
843 | $M[--$SP] = $PC & 0xff; |
| 736 | $PC = $vec; |
844 | $PC = $vec; |
| 737 | |
845 | |
| 738 | $IFF = 0; |
846 | $IFF = 0; |
| 739 | } |
847 | } |
| 740 | |
|
|
| 741 | # things we do from time too time only |
|
|
| 742 | unless ($CLK & 0xf) { |
|
|
| 743 | # do I/O |
|
|
| 744 | |
|
|
| 745 | unless ($CLK & 0x7ff) { |
|
|
| 746 | |
|
|
| 747 | # pty/serial I/O |
|
|
| 748 | unless (@PUSARTRECV || @KQUEUE || !$PTY) { |
|
|
| 749 | my $rin = ""; (vec $rin, fileno $PTY, 1) = 1; |
|
|
| 750 | |
|
|
| 751 | if (select $rin, undef, undef, 0) { |
|
|
| 752 | sysread $PTY, my $buf, 256; |
|
|
| 753 | push @PUSARTRECV, unpack "C*", $buf; |
|
|
| 754 | } |
|
|
| 755 | } |
|
|
| 756 | |
|
|
| 757 | # keyboard input |
|
|
| 758 | if ($KBD) { |
|
|
| 759 | while (select my $rin = "\x01", undef, undef, 0) { |
|
|
| 760 | sysread STDIN, $STDIN_BUF, 1, length $STDIN_BUF |
|
|
| 761 | or last; |
|
|
| 762 | } |
|
|
| 763 | |
|
|
| 764 | stdin_parse if length $STDIN_BUF; |
|
|
| 765 | } |
|
|
| 766 | } |
|
|
| 767 | |
|
|
| 768 | # kick off various interrupts |
|
|
| 769 | |
|
|
| 770 | $RST |= 2 if @PUSARTRECV && $XON;# vt100, also works on vt102, probably by accident |
|
|
| 771 | #$INTPEND |= 2 if @PUSARTRECV && $XON;# real vt102 probably does it this way |
|
|
| 772 | |
|
|
| 773 | unless ($CLK & 0x3ff) { |
|
|
| 774 | $RST |= 4; # vertical retrace |
|
|
| 775 | } |
|
|
| 776 | |
|
|
| 777 | # handle video hardware |
|
|
| 778 | |
|
|
| 779 | unless ($CLK & 0x1fff) { |
|
|
| 780 | prscr; |
|
|
| 781 | } |
|
|
| 782 | } |
|
|
| 783 | } |
848 | } |
|
|
849 | |
|
|
850 | ############################################################################# |
|
|
851 | # roms in the data section + one newline |
|
|
852 | # |
|
|
853 | # vt100 @ 0x0000+0x0800 23-032E2 |
|
|
854 | # vt100 @ 0x0800+0x0800 23-061E2 |
|
|
855 | # vt100 @ 0x1000+0x0800 23-033E2 |
|
|
856 | # vt100 @ 0x1800+0x0800 23-034E2 |
|
|
857 | # |
|
|
858 | # vt102 @ 0x0000+0x2000 23-226E4 |
|
|
859 | # vt102 @ 0x8000+0x2000 23-225E4 |
|
|
860 | # |
|
|
861 | # vt131 @ 0xa000+0x0800 23-280E2 |
|
|
862 | # |
| 784 | |
863 | |
| 785 | __DATA__ |
864 | __DATA__ |
| 786 | 1N ; 0 >b/BWog<Gӂ,O $
O [ xI,ڥ # yOt ͤ[ zW>/2!b>>g$>%
!h w-!h >-4!j pO:{ y:! u:x!_yA[>y
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O [ xI,ڥ # yOt ͤ[ zW>/2!b>>g$>%
!h w-!h >-4!j pO:{ y:! u:x!_yA[>y
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| 787 | 2!0* w4ʘ> 2! ~î!N ̓/2!! "R !"" |
866 | 2!0* w4ʘ> 2! ~î!N ̓/2!! "R !"" |
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| … | |
… | |
| 892 | |
971 | |
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:,!ڢy2!:!OW!e! oһ$zW>0)1!2@3#4$5%6^7&8*9(-_=+`~[{]};:/?'",<.>\| poytwq ][iure1 `-9743=08652 Ѱ |
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| 894 | \lkgfa ';jhds
.,nbx* :B!4 |
973 | \lkgfa ';jhds
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| 895 | !O! ,ͳʄmÝ |
974 | !O! ,ͳʄmÝ |
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977 | "~AC>Bw2"!z"pv"x">Cw2"!n"pv"l"!!~< N[> 2,!NA p##!(0S{}ˠ>w #
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