| … | |
… | |
| 21 | #use common::sense; |
21 | #use common::sense; |
| 22 | |
22 | |
| 23 | my $VT102 = 1; |
23 | my $VT102 = 1; |
| 24 | my $VT131 = 0; |
24 | my $VT131 = 0; |
| 25 | my $AVO = 1; |
25 | my $AVO = 1; |
| 26 | my $KBD = 1; |
|
|
| 27 | |
26 | |
| 28 | if ($ARGV[0] =~ /^-?-vt100$/) { |
27 | shift, ($VT102 = 0), ($AVO = 0) if $ARGV[0] =~ /^-?-vt100$/; |
| 29 | shift; $VT102 = 0; $AVO = 0; |
28 | shift, ($VT102 = 0) if $ARGV[0] =~ /^-?-vt100\+avo$/; |
| 30 | } |
29 | shift if $ARGV[0] =~ /^-?-vt102$/; |
| 31 | |
30 | shift, ($VT131 = 1) if $ARGV[0] =~ /^-?-vt131$/; |
| 32 | if ($ARGV[0] =~ /^-?-vt100\+avo$/) { |
|
|
| 33 | shift; $VT102 = 0; $AVO = 1; |
|
|
| 34 | } |
|
|
| 35 | |
|
|
| 36 | if ($ARGV[0] =~ /^-?-vt102$/) { |
|
|
| 37 | shift; # default |
|
|
| 38 | } |
|
|
| 39 | |
|
|
| 40 | if ($ARGV[0] =~ /^-?-vt131$/) { |
|
|
| 41 | shift; $VT131 = 1; |
|
|
| 42 | } |
|
|
| 43 | |
31 | |
| 44 | if ($ARGV[0] =~ /^-/) { |
32 | if ($ARGV[0] =~ /^-/) { |
| 45 | die <<EOF; |
33 | die <<EOF; |
| 46 | |
34 | |
| 47 | VT102, A VT100/101/102/131 SIMULATOR |
35 | VT102, A VT100/101/102/131 SIMULATOR |
| … | |
… | |
| 84 | } |
72 | } |
| 85 | |
73 | |
| 86 | ############################################################################# |
74 | ############################################################################# |
| 87 | # ROM/hardware init |
75 | # ROM/hardware init |
| 88 | |
76 | |
|
|
77 | my $PTY; # the pty we allocated, if any |
|
|
78 | my $KBD = 1; |
|
|
79 | |
| 89 | my $ROMS = do { |
80 | my $ROMS = do { |
| 90 | binmode DATA; |
81 | binmode DATA; |
| 91 | local $/; |
82 | local $/; |
| 92 | <DATA> |
83 | <DATA> |
| 93 | }; |
84 | }; |
| 94 | |
85 | |
| 95 | 0x6801 == length $ROMS or die "corrupted rom image"; |
86 | 0x6801 == length $ROMS or die "corrupted rom image"; |
| 96 | |
|
|
| 97 | binmode STDOUT; |
|
|
| 98 | |
87 | |
| 99 | my @M = (0xff) x 65536; # main memory, = (0xff) x 65536; |
88 | my @M = (0xff) x 65536; # main memory, = (0xff) x 65536; |
| 100 | |
89 | |
| 101 | # populate mem with rom contents |
90 | # populate mem with rom contents |
| 102 | if ($VT102) { |
91 | if ($VT102) { |
| … | |
… | |
| 108 | } |
97 | } |
| 109 | |
98 | |
| 110 | ############################################################################# |
99 | ############################################################################# |
| 111 | # 8085 CPU registers and I/O support |
100 | # 8085 CPU registers and I/O support |
| 112 | |
101 | |
| 113 | my $PTY; # the pty we allocated, if any |
|
|
| 114 | |
|
|
| 115 | # 8080/8085 registers |
102 | # 8080/8085 registers |
| 116 | # b, c, d, e, h, l, a |
|
|
| 117 | my ($A, $B, $C, $D, $E, $H, $L, $A); |
103 | my ($A, $B, $C, $D, $E, $H, $L); |
| 118 | my ($PC, $SP, $IFF, $FA, $FZ, $FS, $FP, $FC); |
104 | my ($PC, $SP, $IFF, $FA, $FZ, $FS, $FP, $FC); |
| 119 | |
105 | |
| 120 | my $RST = 0; # 8080 pending interrupts |
106 | my $RST = 0; # 8080 pending interrupts |
| 121 | my $INTMASK = 7; # 8085 half interrupts |
107 | my $INTMASK = 7; # 8085 half interrupts |
| 122 | my $INTPEND = 0; # 8085 half interrupts |
108 | my $INTPEND = 0; # 8085 half interrupts |
| 123 | |
|
|
| 124 | my $x; # dummy temp for instructions |
|
|
| 125 | |
109 | |
| 126 | my $CLK; # rather inexact clock |
110 | my $CLK; # rather inexact clock |
| 127 | |
111 | |
| 128 | ############################################################################# |
112 | ############################################################################# |
| 129 | # the dreaded NVR1400 chip. not needed to get it going, but provided anyway |
113 | # the dreaded NVR1400 chip. not needed to get it going, but provided anyway |
| … | |
… | |
| 143 | sub { $NVR[$_[0]] = 0x3fff; }, # 5 erase |
127 | sub { $NVR[$_[0]] = 0x3fff; }, # 5 erase |
| 144 | sub { $NVRDATA = $NVR[$_[0]]; }, # 6 read |
128 | sub { $NVRDATA = $NVR[$_[0]]; }, # 6 read |
| 145 | sub { }, # 7 standby |
129 | sub { }, # 7 standby |
| 146 | ); |
130 | ); |
| 147 | |
131 | |
| 148 | my @bitidx; |
132 | my @NVR_BITIDX; |
| 149 | $bitidx[1 << $_] = 9 - $_ for 0..9; |
133 | $NVR_BITIDX[1 << $_] = 9 - $_ for 0..9; |
| 150 | |
134 | |
| 151 | # the nvr1400 state machine. what a monster |
135 | # the nvr1400 state machine. what a monster |
| 152 | sub nvr() { |
136 | sub nvr() { |
| 153 | my $a1 = $bitidx[(~$NVRADDR ) & 0x3ff]; |
137 | my $a1 = $NVR_BITIDX[(~$NVRADDR ) & 0x3ff]; |
| 154 | my $a0 = $bitidx[(~$NVRADDR >> 10) & 0x3ff]; |
138 | my $a0 = $NVR_BITIDX[(~$NVRADDR >> 10) & 0x3ff]; |
| 155 | |
139 | |
| 156 | # printf "NVR %02x A %020b %d %d D %02x\n", $NVRLATCH, $NVRADDR & 0xfffff, $a1, $a0, $NVRDATA; |
140 | # printf "NVR %02x A %020b %d %d D %02x\n", $NVRLATCH, $NVRADDR & 0xfffff, $a1, $a0, $NVRDATA; |
| 157 | |
141 | |
| 158 | $NVRCMD[($NVRLATCH >> 1) & 7]($a1 * 10 + $a0, $NVRLATCH & 1) |
142 | $NVRCMD[($NVRLATCH >> 1) & 7]($a1 * 10 + $a0, $NVRLATCH & 1) |
| 159 | } |
143 | } |
| … | |
… | |
| 306 | sub in_1b { 0xff } # vt102 unknown |
290 | sub in_1b { 0xff } # vt102 unknown |
| 307 | |
291 | |
| 308 | ############################################################################# |
292 | ############################################################################# |
| 309 | # 8085 cpu opcodes and flag handling |
293 | # 8085 cpu opcodes and flag handling |
| 310 | |
294 | |
|
|
295 | my $x; # dummy scratchpad for opcodes |
|
|
296 | |
| 311 | sub sf { # set flags (ZSC - AP not implemented) |
297 | sub sf { # set flags (ZSC - AP not implemented) |
| 312 | $FS = $_[0] & 0x080; |
298 | $FS = $_[0] & 0x080; |
| 313 | $FZ = !($_[0] & 0x0ff); |
299 | $FZ = !($_[0] & 0x0ff); |
| 314 | $FC = $_[0] & 0x100; |
300 | $FC = $_[0] & 0x100; |
| 315 | |
301 | |
| … | |
… | |
| 498 | $M[$PC], $op[$M[$PC]]; |
484 | $M[$PC], $op[$M[$PC]]; |
| 499 | } |
485 | } |
| 500 | |
486 | |
| 501 | ############################################################################# |
487 | ############################################################################# |
| 502 | # video emulation |
488 | # video emulation |
|
|
489 | |
|
|
490 | binmode STDOUT; |
| 503 | |
491 | |
| 504 | my @CHARMAP = ( |
492 | my @CHARMAP = ( |
| 505 | " " , "\x{29eb}", "\x{2592}", "\x{2409}", |
493 | " " , "\x{29eb}", "\x{2592}", "\x{2409}", |
| 506 | "\x{240c}", "\x{240d}", "\x{240a}", "\x{00b0}", |
494 | "\x{240c}", "\x{240d}", "\x{240a}", "\x{00b0}", |
| 507 | "\x{00b1}", "\x{2424}", "\x{240b}", "\x{2518}", |
495 | "\x{00b1}", "\x{2424}", "\x{240b}", "\x{2518}", |
| … | |
… | |
| 750 | |
738 | |
| 751 | $insn .= "$op;\n"; |
739 | $insn .= "$op;\n"; |
| 752 | } |
740 | } |
| 753 | |
741 | |
| 754 | |
742 | |
| 755 | $insn .= "$pc"; |
743 | $insn .= $pc; |
| 756 | $insn =~ s/\x00.*$//s; |
744 | $insn =~ s/\x00.*$//s; |
| 757 | |
745 | |
| 758 | eval "use integer; sub { $insn }" or die "$insn: $@" |
746 | eval "use integer; sub { $insn }" or die "$insn: $@" |
| 759 | })->(); |
747 | })->(); |
| 760 | |
748 | |
| … | |
… | |
| 812 | # 6.5 vt125 mb7 read ready (something modem?) |
800 | # 6.5 vt125 mb7 read ready (something modem?) |
| 813 | # 7.5 vt125 mb7 vblank h(?) |
801 | # 7.5 vt125 mb7 vblank h(?) |
| 814 | # trap vt125 mbi init h(?) |
802 | # trap vt125 mbi init h(?) |
| 815 | my $vec; |
803 | my $vec; |
| 816 | |
804 | |
| 817 | $x = $INTPEND & ~$INTMASK; |
805 | my $pend = $INTPEND & ~$INTMASK; |
| 818 | |
806 | |
| 819 | if ($x & 1) { $vec = 0x2c; $INTPEND &= ~1; |
807 | if ($pend & 1) { $vec = 0x2c; $INTPEND &= ~1; |
| 820 | } elsif ($x & 2) { $vec = 0x34; $INTPEND &= ~2; |
808 | } elsif ($pend & 2) { $vec = 0x34; $INTPEND &= ~2; |
| 821 | } elsif ($x & 4) { $vec = 0x3c; $INTPEND &= ~4; |
809 | } elsif ($pend & 4) { $vec = 0x3c; $INTPEND &= ~4; |
| 822 | # } elsif ($RST ) { $vec = $RST * 8; $RST = 0; # the vt102 firmware doesn't like combined interrupts |
810 | # } elsif ($RST ) { $vec = $RST * 8; $RST = 0; # the vt102 firmware doesn't like combined interrupts |
| 823 | } elsif ($RST & 1) { $vec = 0x08; $RST &= ~1; # separate is better for vt102 |
811 | } elsif ($RST & 1) { $vec = 0x08; $RST &= ~1; # separate is better for vt102 |
| 824 | } elsif ($RST & 2) { $vec = 0x10; $RST &= ~2; |
812 | } elsif ($RST & 2) { $vec = 0x10; $RST &= ~2; |
| 825 | } elsif ($RST & 4) { $vec = 0x20; $RST &= ~4; |
813 | } elsif ($RST & 4) { $vec = 0x20; $RST &= ~4; |
| 826 | } else { |
814 | } else { |
| … | |
… | |
| 841 | # vt100 @ 0x0000+0x0800 23-032E2 |
829 | # vt100 @ 0x0000+0x0800 23-032E2 |
| 842 | # vt100 @ 0x0800+0x0800 23-061E2 |
830 | # vt100 @ 0x0800+0x0800 23-061E2 |
| 843 | # vt100 @ 0x1000+0x0800 23-033E2 |
831 | # vt100 @ 0x1000+0x0800 23-033E2 |
| 844 | # vt100 @ 0x1800+0x0800 23-034E2 |
832 | # vt100 @ 0x1800+0x0800 23-034E2 |
| 845 | # |
833 | # |
| 846 | # vt102 @ 0x0000+0x8000 23-226E4 |
834 | # vt102 @ 0x0000+0x2000 23-226E4 |
| 847 | # vt102 @ 0x8000+0x8000 23-225E4 |
835 | # vt102 @ 0x8000+0x2000 23-225E4 |
| 848 | # |
836 | # |
| 849 | # vt131 @ 0xa000+0x0800 23-280E2 |
837 | # vt131 @ 0xa000+0x0800 23-280E2 |
| 850 | # |
838 | # |
| 851 | |
839 | |
| 852 | __DATA__ |
840 | __DATA__ |
