| … | |
… | |
| 15 | # |
15 | # |
| 16 | |
16 | |
| 17 | # If this file contains embedded ROMs, the above copyright notice does |
17 | # If this file contains embedded ROMs, the above copyright notice does |
| 18 | # not apply to them. |
18 | # not apply to them. |
| 19 | |
19 | |
| 20 | # this hack is not considered release ready in and way, shape, or form |
20 | use 5.010; |
| 21 | # ./vt102 bash |
21 | use strict; |
| 22 | # ./vt102 telnet towel.blinkenlights.nl |
22 | use integer; |
| 23 | # ./vt102 curl http://artscene.textfiles.com/vt100/trekvid.vt |
|
|
| 24 | # ./vt102 curl http://artscene.textfiles.com/vt100/surf.vt # in 3d! |
|
|
| 25 | |
|
|
| 26 | # TODO: ctrl |
|
|
| 27 | |
|
|
| 28 | use common::sense; |
23 | #use common::sense; |
| 29 | |
|
|
| 30 | $| = 1; |
|
|
| 31 | |
24 | |
| 32 | my $VT102 = 1; |
25 | my $VT102 = 1; |
| 33 | my $AVO = $VT102 || 1; |
26 | my $VT131 = 0; |
| 34 | my $KBD = 1; |
27 | my $AVO = 1; |
| 35 | |
28 | |
|
|
29 | shift, ($VT102 = 0), ($AVO = 0) if $ARGV[0] =~ /^-?-vt100$/; |
|
|
30 | shift, ($VT102 = 0) if $ARGV[0] =~ /^-?-vt100\+avo$/; |
|
|
31 | shift if $ARGV[0] =~ /^-?-vt102$/; |
|
|
32 | shift, ($VT131 = 1) if $ARGV[0] =~ /^-?-vt131$/; |
|
|
33 | |
|
|
34 | # vt100 wps = word processing roms |
|
|
35 | # vt101 = vt102 - avo, but custom rom? really? |
|
|
36 | # vt103 = vt100 + tu58 tape drive |
|
|
37 | # vt125 = vt100 + gpo graphics processor |
|
|
38 | # vt132 = vt100 + avo, stp |
|
|
39 | # vt180 = vt100 + z80 cp/m |
|
|
40 | |
|
|
41 | if ($ARGV[0] =~ /^-/) { |
|
|
42 | die <<EOF; |
|
|
43 | |
|
|
44 | VT102, A VT100/102/131 SIMULATOR |
|
|
45 | |
|
|
46 | Usage: |
|
|
47 | |
|
|
48 | $0 [option] [program [args]] |
|
|
49 | |
|
|
50 | Examples: |
|
|
51 | |
|
|
52 | $0 bash |
|
|
53 | $0 telnet towel.blinkenlights.nl |
|
|
54 | $0 curl http://artscene.textfiles.com/vt100/trekvid.vt |
|
|
55 | $0 curl http://artscene.textfiles.com/vt100/surf.vt # in 3d! |
|
|
56 | |
|
|
57 | Option can be one of: |
|
|
58 | |
|
|
59 | --vt100 |
|
|
60 | --vt100+avo |
|
|
61 | --vt102 |
|
|
62 | --vt131 |
|
|
63 | |
|
|
64 | Non-obvious special keys are: |
|
|
65 | |
|
|
66 | SET UP Home |
|
|
67 | BACKSPACE Rubout |
|
|
68 | CAPS LOCK Prior/PgUp |
|
|
69 | NO SCROLL Next/PgDown |
|
|
70 | BREAK End |
|
|
71 | CTRL-C Insert |
|
|
72 | |
|
|
73 | Set-Up Guide: |
|
|
74 | |
|
|
75 | http://vt100.net/docs/vt102-ug/chapter3.html#S3.6 |
|
|
76 | |
|
|
77 | Author: |
|
|
78 | |
|
|
79 | Marc Lehmann <vt102\@schmorp.de> |
|
|
80 | |
|
|
81 | EOF |
|
|
82 | } |
|
|
83 | |
| 36 | ############################################################################# |
84 | ############################################################################# |
|
|
85 | # ROM/hardware init |
| 37 | |
86 | |
| 38 | my $PTY; # the pty we allocated, if any |
87 | my $PTY; # the pty we allocated, if any |
|
|
88 | my $KBD = 1; |
| 39 | |
89 | |
| 40 | my $ROM = do { |
90 | my $ROMS = do { |
| 41 | binmode DATA; |
91 | binmode DATA; |
| 42 | local $/; |
92 | local $/; |
| 43 | <DATA> |
93 | <DATA> |
| 44 | }; |
94 | }; |
| 45 | |
95 | |
| 46 | 0x6001 == length $ROM or die "corrupted rom image"; |
96 | 0x6801 == length $ROMS or die "corrupted rom image"; |
| 47 | |
97 | |
| 48 | binmode STDOUT; |
|
|
| 49 | |
|
|
| 50 | my @M = (0xff) x 65536; # main memory, = (0xff) x 65536; |
98 | my @M = (0xff) x 65536; # main memory |
| 51 | |
99 | |
| 52 | # populate mem with rom contents |
100 | # populate mem with rom contents |
| 53 | if ($VT102) { |
101 | if ($VT102) { |
| 54 | @M[0x0000 .. 0x1fff] = unpack "C*", substr $ROM, 0x2000, 0x2000; |
102 | @M[0x0000 .. 0x1fff] = unpack "C*", substr $ROMS, 0x2000, 0x2000; |
| 55 | @M[0x8000 .. 0x9fff] = unpack "C*", substr $ROM, 0x4000, 0x2000; |
103 | @M[0x8000 .. 0x9fff] = unpack "C*", substr $ROMS, 0x4000, 0x2000; |
|
|
104 | @M[0xa000 .. 0xa7ff] = unpack "C*", substr $ROMS, 0x6000, 0x0800 if $VT131; |
| 56 | } else { |
105 | } else { |
| 57 | @M[0x0000 .. 0x1fff] = unpack "C*", substr $ROM, 0x0000, 0x2000; |
106 | @M[0x0000 .. 0x1fff] = unpack "C*", substr $ROMS, 0x0000, 0x2000; |
| 58 | } |
107 | } |
| 59 | |
108 | |
| 60 | ############################################################################# |
109 | ############################################################################# |
| 61 | |
110 | # 8085 CPU registers and I/O support |
| 62 | my $PRSTATUS = 0; |
|
|
| 63 | |
111 | |
| 64 | # 8080/8085 registers |
112 | # 8080/8085 registers |
| 65 | # b, c, d, e, h, l, a |
113 | my ($A, $B, $C, $D, $E, $H, $L); # 8 bit general purpose |
| 66 | my ($A, $B, $C, $D, $E, $H, $L, $A); |
114 | my ($PC, $SP, $IFF); # program counter, stack pointer, interrupt flag |
| 67 | my ($PC, $SP, $IFF, $FA, $FZ, $FS, $FP, $FC); |
115 | my ($FA, $FZ, $FS, $FP, $FC); # condition codes (psw) |
| 68 | |
116 | |
| 69 | my $RST = 0; # 8080 pending interrupts |
117 | my $RST = 0; # pending interrupts (external interrupt logic) |
| 70 | my $INTMASK = 7; # 8085 half interrupts |
118 | my $INTMASK = 7; # 8085 half interrupt mask |
| 71 | my $INTPEND = 0; # 8085 half interrupts |
119 | my $INTPEND = 0; # 8085 half interrupts pending |
| 72 | |
120 | |
| 73 | my $x; # dummy temp for instructions |
121 | my $CLK; # rather inexact clock, counts extended basic blocks |
| 74 | |
122 | |
| 75 | my $CLK; # rather inexact clock |
|
|
| 76 | |
|
|
| 77 | ############################################################################# |
123 | ############################################################################# |
|
|
124 | # the dreaded NVR1400 chip. not needed to get it going, but provided anyway |
| 78 | |
125 | |
| 79 | # nvram |
126 | # nvram |
| 80 | my @NVR = (0x3fff) x 100; # vt102: 214e accum, 214f only lower 8 bit used, first 44 bytes |
127 | my @NVR = (0x3fff) x 100; # vt102: 214e accum, 214f only lower 8 bit used, first 44 bytes |
| 81 | my $NVRADDR; |
128 | my $NVRADDR; |
| 82 | my $NVRDATA; |
129 | my $NVRDATA; |
| 83 | my $NVRLATCH; |
130 | my $NVRLATCH; |
| 84 | |
131 | |
| 85 | #$NVR[$_] = $_ for 0..99;#d# |
|
|
| 86 | |
|
|
| 87 | my @NVRCMD = ( |
132 | my @NVRCMD = ( |
| 88 | sub { # accept data |
|
|
| 89 | $NVRDATA = ($NVRDATA << 1) + $_[1]; |
133 | sub { $NVRDATA = ($NVRDATA << 1) + $_[1]; }, # 0 accept data |
| 90 | }, |
134 | sub { $NVRADDR = ($NVRADDR << 1) + $_[1]; }, # 1 accept addr |
| 91 | sub { # accept addr |
135 | sub { ($NVRDATA <<= 1) & 0x4000 }, # 2 shift out |
| 92 | $NVRADDR = ($NVRADDR << 1)+ $_[1]; |
136 | undef, # 3 not used, will barf |
| 93 | }, |
|
|
| 94 | sub { # shift out |
|
|
| 95 | my $bit = $NVRDATA & 0x02000; |
|
|
| 96 | $NVRDATA *= 2; |
|
|
| 97 | $bit |
|
|
| 98 | }, |
|
|
| 99 | undef, |
|
|
| 100 | sub { # write |
|
|
| 101 | print "NVR WRITE $_[0]\n";#d# |
|
|
| 102 | $NVR[$_[0]] = $NVRDATA & 0x3fff; |
137 | sub { $NVR[$_[0]] = $NVRDATA & 0x3fff; }, # 4 write |
| 103 | }, |
138 | sub { $NVR[$_[0]] = 0x3fff; }, # 5 erase |
| 104 | sub { # erase |
139 | sub { $NVRDATA = $NVR[$_[0]]; }, # 6 read |
| 105 | print "NVR ERASE $_[0]\n";#d# |
140 | sub { }, # 7 standby |
| 106 | $NVR[$_[0]] = 0x3fff; |
|
|
| 107 | }, |
|
|
| 108 | sub { # read |
|
|
| 109 | # print "NVR READ $_[0] = $NVR[$_[0]]\n";#d# |
|
|
| 110 | $NVRDATA = $NVR[$_[0]]; |
|
|
| 111 | }, |
|
|
| 112 | sub { # standby |
|
|
| 113 | }, |
|
|
| 114 | ); |
141 | ); |
| 115 | |
142 | |
| 116 | my @bitidx; |
143 | my @NVR_BITIDX; $NVR_BITIDX[1 << $_] = 9 - $_ for 0..9; |
| 117 | $bitidx[1 << $_] = 9 - $_ for 0..9; |
|
|
| 118 | |
144 | |
| 119 | # the nvr1400 state machine. what a monster |
145 | # the nvr1400 state machine. what a monster |
| 120 | sub nvr() { |
146 | sub nvr() { |
| 121 | my $a1 = $bitidx[(~$NVRADDR ) & 0x3ff]; |
147 | my $a1 = $NVR_BITIDX[(~$NVRADDR ) & 0x3ff]; |
| 122 | my $a0 = $bitidx[(~$NVRADDR >> 10) & 0x3ff]; |
148 | my $a0 = $NVR_BITIDX[(~$NVRADDR >> 10) & 0x3ff]; |
| 123 | |
|
|
| 124 | # printf "NVR %02x A %020b %d %d D %02x\n", $NVRLATCH, $NVRADDR & 0xfffff, $a1, $a0, $NVRDATA; |
|
|
| 125 | |
149 | |
| 126 | $NVRCMD[($NVRLATCH >> 1) & 7]($a1 * 10 + $a0, $NVRLATCH & 1) |
150 | $NVRCMD[($NVRLATCH >> 1) & 7]($a1 * 10 + $a0, $NVRLATCH & 1) |
| 127 | } |
151 | } |
| 128 | |
152 | |
| 129 | ############################################################################# |
153 | ############################################################################# |
|
|
154 | # I/O ports - output |
| 130 | |
155 | |
| 131 | my $DC11 = 0; # 4 bit commands |
156 | my $DC11_REVERSE = 0; # light background? |
| 132 | my $DC12 = 0; |
|
|
| 133 | |
157 | |
| 134 | my $XON = 1; # false if terminal wants us to pause |
158 | my $XON = 1; # false if terminal wants us to pause |
| 135 | my $PUSARTCMD; |
159 | my $PUSARTCMD; |
| 136 | |
160 | |
|
|
161 | my $KSTATUS; # keyboard status (click + scan flag + leds) |
| 137 | my @KXMIT; # current scan queue |
162 | my @KXMIT; # current scan queue |
| 138 | my %KXMIT; # currently pressed keys |
163 | my %KXMIT; # currently pressed keys |
| 139 | my @KQUEUE; # key event queue |
164 | my @KQUEUE; # key event queue |
| 140 | my $KXCNT; # count for debouncew |
165 | my $KXCNT; # count for debouncew |
| 141 | my @PUSARTRECV; |
166 | |
| 142 | my $KSTATUS; |
167 | my @PUSARTRECV; # serial input (to terminal) queue |
| 143 | |
168 | |
| 144 | sub out_00 { # pusartdata |
169 | sub out_00 { # pusartdata |
| 145 | # handle xon/xoff, but also pass it through |
170 | # handle xon/xoff, but also pass it through |
| 146 | if ($_[0] == 0x13) { |
171 | if ($_[0] == 0x13) { |
| 147 | $XON = 0; |
172 | $XON = 0; |
| … | |
… | |
| 154 | syswrite $PTY, chr $_[0]; |
179 | syswrite $PTY, chr $_[0]; |
| 155 | |
180 | |
| 156 | $INTPEND |= 1; |
181 | $INTPEND |= 1; |
| 157 | } |
182 | } |
| 158 | |
183 | |
| 159 | sub out_01 { |
184 | sub out_01 { # pusartcmd |
| 160 | $PUSARTCMD = shift; |
185 | $PUSARTCMD = shift; |
| 161 | |
186 | |
| 162 | $INTPEND |= 1 if $PUSARTCMD & 0x01; # VT102, 5.5 txrdy |
187 | $INTPEND |= 1 if $PUSARTCMD & 0x01; # VT102, 5.5 txrdy |
| 163 | $INTPEND |= 2 if $PUSARTCMD & 0x04 && !@PUSARTRECV; # VT102, 6.5 rxrdy, needed for some reason |
188 | $INTPEND |= 2 if $PUSARTCMD & 0x04 && !@PUSARTRECV; # VT102, 6.5 rxrdy, needed for some reason |
| 164 | } |
189 | } |
| 165 | |
190 | |
| 166 | sub out_02 { } # baudrate generator |
191 | sub out_02 { } # baudrate generator |
| 167 | |
192 | |
| 168 | sub out_23 { } # unknown |
193 | sub out_23 { } # vt102 unknown |
| 169 | sub out_27 { } # unknown |
194 | sub out_27 { } # vt102 unknown |
| 170 | sub out_2f { } # unknown, connected to in 0f |
195 | sub out_2f { } # vt102 unknown, connected to in 0f |
| 171 | |
196 | |
| 172 | sub out_42 { } # brightness |
197 | sub out_42 { } # brightness |
| 173 | |
198 | |
| 174 | sub out_62 { |
199 | sub out_62 { # nvr latch register (4 bits) |
| 175 | $NVRLATCH = shift; |
200 | $NVRLATCH = shift; |
| 176 | } |
201 | } |
| 177 | |
202 | |
| 178 | sub out_a2 { $DC11 = shift } |
203 | sub out_a2 { # device control 011 |
|
|
204 | my $dc11 = 0x0f & shift; |
|
|
205 | |
|
|
206 | $DC11_REVERSE = 1 if $dc11 == 0b1010; |
|
|
207 | $DC11_REVERSE = 0 if $dc11 == 0b1011; |
|
|
208 | } |
|
|
209 | |
| 179 | sub out_c2 { } # unknown |
210 | sub out_c2 { } # unknown |
| 180 | sub out_d2 { $DC12 = shift } |
211 | sub out_d2 { } # device control 012, 0..3 == 80c/132c/60hz/50hz |
| 181 | |
212 | |
| 182 | sub out_82 { |
213 | sub out_82 { # keyboard txmit |
| 183 | # keyboard |
214 | # CLICK STARTSCAN ONLINE LOCKED | L1 L2 L3 L4 (vt100) |
| 184 | |
|
|
| 185 | # CLICK STARTSCAN ONLINE LOCKED | CTS DSR INSERT L1(?) |
215 | # CLICK STARTSCAN ONLINE LOCKED | CTS DSR INS L1 (vt102) |
| 186 | # CLICK STARTSCAN ONLINE LOCKED | LED1 LED2 LED3 LED4 |
|
|
| 187 | $KSTATUS = $_[0]; |
216 | $KSTATUS = $_[0]; |
| 188 | |
217 | |
| 189 | # start new scan unless scan in progress |
218 | # start new scan unless scan is in progress |
| 190 | if (($_[0] & 0x40) && !@KXMIT) { |
219 | if (($_[0] & 0x40) && !@KXMIT) { |
| 191 | # do not reply with keys in locked mode |
220 | # do not reply with keys in locked mode |
| 192 | # or during post (0xff), |
221 | # or during post (0xff), |
| 193 | # mostly to skip init and not fail POST, |
222 | # mostly to skip init and not fail POST, |
| 194 | # and to send startup keys only when terminal is ready |
223 | # and to send startup keys only when terminal is ready |
| … | |
… | |
| 214 | $RST |= 1; |
243 | $RST |= 1; |
| 215 | } |
244 | } |
| 216 | } |
245 | } |
| 217 | |
246 | |
| 218 | ############################################################################# |
247 | ############################################################################# |
|
|
248 | # I/O ports - input |
| 219 | |
249 | |
| 220 | my $NVRBIT; |
250 | my $NVRBIT; # the current nvr data bit |
| 221 | my $LBA; |
251 | my $LBA6; # twice the frequenxy of LBA7 |
| 222 | |
252 | |
| 223 | sub in_00 { # pusart data |
253 | sub in_00 { # pusart data |
| 224 | # interrupt not generated here, because infinite |
254 | # interrupt not generated here, because infinite |
| 225 | # speed does not go well with the vt102. |
255 | # speed does not go well with the vt102. |
| 226 | |
256 | |
| … | |
… | |
| 230 | sub in_01 { # pusart status |
260 | sub in_01 { # pusart status |
| 231 | # DSR SYNDET FE OE | PE TXEMPTY RXRDY TXRDY |
261 | # DSR SYNDET FE OE | PE TXEMPTY RXRDY TXRDY |
| 232 | 0x85 + (@PUSARTRECV && 0x02) |
262 | 0x85 + (@PUSARTRECV && 0x02) |
| 233 | } |
263 | } |
| 234 | |
264 | |
| 235 | sub in_22 { # modem buffer(?) |
265 | sub in_22 { # modem buffer |
| 236 | # wild guess: -CTS -SPDI -RI -CD 0 0 0 0 |
266 | # wild guess: -CTS -SPDI -RI -CD 0 0 0 0 |
| 237 | 0x20 |
267 | 0x20 |
| 238 | } |
268 | } |
| 239 | |
269 | |
| 240 | sub in_0f { } # unknown, connected to out 2f |
270 | sub in_0f { 0xff } # vt102 unknown, connected to out 2f |
| 241 | |
271 | |
| 242 | sub in_42 { # flag buffer |
272 | sub in_42 { # flag buffer |
| 243 | ++$LBA; |
273 | ++$LBA6; |
| 244 | |
274 | |
| 245 | $NVRBIT = nvr ? 0x20 : 0x00 if ($LBA & 0x3) == 0x2; |
275 | $NVRBIT = nvr ? 0x20 : 0x00 if ($LBA6 & 0x3) == 0x2; |
| 246 | |
276 | |
| 247 | # KBD_XMITEMPTY LBA7 NVRDATA ODDFIELD - OPTION !GFX !AVO PUSART_TXRDY |
277 | # KBD_XMITEMPTY LBA7 NVRDATA ODDFIELD - OPTION !GFX !AVO PUSART_TXRDY |
| 248 | |
278 | |
| 249 | my $f = 0x85 | $NVRBIT; |
279 | my $f = 0x85 | $NVRBIT; |
| 250 | |
280 | |
| 251 | $f |= 0x02 unless $AVO; |
281 | $f |= 0x02 unless $AVO; |
| 252 | $f |= 0x40 if $LBA & 0x2; |
282 | $f |= 0x40 if $LBA6 & 0x2; |
| 253 | |
283 | |
| 254 | $f |
284 | $f |
| 255 | } |
285 | } |
| 256 | |
286 | |
| 257 | sub in_82 { # tbmt keyboard uart |
287 | sub in_82 { # tbmt keyboard uart |
| … | |
… | |
| 259 | |
289 | |
| 260 | $RST |= 1; |
290 | $RST |= 1; |
| 261 | shift @KXMIT |
291 | shift @KXMIT |
| 262 | } |
292 | } |
| 263 | |
293 | |
| 264 | sub in_03 { 0xff } # unknown, printer uart input? |
294 | sub in_03 { 0xff } # vt102 unknown, printer uart input? |
| 265 | sub in_0b { 0xff } # unknown |
295 | sub in_0b { 0xff } # vt102 unknown |
| 266 | sub in_17 { 0xff } # unknown, printer status clear by reading? |
296 | sub in_17 { 0xff } # vt102 unknown, printer status clear by reading? |
| 267 | sub in_1b { 0xff } # unknown |
297 | sub in_1b { 0xff } # vt102 unknown |
| 268 | |
298 | |
| 269 | ############################################################################# |
299 | ############################################################################# |
|
|
300 | # 8085 cpu opcodes and flag handling |
| 270 | |
301 | |
|
|
302 | my $x; # dummy scratchpad for opcodes |
|
|
303 | |
| 271 | sub sf { # set flags (ZSC - AP not implemented) |
304 | sub sf { # set flags, full version (ZSC - AP not implemented) |
|
|
305 | $FS = $_[0] & 0x080; |
|
|
306 | $FZ = !($_[0] & 0x0ff); |
|
|
307 | $FC = $_[0] & 0x100; |
|
|
308 | |
|
|
309 | $_[0] &= 0xff; |
|
|
310 | } |
|
|
311 | |
|
|
312 | sub sf8 { # set flags, for 8-bit results (ZSC - AP not implemented) |
|
|
313 | $FS = $_[0] & 0x080; |
|
|
314 | $FZ = !($_[0] & 0x0ff); |
|
|
315 | $FC = 0; |
|
|
316 | } |
|
|
317 | |
|
|
318 | sub sf_nc { # set flags, except carry |
| 272 | $FS = $_[0] & 0x080; |
319 | $FS = $_[0] & 0x080; |
| 273 | $FZ = ($_[0] & 0x0ff) == 0; |
320 | $FZ = ($_[0] & 0x0ff) == 0; |
| 274 | $FC = $_[0] & 0x100; |
|
|
| 275 | |
321 | |
| 276 | $_[0] & 0xff |
322 | $_[0] &= 0xff; |
| 277 | } |
323 | } |
| 278 | |
324 | |
| 279 | sub sf_nc { # set flags except carry |
325 | # opcode table |
| 280 | $FS = $_[0] & 0x080; |
|
|
| 281 | $FZ = ($_[0] & 0x0ff) == 0; |
|
|
| 282 | |
|
|
| 283 | $_[0] & 0xff |
|
|
| 284 | } |
|
|
| 285 | |
|
|
| 286 | my @op = map { sprintf "status(); die 'unknown op %02x'", $_ } 0 .. 255; |
326 | my @op = map { sprintf "status(); die 'unknown op %02x'", $_ } 0x00 .. 0xff; |
| 287 | my @ops; |
|
|
| 288 | |
327 | |
| 289 | my @reg = qw($B $C $D $E $H $L $M[$H*256+$L] $A); |
328 | my @reg = qw($B $C $D $E $H $L $M[$H*256+$L] $A); # r/m encoding |
| 290 | my @cc = ('if !$FZ', 'if $FZ', 'if !$FC', 'if $FC', ';die', ';die', 'if !$FS', 'if $FS'); # die == unimplemented $FP parity |
329 | my @cc = ('!$FZ', '$FZ', '!$FC', '$FC', 'die;', 'die;', '!$FS', '$FS'); # cc encoding. die == unimplemented $FP parity |
|
|
330 | |
|
|
331 | $op[0x00] = ''; # nop |
| 291 | |
332 | |
| 292 | # mov r,r / r,M / M,r |
333 | # mov r,r / r,M / M,r |
| 293 | for my $s (0..7) { |
334 | for my $s (0..7) { |
| 294 | for my $d (0..7) { |
335 | for my $d (0..7) { |
| 295 | $op[0x40 + $d * 8 + $s] = "$reg[$d] = $reg[$s]"; |
336 | $op[0x40 + $d * 8 + $s] = "$reg[$d] = $reg[$s]"; # mov |
| 296 | } |
337 | } |
| 297 | } |
338 | } |
| 298 | |
339 | |
| 299 | $op[0x00] = ''; |
340 | $op[0x76] = 'die "HLT"'; # hlt (mov m,m) |
|
|
341 | |
|
|
342 | # mvi r / M |
|
|
343 | $op[0x06 + $_ * 8] = "$reg[$_] = IMM8" for 0..7; |
| 300 | |
344 | |
| 301 | $op[0x01] = '($B, $C) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi |
345 | $op[0x01] = '($B, $C) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi |
| 302 | $op[0x11] = '($D, $E) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi |
346 | $op[0x11] = '($D, $E) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi |
| 303 | $op[0x21] = '($H, $L) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi |
347 | $op[0x21] = '($H, $L) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi |
| 304 | $op[0x31] = '$SP = IMM16' ; # lxi #d# 0xf000 because of limited stack |
348 | $op[0x31] = '$SP = IMM16' ; # lxi |
| 305 | |
349 | |
| 306 | $op[0x02] = '$M[$B * 256 + $C] = $A'; # stax |
350 | $op[0x02] = '$M[$B * 256 + $C] = $A'; # stax |
| 307 | $op[0x12] = '$M[$D * 256 + $E] = $A'; # stax |
351 | $op[0x12] = '$M[$D * 256 + $E] = $A'; # stax |
| 308 | $op[0x32] = '$M[IMM16 ] = $A'; # sta |
352 | $op[0x32] = '$M[IMM16 ] = $A'; # sta |
| 309 | |
353 | |
|
|
354 | $op[0x0a] = '$A = $M[$B * 256 + $C]'; # ldax b |
|
|
355 | $op[0x1a] = '$A = $M[$D * 256 + $E]'; # ldax d |
|
|
356 | $op[0x3a] = '$A = $M[IMM16]'; # lda |
|
|
357 | |
|
|
358 | $op[0x22] = '($M[IMM16], $M[IMM16 + 1]) = ($L, $H)'; # shld |
|
|
359 | $op[0x2a] = '($L, $H) = ($M[IMM16], $M[IMM16 + 1])'; # lhld |
|
|
360 | |
| 310 | sub inxdcx($$$) { |
361 | sub inxdcx($$$) { |
| 311 | $x = ($_[0] * 256 + $_[1] + $_[2]) & 0xffff; |
362 | $x = $_[0] * 256 + $_[1] + $_[2]; |
| 312 | $_[0] = $x >> 8; |
363 | ($_[0], $_[1]) = (($x >> 8) & 0xff, $x & 0xff); |
| 313 | $_[1] = $x & 0xff; |
|
|
| 314 | } |
364 | } |
| 315 | |
365 | |
| 316 | $op[0x03] = 'inxdcx $B, $C, 1'; # inx |
366 | $op[0x03] = 'inxdcx $B, $C, 1'; # inx |
| 317 | $op[0x13] = 'inxdcx $D, $E, 1'; # inx |
367 | $op[0x13] = 'inxdcx $D, $E, 1'; # inx |
| 318 | $op[0x23] = 'inxdcx $H, $L, 1'; # inx |
368 | $op[0x23] = 'inxdcx $H, $L, 1'; # inx |
| … | |
… | |
| 321 | $op[0x1b] = 'inxdcx $D, $E, -1'; # dcx |
371 | $op[0x1b] = 'inxdcx $D, $E, -1'; # dcx |
| 322 | $op[0x2b] = 'inxdcx $H, $L, -1'; # dcx |
372 | $op[0x2b] = 'inxdcx $H, $L, -1'; # dcx |
| 323 | $op[0x3b] = '--$SP' ; # dcx |
373 | $op[0x3b] = '--$SP' ; # dcx |
| 324 | |
374 | |
| 325 | # "no carry" doesn't seem to be needed for vt100 - optimize? |
375 | # "no carry" doesn't seem to be needed for vt100 - optimize? |
| 326 | $op[0x04 + $_ * 8] = "$reg[$_] = sf_nc $reg[$_] + 1" for 0..7; # inr |
|
|
| 327 | $op[0x05 + $_ * 8] = "$reg[$_] = sf_nc $reg[$_] - 1" for 0..7; # dcr |
|
|
| 328 | |
|
|
| 329 | # mvi r / M |
|
|
| 330 | $op[0x06 + $_ * 8] = "$reg[$_] = IMM8" for 0..7; |
376 | $op[0x04 + $_ * 8] = "sf_nc ++$reg[$_]" for 0..7; # inr |
|
|
377 | $op[0x05 + $_ * 8] = "sf_nc --$reg[$_]" for 0..7; # dcr |
|
|
378 | |
|
|
379 | $op[0x07] = ' $FC = $A & 0x80; $A = (($A << 1) + ($FC && 0x01)) & 0xff '; # rlc |
|
|
380 | $op[0x17] = ' ($FC, $A) = ($A & 0x80, (($A << 1) + ($FC && 0x01)) & 0xff)'; # ral |
|
|
381 | $op[0x0f] = ' $FC = $A & 0x01; $A = ($A >> 1) | ($FC && 0x80) '; # rrc |
|
|
382 | $op[0x1f] = ' ($FC, $A) = ($A & 0x01, ($A >> 1) | ($FC && 0x80))'; # rar |
| 331 | |
383 | |
| 332 | # getting this insn wrong (its the only 16 bit insn to modify flags) |
384 | # getting this insn wrong (its the only 16 bit insn to modify flags) |
| 333 | # wasted three of my best days with mindless vt102 rom reverse engineering |
385 | # wasted three of my best days with mindless vt102 rom reverse engineering |
| 334 | sub dad { |
386 | sub dad { |
| 335 | $x = $H * 256 + $L + $_[0]; |
387 | $x = $H * 256 + $L + $_[0]; |
| … | |
… | |
| 341 | $op[0x09] = 'dad $B * 256 + $C'; # dad |
393 | $op[0x09] = 'dad $B * 256 + $C'; # dad |
| 342 | $op[0x19] = 'dad $D * 256 + $E'; # dad |
394 | $op[0x19] = 'dad $D * 256 + $E'; # dad |
| 343 | $op[0x29] = 'dad $H * 256 + $L'; # dad |
395 | $op[0x29] = 'dad $H * 256 + $L'; # dad |
| 344 | $op[0x39] = 'dad $SP '; # dad |
396 | $op[0x39] = 'dad $SP '; # dad |
| 345 | |
397 | |
| 346 | $op[0x07] = ' $FC = $A >> 7; $A = ($A * 2 + $FC) & 0xff '; # rlc |
398 | $op[0x2f] = '$A ^= 0xff'; # cma |
| 347 | $op[0x17] = ' ($FC, $A) = ($A >> 7, ($A * 2 + $FC) & 0xff)'; # ral |
|
|
| 348 | |
399 | |
| 349 | $op[0x0f] = ' $FC = $A & 1; $A = ($A >> 1) | ($FC && 0x80) '; # rrc |
400 | $op[0x80 + $_] = 'sf $A += + ' . $reg[$_] for 0..7; # add |
| 350 | $op[0x1f] = ' ($FC, $A) = ($A & 1, ($A >> 1) | ($FC && 0x80))'; # rar |
401 | $op[0x88 + $_] = 'sf $A += ($FC && 1) + ' . $reg[$_] for 0..7; # adc |
|
|
402 | $op[0x90 + $_] = 'sf $A -= + ' . $reg[$_] for 0..7; # sub |
|
|
403 | $op[0x98 + $_] = 'sf $A -= ($FC && 1) + ' . $reg[$_] for 0..7; # sbb |
|
|
404 | $op[0xa0 + $_] = 'sf8 $A &= ' . $reg[$_] for 0..7; # ana |
|
|
405 | $op[0xa8 + $_] = 'sf8 $A ^= ' . $reg[$_] for 0..7; # xra |
|
|
406 | $op[0xb0 + $_] = 'sf8 $A |= ' . $reg[$_] for 0..7; # ora |
|
|
407 | $op[0xb8 + $_] = 'sf $x = $A - ' . $reg[$_] for 0..7; # cmp |
|
|
408 | # possible todo: optimize ora a, maybe xra a, possibly ana |
| 351 | |
409 | |
| 352 | $op[0x0a] = '$A = $M[$B * 256 + $C]'; # ldax b |
410 | $op[0xc6] = 'sf $A += IMM8'; # adi |
| 353 | $op[0x1a] = '$A = $M[$D * 256 + $E]'; # ldax d |
411 | $op[0xd6] = 'sf $A -= IMM8'; # sui |
| 354 | $op[0x3a] = '$A = $M[IMM16]'; # lda |
412 | $op[0xe6] = 'sf8 $A &= IMM8'; # ani |
|
|
413 | $op[0xee] = 'sf8 $A ^= IMM8'; # xri |
|
|
414 | $op[0xf6] = 'sf8 $A |= IMM8'; # ori |
|
|
415 | $op[0xfe] = 'sf $A - IMM8'; # cpi |
|
|
416 | # ce ACI NYI, apparently unused |
|
|
417 | # de SBI NYI, apparently unused |
| 355 | |
418 | |
|
|
419 | $op[0xc5] = 'PUSH $B; PUSH $C'; |
|
|
420 | $op[0xd5] = 'PUSH $D; PUSH $E'; |
|
|
421 | $op[0xe5] = 'PUSH $H; PUSH $L'; |
|
|
422 | $op[0xf5] = 'PUSH $A; PUSH +($FS && 0x80) | ($FZ && 0x40) | ($FA && 0x10) | ($FP && 0x04) | ($FC && 0x01)'; # psw |
|
|
423 | |
|
|
424 | $op[0xc1] = '($C, $B) = (POP, POP)'; # pop |
|
|
425 | $op[0xd1] = '($E, $D) = (POP, POP)'; # pop |
|
|
426 | $op[0xe1] = '($L, $H) = (POP, POP)'; # pop |
|
|
427 | $op[0xf1] = '($x, $A) = (POP, POP); ($FS, $FZ, $FA, $FP, $FC) = ($x & 0x80, $x & 0x40, $x & 0x10, $x & 0x04, $x & 0x01)'; # pop psw |
|
|
428 | |
|
|
429 | $op[0xc2 + $_ * 8] = 'BRA IMM16 if ' . $cc[$_] for 0..7; # jcc |
|
|
430 | $op[0xc3] = 'JMP IMM16'; # jmp |
|
|
431 | |
|
|
432 | $op[0xc4 + $_ * 8] = '(PUSH PC >> 8), (PUSH PC & 0xff), (BRA IMM16) if ' . $cc[$_] for 0..7; # ccc |
|
|
433 | $op[0xcd] = '(PUSH PC >> 8), (PUSH PC & 0xff), (BRA IMM16)'; # call |
|
|
434 | |
|
|
435 | $op[0xc0 + $_ * 8] = 'BRA POP + POP * 256 if ' . $cc[$_] for 0..7; # rcc |
|
|
436 | $op[0xc9] = 'JMP POP + POP * 256'; # ret |
|
|
437 | |
|
|
438 | $op[0xc7 + $_ * 8] = "JMP $_ * 8" for 0..7; # rst |
|
|
439 | |
|
|
440 | $op[0xe9] = 'JMP $H * 256 + $L'; # pchl |
|
|
441 | # f9 SPHL NYI, apparently unused |
|
|
442 | |
|
|
443 | $op[0x37] = '$FC = 1 '; # stc |
|
|
444 | $op[0x3f] = '$FC = !$FC'; # cmc |
|
|
445 | |
|
|
446 | $op[0xd3] = 'OUT'; # out |
|
|
447 | $op[0xdb] = 'IN'; # in |
|
|
448 | |
|
|
449 | $op[0xeb] = '($D, $E, $H, $L) = ($H, $L, $D, $E)'; # xchg |
|
|
450 | |
|
|
451 | # e3 xthl NYI # @ 917b in e69, hl <-> (sp) |
|
|
452 | |
| 356 | $op[0x20] = '$A = $INTPEND * 16 + $INTMASK + ($IFF && 8)'; # rim (incomplete) |
453 | $op[0x20] = '$A = $INTPEND * 16 + $INTMASK + ($IFF && 8)'; # rim (8085, incomplete) |
| 357 | $op[0x30] = '$INTMASK = $A & 7 if $A & 8'; # sim (incomplete) |
454 | $op[0x30] = '$INTMASK = $A & 7 if $A & 8'; # sim (8085, incomplete) |
| 358 | |
455 | |
| 359 | $op[0x22] = '($M[IMM16], $M[IMM16 + 1]) = ($L, $H)'; # shld |
456 | $op[0xf3] = '$IFF = 0'; # di |
| 360 | $op[0x2a] = '($L, $H) = ($M[IMM16], $M[IMM16 + 1])'; # lhld |
457 | $op[0xfb] = '$IFF = 1'; # ei |
| 361 | |
458 | |
| 362 | # yeah, the fucking setup screens actually use daa... |
459 | # yeah, the fucking setup screen actually uses daa... |
| 363 | $op[0x27] = ' |
460 | $op[0x27] = ' |
| 364 | my ($h, $l); |
461 | my ($h, $l); |
| 365 | |
462 | |
| 366 | ($h, $l) = ($A >> 4, $A & 15); |
463 | ($h, $l) = ($A >> 4, $A & 15); |
| 367 | |
464 | |
| 368 | if ($l > 9 || $FA) { |
465 | if ($l > 9 || $FA) { |
| 369 | $A = sf $A + 6; |
466 | sf $A += 6; |
| 370 | ($h, $l) = ($A >> 4, $A & 15); |
467 | ($h, $l) = ($A >> 4, $A & 15); |
| 371 | } |
468 | } |
| 372 | |
469 | |
| 373 | if ($h > 9 || $FC) { |
470 | if ($h > 9 || $FC) { |
| 374 | $h += 6; |
471 | $h += 6; |
| 375 | $A = ($h * 16 + $l) & 0xff; |
472 | $A = ($h * 16 + $l) & 0xff; |
| 376 | } |
473 | } |
| 377 | '; # daa, almost certainly borked, also, acarry not set by sf |
474 | '; # daa, almost certainly borked, also, acarry not set by sf |
| 378 | |
475 | |
| 379 | $op[0x2f] = '$A ^= 0xff'; # cma |
|
|
| 380 | |
|
|
| 381 | $op[0x37] = '$FC = 1 '; # stc |
|
|
| 382 | $op[0x3f] = '$FC = !$FC'; # cmc |
|
|
| 383 | |
|
|
| 384 | $op[0x76] = 'die "HLT"'; # hlt |
|
|
| 385 | |
|
|
| 386 | $op[0x80 + $_] = '$A = sf $A + ' . $reg[$_] for 0..7; # add |
|
|
| 387 | $op[0x88 + $_] = '$A = sf $A + $FC + ' . $reg[$_] for 0..7; # adc |
|
|
| 388 | $op[0x90 + $_] = '$A = sf $A - ' . $reg[$_] for 0..7; # sub |
|
|
| 389 | $op[0x98 + $_] = '$A = sf $A - $FC - ' . $reg[$_] for 0..7; # sbb |
|
|
| 390 | $op[0xa0 + $_] = '$A = sf $A & ' . $reg[$_] for 0..7; # ana |
|
|
| 391 | $op[0xa8 + $_] = '$A = sf $A ^ ' . $reg[$_] for 0..7; # xra |
|
|
| 392 | $op[0xb0 + $_] = '$A = sf $A | ' . $reg[$_] for 0..7; # ora |
|
|
| 393 | $op[0xb8 + $_] = ' sf $A - ' . $reg[$_] for 0..7; # cmp |
|
|
| 394 | # possible todo: optimize ora a, maybe xra a |
|
|
| 395 | |
|
|
| 396 | $op[0xc6 + $_] = '$A = sf $A + IMM8'; # adi |
|
|
| 397 | $op[0xd6 + $_] = '$A = sf $A - IMM8'; # sui |
|
|
| 398 | $op[0xe6 + $_] = '$A = sf $A & IMM8'; # ani |
|
|
| 399 | $op[0xee + $_] = '$A = sf $A ^ IMM8'; # xri |
|
|
| 400 | $op[0xf6 + $_] = '$A = sf $A | IMM8'; # ori |
|
|
| 401 | $op[0xfe + $_] = ' sf $A - IMM8'; # cpi |
|
|
| 402 | |
|
|
| 403 | $op[0xc1] = '($C, $B) = (POP, POP)'; # pop |
|
|
| 404 | $op[0xd1] = '($E, $D) = (POP, POP)'; # pop |
|
|
| 405 | $op[0xe1] = '($L, $H) = (POP, POP)'; # pop |
|
|
| 406 | $op[0xf1] = '($x, $A) = (POP, POP); ($FS, $FZ, $FA, $FP, $FC) = (!!($x & 0x80), !!($x & 0x40), !!($x & 0x10), !!($x & 0x04), !!($x & 0x01))'; # pop psw |
|
|
| 407 | |
|
|
| 408 | $op[0xeb] = '($D, $E, $H, $L) = ($H, $L, $D, $E)'; # xchg |
|
|
| 409 | |
|
|
| 410 | $op[0xc2 + $_ * 8] = 'BRA IMM16 ' . $cc[$_] for 0..7; # jcc |
|
|
| 411 | $op[0xc3] = 'JMP IMM16'; # jmp |
|
|
| 412 | |
|
|
| 413 | $op[0xc4 + $_ * 8] = '(PUSH PC >> 8), (PUSH PC & 0xff), (BRA IMM16) ' . $cc[$_] for 0..7; # ccc |
|
|
| 414 | $op[0xcd] = '(PUSH PC >> 8), (PUSH PC & 0xff), (BRA IMM16)'; # call |
|
|
| 415 | |
|
|
| 416 | $op[0xc7 + $_ * 8] = "JMP $_ * 8" for 0..7; # rst |
|
|
| 417 | |
|
|
| 418 | $op[0xc0 + $_ * 8] = 'BRA POP + POP * 256 ' . $cc[$_] for 0..7; # rcc |
|
|
| 419 | $op[0xc9] = 'JMP POP + POP * 256'; # ret |
|
|
| 420 | |
|
|
| 421 | $op[0xc5] = 'PUSH $B; PUSH $C'; |
|
|
| 422 | $op[0xd5] = 'PUSH $D; PUSH $E'; |
|
|
| 423 | $op[0xe5] = 'PUSH $H; PUSH $L'; |
|
|
| 424 | $op[0xf5] = 'PUSH $A; PUSH +($FS && 0x80) | ($FZ && 0x40) | ($FA && 0x10) | ($FP && 0x04) | ($FC && 0x01)'; # psw |
|
|
| 425 | |
|
|
| 426 | $op[0xd3] = 'OUT'; # out |
|
|
| 427 | $op[0xdb] = 'IN'; # in |
|
|
| 428 | |
|
|
| 429 | # e3 xthl @ 917b, hl <-> (sp) |
|
|
| 430 | |
|
|
| 431 | $op[0xe9] = 'JMP $H * 256 + $L'; # pchl |
|
|
| 432 | |
|
|
| 433 | $op[0xf3] = '$IFF = 0'; # DI |
|
|
| 434 | $op[0xfb] = '$IFF = 1'; # EI |
|
|
| 435 | |
|
|
| 436 | @ops = @op; # for debugging #d# |
|
|
| 437 | |
|
|
| 438 | ############################################################################# |
476 | ############################################################################# |
|
|
477 | # debug |
| 439 | |
478 | |
| 440 | # print cpu status, for debugging |
479 | # print cpu status, for debugging |
| 441 | sub status { |
480 | sub status { |
| 442 | my $PC = shift || $PC; |
481 | my $PC = shift || $PC; |
| 443 | |
482 | |
| … | |
… | |
| 447 | ($FZ ? "1" : "0") |
486 | ($FZ ? "1" : "0") |
| 448 | . ($FS ? "1" : "0") |
487 | . ($FS ? "1" : "0") |
| 449 | . ($FC ? "1" : "0") |
488 | . ($FC ? "1" : "0") |
| 450 | . ($FA ? "1" : "0") |
489 | . ($FA ? "1" : "0") |
| 451 | . ($FP ? "1" : "0"), |
490 | . ($FP ? "1" : "0"), |
| 452 | $M[$PC], $ops[$M[$PC]]; |
491 | $M[$PC], $op[$M[$PC]]; |
| 453 | } |
492 | } |
| 454 | |
493 | |
| 455 | ############################################################################# |
494 | ############################################################################# |
|
|
495 | # video emulation |
| 456 | |
496 | |
| 457 | my @chr = ( |
497 | binmode STDOUT; |
| 458 | " ", |
498 | |
| 459 | "\x{29eb}", |
499 | my @CHARMAP = ( # acschars / chars 0..31 |
| 460 | "\x{2592}", |
500 | " " , "\x{29eb}", "\x{2592}", "\x{2409}", |
| 461 | "\x{2409}", |
501 | "\x{240c}", "\x{240d}", "\x{240a}", "\x{00b0}", |
| 462 | "\x{240c}", |
502 | "\x{00b1}", "\x{2424}", "\x{240b}", "\x{2518}", |
| 463 | "\x{240d}", |
503 | "\x{2510}", "\x{250c}", "\x{2514}", "\x{253c}", |
| 464 | "\x{240a}", |
504 | "\x{23ba}", "\x{23bb}", "\x{2500}", "\x{23bc}", |
| 465 | "\x{00b0}", |
505 | "\x{23bd}", "\x{251c}", "\x{2524}", "\x{2534}", |
| 466 | "\x{00b1}", |
506 | "\x{252c}", "\x{2502}", "\x{2264}", "\x{2265}", |
| 467 | "\x{2424}", |
507 | "\x{03c0}", "\x{2260}", "\x{00a3}", "\x{00b7}", |
| 468 | "\x{240b}", |
|
|
| 469 | "\x{2518}", |
|
|
| 470 | "\x{2510}", |
|
|
| 471 | "\x{250c}", |
|
|
| 472 | "\x{2514}", |
|
|
| 473 | "\x{253c}", |
|
|
| 474 | "\x{23ba}", |
|
|
| 475 | "\x{23bb}", |
|
|
| 476 | "\x{2500}", |
|
|
| 477 | "\x{23bc}", |
|
|
| 478 | "\x{23bd}", |
|
|
| 479 | "\x{251c}", |
|
|
| 480 | "\x{2524}", |
|
|
| 481 | "\x{2534}", |
|
|
| 482 | "\x{252c}", |
|
|
| 483 | "\x{2502}", |
|
|
| 484 | "\x{2264}", |
|
|
| 485 | "\x{2265}", |
|
|
| 486 | "\x{03c0}", |
|
|
| 487 | "\x{2260}", |
|
|
| 488 | "\x{00a3}", |
|
|
| 489 | "\x{00b7}", |
|
|
| 490 | (map chr, 0x020 .. 0x7e), |
508 | (map chr, 0x020 .. 0x7e), |
| 491 | "?", |
|
|
| 492 | ); |
509 | ); |
| 493 | |
510 | |
| 494 | utf8::encode $_ for @chr; |
511 | utf8::encode $_ for @CHARMAP; |
| 495 | |
512 | |
| 496 | sub prscr { |
513 | my @SGR; # sgr sequences for attributes |
|
|
514 | |
|
|
515 | for (0x00 .. 0xff) { |
|
|
516 | my $sgr = ""; |
|
|
517 | |
|
|
518 | # ~1 sgr 5 blink |
|
|
519 | # ~2 sgr 4 underline |
|
|
520 | # ~4 sgr 1 bold |
|
|
521 | # 0x80 in attr, sgr 7, reversed |
|
|
522 | |
|
|
523 | $sgr .= ";5" unless $_ & 0x01; |
|
|
524 | $sgr .= ";4" unless $_ & 0x02; |
|
|
525 | $sgr .= ";1" unless $_ & 0x04; |
|
|
526 | $sgr .= ";7" if $_ & 0x80; |
|
|
527 | |
|
|
528 | $SGR[$_] = "\e[${sgr}m"; |
|
|
529 | } |
|
|
530 | |
|
|
531 | my @LED = $VT102 |
|
|
532 | ? qw(L1 INSERT DSR CTS LOCKED LOCAL SCAN BEEP) |
|
|
533 | : qw(L4 L3 L2 L1 LOCKED LOCAL SCAN BEEP); |
|
|
534 | |
|
|
535 | my $CURSOR_IS_ON; |
|
|
536 | |
|
|
537 | # display screen |
|
|
538 | sub display { |
|
|
539 | # this is for the powersave mode - check whether the cursor is on here, |
|
|
540 | # and only allow powersave later when it was on the last display time |
|
|
541 | $CURSOR_IS_ON = $M[$VT102 ? 0x207b : 0x21ba]; |
|
|
542 | |
|
|
543 | my $leds = join " ", map $KSTATUS & 2**$_ ? "\e[7m$LED[$_]\e[m" : "$LED[$_]", reverse 0 .. $#LED; |
|
|
544 | |
|
|
545 | my $scr = sprintf "\e[H--- LED [ %s ] CLK %d\e[K\n", $leds, $CLK; |
|
|
546 | |
|
|
547 | $scr .= "\e[?5" . ($DC11_REVERSE ? "h" : "l"); |
|
|
548 | |
| 497 | my $i = 0x2000; |
549 | my $i = 0x2000; |
| 498 | |
550 | |
| 499 | 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; |
|
|
| 500 | |
|
|
| 501 | line: |
551 | line: |
| 502 | for my $y (0 .. 25) { |
552 | for my $y (0 .. 25) { # ntsc, two vblank delay lines, up to 24 text lines |
|
|
553 | my $prev_attr; |
|
|
554 | my ($c, $attr); # declare here for speedup |
|
|
555 | |
| 503 | $scr .= sprintf "%2d |", ++$y; |
556 | $scr .= sprintf "%2d \xe2\x94\x82", $y; |
| 504 | |
557 | |
| 505 | for (0..140) { |
558 | for (0..139) { |
| 506 | my $c = $M[$i++]; |
559 | $c = $M[$i]; |
| 507 | |
|
|
| 508 | # printf "%04x %02x\n", $i-1,$c; |
|
|
| 509 | |
560 | |
| 510 | if ($c == 0x7f) { # also 0xff, but the firmware avoids that |
561 | if ($c == 0x7f) { # also 0xff, but the firmware avoids that |
| 511 | $scr .= "|\x1b[K\n"; |
562 | $scr .= "\e[m\xe2\x94\x82\e[K\n"; |
| 512 | |
563 | |
| 513 | my $a1 = $M[$i++]; |
564 | my $a1 = $M[$i + 1]; |
| 514 | my $a0 = $M[$i++]; |
565 | my $a0 = $M[$i + 2]; |
| 515 | |
566 | |
| 516 | $i = 0x2000 + (($a1 * 256 + $a0) & 0xfff); |
567 | $i = 0x2000 + (($a1 * 256 + $a0) & 0xfff); |
| 517 | |
568 | |
| 518 | next line; |
569 | next line; |
| 519 | } |
570 | } |
| 520 | |
571 | |
| 521 | $scr .= "\x1b[7m" if $c & 0x80; |
572 | $scr .= $SGR[$prev_attr = $attr] |
| 522 | $scr .= $chr[$c & 0x7f] // sprintf "[%02x]", $c & 0x7f; |
573 | if $prev_attr != ($attr = ($M[$i++ + 0x1000] & 15) | ($c & 0x80)); |
| 523 | $scr .= "\x1b[m" if $c & 0x80; |
574 | |
|
|
575 | $scr .= $CHARMAP[$c & 0x7f]; |
| 524 | } |
576 | } |
| 525 | |
577 | |
| 526 | $scr .= "\x1b[K\noverflow\x1b[K\n"; |
578 | $scr .= "\e[K\nvideo overflow\e[K\n"; |
| 527 | last; |
579 | last; |
| 528 | } |
580 | } |
| 529 | |
581 | |
| 530 | if (0) { |
|
|
| 531 | $scr .= "\x1b[K\n"; |
|
|
| 532 | for my $o (0x200 .. 0x232) { |
|
|
| 533 | $scr .= sprintf "%04x:", $o * 16; |
|
|
| 534 | for (0..15) { |
|
|
| 535 | $scr .= sprintf " %02x", $M[$o * 16 + $_]; |
|
|
| 536 | } |
|
|
| 537 | $scr .= "\x1b[K\n"; |
|
|
| 538 | } |
|
|
| 539 | } |
|
|
| 540 | |
|
|
| 541 | $scr .= "\x1b[J"; |
582 | $scr .= "\e[m\e[J"; |
| 542 | |
583 | |
| 543 | syswrite STDOUT, $scr; |
584 | syswrite STDOUT, $scr; |
| 544 | } |
585 | } |
| 545 | |
586 | |
| 546 | ############################################################################# |
587 | ############################################################################# |
|
|
588 | # keyboard handling |
| 547 | |
589 | |
| 548 | if (@ARGV) { |
590 | # 0x080 shift, 0x100 ctrl |
| 549 | require IO::Pty; |
591 | my %KEYMAP = ( |
| 550 | $PTY = IO::Pty->new; |
592 | "\t" => 0x3a, |
|
|
593 | "\r" => 0x64, |
|
|
594 | "\n" => 0x44, |
|
|
595 | |
|
|
596 | "\x00" => 0x77 | 0x100, # CTRL-SPACE |
|
|
597 | "\x1c" => 0x45 | 0x100, # CTRL-\ |
|
|
598 | "\x1d" => 0x14 | 0x100, # CTRL-] |
|
|
599 | "\x1e" => 0x24 | 0x100, # CTRL-~ |
|
|
600 | "\x1f" => 0x75 | 0x100, # CTRL-? |
|
|
601 | |
|
|
602 | # hardcoded rxvt keys |
|
|
603 | "\e" => 0x2a, # ESC |
|
|
604 | "\e[2~" => 0x79 | 0x100, # CTRL-C (insert) |
|
|
605 | "\e[3~" => 0x03, # DC |
|
|
606 | "\e[5~" => 0x7e, # CAPS LOCK (prior) |
|
|
607 | "\e[6~" => 0x6a, # NO SCROLL (next) |
|
|
608 | "\e[A" => 0x30, # UP |
|
|
609 | "\e[B" => 0x22, # DOWN |
|
|
610 | "\e[C" => 0x10, # RIGHT |
|
|
611 | "\e[D" => 0x20, # LEFT |
|
|
612 | "\e[a" => 0x30 | 0x080, # UP |
|
|
613 | "\e[b" => 0x22 | 0x080, # DOWN |
|
|
614 | "\e[c" => 0x10 | 0x080, # RIGHT |
|
|
615 | "\e[d" => 0x20 | 0x080, # LEFT |
|
|
616 | "\e[7~" => 0x7b, # SETUP (home) |
|
|
617 | "\e[8~" => 0x23, # BREAK (end) |
|
|
618 | "\e[8\$" => 0x23 | 0x080, # SHIFT BREAK / DISCONNECT (shift-end) |
|
|
619 | "\x7f" => 0x33, # BACKSPACE |
|
|
620 | |
|
|
621 | "\e[11~" => 0x32, # PF1 |
|
|
622 | "\e[12~" => 0x42, # PF2 |
|
|
623 | "\e[13~" => 0x31, # PF3 |
|
|
624 | "\e[14~" => 0x41, # PF4 |
|
|
625 | ); |
| 551 | |
626 | |
| 552 | my $slave = $PTY->slave; |
627 | @KEYMAP{map chr, 0x20 .. 0x40, 0x5b .. 0x7e} = unpack "C*", pack "H*", |
|
|
628 | "779ad5a9a8b8a755a6b5b6b466256575" . "351a3929283837273626d656e634e5f5" . "b9" # 20..40 |
|
|
629 | . "154514b7a5" . "244a6879591949485816574746766706" . "050a185a0817780969077a95c594a4"; # 5b..7e |
| 553 | |
630 | |
| 554 | $PTY->set_winsize (24, 80); |
631 | $KEYMAP{"\x1f" & $_} ||= $KEYMAP{$_} | 0x100 for "a" .. "z"; # ctrl |
|
|
632 | $KEYMAP{"\x20" ^ $_} ||= $KEYMAP{$_} | 0x080 for "a" .. "z"; # shift |
| 555 | |
633 | |
| 556 | unless (fork) { |
634 | my $KEYMATCH = join "|", map quotemeta, reverse sort keys %KEYMAP; |
| 557 | $ENV{TERM} = $VT102 ? "vt102" : "vt100"; |
635 | $KEYMATCH = qr{^($KEYMATCH)}s; |
| 558 | |
636 | |
| 559 | close $PTY; |
637 | my %KMOD; # currently pressed modifier keys |
| 560 | |
638 | |
| 561 | open STDIN , "<&", $slave; |
639 | sub key { |
| 562 | open STDOUT, ">&", $slave; |
640 | my ($key) = @_; |
| 563 | open STDERR, ">&", $slave; |
|
|
| 564 | |
641 | |
| 565 | system "stty ixoff erase ^H"; |
642 | push @KQUEUE, -0x7c if !($key & 0x100) && delete $KMOD{0x7c}; # ctrl-up |
|
|
643 | push @KQUEUE, -0x7d if !($key & 0x080) && delete $KMOD{0x7d}; # shift-up |
| 566 | |
644 | |
| 567 | $PTY->make_slave_controlling_terminal; |
645 | push @KQUEUE, 0x7c if $key & 0x100 && !$KMOD{0x7c}++; # ctrl-down |
| 568 | $PTY->close_slave; |
646 | push @KQUEUE, 0x7d if $key & 0x080 && !$KMOD{0x7d}++; # shift-down |
| 569 | |
647 | |
| 570 | exec @ARGV; |
648 | $key &= 0x7f; |
| 571 | } |
649 | push @KQUEUE, $key, -$key; |
| 572 | |
|
|
| 573 | $PTY->close_slave; |
|
|
| 574 | |
|
|
| 575 | } else { |
|
|
| 576 | open $PTY, "</dev/null" or die;#d |
|
|
| 577 | } |
650 | } |
| 578 | |
651 | |
| 579 | ############################################################################# |
652 | my $STDIN_BUF; |
| 580 | |
653 | |
|
|
654 | sub stdin_parse { |
|
|
655 | key $KEYMAP{$1} |
|
|
656 | while $STDIN_BUF =~ s/$KEYMATCH//; |
|
|
657 | |
|
|
658 | # skip input we can't decipher |
|
|
659 | substr $STDIN_BUF, 0, 1, ""; |
|
|
660 | } |
|
|
661 | |
|
|
662 | if ($KBD) { |
|
|
663 | system "stty -icanon -icrnl -inlcr -echo min 1 time 0"; # -isig |
|
|
664 | eval q{ sub END { system "stty sane" } }; |
|
|
665 | $SIG{INT} = $SIG{TERM} = $SIG{QUIT} = sub { exit 1 }; |
|
|
666 | } |
|
|
667 | |
|
|
668 | ############################################################################# |
| 581 | # initial key input, to set up online mode etc. |
669 | # initial key input, to set up online mode etc. |
|
|
670 | # could be done via nvram defaults |
|
|
671 | |
| 582 | @KQUEUE = ( |
672 | @KQUEUE = ( |
| 583 | 0x7b, -0x7b, # setup |
673 | 0x7b, -0x7b, # setup |
| 584 | 0, # delay |
674 | 0, # delay |
| 585 | 0x28, -0x28, # 4, toggle local/online |
675 | 0x28, -0x28, # 4, toggle local/online |
| 586 | 0x38, -0x38, # 5, setup b |
676 | 0x38, -0x38, # 5, setup b |
| … | |
… | |
| 597 | 0x37, -0x37, # 6 toggle wrap around |
687 | 0x37, -0x37, # 6 toggle wrap around |
| 598 | 0x7b, -0x7b, # leave setup |
688 | 0x7b, -0x7b, # leave setup |
| 599 | ); |
689 | ); |
| 600 | |
690 | |
| 601 | ############################################################################# |
691 | ############################################################################# |
|
|
692 | # process/pty management |
| 602 | |
693 | |
| 603 | # 0x80 shift, 0x100 ctrl, 0x200 toggle |
694 | if (1) { |
| 604 | my %KEYMAP = ( |
695 | require IO::Pty; |
| 605 | "\t" => 0x3a, |
696 | $PTY = IO::Pty->new; |
| 606 | "\r" => 0x64, |
|
|
| 607 | "\n" => 0x44, |
|
|
| 608 | |
697 | |
| 609 | # hardcoded rxvt keys |
698 | my $slave = $PTY->slave; |
| 610 | "\e" => 0x2a, # ESC |
|
|
| 611 | "\e[3~" => 0x03, # DC |
|
|
| 612 | "\e[5~" => 0x7e, # CAPS LOCK (prior) |
|
|
| 613 | "\e[6~" => 0x6a, # NO SCROLL (next) |
|
|
| 614 | "\e[A" => 0x30, # UP |
|
|
| 615 | "\e[B" => 0x22, # DOWN |
|
|
| 616 | "\e[C" => 0x10, # RIGHT |
|
|
| 617 | "\e[D" => 0x20, # LEFT |
|
|
| 618 | "\e[a" => 0x30 | 0x080, # UP |
|
|
| 619 | "\e[b" => 0x22 | 0x080, # DOWN |
|
|
| 620 | "\e[c" => 0x10 | 0x080, # RIGHT |
|
|
| 621 | "\e[d" => 0x20 | 0x080, # LEFT |
|
|
| 622 | "\e[7~" => 0x7b, # SETUP (home) |
|
|
| 623 | "\e[8~" => 0x23, # BREAK (end) |
|
|
| 624 | "\e[8\$" => 0x23 | 0x080, # SHIFT BREAK / DISCONNECT (shift-end) |
|
|
| 625 | "\x7f" => 0x33, # BACKSPACE |
|
|
| 626 | |
699 | |
| 627 | "\e[11~" => 0x32, # F1 |
700 | $PTY->set_winsize (24, 80); |
| 628 | "\e[11~" => 0x42, # F2 |
|
|
| 629 | "\e[11~" => 0x31, # F3 |
|
|
| 630 | "\e[11~" => 0x41, # F4 |
|
|
| 631 | ); |
|
|
| 632 | |
701 | |
| 633 | @KEYMAP{map chr, 0x20..0x40} = unpack "C*", pack "H*", |
702 | unless (fork) { |
| 634 | "779ad5a9a8b8a755a6b5b6b466256575" . "351a3929283837273626d656e634e5f5" . "b9"; |
703 | $ENV{LC_ALL} = "C"; |
|
|
704 | $ENV{TERM} = $VT102 ? "vt102" : "vt100"; |
| 635 | |
705 | |
| 636 | @KEYMAP{map chr, 0x5b .. 0x7e} = unpack "C*", pack "H*", |
706 | close $PTY; |
| 637 | "154514b7a5" . "244a6879591949485816574746766706" . "050a185a0817780969077a95c594a4"; |
|
|
| 638 | |
707 | |
| 639 | $KEYMAP{"\x3f" & $_} ||= $KEYMAP{$_} | 0x100 for "a" .. "z"; # ctrl |
708 | open STDIN , "<&", $slave; |
| 640 | $KEYMAP{uc $_} ||= $KEYMAP{$_} | 0x080 for "a" .. "z"; # shift |
709 | open STDOUT, ">&", $slave; |
|
|
710 | open STDERR, ">&", $slave; |
| 641 | |
711 | |
| 642 | my $KEYMATCH = join "|", map quotemeta, reverse sort keys %KEYMAP; |
712 | system "stty ixoff erase ^H"; |
| 643 | $KEYMATCH = qr{^($KEYMATCH)}s; |
|
|
| 644 | |
713 | |
| 645 | sub key { |
714 | $PTY->make_slave_controlling_terminal; |
| 646 | my ($key) = @_; |
715 | $PTY->close_slave; |
| 647 | |
716 | |
| 648 | state %MOD; |
717 | @ARGV = "sh" unless @ARGV; |
|
|
718 | exec @ARGV; |
|
|
719 | } |
| 649 | |
720 | |
| 650 | push @KQUEUE, -0x7c if !($key & 0x100) && delete $MOD{0x7c}; # ctrl-up |
721 | $PTY->close_slave; |
| 651 | push @KQUEUE, -0x7d if !($key & 0x080) && delete $MOD{0x7d}; # shift-up |
722 | } else { |
| 652 | |
723 | open $PTY, "+</dev/null" |
| 653 | push @KQUEUE, 0x7c if $key & 0x100 && !$MOD{0x7c}++; # ctrl-down |
724 | or die "/dev/null: $!"; |
| 654 | push @KQUEUE, 0x7d if $key & 0x080 && !$MOD{0x7d}++; # shift-down |
|
|
| 655 | |
|
|
| 656 | $key &= 0x7f; |
|
|
| 657 | push @KQUEUE, $key, -$key; |
|
|
| 658 | } |
725 | } |
| 659 | |
726 | |
| 660 | my $STDIN_BUF; |
|
|
| 661 | |
|
|
| 662 | sub stdin_parse { |
|
|
| 663 | key $KEYMAP{$1} |
|
|
| 664 | while $STDIN_BUF =~ s/$KEYMATCH//; |
|
|
| 665 | |
|
|
| 666 | # skip input we can't decipher |
|
|
| 667 | substr $STDIN_BUF, 0, 1, ""; |
|
|
| 668 | } |
|
|
| 669 | |
|
|
| 670 | if ($KBD) { |
|
|
| 671 | system "stty -icanon -icrnl -inlcr -echo min 1 time 0"; |
|
|
| 672 | eval q{ sub END { system "stty sane" } }; |
|
|
| 673 | $SIG{INT} = $SIG{TERM} = $SIG{QUIT} = sub { exit 1 }; |
|
|
| 674 | } |
|
|
| 675 | |
|
|
| 676 | ############################################################################# |
727 | ############################################################################# |
|
|
728 | # the actual hardware simulator |
| 677 | |
729 | |
| 678 | my @ICACHE; # compiled instruction cache |
730 | my @ICACHE; # compiled instruction/basic block cache |
| 679 | |
731 | |
|
|
732 | my $POWERSAVE; # powersave counter |
|
|
733 | |
|
|
734 | my $RIN; # libev for the less well-off |
|
|
735 | |
|
|
736 | (vec $RIN, 0, 1) = 1 if $KBD; |
|
|
737 | (vec $RIN, fileno $PTY, 1) = 1 if $PTY; |
|
|
738 | |
| 680 | # the cpu |
739 | # the cpu. |
| 681 | while () { |
740 | while () { |
| 682 | |
|
|
| 683 | # execute extended basic blocks |
741 | # execute an extended basic block |
| 684 | $PC = ($ICACHE[$PC] ||= do { |
742 | $PC = ($ICACHE[$PC] ||= do { |
| 685 | my $pc = $PC; |
743 | my $pc = $PC; |
| 686 | |
744 | |
| 687 | my $insn = ""; |
745 | my $insn = ""; |
| 688 | |
746 | |
| 689 | # the jit compiler |
747 | # the jit compiler |
| 690 | for (0..15) { |
748 | for (0..31) { |
| 691 | |
|
|
| 692 | # optional tracing support |
|
|
| 693 | if (0) { |
|
|
| 694 | $insn .= qq< |
|
|
| 695 | if (\$PRSTATUS) { |
|
|
| 696 | status $pc; |
|
|
| 697 | die unless --\$PRSTATUS; |
|
|
| 698 | } |
|
|
| 699 | >; |
|
|
| 700 | } |
|
|
| 701 | |
|
|
| 702 | my $imm; |
749 | my $imm; |
| 703 | my $op = $op[$M[$pc++]]; |
750 | my $op = $op[$M[$pc++]]; |
| 704 | |
751 | |
| 705 | for ($op) { |
752 | for ($op) { |
| 706 | s/\bPUSH\b/\$M[--\$SP] =/g; # push byte to stack |
753 | s/\bPUSH\b/\$M[--\$SP] =/g; # push byte to stack |
| … | |
… | |
| 711 | |
758 | |
| 712 | s/\bPC\b/$pc/ge; # PC at end of insn |
759 | s/\bPC\b/$pc/ge; # PC at end of insn |
| 713 | s/\bBRA\b/return/g; # conditional jump |
760 | s/\bBRA\b/return/g; # conditional jump |
| 714 | s/\bJMP\b(.*)/$1\x00/sg; # unconditional jump |
761 | s/\bJMP\b(.*)/$1\x00/sg; # unconditional jump |
| 715 | |
762 | |
| 716 | s/\bIN\b/ sprintf "\$A = in_%02x", $M[$pc++]/xge; |
763 | s/\bIN\b/ sprintf "\$A = in_%02x", $M[$pc++]/xge; # in insns call in_HEX |
| 717 | s/\bOUT\b/sprintf "out_%02x \$A ", $M[$pc++]/xge; |
764 | s/\bOUT\b/sprintf "out_%02x \$A ", $M[$pc++]/xge; # out likewise |
| 718 | } |
765 | } |
| 719 | |
766 | |
| 720 | $insn .= "$op;\n"; |
767 | $insn .= "$op;\n"; |
| 721 | } |
768 | } |
| 722 | |
769 | |
| 723 | |
|
|
| 724 | $insn .= "$pc"; |
770 | $insn .= $pc; |
| 725 | $insn =~ s/\x00.*$//s; |
771 | $insn =~ s/\x00.*$//s; |
| 726 | |
772 | |
| 727 | eval "use integer; sub { $insn }" or die "$insn: $@" |
773 | eval "sub { $insn }" or die "$insn: $@" |
| 728 | })->(); |
774 | })->(); |
| 729 | |
775 | |
| 730 | ++$CLK; |
776 | ++$CLK; |
| 731 | |
777 | |
| 732 | #TODO: just check on ret instructions or so |
778 | # things we do from time to time only |
| 733 | # the interrupt logic |
779 | unless ($CLK & 0xf) { |
| 734 | $x = $INTPEND & ~$INTMASK; |
780 | # do I/O |
| 735 | |
781 | |
| 736 | if (($RST || $x) && $IFF) { |
782 | unless ($CLK & 0xfff) { |
|
|
783 | if (select $x = $RIN, undef, undef, $POWERSAVE < 10 ? 0 : $CURSOR_IS_ON && 3600) { |
|
|
784 | |
|
|
785 | # pty/serial I/O |
|
|
786 | if ($PTY && (vec $x, fileno $PTY, 1) && (@PUSARTRECV < 128) && !@KQUEUE) { |
|
|
787 | sysread $PTY, my $buf, 256; |
|
|
788 | |
|
|
789 | # linux don't do cs7 and/or parity anymore, so we need to filter |
|
|
790 | # out xoff characters to avoid freezes. |
|
|
791 | push @PUSARTRECV, grep { ($_ & 0x7f) != 0x13 } unpack "C*", $buf; |
|
|
792 | } |
|
|
793 | |
|
|
794 | # keyboard input |
|
|
795 | if ($KBD && (vec $x, 0, 1)) { |
|
|
796 | # to avoid non-blocking mode on stdin (and stty min 0), we |
|
|
797 | # just read byte-by-byte after a select says there is data. |
|
|
798 | while (select my $rin = "\x01", undef, undef, 0) { |
|
|
799 | sysread STDIN, $STDIN_BUF, 1, length $STDIN_BUF |
|
|
800 | or last; |
|
|
801 | } |
|
|
802 | |
|
|
803 | stdin_parse if length $STDIN_BUF; |
|
|
804 | } |
|
|
805 | |
|
|
806 | $POWERSAVE = 0; # activity |
|
|
807 | } elsif (@PUSARTRECV || @KQUEUE) { |
|
|
808 | $POWERSAVE = 0; |
|
|
809 | } else { |
|
|
810 | ++$POWERSAVE; |
|
|
811 | } |
|
|
812 | } |
|
|
813 | |
|
|
814 | # kick off serial input interrupt quite often |
|
|
815 | $RST |= 2 if @PUSARTRECV && $XON; # VT100, but works on vt102, too (probably not used on real hardware though) |
|
|
816 | #$INTPEND |= 2 if @PUSARTRECV && $XON; # VT102, 6.5 rxrdy |
|
|
817 | |
|
|
818 | # kick off vertical retrace interrupt from time to time |
|
|
819 | unless ($CLK & 0x1ff) { |
|
|
820 | $RST |= 4; # vertical retrace |
|
|
821 | } |
|
|
822 | |
|
|
823 | # handle video hardware |
|
|
824 | unless ($CLK & 0x3fff) { |
|
|
825 | display; |
|
|
826 | } |
|
|
827 | } |
|
|
828 | |
|
|
829 | # the interrupt logic - we only interrupt after basic blocks |
|
|
830 | # which, as a side effect, ensures that we don't interrupt |
|
|
831 | # "ei; ret" sequences and thus reduce the risk of stack overflows. |
|
|
832 | if (($RST || ($INTPEND & ~$INTMASK)) && $IFF) { |
| 737 | # rst 1 kbd data available |
833 | # rst 1 kbd data available |
| 738 | # rst 2 pusart xmit+recv flag |
834 | # rst 2 pusart xmit+recv flag |
| 739 | # rst 4 vertical retrace |
835 | # rst 4 vertical retrace |
| 740 | # 5.5 vt125 mb7 trans ready (serial send?) |
836 | # 5.5 vt125 mb7 trans ready (serial send?) |
| 741 | # 6.5 vt125 mb7 read ready (something modem?) |
837 | # 6.5 vt125 mb7 read ready (something modem?) |
| 742 | # 7.5 vt125 mb7 vblank h(?) |
838 | # 7.5 vt125 mb7 vblank h(?) |
| 743 | # trap vt125 mbi init h(?) |
839 | # trap vt125 mbi init h(?) |
| 744 | my $vec; |
840 | my $vec; |
| 745 | |
841 | |
|
|
842 | my $pend = $INTPEND & ~$INTMASK; |
|
|
843 | |
| 746 | if ($x & 1) { $vec = 0x2c; $INTPEND &= ~1; |
844 | if ($pend & 1) { $vec = 0x2c; $INTPEND &= ~1; |
| 747 | } elsif ($x & 2) { $vec = 0x34; $INTPEND &= ~2; |
845 | } elsif ($pend & 2) { $vec = 0x34; $INTPEND &= ~2; |
| 748 | } elsif ($x & 4) { $vec = 0x3c; $INTPEND &= ~4; |
846 | } elsif ($pend & 4) { $vec = 0x3c; $INTPEND &= ~4; |
| 749 | # } elsif ($RST ) { $vec = $RST * 8; $RST = 0; # for some reason, this breaks vt102 |
847 | # } elsif ($RST ) { $vec = $RST * 8; $RST = 0; # the vt102 firmware doesn't like combined interrupts |
| 750 | } elsif ($RST & 1) { $vec = 0x08; $RST &= ~1; # separate is better for vt102 |
848 | } elsif ($RST & 1) { $vec = 0x08; $RST &= ~1; # separate is better for vt102 |
| 751 | } elsif ($RST & 2) { $vec = 0x10; $RST &= ~2; |
849 | } elsif ($RST & 2) { $vec = 0x10; $RST &= ~2; |
| 752 | } elsif ($RST & 4) { $vec = 0x20; $RST &= ~4; |
850 | } elsif ($RST & 4) { $vec = 0x20; $RST &= ~4; |
| 753 | } else { |
851 | } else { |
| 754 | die; |
852 | die; |
| 755 | } |
853 | } |
| 756 | |
854 | |
|
|
855 | # jump to the interrupt vector |
| 757 | $M[--$SP] = $PC >> 8; |
856 | $M[--$SP] = $PC >> 8; |
| 758 | $M[--$SP] = $PC & 0xff; |
857 | $M[--$SP] = $PC & 0xff; |
| 759 | $PC = $vec; |
858 | $PC = $vec; |
| 760 | |
859 | |
| 761 | $IFF = 0; |
860 | $IFF = 0; |
| 762 | } |
861 | } |
| 763 | |
|
|
| 764 | # things we do from time too time only |
|
|
| 765 | unless ($CLK & 0xf) { |
|
|
| 766 | # do I/O |
|
|
| 767 | |
|
|
| 768 | unless ($CLK & 0x7ff) { |
|
|
| 769 | |
|
|
| 770 | # pty/serial I/O |
|
|
| 771 | unless (@PUSARTRECV || @KQUEUE || !$PTY) { |
|
|
| 772 | my $rin = ""; (vec $rin, fileno $PTY, 1) = 1; |
|
|
| 773 | |
|
|
| 774 | if (select $rin, undef, undef, 0) { |
|
|
| 775 | sysread $PTY, my $buf, 256; |
|
|
| 776 | push @PUSARTRECV, unpack "C*", $buf; |
|
|
| 777 | } |
|
|
| 778 | } |
|
|
| 779 | |
|
|
| 780 | # keyboard input |
|
|
| 781 | if ($KBD) { |
|
|
| 782 | while (select my $rin = "\x01", undef, undef, 0) { |
|
|
| 783 | sysread STDIN, $STDIN_BUF, 1, length $STDIN_BUF |
|
|
| 784 | or last; |
|
|
| 785 | } |
|
|
| 786 | |
|
|
| 787 | stdin_parse if length $STDIN_BUF; |
|
|
| 788 | } |
|
|
| 789 | } |
|
|
| 790 | |
|
|
| 791 | # kick off various interrupts |
|
|
| 792 | |
|
|
| 793 | $RST |= 2 if @PUSARTRECV && $XON; # VT100, but works on vt102, too (probably not used on real hardware though) |
|
|
| 794 | #$INTPEND |= 2 if @PUSARTRECV && $XON; # VT102, 6.5 rxrdy |
|
|
| 795 | |
|
|
| 796 | # kick off vertical retrace form time to time |
|
|
| 797 | unless ($CLK & 0x3ff) { |
|
|
| 798 | $RST |= 4; # vertical retrace |
|
|
| 799 | } |
|
|
| 800 | |
|
|
| 801 | # handle video hardware |
|
|
| 802 | |
|
|
| 803 | unless ($CLK & 0x1fff) { |
|
|
| 804 | prscr; |
|
|
| 805 | } |
|
|
| 806 | } |
|
|
| 807 | } |
862 | } |
|
|
863 | |
|
|
864 | ############################################################################# |
|
|
865 | # roms in the data section + one newline |
|
|
866 | # |
|
|
867 | # vt100 @ 0x0000+0x0800 23-032E2 |
|
|
868 | # vt100 @ 0x0800+0x0800 23-061E2 |
|
|
869 | # vt100 @ 0x1000+0x0800 23-033E2 |
|
|
870 | # vt100 @ 0x1800+0x0800 23-034E2 |
|
|
871 | # |
|
|
872 | # vt102 @ 0x0000+0x2000 23-226E4 |
|
|
873 | # vt102 @ 0x8000+0x2000 23-225E4 |
|
|
874 | # |
|
|
875 | # vt131 @ 0xa000+0x0800 23-280E2 |
|
|
876 | # |
| 808 | |
877 | |
| 809 | __DATA__ |
878 | __DATA__ |
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| 811 | 2!0* w4ʘ> 2! ~î!N ̓/2!! "R !"" |
880 | 2!0* w4ʘ> 2! ~î!N ̓/2!! "R !"" |
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| … | |
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| 916 | |
985 | |
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| 918 | \lkgfa ';jhds
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987 | \lkgfa ';jhds
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| 919 | !O! ,ͳʄmÝ |
988 | !O! ,ͳʄmÝ |
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