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Comparing vt102/vt102 (file contents):
Revision 1.1 by root, Mon Dec 1 14:58:52 2014 UTC vs.
Revision 1.13 by root, Wed Dec 3 02:13:26 2014 UTC

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
8# Software Foundation; either version 3, or (at your option) any later
9# version.
10#
11# vt102 is distributed in the hope that it will be useful, but WITHOUT
12# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14# for more details.
15#
8 16
17# If this file contains embedded ROMs, the above copyright notice does
18# not apply to them.
19
20use strict;
9use common::sense; 21#use common::sense;
10
11$| = 1;
12 22
13my $VT102 = 1; 23my $VT102 = 1;
14my $AVO = $VT102 || 1; 24my $VT131 = 0;
25my $AVO = 1;
15my $KBD = 1; 26my $KBD = 1;
16 27
17############################################################################# 28shift, ($VT102 = 0), ($AVO = 0) if $ARGV[0] =~ /^-?-vt100$/;
29shift, ($VT102 = 0) if $ARGV[0] =~ /^-?-vt100\+avo$/;
30shift if $ARGV[0] =~ /^-?-vt102$/;
31shift, ($VT131 = 1) if $ARGV[0] =~ /^-?-vt131$/;
18 32
19my $PTY; # the pty we allocated, if any 33if ($ARGV[0] =~ /^-/) {
34 die <<EOF;
20 35
36VT102, A VT100/101/102/131 SIMULATOR
37
38Usage:
39
40 $0 [option] [program [args]]
41
42Examples:
43
44 $0 bash
45 $0 telnet towel.blinkenlights.nl
46 $0 curl http://artscene.textfiles.com/vt100/trekvid.vt
47 $0 curl http://artscene.textfiles.com/vt100/surf.vt # in 3d!
48
49Option can be one of:
50
51 --vt100
52 --vt100+avo
53 --vt102
54 --vt131
55
56Non-obvious special keys are:
57
58 SET UP Home
59 BACKSPACE Rubout
60 CAPS LOCK Prior/PgUp
61 NO SCROLL Next/PgDown
62 BREAK End
63
64Set-Up Guide:
65
66 http://vt100.net/docs/vt102-ug/chapter3.html#S3.6
67
68Author:
69
70 Marc Lehmann <vt102\@schmorp.de>
71
72EOF
73}
74
75#############################################################################
76# ROM/hardware init
77
21my $ROM = do { 78my $ROMS = do {
22 binmode DATA; 79 binmode DATA;
23 local $/; 80 local $/;
24 <DATA> 81 <DATA>
25}; 82};
26 83
270x6001 == length $ROM or die "corrupted rom image"; 840x6801 == length $ROMS or die "corrupted rom image";
28 85
29binmode STDOUT; 86binmode STDOUT;
30 87
31my @M = (0xff) x 65536; # main memory, = (0xff) x 65536; 88my @M = (0xff) x 65536; # main memory, = (0xff) x 65536;
32 89
33# populate mem with rom contents 90# populate mem with rom contents
34if ($VT102) { 91if ($VT102) {
35 @M[0x0000 .. 0x1fff] = unpack "C*", substr $ROM, 0x2000, 0x2000; 92 @M[0x0000 .. 0x1fff] = unpack "C*", substr $ROMS, 0x2000, 0x2000;
36 @M[0x8000 .. 0x9fff] = unpack "C*", substr $ROM, 0x4000, 0x2000; 93 @M[0x8000 .. 0x9fff] = unpack "C*", substr $ROMS, 0x4000, 0x2000;
94 @M[0xa000 .. 0xa7ff] = unpack "C*", substr $ROMS, 0x6000, 0x0800 if $VT131;
37} else { 95} else {
38 @M[0x0000 .. 0x1fff] = unpack "C*", substr $ROM, 0x0000, 0x2000; 96 @M[0x0000 .. 0x1fff] = unpack "C*", substr $ROMS, 0x0000, 0x2000;
39} 97}
40 98
41############################################################################# 99#############################################################################
100# 8085 CPU registers and I/O support
42 101
43my $PRSTATUS = 0; 102my $PTY; # the pty we allocated, if any
44 103
45# 8080/8085 registers 104# 8080/8085 registers
46# b, c, d, e, h, l, a 105# b, c, d, e, h, l, a
47my ($A, $B, $C, $D, $E, $H, $L, $A); 106my ($A, $B, $C, $D, $E, $H, $L, $A);
48my ($PC, $SP, $IFF, $FA, $FZ, $FS, $FP, $FC); 107my ($PC, $SP, $IFF, $FA, $FZ, $FS, $FP, $FC);
… …
54my $x; # dummy temp for instructions 113my $x; # dummy temp for instructions
55 114
56my $CLK; # rather inexact clock 115my $CLK; # rather inexact clock
57 116
58############################################################################# 117#############################################################################
118# the dreaded NVR1400 chip. not needed to get it going, but provided anyway
59 119
60# nvram 120# nvram
61my @NVR = (0x3fff) x 100; # vt102: 214e accum, 214f only lower 8 bit used, first 44 bytes 121my @NVR = (0x3fff) x 100; # vt102: 214e accum, 214f only lower 8 bit used, first 44 bytes
62my $NVRADDR; 122my $NVRADDR;
63my $NVRDATA; 123my $NVRDATA;
64my $NVRLATCH; 124my $NVRLATCH;
65 125
66#$NVR[$_] = $_ for 0..99;#d#
67
68my @NVRCMD = ( 126my @NVRCMD = (
69 sub { # accept data
70 $NVRDATA = ($NVRDATA << 1) + $_[1]; 127 sub { $NVRDATA = ($NVRDATA << 1) + $_[1]; }, # 0 accept data
71 }, 128 sub { $NVRADDR = ($NVRADDR << 1) + $_[1]; }, # 1 accept addr
72 sub { # accept addr 129 sub { ($NVRDATA <<= 1) & 0x4000 }, # 2 shift out
73 $NVRADDR = ($NVRADDR << 1)+ $_[1]; 130 undef, # 3 not used, will barf
74 },
75 sub { # shift out
76 my $bit = $NVRDATA & 0x02000;
77 $NVRDATA *= 2;
78 $bit
79 },
80 undef,
81 sub { # write
82 print "NVR WRITE $_[0]\n";#d#
83 $NVR[$_[0]] = $NVRDATA & 0x3fff; 131 sub { $NVR[$_[0]] = $NVRDATA & 0x3fff; }, # 4 write
84 }, 132 sub { $NVR[$_[0]] = 0x3fff; }, # 5 erase
85 sub { # erase 133 sub { $NVRDATA = $NVR[$_[0]]; }, # 6 read
86 print "NVR ERASE $_[0]\n";#d# 134 sub { }, # 7 standby
87 $NVR[$_[0]] = 0x3fff;
88 },
89 sub { # read
90# print "NVR READ $_[0] = $NVR[$_[0]]\n";#d#
91 $NVRDATA = $NVR[$_[0]];
92 },
93 sub { # standby
94 },
95); 135);
96 136
97my @bitidx; 137my @bitidx;
98$bitidx[1 << $_] = 9 - $_ for 0..9; 138$bitidx[1 << $_] = 9 - $_ for 0..9;
99 139
… …
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#############################################################################
151# I/O ports - output
111 152
112my $DC11 = 0; # 4 bit commands 153my $DC11_REVERSE = 0;
113my $DC12 = 0;
114 154
115my $XON = 1; # false if terminal wants us to pause 155my $XON = 1; # false if terminal wants us to pause
116my $PUSARTCMD; 156my $PUSARTCMD;
117 157
118my @KXMIT; # current scan queue 158my @KXMIT; # current scan queue
… …
124 164
125sub out_00 { # pusartdata 165sub out_00 { # pusartdata
126 # handle xon/xoff, but also pass it through 166 # handle xon/xoff, but also pass it through
127 if ($_[0] == 0x13) { 167 if ($_[0] == 0x13) {
128 $XON = 0; 168 $XON = 0;
169 return;#d#
129 } elsif ($_[0] == 0x11) { 170 } elsif ($_[0] == 0x11) {
130 $XON = 1; 171 $XON = 1;
172 return;#d#
131 } 173 }
132 174
133 syswrite $PTY, chr $_[0]; 175 syswrite $PTY, chr $_[0];
134 176
135 $INTPEND |= 1; # 5.5 txrdy 177 $INTPEND |= 1;
136} 178}
137 179
138sub out_01 { 180sub out_01 {
139 $PUSARTCMD = shift; 181 $PUSARTCMD = shift;
140 182
141 $INTPEND |= 1 if $PUSARTCMD & 0x01; # VT102, 5.5 txrdy 183 $INTPEND |= 1 if $PUSARTCMD & 0x01; # VT102, 5.5 txrdy
142 $INTPEND |= 2 if $PUSARTCMD & 0x04; # VT102, 6.5 rxrdy 184 $INTPEND |= 2 if $PUSARTCMD & 0x04 && !@PUSARTRECV; # VT102, 6.5 rxrdy, needed for some reason
143} 185}
144 186
145sub out_02 { } # baudrate generator 187sub out_02 { } # baudrate generator
146 188
147sub out_23 { } # unknown 189sub out_23 { } # unknown
… …
152 194
153sub out_62 { 195sub out_62 {
154 $NVRLATCH = shift; 196 $NVRLATCH = shift;
155} 197}
156 198
157sub out_a2 { $DC11 = shift } 199sub out_a2 {
200 my $dc11 = 0x0f & shift;
201
202 $DC11_REVERSE = 1 if $dc11 == 0b1010;
203 $DC11_REVERSE = 0 if $dc11 == 0b1011;
204}
205
158sub out_c2 { } # unknown 206sub out_c2 { } # unknown
159sub out_d2 { $DC12 = shift } 207sub out_d2 { } # 0..3 == 80c/132c/60hz/50hz
160 208
161sub out_82 { 209sub out_82 {
162 # keyboard 210 # keyboard
163 211
164 # CLICK STARTSCAN ONLINE LOCKED | CTS DSR INSERT L1(?) 212 # CLICK STARTSCAN ONLINE LOCKED | CTS DSR INS L1
165 # CLICK STARTSCAN ONLINE LOCKED | LED1 LED2 LED3 LED4 213 # CLICK STARTSCAN ONLINE LOCKED | L1 L2 L3 L4
166 $KSTATUS = $_[0]; 214 $KSTATUS = $_[0];
167 215
168 # start new scan unless scan in progress 216 # start new scan unless scan in progress
169 if (($_[0] & 0x40) && !@KXMIT) { 217 if (($_[0] & 0x40) && !@KXMIT) {
170 # do not reply with keys in locked mode 218 # do not reply with keys in locked mode
… …
193 $RST |= 1; 241 $RST |= 1;
194 } 242 }
195} 243}
196 244
197############################################################################# 245#############################################################################
246# I/O ports - input
198 247
199my $NVRBIT; 248my $NVRBIT;
200my $LBA; 249my $LBA6; # twice the frequenxy of LBA7
201 250
202sub in_00 { # pusart data 251sub in_00 { # pusart data
203# print "READ PUSARTDATA (@PUSARTRECV)\n"; 252 # interrupt not generated here, because infinite
204 253 # speed does not go well with the vt102.
205# $RST |= 2 if $#PUSARTRECV && $XON;
206# $INTPEND |= 2 if $#PUSARTRECV && $XON;
207 254
208 shift @PUSARTRECV 255 shift @PUSARTRECV
209} 256}
210 257
211sub in_01 { # pusart status 258sub in_01 { # pusart status
… …
216sub in_22 { # modem buffer(?) 263sub in_22 { # modem buffer(?)
217 # wild guess: -CTS -SPDI -RI -CD 0 0 0 0 264 # wild guess: -CTS -SPDI -RI -CD 0 0 0 0
218 0x20 265 0x20
219} 266}
220 267
221sub in_0f { } # unknown, connected to out 2f 268sub in_0f { 0xff } # vt102 unknown, connected to out 2f
222 269
223sub in_42 { # flag buffer 270sub in_42 { # flag buffer
224 ++$LBA; 271 ++$LBA6;
225# ++$LBA;
226# printf "%04x lba %04x, %04x\n", $PC, $LBA, $CLK;
227 272
228 $NVRBIT = nvr ? 0x20 : 0x00 if ($LBA & 0x3) == 0x2; 273 $NVRBIT = nvr ? 0x20 : 0x00 if ($LBA6 & 0x3) == 0x2;
229 274
230 # KBD_XMITEMPTY LBA7 NVRDATA ODDFIELD - OPTION !GFX !AVO PUSART_TXRDY 275 # KBD_XMITEMPTY LBA7 NVRDATA ODDFIELD - OPTION !GFX !AVO PUSART_TXRDY
231 276
232 my $f = 0x85 | $NVRBIT; 277 my $f = 0x85 | $NVRBIT;
233 278
234 $f |= 0x02 unless $AVO; 279 $f |= 0x02 unless $AVO;
235 $f |= 0x40 if $LBA & 0x2; 280 $f |= 0x40 if $LBA6 & 0x2;
236 281
237 $f 282 $f
238} 283}
239 284
240sub in_82 { # tbmt keyboard uart 285sub in_82 { # tbmt keyboard uart
… …
242 287
243 $RST |= 1; 288 $RST |= 1;
244 shift @KXMIT 289 shift @KXMIT
245} 290}
246 291
247sub in_03 { 0xff } # unknown, printer uart input? 292sub in_03 { 0xff } # vt102 unknown, printer uart input?
248sub in_0b { 0xff } # unknown 293sub in_0b { 0xff } # vt102 unknown
249sub in_17 { 0xff } # unknown, printer status clear by reading? 294sub in_17 { 0xff } # vt102 unknown, printer status clear by reading?
250sub in_1b { 0xff } # unknown 295sub in_1b { 0xff } # vt102 unknown
251 296
252############################################################################# 297#############################################################################
298# 8085 cpu opcodes and flag handling
253 299
254sub sf { 300sub sf { # set flags (ZSC - AP not implemented)
301 $FS = $_[0] & 0x080;
302 $FZ = !($_[0] & 0x0ff);
303 $FC = $_[0] & 0x100;
304
305 $_[0] &= 0xff;
306}
307
308sub sf8 { # set flags (ZSC - AP not implemented)
309 $FS = $_[0] & 0x080;
310 $FZ = !($_[0] & 0x0ff);
311 $FC = 0;
312}
313
314sub sf_nc { # set flags except carry
255 $FS = $_[0] & 0x080; 315 $FS = $_[0] & 0x080;
256 $FZ = ($_[0] & 0x0ff) == 0; 316 $FZ = ($_[0] & 0x0ff) == 0;
257 $FC = $_[0] & 0x100;
258 317
259 $_[0] & 0xff 318 $_[0] &= 0xff;
260} 319}
261 320
262sub sf_nc {
263 $FS = $_[0] & 0x080;
264 $FZ = ($_[0] & 0x0ff) == 0;
265
266 $_[0] & 0xff
267}
268
269my @op = map { sprintf "status(); die 'unknown op %02x'", $_ } 0 .. 255; 321my @op = map { sprintf "status(); die 'unknown op %02x'", $_ } 0x00 .. 0xff;
270my @ops;
271 322
272my @reg = qw($B $C $D $E $H $L $M[$H*256+$L] $A); 323my @reg = qw($B $C $D $E $H $L $M[$H*256+$L] $A);
273my @cc = ('if !$FZ', 'if $FZ', 'if !$FC', 'if $FC', ';die', ';die', 'if !$FS', 'if $FS'); # die == unimplemented $FP parity 324my @cc = ('if !$FZ', 'if $FZ', 'if !$FC', 'if $FC', ';die', ';die', 'if !$FS', 'if $FS'); # die == unimplemented $FP parity
325
326$op[0x00] = '';
274 327
275# mov r,r / r,M / M,r 328# mov r,r / r,M / M,r
276for my $s (0..7) { 329for my $s (0..7) {
277 for my $d (0..7) { 330 for my $d (0..7) {
278 $op[0x40 + $d * 8 + $s] = "$reg[$d] = $reg[$s]"; 331 $op[0x40 + $d * 8 + $s] = "$reg[$d] = $reg[$s]"; # mov
279 } 332 }
280} 333}
281 334
282$op[0x00] = ''; 335$op[0x76] = 'die "HLT"'; # hlt (mov m,m)
336
337# mvi r / M
338$op[0x06 + $_ * 8] = "$reg[$_] = IMM8" for 0..7;
283 339
284$op[0x01] = '($B, $C) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi 340$op[0x01] = '($B, $C) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi
285$op[0x11] = '($D, $E) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi 341$op[0x11] = '($D, $E) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi
286$op[0x21] = '($H, $L) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi 342$op[0x21] = '($H, $L) = (IMM16 >> 8, IMM16 & 0xff)'; # lxi
287$op[0x31] = '$SP = IMM16' ; # lxi #d# 0xf000 because of limited stack 343$op[0x31] = '$SP = IMM16' ; # lxi
288 344
289$op[0x02] = '$M[$B * 256 + $C] = $A'; # stax 345$op[0x02] = '$M[$B * 256 + $C] = $A'; # stax
290$op[0x12] = '$M[$D * 256 + $E] = $A'; # stax 346$op[0x12] = '$M[$D * 256 + $E] = $A'; # stax
291$op[0x32] = '$M[IMM16 ] = $A'; # sta 347$op[0x32] = '$M[IMM16 ] = $A'; # sta
292 348
349$op[0x0a] = '$A = $M[$B * 256 + $C]'; # ldax b
350$op[0x1a] = '$A = $M[$D * 256 + $E]'; # ldax d
351$op[0x3a] = '$A = $M[IMM16]'; # lda
352
353$op[0x22] = '($M[IMM16], $M[IMM16 + 1]) = ($L, $H)'; # shld
354$op[0x2a] = '($L, $H) = ($M[IMM16], $M[IMM16 + 1])'; # lhld
355
293sub inxdcx($$$) { 356sub inxdcx($$$) {
294 $x = ($_[0] * 256 + $_[1] + $_[2]) & 0xffff; 357 $x = $_[0] * 256 + $_[1] + $_[2];
295 $_[0] = $x >> 8; 358 ($_[0], $_[1]) = (($x >> 8) & 0xff, $x & 0xff);
296 $_[1] = $x & 0xff;
297} 359}
298 360
299$op[0x03] = 'inxdcx $B, $C, 1'; # inx 361$op[0x03] = 'inxdcx $B, $C, 1'; # inx
300$op[0x13] = 'inxdcx $D, $E, 1'; # inx 362$op[0x13] = 'inxdcx $D, $E, 1'; # inx
301$op[0x23] = 'inxdcx $H, $L, 1'; # inx 363$op[0x23] = 'inxdcx $H, $L, 1'; # inx
… …
304$op[0x1b] = 'inxdcx $D, $E, -1'; # dcx 366$op[0x1b] = 'inxdcx $D, $E, -1'; # dcx
305$op[0x2b] = 'inxdcx $H, $L, -1'; # dcx 367$op[0x2b] = 'inxdcx $H, $L, -1'; # dcx
306$op[0x3b] = '--$SP' ; # dcx 368$op[0x3b] = '--$SP' ; # dcx
307 369
308# "no carry" doesn't seem to be needed for vt100 - optimize? 370# "no carry" doesn't seem to be needed for vt100 - optimize?
309$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
311
312# mvi r / M
313$op[0x06 + $_ * 8] = "$reg[$_] = IMM8" for 0..7; 371$op[0x04 + $_ * 8] = "sf_nc ++$reg[$_]" for 0..7; # inr
372$op[0x05 + $_ * 8] = "sf_nc --$reg[$_]" for 0..7; # dcr
373
374$op[0x07] = ' $FC = $A & 0x80; $A = (($A << 1) + ($FC && 0x01)) & 0xff '; # rlc
375$op[0x17] = ' ($FC, $A) = ($A & 0x80, (($A << 1) + ($FC && 0x01)) & 0xff)'; # ral
376
377$op[0x0f] = ' $FC = $A & 0x01; $A = ($A >> 1) | ($FC && 0x80) '; # rrc
378$op[0x1f] = ' ($FC, $A) = ($A & 0x01, ($A >> 1) | ($FC && 0x80))'; # rar
379
380$op[0x2f] = '$A ^= 0xff'; # cma
314 381
315# getting this insn wrong (its the only 16 bit insn to modify flags) 382# 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 383# wasted three of my best days with mindless vt102 rom reverse engineering
317sub dad { 384sub dad {
318 $x = $H * 256 + $L + $_[0]; 385 $x = $H * 256 + $L + $_[0];
… …
324$op[0x09] = 'dad $B * 256 + $C'; # dad 391$op[0x09] = 'dad $B * 256 + $C'; # dad
325$op[0x19] = 'dad $D * 256 + $E'; # dad 392$op[0x19] = 'dad $D * 256 + $E'; # dad
326$op[0x29] = 'dad $H * 256 + $L'; # dad 393$op[0x29] = 'dad $H * 256 + $L'; # dad
327$op[0x39] = 'dad $SP '; # dad 394$op[0x39] = 'dad $SP '; # dad
328 395
329$op[0x07] = ' $FC = $A >> 7; $A = ($A * 2 + $FC) & 0xff '; # rlc 396$op[0x80 + $_] = 'sf $A += + ' . $reg[$_] for 0..7; # add
330$op[0x17] = ' ($FC, $A) = ($A >> 7, ($A * 2 + $FC) & 0xff)'; # ral 397$op[0x88 + $_] = 'sf $A += ($FC && 1) + ' . $reg[$_] for 0..7; # adc
398$op[0x90 + $_] = 'sf $A -= + ' . $reg[$_] for 0..7; # sub
399$op[0x98 + $_] = 'sf $A -= ($FC && 1) + ' . $reg[$_] for 0..7; # sbb
400$op[0xa0 + $_] = 'sf8 $A &= ' . $reg[$_] for 0..7; # ana
401$op[0xa8 + $_] = 'sf8 $A ^= ' . $reg[$_] for 0..7; # xra
402$op[0xb0 + $_] = 'sf8 $A |= ' . $reg[$_] for 0..7; # ora
403$op[0xb8 + $_] = 'sf $x = $A - ' . $reg[$_] for 0..7; # cmp
404# possible todo: optimize ora a, maybe xra a
331 405
332$op[0x0f] = ' $FC = $A & 1; $A = ($A >> 1) | ($FC && 0x80) '; # rrc 406$op[0xc6] = 'sf $A += IMM8'; # adi
333$op[0x1f] = ' ($FC, $A) = ($A & 1, ($A >> 1) | ($FC && 0x80))'; # rar 407# ce ADI NYI
408$op[0xd6] = 'sf $A -= IMM8'; # sui
409# de SBI NYI
410$op[0xe6] = 'sf8 $A &= IMM8'; # ani
411$op[0xee] = 'sf8 $A ^= IMM8'; # xri
412$op[0xf6] = 'sf8 $A |= IMM8'; # ori
413$op[0xfe] = 'sf $A - IMM8'; # cpi
334 414
335$op[0x0a] = '$A = $M[$B * 256 + $C]'; # ldax b 415$op[0xc5] = 'PUSH $B; PUSH $C';
336$op[0x1a] = '$A = $M[$D * 256 + $E]'; # ldax d 416$op[0xd5] = 'PUSH $D; PUSH $E';
337$op[0x3a] = '$A = $M[IMM16]'; # lda 417$op[0xe5] = 'PUSH $H; PUSH $L';
418$op[0xf5] = 'PUSH $A; PUSH +($FS && 0x80) | ($FZ && 0x40) | ($FA && 0x10) | ($FP && 0x04) | ($FC && 0x01)'; # psw
419
420$op[0xc1] = '($C, $B) = (POP, POP)'; # pop
421$op[0xd1] = '($E, $D) = (POP, POP)'; # pop
422$op[0xe1] = '($L, $H) = (POP, POP)'; # pop
423$op[0xf1] = '($x, $A) = (POP, POP); ($FS, $FZ, $FA, $FP, $FC) = ($x & 0x80, $x & 0x40, $x & 0x10, $x & 0x04, $x & 0x01)'; # pop psw
424
425$op[0xc2 + $_ * 8] = 'BRA IMM16 ' . $cc[$_] for 0..7; # jcc
426$op[0xc3] = 'JMP IMM16'; # jmp
427
428$op[0xc4 + $_ * 8] = '(PUSH PC >> 8), (PUSH PC & 0xff), (BRA IMM16) ' . $cc[$_] for 0..7; # ccc
429$op[0xcd] = '(PUSH PC >> 8), (PUSH PC & 0xff), (BRA IMM16)'; # call
430
431$op[0xc0 + $_ * 8] = 'BRA POP + POP * 256 ' . $cc[$_] for 0..7; # rcc
432$op[0xc9] = 'JMP POP + POP * 256'; # ret
433
434$op[0xc7 + $_ * 8] = "JMP $_ * 8" for 0..7; # rst
435
436$op[0xe9] = 'JMP $H * 256 + $L'; # pchl
437# f9 SPHL NYI
438
439$op[0x37] = '$FC = 1 '; # stc
440$op[0x3f] = '$FC = !$FC'; # cmc
441
442$op[0xd3] = 'OUT'; # out
443$op[0xdb] = 'IN'; # in
444
445$op[0xeb] = '($D, $E, $H, $L) = ($H, $L, $D, $E)'; # xchg
446
447# e3 xthl NYI # @ 917b, hl <-> (sp)
338 448
339$op[0x20] = '$A = $INTPEND * 16 + $INTMASK + ($IFF && 8)'; # rim (incomplete) 449$op[0x20] = '$A = $INTPEND * 16 + $INTMASK + ($IFF && 8)'; # rim (incomplete)
340$op[0x30] = '$INTMASK = $A & 7 if $A & 8'; # sim (incomplete) 450$op[0x30] = '$INTMASK = $A & 7 if $A & 8'; # sim (incomplete)
341 451
342$op[0x22] = '($M[IMM16], $M[IMM16 + 1]) = ($L, $H)'; # shld 452$op[0xf3] = '$IFF = 0'; # DI
343$op[0x2a] = '($L, $H) = ($M[IMM16], $M[IMM16 + 1])'; # lhld 453$op[0xfb] = '$IFF = 1'; # EI
344 454
345# yeah, the fucking setup screens actually use daa... 455# yeah, the fucking setup screens actually use daa...
346$op[0x27] = ' 456$op[0x27] = '
347 my ($h, $l); 457 my ($h, $l);
348 458
349 ($h, $l) = ($A >> 4, $A & 15); 459 ($h, $l) = ($A >> 4, $A & 15);
350 460
351 if ($l > 9 || $FA) { 461 if ($l > 9 || $FA) {
352 $A = sf $A + 6; 462 sf $A += 6;
353 ($h, $l) = ($A >> 4, $A & 15); 463 ($h, $l) = ($A >> 4, $A & 15);
354 } 464 }
355 465
356 if ($h > 9 || $FC) { 466 if ($h > 9 || $FC) {
357 $h += 6; 467 $h += 6;
358 $A = ($h * 16 + $l) & 0xff; 468 $A = ($h * 16 + $l) & 0xff;
359 } 469 }
360'; # daa, almost certainly borked, also, acarry not set by sf 470'; # daa, almost certainly borked, also, acarry not set by sf
361 471
362$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############################################################################# 472#############################################################################
473# print cpu status for debugging purposes
422 474
423# print cpu status, for debugging 475# print cpu status, for debugging
424sub status { 476sub status {
425 my $PC = shift || $PC; 477 my $PC = shift || $PC;
426 478
… …
430 ($FZ ? "1" : "0") 482 ($FZ ? "1" : "0")
431 . ($FS ? "1" : "0") 483 . ($FS ? "1" : "0")
432 . ($FC ? "1" : "0") 484 . ($FC ? "1" : "0")
433 . ($FA ? "1" : "0") 485 . ($FA ? "1" : "0")
434 . ($FP ? "1" : "0"), 486 . ($FP ? "1" : "0"),
435 $M[$PC], $ops[$M[$PC]]; 487 $M[$PC], $op[$M[$PC]];
436} 488}
437 489
438############################################################################# 490#############################################################################
491# video emulation
439 492
440my @chr = ( 493my @CHARMAP = (
441 " ", 494 " " , "\x{29eb}", "\x{2592}", "\x{2409}",
442 "\x{29eb}", 495 "\x{240c}", "\x{240d}", "\x{240a}", "\x{00b0}",
443 "\x{2592}", 496 "\x{00b1}", "\x{2424}", "\x{240b}", "\x{2518}",
444 "\x{2409}", 497 "\x{2510}", "\x{250c}", "\x{2514}", "\x{253c}",
445 "\x{240c}", 498 "\x{23ba}", "\x{23bb}", "\x{2500}", "\x{23bc}",
446 "\x{240d}", 499 "\x{23bd}", "\x{251c}", "\x{2524}", "\x{2534}",
447 "\x{240a}", 500 "\x{252c}", "\x{2502}", "\x{2264}", "\x{2265}",
448 "\x{00b0}", 501 "\x{03c0}", "\x{2260}", "\x{00a3}", "\x{00b7}",
449 "\x{00b1}",
450 "\x{2424}",
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), 502 (map chr, 0x020 .. 0x7e),
474 "?",
475); 503);
476 504
477utf8::encode $_ for @chr; 505utf8::encode $_ for @CHARMAP;
478 506
479sub prscr { 507my @SGR; # sgr sequences for attributes
508
509for (0x00 .. 0xff) {
510 my $sgr = "";
511
512 # ~1 sgr 5 blink
513 # ~2 sgr 4 underline
514 # ~4 sgr 1 bold
515 # 0x80 in attr, sgr 7, reversed
516
517 $sgr .= ";5" unless $_ & 0x01;
518 $sgr .= ";4" unless $_ & 0x02;
519 $sgr .= ";1" unless $_ & 0x04;
520 $sgr .= ";7" if $_ & 0x80;
521
522 $SGR[$_] = "\e[${sgr}m";
523}
524
525my @LED = $VT102
526 ? qw(L1 INSERT DSR CTS LOCKED LOCAL SCAN BEEP)
527 : qw(L4 L3 L2 L1 LOCKED LOCAL SCAN BEEP);
528
529# display screen
530sub display {
480 my $i = 0x2000; 531 my $i = 0x2000;
481 532
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; 533 my $leds = join " ", map $KSTATUS & 2**$_ ? "\e[7m$LED[$_]\e[m" : "$LED[$_]", reverse 0 .. $#LED;
483 534
535 my $scr = sprintf "\e[H--- LED [ %s ] CLK %d\e[K\n", $leds, $CLK;
536
537 $scr .= "\e[?5" . ($DC11_REVERSE ? "h" : "l");
538
484 line: 539 line:
485 for my $y (0 .. 25) { 540 for my $y (0 .. 25) { # ntsc, two vblank delay lines, up to 24 text lines
541 my $prev_sgr;
542
486 $scr .= sprintf "%2d |", ++$y; 543 $scr .= sprintf "%2d \xe2\x94\x82", $y;
487 544
488 for (0..140) { 545 for (0..139) {
489 my $c = $M[$i++]; 546 my $c = $M[$i];
490
491# printf "%04x %02x\n", $i-1,$c;
492 547
493 if ($c == 0x7f) { # also 0xff, but the firmware avoids that 548 if ($c == 0x7f) { # also 0xff, but the firmware avoids that
494 $scr .= "|\x1b[K\n"; 549 $scr .= "\e[m\xe2\x94\x82\e[K\n";
495 550
496 my $a1 = $M[$i++]; 551 my $a1 = $M[$i + 1];
497 my $a0 = $M[$i++]; 552 my $a0 = $M[$i + 2];
498 553
499 $i = 0x2000 + (($a1 * 256 + $a0) & 0xfff); 554 $i = 0x2000 + (($a1 * 256 + $a0) & 0xfff);
500 555
501 next line; 556 next line;
502 } 557 }
503 558
504 $scr .= "\x1b[7m" if $c & 0x80; 559 my $sgr = $SGR[ ($M[$i++ + 0x1000] & 15) | ($c & 0x80)];
505 $scr .= $chr[$c & 0x7f] // sprintf "[%02x]", $c & 0x7f; 560
506 $scr .= "\x1b[m" if $c & 0x80; 561 $scr .= $prev_sgr = $sgr if $sgr ne $prev_sgr;
562
563 $scr .= $CHARMAP[$c & 0x7f];
507 } 564 }
508 565
509 $scr .= "\x1b[K\noverflow\x1b[K\n"; 566 $scr .= "\e[K\nvideo overflow\e[K\n";
510 last; 567 last;
511 } 568 }
512 569
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"; 570 $scr .= "\e[m\e[J";
525 571
526 syswrite STDOUT, $scr; 572 syswrite STDOUT, $scr;
527} 573}
528 574
529############################################################################# 575#############################################################################
576# keyboard handling
530 577
531if (@ARGV) { 578# 0x080 shift, 0x100 ctrl
532 require IO::Pty; 579my %KEYMAP = (
533 $PTY = IO::Pty->new; 580 "\t" => 0x3a,
581 "\r" => 0x64,
582 "\n" => 0x44,
583
584 "\x00" => 0x77 | 0x100, # CTRL-SPACE
585 "\x1c" => 0x45 | 0x100, # CTRL-\
586 "\x1d" => 0x14 | 0x100, # CTRL-]
587 "\x1e" => 0x24 | 0x100, # CTRL-~
588 "\x1f" => 0x75 | 0x100, # CTRL-?
589
590 # hardcoded rxvt keys
591 "\e" => 0x2a, # ESC
592 "\e[3~" => 0x03, # DC
593 "\e[5~" => 0x7e, # CAPS LOCK (prior)
594 "\e[6~" => 0x6a, # NO SCROLL (next)
595 "\e[A" => 0x30, # UP
596 "\e[B" => 0x22, # DOWN
597 "\e[C" => 0x10, # RIGHT
598 "\e[D" => 0x20, # LEFT
599 "\e[a" => 0x30 | 0x080, # UP
600 "\e[b" => 0x22 | 0x080, # DOWN
601 "\e[c" => 0x10 | 0x080, # RIGHT
602 "\e[d" => 0x20 | 0x080, # LEFT
603 "\e[7~" => 0x7b, # SETUP (home)
604 "\e[8~" => 0x23, # BREAK (end)
605 "\e[8\$" => 0x23 | 0x080, # SHIFT BREAK / DISCONNECT (shift-end)
606 "\x7f" => 0x33, # BACKSPACE
607
608 "\e[11~" => 0x32, # F1
609 "\e[11~" => 0x42, # F2
610 "\e[11~" => 0x31, # F3
611 "\e[11~" => 0x41, # F4
612);
534 613
535 my $slave = $PTY->slave; 614@KEYMAP{map chr, 0x20 .. 0x40, 0x5b .. 0x7e} = unpack "C*", pack "H*",
615 "779ad5a9a8b8a755a6b5b6b466256575" . "351a3929283837273626d656e634e5f5" . "b9" # 20..40
616 . "154514b7a5" . "244a6879591949485816574746766706" . "050a185a0817780969077a95c594a4"; # 5b..7e
536 617
537 unless (fork) { 618$KEYMAP{"\x1f" & $_} ||= $KEYMAP{$_} | 0x100 for "a" .. "z"; # ctrl
538 $ENV{TERM} = $VT102 ? "vt102" : "vt100"; 619$KEYMAP{"\x20" ^ $_} ||= $KEYMAP{$_} | 0x080 for "a" .. "z"; # shift
539 620
540 close $PTY; 621my $KEYMATCH = join "|", map quotemeta, reverse sort keys %KEYMAP;
622$KEYMATCH = qr{^($KEYMATCH)}s;
541 623
542 open STDIN , "<&", $slave; 624my %KMOD;
543 open STDOUT, ">&", $slave;
544 open STDERR, ">&", $slave;
545 625
546 close $slave; 626sub key {
627 my ($key) = @_;
547 628
548 exec @ARGV; 629 push @KQUEUE, -0x7c if !($key & 0x100) && delete $KMOD{0x7c}; # ctrl-up
549 } 630 push @KQUEUE, -0x7d if !($key & 0x080) && delete $KMOD{0x7d}; # shift-up
550 631
551 close $slave; 632 push @KQUEUE, 0x7c if $key & 0x100 && !$KMOD{0x7c}++; # ctrl-down
552} else { 633 push @KQUEUE, 0x7d if $key & 0x080 && !$KMOD{0x7d}++; # shift-down
553 open $PTY, "</dev/null" or die;#d
554}
555 634
556############################################################################# 635 $key &= 0x7f;
636 push @KQUEUE, $key, -$key;
637}
557 638
639my $STDIN_BUF;
640
641sub stdin_parse {
642 key $KEYMAP{$1}
643 while $STDIN_BUF =~ s/$KEYMATCH//;
644
645 # skip input we can't decipher
646 substr $STDIN_BUF, 0, 1, "";
647}
648
649if ($KBD) {
650 system "stty -icanon -icrnl -inlcr -echo min 1 time 0";
651 eval q{ sub END { system "stty sane" } };
652 $SIG{INT} = $SIG{TERM} = $SIG{QUIT} = sub { exit 1 };
653}
654
655#############################################################################
558# initial key input, to set up online mode etc. 656# initial key input, to set up online mode etc.
657# could be done via nvram defaults
658
559@KQUEUE = ( 659@KQUEUE = (
560 0x7b, -0x7b, # setup 660 0x7b, -0x7b, # setup
561 0, # delay 661 0, # delay
562 0x28, -0x28, # 4, toggle local/online 662 0x28, -0x28, # 4, toggle local/online
563 0x38, -0x38, # 5, setup b 663 0x38, -0x38, # 5, setup b
… …
574 0x37, -0x37, # 6 toggle wrap around 674 0x37, -0x37, # 6 toggle wrap around
575 0x7b, -0x7b, # leave setup 675 0x7b, -0x7b, # leave setup
576); 676);
577 677
578############################################################################# 678#############################################################################
679# process/pty management
579 680
580# 0x80 shift, 0x100 ctrl, 0x200 toggle 681require IO::Pty;
581my %KEYMAP = ( 682$PTY = IO::Pty->new;
582 "\t" => 0x3a,
583 "\r" => 0x64,
584 "\n" => 0x44,
585 683
586 # hardcoded rxvt keys 684my $slave = $PTY->slave;
587 "\e" => 0x2a, # ESC
588 "\e[3~" => 0x03, # DC
589 "\e[5~" => 0x7e, # CAPS LOCK (prior)
590 "\e[6~" => 0x6a, # NO SCROLL (next)
591 "\e[A" => 0x30, # UP
592 "\e[B" => 0x22, # DOWN
593 "\e[C" => 0x10, # RIGHT
594 "\e[D" => 0x20, # LEFT
595 "\e[a" => 0x30 | 0x080, # UP
596 "\e[b" => 0x22 | 0x080, # DOWN
597 "\e[c" => 0x10 | 0x080, # RIGHT
598 "\e[d" => 0x20 | 0x080, # LEFT
599 "\e[7~" => 0x7b, # SETUP (home)
600 "\e[8~" => 0x23, # BREAK (end)
601 "\e[8\$" => 0x23 | 0x080, # SHIFT BREAK / DISCONNECT (shift-end)
602 "\x7f" => 0x33, # BACKSPACE
603 685
604 "\e[11~" => 0x32, # F1 686$PTY->set_winsize (24, 80);
605 "\e[11~" => 0x42, # F2
606 "\e[11~" => 0x31, # F3
607 "\e[11~" => 0x41, # F4
608);
609 687
610@KEYMAP{map chr, 0x20..0x40} = unpack "C*", pack "H*", 688unless (fork) {
611 "779ad5a9a8b8a755a6b5b6b466256575" . "351a3929283837273626d656e634e5f5" . "b9"; 689 $ENV{TERM} = $VT102 ? "vt102" : "vt100";
612 690
613@KEYMAP{map chr, 0x5b .. 0x7e} = unpack "C*", pack "H*", 691 close $PTY;
614 "154514b7a5" . "244a6879591949485816574746766706" . "050a185a0817780969077a95c594a4";
615 692
616$KEYMAP{"\x3f" & $_} ||= $KEYMAP{$_} | 0x100 for "a" .. "z"; # ctrl 693 open STDIN , "<&", $slave;
617$KEYMAP{uc $_} ||= $KEYMAP{$_} | 0x080 for "a" .. "z"; # shift 694 open STDOUT, ">&", $slave;
695 open STDERR, ">&", $slave;
618 696
619my $KEYMATCH = join "|", map quotemeta, reverse sort keys %KEYMAP; 697 system "stty ixoff erase ^H";
620$KEYMATCH = qr{^($KEYMATCH)}s;
621 698
622sub key { 699 $PTY->make_slave_controlling_terminal;
623 my ($key) = @_; 700 $PTY->close_slave;
624 701
625 state %MOD; 702 @ARGV = "sh" unless @ARGV;
626 703 exec @ARGV;
627 push @KQUEUE, -0x7c if !($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} 704}
636 705
637my $STDIN_BUF; 706$PTY->close_slave;
638 707
639sub stdin_parse {
640 key $KEYMAP{$1}
641 while $STDIN_BUF =~ s/$KEYMATCH//;
642
643 # skip input we can't decipher
644 substr $STDIN_BUF, 0, 1, "";
645}
646
647if ($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############################################################################# 708#############################################################################
709# the actual hardware simulator
654 710
655my @ICACHE; # compiled instruction cache 711my @ICACHE; # compiled instruction cache
656 712
657# the cpu
658while () { 713while () {
659
660 # execute extended basic blocks 714 # execute extended basic blocks
661 $PC = ($ICACHE[$PC] ||= do { 715 $PC = ($ICACHE[$PC] ||= do {
662 my $pc = $PC; 716 my $pc = $PC;
663 717
664 my $insn = ""; 718 my $insn = "";
665 719
666 # the jit compiler 720 # the jit compiler
667 for (0..15) { 721 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; 722 my $imm;
680 my $op = $op[$M[$pc++]]; 723 my $op = $op[$M[$pc++]];
681 724
682 for ($op) { 725 for ($op) {
683 s/\bPUSH\b/\$M[--\$SP] =/g; # push byte to stack 726 s/\bPUSH\b/\$M[--\$SP] =/g; # push byte to stack
… …
696 739
697 $insn .= "$op;\n"; 740 $insn .= "$op;\n";
698 } 741 }
699 742
700 743
701 $insn .= "$pc"; 744 $insn .= $pc;
702 $insn =~ s/\x00.*$//s; 745 $insn =~ s/\x00.*$//s;
703 746
704 eval "use integer; sub { $insn }" or die "$insn: $@" 747 eval "use integer; sub { $insn }" or die "$insn: $@"
705 })->(); 748 })->();
706 749
707 ++$CLK; 750 ++$CLK;
708 751
709 #TODO: just check on ret instructions or so 752 # things we do from time too time only
753 unless ($CLK & 0xf) {
754 # do I/O
755
756 unless ($CLK & 0xfff) {
757
758 # pty/serial I/O
759 unless ((@PUSARTRECV >= 128) || @KQUEUE || !$PTY) {
760 my $rin = ""; (vec $rin, fileno $PTY, 1) = 1;
761
762 if (select $rin, undef, undef, 0) {
763 sysread $PTY, my $buf, 256;
764 push @PUSARTRECV, unpack "C*", $buf;
765 }
766 }
767
768 # keyboard input
769 if ($KBD) {
770 while (select my $rin = "\x01", undef, undef, 0) {
771 sysread STDIN, $STDIN_BUF, 1, length $STDIN_BUF
772 or last;
773 }
774
775 stdin_parse if length $STDIN_BUF;
776 }
777 }
778
779 # kick off various interrupts
780
781 $RST |= 2 if @PUSARTRECV && $XON; # VT100, but works on vt102, too (probably not used on real hardware though)
782 #$INTPEND |= 2 if @PUSARTRECV && $XON; # VT102, 6.5 rxrdy
783
784 # kick off vertical retrace form time to time
785 unless ($CLK & 0x1ff) {
786 $RST |= 4; # vertical retrace
787 }
788
789 # handle video hardware
790 unless ($CLK & 0x3fff) {
791 display;
792 }
793 }
794
710 # the interrupt logic 795 # the interrupt logic
711 $x = $INTPEND & ~$INTMASK; 796 if (($RST || ($INTPEND & ~$INTMASK)) && $IFF) {
712
713 if (($RST || $x) && $IFF) {
714 # rst 1 kbd data available 797 # rst 1 kbd data available
715 # rst 2 pusart xmit+recv flag 798 # rst 2 pusart xmit+recv flag
716 # rst 4 vertical retrace 799 # rst 4 vertical retrace
717 # 5.5 vt125 mb7 trans ready (serial send?) 800 # 5.5 vt125 mb7 trans ready (serial send?)
718 # 6.5 vt125 mb7 read ready (something modem?) 801 # 6.5 vt125 mb7 read ready (something modem?)
719 # 7.5 vt125 mb7 vblank h(?) 802 # 7.5 vt125 mb7 vblank h(?)
720 # trap vt125 mbi init h(?) 803 # trap vt125 mbi init h(?)
721 my $vec; 804 my $vec;
722 805
806 $x = $INTPEND & ~$INTMASK;
807
723 if ($x & 1) { $vec = 0x2c; $INTPEND &= ~1; 808 if ($x & 1) { $vec = 0x2c; $INTPEND &= ~1;
724 } elsif ($x & 2) { $vec = 0x34; $INTPEND &= ~2; 809 } elsif ($x & 2) { $vec = 0x34; $INTPEND &= ~2;
725 } elsif ($x & 4) { $vec = 0x3c; $INTPEND &= ~4; 810 } elsif ($x & 4) { $vec = 0x3c; $INTPEND &= ~4;
726# } elsif ($RST ) { $vec = $RST * 8; $RST = 0; # for some reason, this breaks vt102 811# } elsif ($RST ) { $vec = $RST * 8; $RST = 0; # the vt102 firmware doesn't like combined interrupts
727 } elsif ($RST & 1) { $vec = 0x08; $RST &= ~1; # separate is better for vt102 812 } elsif ($RST & 1) { $vec = 0x08; $RST &= ~1; # separate is better for vt102
728 } elsif ($RST & 2) { $vec = 0x10; $RST &= ~2; 813 } elsif ($RST & 2) { $vec = 0x10; $RST &= ~2;
729 } elsif ($RST & 4) { $vec = 0x20; $RST &= ~4; 814 } elsif ($RST & 4) { $vec = 0x20; $RST &= ~4;
730 } else { 815 } else {
731 die; 816 die;
… …
735 $M[--$SP] = $PC & 0xff; 820 $M[--$SP] = $PC & 0xff;
736 $PC = $vec; 821 $PC = $vec;
737 822
738 $IFF = 0; 823 $IFF = 0;
739 } 824 }
740
741 # things we do from time too time only
742 unless ($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} 825}
826
827#############################################################################
828# roms in the data section + one newline
829#
830# vt100 @ 0x0000+0x0800 23-032E2
831# vt100 @ 0x0800+0x0800 23-061E2
832# vt100 @ 0x1000+0x0800 23-033E2
833# vt100 @ 0x1800+0x0800 23-034E2
834#
835# vt102 @ 0x0000+0x2000 23-226E4
836# vt102 @ 0x8000+0x2000 23-225E4
837#
838# vt131 @ 0xa000+0x0800 23-280E2
839#
784 840
785__DATA__ 841__DATA__
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7872!0* w4ʘ> 2! ~î!N ̓/2!! "R !""  8432!0* w4ʘ> 2! ~î!N ̓/2!! "R !"" 
788! ͋!2[ 2v!!"I!>2s >2 B>2y >2!2!&l" >@:X!:!͔>2!b:!K>G:| !p ^!p" :!x:! u> 844! ͋!2[ 2v!!"I!>2s >2 B>2y >2!2!&l" >@:X!:!͔>2!b:!K>G:| !p ^!p" :!x:! u>
… …
892 948
893.y' &%&5>LGxWdkͨwͨ/w!e!6#}vnͨwͨ ڐWzʁÚ#}v>‡ :,!ڢy2!:!OW!e!oһ$zW>0)1!2@3#4$5%6^7&8*9(-_=+`~[{]};:/?'",<.>\| poytwq][iure1`-9743=08652 Ѱ 949.y' &%&5>LGxWdkͨwͨ/w!e!6#}vnͨwͨ ڐWzʁÚ#}v>‡ :,!ڢy2!:!OW!e!oһ$zW>0)1!2@3#4$5%6^7&8*9(-_=+`~[{]};:/?'",<.>\| poytwq][iure1`-9743=08652 Ѱ
894\lkgfa';jhds .,nbx* :B!4 950\lkgfa';jhds .,nbx* :B!4
895!O!,ͳʄmÝ 951!O!,ͳʄmÝ
896! 0>2ͳʥ†">02I y>c}" 2. y2N!~2/ z#ͫ:/ w:N!O:/ O#:. <õ!N!蝾:&0> 2 !{!>!q{" ÎWaitp!O!'6#'M_! 0R_:B!7N  952! 0>2ͳʥ†">02I y>c}" 2. y2N!~2/ z#ͫ:/ w:N!O:/ O#:. <õ!N!蝾:&0> 2 !{!>!q{" ÎWaitp!O!'6#'M_! 0R_:B!7N 
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954"~ACŠ>Bw2"!z"pv"x">Cw2"!n"pv"l"!!~< N[>2,!NAp##!(0S{}ˠ>w# »xE##ö6T]#zpw#sX6#N|p}Hpv"x"7:
955"C*C!(0:!@W ==}wï2C!2D!z5*b Q!{!| gH:d G| gW]>6#k<|eoozW>Ê

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