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Comparing vt102/vt102 (file contents):
Revision 1.13 by root, Wed Dec 3 02:13:26 2014 UTC vs.
Revision 1.17 by root, Wed Dec 3 02:16:30 2014 UTC

… …
21#use common::sense; 21#use common::sense;
22 22
23my $VT102 = 1; 23my $VT102 = 1;
24my $VT131 = 0; 24my $VT131 = 0;
25my $AVO = 1; 25my $AVO = 1;
26my $KBD = 1;
27 26
28shift, ($VT102 = 0), ($AVO = 0) if $ARGV[0] =~ /^-?-vt100$/; 27shift, ($VT102 = 0), ($AVO = 0) if $ARGV[0] =~ /^-?-vt100$/;
29shift, ($VT102 = 0) if $ARGV[0] =~ /^-?-vt100\+avo$/; 28shift, ($VT102 = 0) if $ARGV[0] =~ /^-?-vt100\+avo$/;
30shift if $ARGV[0] =~ /^-?-vt102$/; 29shift if $ARGV[0] =~ /^-?-vt102$/;
31shift, ($VT131 = 1) if $ARGV[0] =~ /^-?-vt131$/; 30shift, ($VT131 = 1) if $ARGV[0] =~ /^-?-vt131$/;
… …
73} 72}
74 73
75############################################################################# 74#############################################################################
76# ROM/hardware init 75# ROM/hardware init
77 76
77my $PTY; # the pty we allocated, if any
78my $KBD = 1;
79
78my $ROMS = do { 80my $ROMS = do {
79 binmode DATA; 81 binmode DATA;
80 local $/; 82 local $/;
81 <DATA> 83 <DATA>
82}; 84};
83 85
840x6801 == length $ROMS or die "corrupted rom image"; 860x6801 == length $ROMS or die "corrupted rom image";
85
86binmode STDOUT;
87 87
88my @M = (0xff) x 65536; # main memory, = (0xff) x 65536; 88my @M = (0xff) x 65536; # main memory, = (0xff) x 65536;
89 89
90# populate mem with rom contents 90# populate mem with rom contents
91if ($VT102) { 91if ($VT102) {
… …
97} 97}
98 98
99############################################################################# 99#############################################################################
100# 8085 CPU registers and I/O support 100# 8085 CPU registers and I/O support
101 101
102my $PTY; # the pty we allocated, if any
103
104# 8080/8085 registers 102# 8080/8085 registers
105# b, c, d, e, h, l, a
106my ($A, $B, $C, $D, $E, $H, $L, $A); 103my ($A, $B, $C, $D, $E, $H, $L);
107my ($PC, $SP, $IFF, $FA, $FZ, $FS, $FP, $FC); 104my ($PC, $SP, $IFF, $FA, $FZ, $FS, $FP, $FC);
108 105
109my $RST = 0; # 8080 pending interrupts 106my $RST = 0; # 8080 pending interrupts
110my $INTMASK = 7; # 8085 half interrupts 107my $INTMASK = 7; # 8085 half interrupts
111my $INTPEND = 0; # 8085 half interrupts 108my $INTPEND = 0; # 8085 half interrupts
112
113my $x; # dummy temp for instructions
114 109
115my $CLK; # rather inexact clock 110my $CLK; # rather inexact clock
116 111
117############################################################################# 112#############################################################################
118# the dreaded NVR1400 chip. not needed to get it going, but provided anyway 113# the dreaded NVR1400 chip. not needed to get it going, but provided anyway
… …
132 sub { $NVR[$_[0]] = 0x3fff; }, # 5 erase 127 sub { $NVR[$_[0]] = 0x3fff; }, # 5 erase
133 sub { $NVRDATA = $NVR[$_[0]]; }, # 6 read 128 sub { $NVRDATA = $NVR[$_[0]]; }, # 6 read
134 sub { }, # 7 standby 129 sub { }, # 7 standby
135); 130);
136 131
137my @bitidx; 132my @NVR_BITIDX;
138$bitidx[1 << $_] = 9 - $_ for 0..9; 133$NVR_BITIDX[1 << $_] = 9 - $_ for 0..9;
139 134
140# the nvr1400 state machine. what a monster 135# the nvr1400 state machine. what a monster
141sub nvr() { 136sub nvr() {
142 my $a1 = $bitidx[(~$NVRADDR ) & 0x3ff]; 137 my $a1 = $NVR_BITIDX[(~$NVRADDR ) & 0x3ff];
143 my $a0 = $bitidx[(~$NVRADDR >> 10) & 0x3ff]; 138 my $a0 = $NVR_BITIDX[(~$NVRADDR >> 10) & 0x3ff];
144 139
145# printf "NVR %02x A %020b %d %d D %02x\n", $NVRLATCH, $NVRADDR & 0xfffff, $a1, $a0, $NVRDATA; 140# printf "NVR %02x A %020b %d %d D %02x\n", $NVRLATCH, $NVRADDR & 0xfffff, $a1, $a0, $NVRDATA;
146 141
147 $NVRCMD[($NVRLATCH >> 1) & 7]($a1 * 10 + $a0, $NVRLATCH & 1) 142 $NVRCMD[($NVRLATCH >> 1) & 7]($a1 * 10 + $a0, $NVRLATCH & 1)
148} 143}
… …
295sub in_1b { 0xff } # vt102 unknown 290sub in_1b { 0xff } # vt102 unknown
296 291
297############################################################################# 292#############################################################################
298# 8085 cpu opcodes and flag handling 293# 8085 cpu opcodes and flag handling
299 294
295my $x; # dummy scratchpad for opcodes
296
300sub sf { # set flags (ZSC - AP not implemented) 297sub sf { # set flags (ZSC - AP not implemented)
301 $FS = $_[0] & 0x080; 298 $FS = $_[0] & 0x080;
302 $FZ = !($_[0] & 0x0ff); 299 $FZ = !($_[0] & 0x0ff);
303 $FC = $_[0] & 0x100; 300 $FC = $_[0] & 0x100;
304 301
… …
487 $M[$PC], $op[$M[$PC]]; 484 $M[$PC], $op[$M[$PC]];
488} 485}
489 486
490############################################################################# 487#############################################################################
491# video emulation 488# video emulation
489
490binmode STDOUT;
492 491
493my @CHARMAP = ( 492my @CHARMAP = (
494 " " , "\x{29eb}", "\x{2592}", "\x{2409}", 493 " " , "\x{29eb}", "\x{2592}", "\x{2409}",
495 "\x{240c}", "\x{240d}", "\x{240a}", "\x{00b0}", 494 "\x{240c}", "\x{240d}", "\x{240a}", "\x{00b0}",
496 "\x{00b1}", "\x{2424}", "\x{240b}", "\x{2518}", 495 "\x{00b1}", "\x{2424}", "\x{240b}", "\x{2518}",
… …
801 # 6.5 vt125 mb7 read ready (something modem?) 800 # 6.5 vt125 mb7 read ready (something modem?)
802 # 7.5 vt125 mb7 vblank h(?) 801 # 7.5 vt125 mb7 vblank h(?)
803 # trap vt125 mbi init h(?) 802 # trap vt125 mbi init h(?)
804 my $vec; 803 my $vec;
805 804
806 $x = $INTPEND & ~$INTMASK; 805 my $pend = $INTPEND & ~$INTMASK;
807 806
808 if ($x & 1) { $vec = 0x2c; $INTPEND &= ~1; 807 if ($pend & 1) { $vec = 0x2c; $INTPEND &= ~1;
809 } elsif ($x & 2) { $vec = 0x34; $INTPEND &= ~2; 808 } elsif ($pend & 2) { $vec = 0x34; $INTPEND &= ~2;
810 } elsif ($x & 4) { $vec = 0x3c; $INTPEND &= ~4; 809 } elsif ($pend & 4) { $vec = 0x3c; $INTPEND &= ~4;
811# } elsif ($RST ) { $vec = $RST * 8; $RST = 0; # the vt102 firmware doesn't like combined interrupts 810# } elsif ($RST ) { $vec = $RST * 8; $RST = 0; # the vt102 firmware doesn't like combined interrupts
812 } elsif ($RST & 1) { $vec = 0x08; $RST &= ~1; # separate is better for vt102 811 } elsif ($RST & 1) { $vec = 0x08; $RST &= ~1; # separate is better for vt102
813 } elsif ($RST & 2) { $vec = 0x10; $RST &= ~2; 812 } elsif ($RST & 2) { $vec = 0x10; $RST &= ~2;
814 } elsif ($RST & 4) { $vec = 0x20; $RST &= ~4; 813 } elsif ($RST & 4) { $vec = 0x20; $RST &= ~4;
815 } else { 814 } else {

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