/[VRac]/M6502/M6502.pm
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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revision 68 by dpavlin, Tue Jul 31 17:15:54 2007 UTC revision 74 by dpavlin, Tue Jul 31 23:48:19 2007 UTC
# Line 6  use warnings; Line 6  use warnings;
6  use Data::Dump qw/dump/;  use Data::Dump qw/dump/;
7  use Carp qw/confess/;  use Carp qw/confess/;
8  use Exporter 'import';  use Exporter 'import';
9  our @EXPORT = qw'@mem $PC $A $P $X $Y $S $IPeriod $run_for $debug';  our @EXPORT = qw'@mem $PC $A $P $X $Y $S $IPeriod $ICount $IRequest $IAutoReset $TrapBadOps $Trap $Trace $run_for $debug';
10    
11  =head1 NAME  =head1 NAME
12    
# Line 24  our @mem = (0xff) x 0x10000;   # 64M Line 24  our @mem = (0xff) x 0x10000;   # 64M
24  our $PC = 0xbeef;  our $PC = 0xbeef;
25  # CPU registars  # CPU registars
26  our ( $A, $P, $X, $Y, $S ) = (0) x 5;  our ( $A, $P, $X, $Y, $S ) = (0) x 5;
27  # Set IPeriod to number of CPU cycles between calls to Loop6502  
28  our $IPeriod = 1;  our $IPeriod=1;         # Set IPeriod to number of CPU cycles between calls to Loop6502
29    our $ICount;
30    our $IRequest;          # Set to the INT_IRQ when pending IRQ
31    our $IAutoReset;        # Set to 1 to autom. reset IRequest
32    our $TrapBadOps=1;      # Set to 1 to warn of illegal opcodes
33    our $Trap;                      # Set Trap to address to trace from
34    our $Trace;                     # Set Trace=1 to start tracing
35    
36  # Exec6502 cycles  # Exec6502 cycles
37  our $run_for = 0;  our $run_for = 0;
38    
# Line 137  called by C<perl.c> to push changes in r Line 144  called by C<perl.c> to push changes in r
144    
145  sub push_R {  sub push_R {
146          warn "## M6502::push_R(",dump(@_),")\n" if $debug;          warn "## M6502::push_R(",dump(@_),")\n" if $debug;
147          my ( $a, $p, $x, $y, $s, $pc ) = @_;          ( $A, $P, $X, $Y, $S, $PC, $IPeriod, $ICount, $IRequest, $IAutoReset, $TrapBadOps, $Trap, $Trace ) = @_;
         $PC = $pc;  
         $S=$s; $X=$x; $Y=$y; $P=$p; $A=$a;  
148          dump_R();          dump_R();
149  }  }
150    
# Line 152  helper function which dumps registers in Line 157  helper function which dumps registers in
157  =cut  =cut
158    
159  sub dump_R {  sub dump_R {
160          my $dump = sprintf(" PC: %04x A:%02x P:%02x X:%02x Y:%02x S:%02x\n", $PC, $A, $P, $X, $Y, $S);          my $dump = sprintf(" PC: %04x A:%02x P:%02x X:%02x Y:%02x S:%02x "
161                    . "IPeriod:%d ICount:%d IRequest:%02x IAutoReset:%02x TrapBadOps:%d Trap:%d Trace:%d"
162                    . "\n",
163                    $PC, $A, $P, $X, $Y, $S, $IPeriod, $ICount, $IRequest, $IAutoReset, $TrapBadOps, $Trap, $Trace,
164            );
165          warn "## M6502::dump_R $dump" if $debug;          warn "## M6502::dump_R $dump" if $debug;
166          return $dump;          return $dump;
167  }  }
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