5 |
|
|
6 |
use Data::Dump qw/dump/; |
use Data::Dump qw/dump/; |
7 |
use Carp qw/confess/; |
use Carp qw/confess/; |
8 |
|
use Exporter 'import'; |
9 |
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our @EXPORT = qw'@mem $PC $A $P $X $Y $S $IPeriod'; |
10 |
|
|
11 |
=head1 NAME |
=head1 NAME |
12 |
|
|
34 |
=cut |
=cut |
35 |
|
|
36 |
sub init { |
sub init { |
37 |
warn "inside init\n"; |
my $self = shift; |
38 |
print "stdout\n"; |
warn dump(@_); |
39 |
|
warn "inside init low-level M6502 from $self\n"; |
40 |
}; |
}; |
41 |
|
|
42 |
=head2 read |
=head2 read |
83 |
$mem[$addr++] = $_ foreach @_; |
$mem[$addr++] = $_ foreach @_; |
84 |
} |
} |
85 |
|
|
86 |
|
=head2 write_chunk |
87 |
|
|
88 |
|
$emu->write_chunk( $address, $chunk_of_data ); |
89 |
|
|
90 |
|
=cut |
91 |
|
|
92 |
|
sub write_chunk { |
93 |
|
my ($self, $addr, $chunk) = @_; |
94 |
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my $len = length($chunk); |
95 |
|
splice @mem, $addr, $len, unpack('C*', $chunk); |
96 |
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} |
97 |
|
|
98 |
=head2 ram |
=head2 ram |
99 |
|
|
100 |
Read searies of bytes from memory without passing through MMU |
Read searies of bytes from memory without passing through MMU |
106 |
sub ram { |
sub ram { |
107 |
my $self = shift; |
my $self = shift; |
108 |
my ($from,$to) = @_; |
my ($from,$to) = @_; |
109 |
|
warn "ram($from,$to)\n"; |
110 |
if ($from + $to) { |
if ($from + $to) { |
111 |
printf "ram %04x - %04x\n", $from, $to; |
printf "ram %04x - %04x\n", $from, $to; |
112 |
return $mem[$from .. $to - 1]; |
return @mem[$from .. $to - 1]; |
113 |
} |
} |
114 |
printf "ram %04x\n", $from; |
printf "ram %04x\n", $from; |
115 |
return $mem[$from] if defined($from); |
return $mem[$from] if defined($from); |
116 |
confess "no from address"; |
confess "no from address"; |
117 |
} |
} |
118 |
|
|
119 |
|
=head2 push_R |
120 |
|
|
121 |
|
called by C<perl.c> to push changes in registars back to perl variables |
122 |
|
|
123 |
|
=cut |
124 |
|
|
125 |
|
sub push_R { |
126 |
|
warn "push_R(",dump(@_),")\n"; |
127 |
|
my ( $a, $p, $x, $y, $s, $pc ) = @_; |
128 |
|
$PC = $pc; |
129 |
|
$S=$s; $X=$x; $Y=$y; $P=$p; $A=$a; |
130 |
|
dump_R(); |
131 |
|
} |
132 |
|
|
133 |
|
=head2 dump_R |
134 |
|
|
135 |
|
helper function which dumps registers |
136 |
|
|
137 |
|
=cut |
138 |
|
|
139 |
|
sub dump_R { |
140 |
|
warn sprintf("PC: %04x A:%02x P:%02x X:%02x Y:%02x S:%02x\n", $PC, $A, $P, $X, $Y, $S); |
141 |
|
} |
142 |
|
|
143 |
1; |
1; |