32 |
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33 |
=head1 FUNCTIONS |
=head1 FUNCTIONS |
34 |
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35 |
=head2 boot |
=head2 run |
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Start emulator, open L<Screen>, load initial ROM images, and render memory |
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36 |
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37 |
my $emu = Orao->new({}); |
Start emulator, open L<Screen>, load initial ROM images, and start emulator loop |
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$emu->boot; |
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38 |
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39 |
=cut |
=cut |
40 |
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41 |
our $emu; |
our $emu; |
42 |
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43 |
select(STDERR); $| = 1; |
sub run { |
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sub boot { |
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44 |
my $self = shift; |
my $self = shift; |
45 |
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46 |
warn "Orao calling upstream init\n"; |
warn "Orao calling upstream init\n"; |
47 |
$self->SUPER::init( |
$self->SUPER::init( |
48 |
read => sub { $self->read( @_ ) }, |
read => sub { $self->read( @_ ) }, |
80 |
$self->debug( 0 ); |
$self->debug( 0 ); |
81 |
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82 |
warn "rendering video memory\n"; |
warn "rendering video memory\n"; |
83 |
$self->render_vram( @mem[ 0x6000 .. 0x7fff ] ); |
$self->render_vram; |
84 |
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85 |
if ( $self->show_mem ) { |
if ( $self->show_mem ) { |
86 |
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113 |
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114 |
M6502::reset(); |
M6502::reset(); |
115 |
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$self->booted( 1 ); |
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} |
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=head2 run |
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Run interactive emulation loop |
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$emu->run; |
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=cut |
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sub run { |
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my $self = shift; |
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$self->boot if ( ! $self->booted ); |
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116 |
# $self->load_tape( '../oraoigre/bdash.tap' ); |
# $self->load_tape( '../oraoigre/bdash.tap' ); |
117 |
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118 |
$self->loop( sub { |
$self->loop( sub { |
119 |
M6502::exec( $_[0] ); |
my $run_for = shift; |
120 |
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# warn sprintf("about to exec from PC %04x for %d cycles\n", $PC, $run_for); |
121 |
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M6502::exec( $run_for ); |
122 |
$self->render_vram; |
$self->render_vram; |
123 |
}); |
}); |
124 |
}; |
}; |
125 |
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126 |
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127 |
=head1 Helper functions |
=head1 Helper functions |
128 |
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129 |
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=head2 write_chunk |
130 |
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131 |
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Write chunk directly into memory, updateing vram if needed |
132 |
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133 |
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$emu->write_chunk( 0x1000, $chunk_data ); |
134 |
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135 |
=cut |
=cut |
136 |
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137 |
# write chunk directly into memory, updateing vram if needed |
sub write_chunk { |
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sub _write_chunk { |
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138 |
my $self = shift; |
my $self = shift; |
139 |
my ( $addr, $chunk ) = @_; |
my ( $addr, $chunk ) = @_; |
140 |
$self->write_chunk( $addr, $chunk ); |
$self->SUPER::write_chunk( $addr, $chunk ); |
141 |
my $end = $addr + length($chunk); |
my $end = $addr + length($chunk); |
142 |
my ( $f, $t ) = ( 0x6000, 0x7fff ); |
my ( $f, $t ) = ( 0x6000, 0x7fff ); |
143 |
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150 |
$t = $end if ( $end < $t ); |
$t = $end if ( $end < $t ); |
151 |
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152 |
warn sprintf("refresh video ram %04x-%04x\n", $f, $t); |
warn sprintf("refresh video ram %04x-%04x\n", $f, $t); |
153 |
$self->render_vram( @mem[ 0x6000 .. 0x7fff ] ); |
$self->render_vram; |
154 |
$self->render_mem( @mem ) if $self->show_mem; |
$self->render_mem( @mem ) if $self->show_mem; |
155 |
} |
} |
156 |
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180 |
if ( $size == 65538 ) { |
if ( $size == 65538 ) { |
181 |
$addr = 0; |
$addr = 0; |
182 |
warn sprintf "loading oraoemu 64k dump %s at %04x - %04x %02x\n", $path, $addr, $addr+$size-1, $size; |
warn sprintf "loading oraoemu 64k dump %s at %04x - %04x %02x\n", $path, $addr, $addr+$size-1, $size; |
183 |
$self->_write_chunk( $addr, substr($buff,2) ); |
$self->write_chunk( $addr, substr($buff,2) ); |
184 |
return 1; |
return 1; |
185 |
} elsif ( $size == 32800 ) { |
} elsif ( $size == 32800 ) { |
186 |
$addr = 0; |
$addr = 0; |
187 |
warn sprintf "loading oraoemu 1.3 dump %s at %04x - %04x %02x\n", $path, $addr, $addr+$size-1, $size; |
warn sprintf "loading oraoemu 1.3 dump %s at %04x - %04x %02x\n", $path, $addr, $addr+$size-1, $size; |
188 |
$self->_write_chunk( $addr, substr($buff,0x20) ); |
$self->write_chunk( $addr, substr($buff,0x20) ); |
189 |
return 1; |
return 1; |
190 |
} |
} |
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printf "loading %s at %04x - %04x %02x\n", $path, $addr, $addr+$size-1, $size; |
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$self->_write_chunk( $addr, $buff ); |
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return 1; |
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my $chunk; |
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my $pos = 0; |
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while ( my $long = substr($buff,$pos,4) ) { |
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my @b = split(//, $long, 4); |
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$chunk .= |
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( $b[3] || '' ) . |
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( $b[2] || '' ) . |
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( $b[1] || '' ) . |
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( $b[0] || '' ); |
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$pos += 4; |
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} |
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$self->_write_chunk( $addr, $chunk ); |
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191 |
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192 |
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printf "loading %s at %04x - %04x %02x\n", $path, $addr, $addr+$size-1, $size; |
193 |
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$self->write_chunk( $addr, $buff ); |
194 |
return 1; |
return 1; |
195 |
}; |
}; |
196 |
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336 |
sub read { |
sub read { |
337 |
my $self = shift; |
my $self = shift; |
338 |
my ($addr) = @_; |
my ($addr) = @_; |
339 |
my $byte = $mem[$addr]; |
return if ( $addr > 0xffff ); |
340 |
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my $byte = @mem[$addr]; |
341 |
confess sprintf("can't find memory at address %04x",$addr) unless defined($byte); |
confess sprintf("can't find memory at address %04x",$addr) unless defined($byte); |
342 |
warn sprintf("# Orao::read(%04x) = %02x\n", $addr, $byte) if $self->trace; |
warn sprintf("# Orao::read(%04x) = %02x\n", $addr, $byte) if $self->trace; |
343 |
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428 |
sub render_vram { |
sub render_vram { |
429 |
my $self = shift; |
my $self = shift; |
430 |
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return unless $self->booted; |
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431 |
my $pixels = pack("C*", map { $flip[$_] } @mem[ 0x6000 .. 0x7fff ]); |
my $pixels = pack("C*", map { $flip[$_] } @mem[ 0x6000 .. 0x7fff ]); |
432 |
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433 |
my $vram = SDL::Surface->new( |
my $vram = SDL::Surface->new( |
442 |
$self->render_frame( $vram ); |
$self->render_frame( $vram ); |
443 |
} |
} |
444 |
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445 |
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=head2 cpu_PC |
446 |
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447 |
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=cut |
448 |
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449 |
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sub cpu_PC { |
450 |
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my ( $self, $addr ) = @_; |
451 |
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if ( defined($addr) ) { |
452 |
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$PC = $addr; |
453 |
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warn sprintf("running from PC %04x\n", $PC); |
454 |
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}; |
455 |
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return $PC; |
456 |
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} |
457 |
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458 |
=head1 AUTHOR |
=head1 AUTHOR |
459 |
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460 |
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |