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package Orao; |
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|
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use warnings; |
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use strict; |
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|
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use Carp qw/confess/; |
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use File::Slurp; |
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use Data::Dump qw/dump/; |
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use M6502; |
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use Screen; |
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|
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use base qw(Class::Accessor VRac M6502 Screen Prefs Tape Session); |
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#__PACKAGE__->mk_accessors(qw()); |
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|
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=head1 NAME |
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|
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Orao - Orao emulator |
18 |
|
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=head1 VERSION |
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|
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Version 0.06 |
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|
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=cut |
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|
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our $VERSION = '0.06'; |
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|
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=head1 SUMMARY |
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|
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Emulator for Orao 8-bit 6502 machine popular in Croatia (especially schools) |
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|
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=cut |
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|
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=head1 FUNCTIONS |
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|
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=head2 run |
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|
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Start emulator, open L<Screen>, load initial ROM images, and start emulator loop |
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|
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=cut |
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|
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our $emu; |
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|
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sub run { |
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my $self = shift; |
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|
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warn "Orao calling upstream init\n"; |
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$self->SUPER::init( |
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read => sub { $self->read( @_ ) }, |
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write => sub { $self->write( @_ ) }, |
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); |
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|
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warn "Orao $Orao::VERSION emulation starting\n"; |
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|
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warn "emulating ", $#mem, " bytes of memory\n"; |
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|
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# $self->scale( 2 ); |
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$self->show_mem( 1 ); |
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$self->load_session( 'sess/current' ); |
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|
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$self->open_screen; |
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$self->load_rom({ |
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# 0x1000 => 'dump/SCRINV.BIN', |
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# should be 0x6000, but oraoemu has 2 byte prefix |
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# 0x5FFE => '/home/dpavlin/orao/dump/screen.dmp', |
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# 0xC000 => 'rom/Orao/BAS12.ROM', |
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# 0xE000 => 'rom/Orao/CRT12.ROM', |
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0xC000 => 'rom/Orao/BAS13.ROM', |
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0xE000 => 'rom/Orao/CRT13.ROM', |
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}); |
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|
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# $PC = 0xDD11; # BC |
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# $PC = 0xC274; # MC |
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|
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$PC = 0xff89; |
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|
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$emu = $self; |
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|
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# $self->prompt( 0x1000 ); |
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|
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my ( $trace, $debug ) = ( $self->trace, $self->debug ); |
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$self->trace( 0 ); |
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$self->debug( 0 ); |
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|
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warn "rendering memory\n"; |
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$self->render_mem( @mem ); |
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|
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if ( $self->show_mem ) { |
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|
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my @mmap = ( |
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0x0000, 0x03FF, 'nulti blok', |
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0x0400, 0x5FFF, 'korisnièki RAM (23K)', |
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0x6000, 0x7FFF, 'video RAM', |
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0x8000, 0x9FFF, 'sistemske lokacije', |
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0xA000, 0xAFFF, 'ekstenzija', |
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0xB000, 0xBFFF, 'DOS', |
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0xC000, 0xDFFF, 'BASIC ROM', |
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0xE000, 0xFFFF, 'sistemski ROM', |
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); |
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|
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print "Orao memory map:"; |
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|
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while ( @mmap ) { |
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my ( $from, $to, $desc ) = splice(@mmap, 0, 3); |
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printf("%04x-%04x %s\n", $from, $to, $desc); |
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} |
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|
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} |
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|
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$self->trace( $trace ); |
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$self->debug( $debug ); |
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|
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warn "Orao boot finished", |
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$self->trace ? ' trace' : '', |
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$self->debug ? ' debug' : '', |
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"\n"; |
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|
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M6502::reset(); |
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|
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# $self->load_tape( '../oraoigre/bdash.tap' ); |
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|
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$self->loop( sub { |
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my $run_for = shift; |
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warn sprintf("about to exec from PC %04x for %d cycles\n", $PC, $run_for) if $self->trace; |
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M6502::exec( $run_for ); |
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$self->render_vram; |
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}); |
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}; |
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|
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|
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=head1 Helper functions |
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|
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=head2 write_chunk |
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|
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Write chunk directly into memory, updateing vram if needed |
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|
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$emu->write_chunk( 0x1000, $chunk_data ); |
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|
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=cut |
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|
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sub write_chunk { |
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my $self = shift; |
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my ( $addr, $chunk ) = @_; |
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$self->SUPER::write_chunk( $addr, $chunk ); |
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my $end = $addr + length($chunk); |
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my ( $f, $t ) = ( 0x6000, 0x7fff ); |
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|
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if ( $end < $f || $addr >= $t ) { |
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warn "skip vram update\n"; |
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return; |
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}; |
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|
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$f = $addr if ( $addr > $f ); |
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$t = $end if ( $end < $t ); |
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|
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warn sprintf("refresh video ram %04x-%04x\n", $f, $t); |
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$self->render_vram; |
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$self->render_mem( @mem ); |
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} |
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|
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=head2 load_image |
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|
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Load binary files, ROM images and Orao Emulator files |
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|
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$emu->load_image( '/path/to/file', 0x1000 ); |
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|
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Returns true on success. |
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|
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=cut |
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|
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sub load_image { |
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my $self = shift; |
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my ( $path, $addr ) = @_; |
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|
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if ( ! -e $path ) { |
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warn "ERROR: file $path doesn't exist\n"; |
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return; |
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} |
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|
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my $size = -s $path || confess "no size for $path: $!"; |
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|
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my $buff = read_file( $path ); |
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|
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if ( $size == 65538 ) { |
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$addr = 0; |
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warn sprintf "loading oraoemu 64k dump %s at %04x - %04x %02x\n", $path, $addr, $addr+$size-1, $size; |
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$self->write_chunk( $addr, substr($buff,2) ); |
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return 1; |
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} elsif ( $size == 32800 ) { |
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$addr = 0; |
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warn sprintf "loading oraoemu 1.3 dump %s at %04x - %04x %02x\n", $path, $addr, $addr+$size-1, $size; |
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$self->write_chunk( $addr, substr($buff,0x20) ); |
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return 1; |
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} |
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|
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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, $buff ); |
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return 1; |
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}; |
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|
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|
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=head1 Memory management |
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|
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Orao implements all I/O using mmap addresses. This was main reason why |
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L<Acme::6502> was just too slow to handle it. |
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|
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=cut |
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|
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=head2 read |
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|
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Read from memory |
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|
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$byte = read( $address ); |
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|
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=cut |
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|
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my $keyboard_none = 255; |
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|
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my $keyboard = { |
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0x87FC => { |
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'right' => 16, |
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'down' => 128, |
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'up' => 192, |
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'left' => 224, |
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'backspace' => 224, |
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}, |
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0x87FD => sub { |
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my $self = shift; |
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if ( $self->key_active('return') ) { |
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# M6502::_write( 0xfc, 13 ); |
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warn "return\n"; |
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return 0; |
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} elsif ( $self->key_active('left ctrl','right ctrl') ) { |
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warn "ctrl\n"; |
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return 16; |
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} |
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return $keyboard_none; |
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}, |
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0x87FA => { |
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'f4' => 16, |
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'f3' => 128, |
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'f2' => 192, |
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'f1' => 224, |
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}, |
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0x87FB => sub { |
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my $self = shift; |
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if ( $self->key_active('space') ) { |
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warn "space\n"; |
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return 32; |
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} elsif ( $self->key_active('left shift','right shift') ) { |
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warn "shift\n"; |
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return 16; |
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# } elsif ( $self->tape ) { |
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# warn "has tape!"; |
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# return 0; |
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} |
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return $keyboard_none; |
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}, |
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0x87F6 => { |
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'6' => 16, |
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't' => 128, |
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'y' => 192, # hr: z |
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'r' => 224, |
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}, |
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0x87F7 => { |
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'5' => 32, |
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'4' => 16, |
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}, |
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0x87EE => { |
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'7' => 16, |
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'u' => 128, |
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'i' => 192, |
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'o' => 224, |
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}, |
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0x87EF => { |
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'8' => 32, |
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'9' => 16, |
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}, |
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0x87DE => { |
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'1' => 16, |
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'w' => 128, |
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'q' => 192, |
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'e' => 224, |
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}, |
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0x87DF => { |
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'2' => 32, |
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'3' => 16, |
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}, |
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0x87BE => { |
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'm' => 16, |
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'k' => 128, |
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'j' => 192, |
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'l' => 224, |
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}, |
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0x87BF => { |
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',' => 32, # < |
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'.' => 16, # > |
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}, |
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0x877E => { |
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'z' => 16, # hr:y |
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's' => 128, |
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'a' => 192, |
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'd' => 224, |
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}, |
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0x877F => { |
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'x' => 32, |
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'c' => 16, |
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}, |
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0x86FE => { |
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'n' => 16, |
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'g' => 128, |
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'h' => 192, |
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'f' => 224, |
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}, |
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0x86FF => { |
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'b' => 32, |
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'v' => 16, |
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}, |
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0x85FE => { |
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'<' => 16, # : |
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'\\' => 128, # ¾ |
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'\'' => 192, # æ |
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';' => 224, # è |
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}, |
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0x85FF => { |
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'/' => 32, |
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'f11' => 16, # ^ |
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}, |
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0x83FE => { |
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'f12' => 16, # ; |
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'[' => 128, # ¹ |
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']' => 192, # ð |
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'p' => 224, |
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}, |
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0x83FF => { |
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'-' => 32, |
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'0' => 16, |
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}, |
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}; |
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|
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sub read { |
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my $self = shift; |
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my ($addr) = @_; |
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return if ( $addr > 0xffff ); |
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my $byte = $mem[$addr]; |
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confess sprintf("can't find memory at address %04x",$addr) unless defined($byte); |
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warn sprintf("# Orao::read(%04x) = %02x\n", $addr, $byte) if $self->trace; |
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|
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# keyboard |
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|
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if ( defined( $keyboard->{$addr} ) ) { |
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warn sprintf("keyboard port: %04x\n",$addr) if $self->trace; |
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|
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my $ret = $keyboard_none; |
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my $r = $keyboard->{$addr} || confess "no definition for keyboard port found"; |
355 |
if ( ref($r) eq 'CODE' ) { |
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$ret = $r->($self); |
357 |
} else { |
358 |
foreach my $k ( keys %$r ) { |
359 |
my $return = 0; |
360 |
if ( $self->key_active($k) ) { |
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warn "key '$k' is active\n"; |
362 |
$return ||= $r->{$k}; |
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} |
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$ret = $return if $return; |
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} |
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} |
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warn sprintf("keyboard port: %04x code: %d\n",$addr,$ret) if ( $ret != $keyboard_none ); |
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return $ret; |
369 |
} |
370 |
|
371 |
if ( $addr == 0x87ff ) { |
372 |
return $self->read_tape; |
373 |
} |
374 |
|
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$self->mmap_pixel( $addr, 0, $byte, 0 ) if $self->show_mem; |
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return $byte; |
377 |
} |
378 |
|
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=head2 write |
380 |
|
381 |
Write into emory |
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|
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write( $address, $byte ); |
384 |
|
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=cut |
386 |
|
387 |
sub write { |
388 |
my $self = shift; |
389 |
my ($addr,$byte) = @_; |
390 |
warn sprintf("# Orao::write(%04x,%02x)\n", $addr, $byte) if $self->trace; |
391 |
|
392 |
if ( $addr == 0x8800 ) { |
393 |
$self->write_tape( $byte ); |
394 |
warn sprintf "sound ignored: %x\n", $byte; |
395 |
} |
396 |
|
397 |
if ( $addr > 0xafff ) { |
398 |
confess sprintf "write access 0x%04x > 0xafff aborting\n", $addr; |
399 |
} |
400 |
|
401 |
$self->mmap_pixel( $addr, $byte, 0, 0 ) if $self->show_mem; |
402 |
$mem[$addr] = $byte; |
403 |
return; |
404 |
} |
405 |
|
406 |
=head1 Architecture specific |
407 |
|
408 |
=head2 render_vram |
409 |
|
410 |
Render one frame of video ram |
411 |
|
412 |
$self->render_vram; |
413 |
|
414 |
=cut |
415 |
|
416 |
sub render_vram { |
417 |
my $self = shift; |
418 |
|
419 |
my $pixels = pack("C*", map { $flip[$_] } @mem[ 0x6000 .. 0x7fff ]); |
420 |
|
421 |
my $vram = SDL::Surface->new( |
422 |
-width => 256, |
423 |
-height => 256, |
424 |
-depth => 1, # 1 bit per pixel |
425 |
-pitch => 32, # bytes per line |
426 |
-from => $pixels, |
427 |
); |
428 |
$vram->set_colors( 0, $black, $white ); |
429 |
|
430 |
$self->render_frame( $vram ); |
431 |
} |
432 |
|
433 |
=head2 cpu_PC |
434 |
|
435 |
Helper metod to set or get PC for current architecture |
436 |
|
437 |
=cut |
438 |
|
439 |
sub cpu_PC { |
440 |
my ( $self, $addr ) = @_; |
441 |
if ( defined($addr) ) { |
442 |
$PC = $addr; |
443 |
warn sprintf("running from PC %04x\n", $PC); |
444 |
}; |
445 |
return $PC; |
446 |
} |
447 |
|
448 |
=head1 SEE ALSO |
449 |
|
450 |
L<VRac>, L<M6502>, L<Screen>, L<Tape> |
451 |
|
452 |
=head1 AUTHOR |
453 |
|
454 |
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
455 |
|
456 |
=head1 ACKNOWLEDGEMENTS |
457 |
|
458 |
See also L<http://www.foing.hr/~fng_josip/orao.htm> which is source of all |
459 |
info about this machine (and even hardware implementation from 2007). |
460 |
|
461 |
=head1 COPYRIGHT & LICENSE |
462 |
|
463 |
Copyright 2007 Dobrica Pavlinusic, All Rights Reserved. |
464 |
|
465 |
This program is free software; you can redistribute it and/or modify it |
466 |
under the same terms as Perl itself. |
467 |
|
468 |
=cut |
469 |
|
470 |
1; # End of Orao |