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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; |
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use lib './lib'; |
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#use Time::HiRes qw(time); |
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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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|
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use base qw(Class::Accessor M6502 Screen); |
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__PACKAGE__->mk_accessors(qw(debug trace run_for mem_dump trace)); |
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|
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=head1 NAME |
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|
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Orao - Orao emulator |
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|
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=head1 VERSION |
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|
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Version 0.02 |
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|
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=cut |
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|
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our $VERSION = '0.02'; |
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|
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=head1 SUMMARY |
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|
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Emulator or Orao 8-bit 6502 machine popular in Croatia |
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|
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=cut |
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|
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=head2 init |
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|
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Start emulator |
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|
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=cut |
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|
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our $orao; |
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|
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select(STDERR); $| = 1; |
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|
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sub init { |
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my $self = shift; |
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warn "Orao calling upstream init\n"; |
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$self->SUPER::init( $self, @_ ); |
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|
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warn "staring Orao $Orao::VERSION emulation\n"; |
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|
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$self->open_screen; |
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$self->load_rom({ |
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0x1000 => 'dump/SCRINV.BIN', |
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0xC000 => 'rom/BAS12.ROM', |
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0xE000 => 'rom/CRT12.ROM', |
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}); |
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|
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$PC = 0xDD11; # BC |
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# $PC = 0xC274; # MC |
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|
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$orao = $self; |
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|
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# $self->prompt( 0x1000 ); |
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|
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my $trace = $self->trace; |
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$self->trace( 0 ); |
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|
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if ( $self->show_mem ) { |
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|
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warn "rendering memory map\n"; |
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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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foreach my $i ( 0 .. $#mmap / 3 ) { |
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my $o = $i * 3; |
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my ( $from, $to, $desc ) = @mmap[$o,$o+1,$o+2]; |
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printf "%04x - %04x - %s\n", $from, $to, $desc; |
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for my $a ( $from .. $to ) { |
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if ( $a >= 0x6000 && $a < 0x8000 ) { |
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my $b = $self->read( $a ); |
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$self->vram( $a - 0x6000, $b ); |
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} else { |
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$self->read( $a ); |
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} |
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} |
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} |
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|
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} else { |
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|
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warn "rendering video memory\n"; |
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for my $a ( 0x6000 .. 0x7fff ) { |
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$self->vram( $a - 0x6000, $mem[$a] ); |
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} |
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|
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} |
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$self->sync; |
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$self->trace( $trace ); |
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|
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#( $A, $P, $X, $Y, $S, $IPeriod ) = ( 1, 2, 3, 4, 5, 6 ); |
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|
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warn "Orao init finished", $self->trace ? ' trace on' : '', "\n"; |
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|
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} |
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|
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=head2 load_rom |
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|
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called to init memory and load initial rom images |
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|
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$orao->load_rom; |
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|
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=cut |
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|
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sub load_rom { |
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my ($self, $loaded_files) = @_; |
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|
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#my $time_base = time(); |
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|
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foreach my $addr ( sort keys %$loaded_files ) { |
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my $path = $loaded_files->{$addr}; |
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$self->load_oraoemu( $path, $addr ); |
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} |
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} |
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|
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|
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=head2 load_oraoemu |
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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->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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foreach my $a ( $f .. $t ) { |
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$self->vram( $a - 0x6000 , $mem[ $a ] ); |
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} |
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} |
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|
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sub load_oraoemu { |
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my $self = shift; |
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my ( $path, $addr ) = @_; |
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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; |
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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; |
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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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return $self->_write_chunk( $addr, $buff ); |
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|
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my $chunk; |
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|
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my $pos = 0; |
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|
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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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|
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$self->_write_chunk( $addr, $chunk ); |
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|
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}; |
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|
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=head2 save_dump |
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|
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$orao->save_dump( 'filename', $from, $to ); |
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|
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=cut |
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|
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sub save_dump { |
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my $self = shift; |
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|
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my ( $path, $from, $to ) = @_; |
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|
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$from ||= 0; |
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$to ||= 0xffff; |
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|
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open(my $fh, '>', $path) || die "can't open $path: $!"; |
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print $fh $self->read_chunk( $from, $to ); |
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close($fh); |
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|
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my $size = -s $path; |
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warn sprintf "saved %s %d %x bytes\n", $path, $size, $size; |
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} |
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|
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=head2 hexdump |
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|
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$orao->hexdump( $address ); |
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|
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=cut |
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|
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sub hexdump { |
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my $self = shift; |
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my $a = shift; |
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return sprintf(" %04x %s\n", $a, |
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join(" ", |
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map { |
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sprintf( "%02x", $_ ) |
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} $self->ram( $a, $a+8 ) |
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) |
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); |
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} |
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|
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=head2 prompt |
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|
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$orao->prompt( $address, $last_command ); |
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|
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=cut |
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|
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sub prompt { |
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my $self = shift; |
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$self->app->sync; |
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my $a = shift; |
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my $last = shift; |
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print STDERR $self->hexdump( $a ), |
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$last ? "[$last] " : '', |
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"> "; |
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my $in = <STDIN>; |
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chomp($in); |
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$in ||= $last; |
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$last = $in; |
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return split(/\s+/, $in) if $in; |
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} |
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|
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=head1 Memory management |
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|
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Orao implements all I/O using mmap addresses. This was main reason why |
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L<Acme::6502> was just too slow to handle it. |
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|
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=cut |
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|
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=head2 read |
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|
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Read from memory |
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|
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$byte = read( $address ); |
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|
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=cut |
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|
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sub read { |
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my $self = shift; |
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my ($addr) = @_; |
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my $byte = $mem[$addr]; |
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warn sprintf("# Orao::read(%04x) = %02x\n", $addr, $byte) if $self->trace; |
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$self->mmap_pixel( $addr, 0, $byte, 0 ); |
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return $byte; |
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} |
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|
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=head2 write |
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|
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Write into emory |
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|
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write( $address, $byte ); |
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|
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=cut |
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|
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sub write { |
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my $self = shift; |
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my ($addr,$byte) = @_; |
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warn sprintf("# Orao::write(%04x,%02x)\n", $addr, $byte) if $self->trace; |
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|
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if ( $addr >= 0x6000 && $addr < 0x8000 ) { |
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$self->vram( $addr - 0x6000 , $byte ); |
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} |
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|
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if ( $addr > 0xafff ) { |
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warn sprintf "access to %04x above affff aborting\n", $addr; |
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return -1; |
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} |
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if ( $addr == 0x8800 ) { |
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warn sprintf "sound ignored: %x\n", $byte; |
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} |
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|
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$self->mmap_pixel( $addr, $byte, 0, 0 ); |
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|
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$mem[$addr] = $byte; |
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return; |
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} |
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|
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=head1 Command Line |
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|
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Command-line debugging intrerface is implemented for communication with |
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emulated device |
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|
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=head2 cli |
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|
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$orao->cli(); |
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|
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=cut |
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|
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my $last = 'r 1'; |
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|
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sub cli { |
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my $self = shift; |
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my $a = $PC || confess "no pc?"; |
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while ( my @v = $self->prompt( $a, $last ) ) { |
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my $c = shift @v; |
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my $v = shift @v; |
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$v = hex($v) if $v && $v =~ m/^[0-9a-f]+$/; |
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printf "## [%s] %s\n", ($v || 'undef'), join(",",@v) if $self->debug; |
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@v = map { hex($_) } @v; |
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if ( $c =~ m/^[qx]/i ) { |
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exit; |
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} elsif ( $c eq '?' ) { |
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warn <<__USAGE__; |
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uage: |
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x|q\t\texit |
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e 6000 6010\tdump memory, +/- to walk forward/backward |
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m 1000 ff 00\tput ff 00 on 1000 |
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j|u 1000\t\tjump (change pc) |
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r 42\t\trun 42 instruction opcodes |
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__USAGE__ |
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} elsif ( $c =~ m/^e/i ) { |
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$a ||= $v; |
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my $to = shift @v; |
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$to = $a + 32 if ( ! $to || $to <= $a ); |
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my $lines = int( ($to - $a - 8) / 8 ); |
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printf "## m %04x %04x lines: %d\n", $a, $to, $lines; |
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while ( $lines ) { |
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print $self->hexdump( $a ); |
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$a += 8; |
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$lines--; |
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} |
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$last = '+'; |
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} elsif ( $c =~ m/^\+/ ) { |
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$a += 8; |
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} elsif ( $c =~ m/^\-/ ) { |
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$a -= 8; |
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} elsif ( $c =~ m/^m/i ) { |
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$a = $v; |
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$self->poke_code( $a, @v ); |
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printf "poke %d bytes at %04x\n", $#v + 1, $a; |
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} elsif ( $c =~ m/^l/i ) { |
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my $to = shift @v || 0x1000; |
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$a = $to; |
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$self->load_oraoemu( $v, $a ); |
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} elsif ( $c =~ m/^s/i ) { |
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$self->save_dump( $v || 'mem.dump', @v ); |
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} elsif ( $c =~ m/^r/i ) { |
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$run_for = $v || 1; |
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print "run_for $run_for instructions\n"; |
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last; |
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} elsif ( $c =~ m/^(u|j)/ ) { |
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my $to = $v || $a; |
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printf "set pc to %04x\n", $to; |
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$PC = $to; # remember for restart |
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$run_for = 1; |
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last; |
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} elsif ( $c =~ m/^t/ ) { |
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$self->trace( not $self->trace ); |
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print "trace ", $self->trace ? 'on' : 'off', "\n"; |
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} else { |
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warn "# ignore $c\n"; |
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last; |
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} |
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} |
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|
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|
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} |
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|
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=head1 AUTHOR |
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|
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Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
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|
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=head1 BUGS |
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|
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=head1 ACKNOWLEDGEMENTS |
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|
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See also L<http://www.foing.hr/~fng_josip/orao.htm> which is source of all |
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info about this machine (and even hardware implementation from 2007). |
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|
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=head1 COPYRIGHT & LICENSE |
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|
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Copyright 2007 Dobrica Pavlinusic, All Rights Reserved. |
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|
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This program is free software; you can redistribute it and/or modify it |
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under the same terms as Perl itself. |
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|
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=cut |
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|
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1; # End of Orao |
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