/[VRac]/Orao.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 126 by dpavlin, Sat Aug 4 15:43:28 2007 UTC revision 165 by dpavlin, Mon Aug 6 07:04:40 2007 UTC
# Line 6  use strict; Line 6  use strict;
6  use Carp qw/confess/;  use Carp qw/confess/;
7  use File::Slurp;  use File::Slurp;
8  use Data::Dump qw/dump/;  use Data::Dump qw/dump/;
9  use M6502; # import @mem $PC and friends  use M6502;
10  use Screen qw/$white $black/;  use Screen;
11    
12  use base qw(Class::Accessor VRac M6502 Screen Prefs Tape);  use base qw(Class::Accessor VRac M6502 Screen Prefs Tape Session);
13  #__PACKAGE__->mk_accessors(qw());  #__PACKAGE__->mk_accessors(qw());
14    
15  =head1 NAME  =head1 NAME
# Line 18  Orao - Orao emulator Line 18  Orao - Orao emulator
18    
19  =head1 VERSION  =head1 VERSION
20    
21  Version 0.05  Version 0.06
22    
23  =cut  =cut
24    
25  our $VERSION = '0.05';  our $VERSION = '0.06';
26    
27  =head1 SUMMARY  =head1 SUMMARY
28    
29  Emulator or Orao 8-bit 6502 machine popular in Croatia  Emulator for Orao 8-bit 6502 machine popular in Croatia (especially schools)
30    
31  =cut  =cut
32    
33  =head1 FUNCTIONS  =head1 FUNCTIONS
34    
35  =head2 boot  =head2 run
   
 Start emulator, open L<Screen>, load initial ROM images, and render memory  
36    
37    my $emu = Orao->new({});  Start emulator, open L<Screen>, load initial ROM images, and start emulator loop
   $emu->boot;  
38    
39  =cut  =cut
40    
41  our $emu;  our $emu;
42    
43  select(STDERR); $| = 1;  sub run {
   
 sub boot {  
44          my $self = shift;          my $self = shift;
45    
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( @_ ) },
# Line 58  sub boot { Line 54  sub boot {
54          warn "emulating ", $#mem, " bytes of memory\n";          warn "emulating ", $#mem, " bytes of memory\n";
55    
56  #       $self->scale( 2 );  #       $self->scale( 2 );
57    #       $self->show_mem( 1 );
58            $self->load_session( 'session.pl' );
59    
60          $self->open_screen;          $self->open_screen;
61          $self->load_rom({          $self->load_rom({
# Line 83  sub boot { Line 81  sub boot {
81          $self->trace( 0 );          $self->trace( 0 );
82          $self->debug( 0 );          $self->debug( 0 );
83    
84          warn "rendering video memory\n";          warn "rendering memory\n";
85          $self->render_vram( @mem[ 0x6000 .. 0x7fff ] );          $self->render_mem( @mem );
86    
87          if ( $self->show_mem ) {          if ( $self->show_mem ) {
88    
                 warn "rendering memory map\n";  
   
                 $self->render_mem( @mem );  
   
89                  my @mmap = (                  my @mmap = (
90                          0x0000, 0x03FF, 'nulti blok',                          0x0000, 0x03FF, 'nulti blok',
91                          0x0400, 0x5FFF, 'korisnički RAM (23K)',                          0x0400, 0x5FFF, 'korisnički RAM (23K)',
# Line 103  sub boot { Line 97  sub boot {
97                          0xE000, 0xFFFF, 'sistemski ROM',                          0xE000, 0xFFFF, 'sistemski ROM',
98                  );                  );
99    
100                    print "Orao memory map:";
101    
102                    while ( @mmap ) {
103                            my ( $from, $to, $desc ) = splice(@mmap, 0, 3);
104                            printf("%04x-%04x %s\n", $from, $to, $desc);
105                    }
106    
107          }          }
108          $self->sync;  
109          $self->trace( $trace );          $self->trace( $trace );
110          $self->debug( $debug );          $self->debug( $debug );
111    
         #( $A, $P, $X, $Y, $S, $IPeriod ) = ( 1, 2, 3, 4, 5, 6 );  
   
112          warn "Orao boot finished",          warn "Orao boot finished",
113                  $self->trace ? ' trace' : '',                  $self->trace ? ' trace' : '',
114                  $self->debug ? ' debug' : '',                  $self->debug ? ' debug' : '',
# Line 117  sub boot { Line 116  sub boot {
116    
117          M6502::reset();          M6502::reset();
118    
         $self->booted( 1 );  
 }  
   
 =head2 run  
   
 Run interactive emulation loop  
   
   $emu->run;  
   
 =cut  
   
 sub run {  
         my $self = shift;  
   
         $self->boot if ( ! $self->booted );  
   
119  #       $self->load_tape( '../oraoigre/bdash.tap' );  #       $self->load_tape( '../oraoigre/bdash.tap' );
120    
121          $self->loop( sub {          $self->loop( sub {
122                  M6502::exec( $_[0] );                  my $run_for = shift;
123                    warn sprintf("about to exec from PC %04x for %d cycles\n", $PC, $run_for) if $self->trace;
124                    M6502::exec( $run_for );
125                  $self->render_vram;                  $self->render_vram;
126          });          });
127  };  };
128    
129    
130  =head1 Helper functions  =head1 Helper functions
131    
132    =head2 write_chunk
133    
134    Write chunk directly into memory, updateing vram if needed
135    
136      $emu->write_chunk( 0x1000, $chunk_data );
137    
138  =cut  =cut
139    
140  # write chunk directly into memory, updateing vram if needed  sub write_chunk {
 sub _write_chunk {  
141          my $self = shift;          my $self = shift;
142          my ( $addr, $chunk ) = @_;          my ( $addr, $chunk ) = @_;
143          $self->write_chunk( $addr, $chunk );          $self->SUPER::write_chunk( $addr, $chunk );
144          my $end = $addr + length($chunk);          my $end = $addr + length($chunk);
145          my ( $f, $t ) = ( 0x6000, 0x7fff );          my ( $f, $t ) = ( 0x6000, 0x7fff );
146    
# Line 162  sub _write_chunk { Line 153  sub _write_chunk {
153          $t = $end if ( $end < $t );          $t = $end if ( $end < $t );
154    
155          warn sprintf("refresh video ram %04x-%04x\n", $f, $t);          warn sprintf("refresh video ram %04x-%04x\n", $f, $t);
156          $self->render_vram( @mem[ 0x6000 .. 0x7fff ] );          $self->render_vram;
157          $self->render_mem( @mem ) if $self->show_mem;          $self->render_mem( @mem );
158  }  }
159    
160  =head2 load_image  =head2 load_image
# Line 192  sub load_image { Line 183  sub load_image {
183          if ( $size == 65538 ) {          if ( $size == 65538 ) {
184                  $addr = 0;                  $addr = 0;
185                  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;
186                  $self->_write_chunk( $addr, substr($buff,2) );                  $self->write_chunk( $addr, substr($buff,2) );
187                  return 1;                  return 1;
188          } elsif ( $size == 32800 ) {          } elsif ( $size == 32800 ) {
189                  $addr = 0;                  $addr = 0;
190                  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;
191                  $self->_write_chunk( $addr, substr($buff,0x20) );                  $self->write_chunk( $addr, substr($buff,0x20) );
192                  return 1;                  return 1;
193          }          }
         printf "loading %s at %04x - %04x %02x\n", $path, $addr, $addr+$size-1, $size;  
         $self->_write_chunk( $addr, $buff );  
         return 1;  
   
         my $chunk;  
   
         my $pos = 0;  
   
         while ( my $long = substr($buff,$pos,4) ) {  
                 my @b = split(//, $long, 4);  
                 $chunk .=  
                         ( $b[3] || '' ) .  
                         ( $b[2] || '' ) .  
                         ( $b[1] || '' ) .  
                         ( $b[0] || '' );  
                 $pos += 4;  
         }  
   
         $self->_write_chunk( $addr, $chunk );  
194    
195            printf "loading %s at %04x - %04x %02x\n", $path, $addr, $addr+$size-1, $size;
196            $self->write_chunk( $addr, $buff );
197          return 1;          return 1;
198  };  };
199    
# Line 365  my $keyboard = { Line 339  my $keyboard = {
339  sub read {  sub read {
340          my $self = shift;          my $self = shift;
341          my ($addr) = @_;          my ($addr) = @_;
342            return if ( $addr > 0xffff );
343          my $byte = $mem[$addr];          my $byte = $mem[$addr];
344          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);
345          warn sprintf("# Orao::read(%04x) = %02x\n", $addr, $byte) if $self->trace;          warn sprintf("# Orao::read(%04x) = %02x\n", $addr, $byte) if $self->trace;
# Line 397  sub read { Line 372  sub read {
372                  return $self->read_tape;                  return $self->read_tape;
373          }          }
374    
375          $self->mmap_pixel( $addr, 0, $byte, 0 );          $self->mmap_pixel( $addr, 0, $byte, 0 ) if $self->show_mem;
376          return $byte;          return $byte;
377  }  }
378    
# Line 415  sub write { Line 390  sub write {
390          warn sprintf("# Orao::write(%04x,%02x)\n", $addr, $byte) if $self->trace;          warn sprintf("# Orao::write(%04x,%02x)\n", $addr, $byte) if $self->trace;
391    
392          if ( $addr == 0x8800 ) {          if ( $addr == 0x8800 ) {
393                    $self->write_tape( $byte );
394                  warn sprintf "sound ignored: %x\n", $byte;                  warn sprintf "sound ignored: %x\n", $byte;
395          }          }
396    
# Line 422  sub write { Line 398  sub write {
398                  confess sprintf "write access 0x%04x > 0xafff aborting\n", $addr;                  confess sprintf "write access 0x%04x > 0xafff aborting\n", $addr;
399          }          }
400    
401          $self->mmap_pixel( $addr, $byte, 0, 0 );          $self->mmap_pixel( $addr, $byte, 0, 0 ) if $self->show_mem;
   
402          $mem[$addr] = $byte;          $mem[$addr] = $byte;
403          return;          return;
404  }  }
405    
406    =head1 Architecture specific
407    
408  =head2 render_vram  =head2 render_vram
409    
410  Render one frame of video ram  Render one frame of video ram
# Line 436  Render one frame of video ram Line 413  Render one frame of video ram
413    
414  =cut  =cut
415    
 my @flip;  
   
 foreach my $i ( 0 .. 255 ) {  
         my $t = 0;  
         $i & 0b00000001 and $t = $t | 0b10000000;  
         $i & 0b00000010 and $t = $t | 0b01000000;  
         $i & 0b00000100 and $t = $t | 0b00100000;  
         $i & 0b00001000 and $t = $t | 0b00010000;  
         $i & 0b00010000 and $t = $t | 0b00001000;  
         $i & 0b00100000 and $t = $t | 0b00000100;  
         $i & 0b01000000 and $t = $t | 0b00000010;  
         $i & 0b10000000 and $t = $t | 0b00000001;  
         #warn "$i = $t\n";  
         $flip[$i] = $t;  
 }  
   
   
416  sub render_vram {  sub render_vram {
417          my $self = shift;          my $self = shift;
418    
         return unless $self->booted;  
   
419          my $pixels = pack("C*", map { $flip[$_] } @mem[ 0x6000 .. 0x7fff ]);          my $pixels = pack("C*", map { $flip[$_] } @mem[ 0x6000 .. 0x7fff ]);
420    
421          my $vram = SDL::Surface->new(          my $vram = SDL::Surface->new(
# Line 472  sub render_vram { Line 430  sub render_vram {
430          $self->render_frame( $vram );          $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  =head1 AUTHOR
453    
454  Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>  Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
455    
 =head1 BUGS  
   
456  =head1 ACKNOWLEDGEMENTS  =head1 ACKNOWLEDGEMENTS
457    
458  See also L<http://www.foing.hr/~fng_josip/orao.htm> which is source of all  See also L<http://www.foing.hr/~fng_josip/orao.htm> which is source of all
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