1 |
dpavlin |
174 |
package Galeb; |
2 |
|
|
|
3 |
|
|
use warnings; |
4 |
|
|
use strict; |
5 |
|
|
|
6 |
|
|
use Carp qw/confess/; |
7 |
|
|
use File::Slurp; |
8 |
|
|
use Data::Dump qw/dump/; |
9 |
|
|
use M6502; |
10 |
|
|
use Screen; |
11 |
|
|
|
12 |
|
|
use base qw(Class::Accessor VRac M6502 Screen Prefs Session); |
13 |
|
|
#__PACKAGE__->mk_accessors(qw()); |
14 |
|
|
|
15 |
|
|
=head1 NAME |
16 |
|
|
|
17 |
|
|
Galeb - Galeb emulator |
18 |
|
|
|
19 |
|
|
=head1 VERSION |
20 |
|
|
|
21 |
|
|
Version 0.00 |
22 |
|
|
|
23 |
|
|
=cut |
24 |
|
|
|
25 |
|
|
our $VERSION = '0.00'; |
26 |
|
|
|
27 |
|
|
=head1 SUMMARY |
28 |
|
|
|
29 |
|
|
Emulator for Galeb 8-bit 6502 machine from Croatia |
30 |
|
|
|
31 |
|
|
=cut |
32 |
|
|
|
33 |
|
|
=head1 FUNCTIONS |
34 |
|
|
|
35 |
|
|
=head2 run |
36 |
|
|
|
37 |
|
|
Start emulator, open L<Screen>, load initial ROM images, and start emulator loop |
38 |
|
|
|
39 |
|
|
=cut |
40 |
|
|
|
41 |
|
|
our $emu; |
42 |
|
|
|
43 |
|
|
sub run { |
44 |
|
|
my $self = shift; |
45 |
|
|
|
46 |
dpavlin |
214 |
M6502::reset(); |
47 |
|
|
|
48 |
dpavlin |
174 |
warn "Galeb calling upstream init\n"; |
49 |
|
|
$self->SUPER::init( |
50 |
|
|
read => sub { $self->read( @_ ) }, |
51 |
|
|
write => sub { $self->write( @_ ) }, |
52 |
|
|
); |
53 |
|
|
|
54 |
|
|
warn "Galeb $Galeb::VERSION emulation starting\n"; |
55 |
|
|
|
56 |
dpavlin |
188 |
# $self->scale( 2 ); |
57 |
dpavlin |
174 |
$self->show_mem( 1 ); |
58 |
|
|
$self->load_session( 'sess/current' ); |
59 |
|
|
|
60 |
|
|
$self->open_screen; |
61 |
|
|
$self->load_rom({ |
62 |
|
|
0xc000 => 'rom/Galeb/BAS01.rom', |
63 |
|
|
0xc800 => 'rom/Galeb/BAS02.rom', |
64 |
|
|
0xd000 => 'rom/Galeb/BAS03.rom', |
65 |
|
|
0xd800 => 'rom/Galeb/BAS04.rom', |
66 |
|
|
0xf000 => 'rom/Galeb/EXMD.rom', |
67 |
|
|
0xf800 => 'rom/Galeb/MAKbug.rom', |
68 |
|
|
}); |
69 |
|
|
|
70 |
|
|
$PC = $mem[ 0xfffc ]; |
71 |
|
|
warn sprintf("starting from address at 0xfffc = 0x%04x", $PC); |
72 |
|
|
|
73 |
|
|
$emu = $self; |
74 |
|
|
|
75 |
dpavlin |
188 |
# $self->trace( 1 ); |
76 |
|
|
# $self->debug( 1 ); |
77 |
dpavlin |
174 |
|
78 |
|
|
warn "rendering memory\n"; |
79 |
|
|
$self->render_mem( @mem ); |
80 |
|
|
|
81 |
|
|
$self->loop( sub { |
82 |
|
|
my $run_for = shift; |
83 |
|
|
warn sprintf("about to exec from PC %04x for %d cycles\n", $PC, $run_for) if $self->trace; |
84 |
|
|
M6502::exec( $run_for ); |
85 |
|
|
$self->render_vram; |
86 |
|
|
}); |
87 |
|
|
}; |
88 |
|
|
|
89 |
|
|
|
90 |
|
|
=head1 Helper functions |
91 |
|
|
|
92 |
|
|
=head2 load_image |
93 |
|
|
|
94 |
|
|
Load binary files, ROM images and Galeb Emulator files |
95 |
|
|
|
96 |
|
|
$emu->load_image( '/path/to/file', 0x1000 ); |
97 |
|
|
|
98 |
|
|
Returns true on success. |
99 |
|
|
|
100 |
|
|
=cut |
101 |
|
|
|
102 |
|
|
sub load_image { |
103 |
|
|
my $self = shift; |
104 |
|
|
my ( $path, $addr ) = @_; |
105 |
|
|
|
106 |
|
|
if ( ! -e $path ) { |
107 |
|
|
warn "ERROR: file $path doesn't exist\n"; |
108 |
|
|
return; |
109 |
|
|
} |
110 |
|
|
|
111 |
|
|
my $size = -s $path || confess "no size for $path: $!"; |
112 |
|
|
|
113 |
|
|
my $buff = read_file( $path ); |
114 |
|
|
|
115 |
|
|
if ( $size == 65567 ) { |
116 |
|
|
$addr = 0; |
117 |
|
|
warn sprintf "loading Galaksija emulator 64k dump %s at %04x - %04x %02x\n", $path, $addr, $addr+$size-1, $size; |
118 |
|
|
$self->write_chunk( $addr, substr($buff,0x20) ); |
119 |
|
|
return 1; |
120 |
|
|
} |
121 |
|
|
|
122 |
|
|
printf "loading %s at %04x - %04x %02x\n", $path, $addr, $addr+$size-1, $size; |
123 |
|
|
$self->write_chunk( $addr, $buff ); |
124 |
|
|
return 1; |
125 |
|
|
}; |
126 |
|
|
|
127 |
|
|
|
128 |
|
|
=head1 Memory management |
129 |
|
|
|
130 |
|
|
=cut |
131 |
|
|
|
132 |
|
|
=head2 read |
133 |
|
|
|
134 |
|
|
Read from memory |
135 |
|
|
|
136 |
|
|
$byte = read( $address ); |
137 |
|
|
|
138 |
|
|
=cut |
139 |
|
|
|
140 |
|
|
sub read { |
141 |
|
|
my $self = shift; |
142 |
|
|
my ($addr) = @_; |
143 |
|
|
return if ( $addr > 0xffff ); |
144 |
|
|
my $byte = $mem[$addr]; |
145 |
|
|
confess sprintf("can't find memory at address %04x",$addr) unless defined($byte); |
146 |
|
|
warn sprintf("# Galeb::read(%04x) = %02x\n", $addr, $byte) if $self->trace; |
147 |
|
|
|
148 |
|
|
$self->mmap_pixel( $addr, 0, $byte, 0 ) if $self->show_mem; |
149 |
|
|
return $byte; |
150 |
|
|
} |
151 |
|
|
|
152 |
|
|
=head2 write |
153 |
|
|
|
154 |
|
|
Write into emory |
155 |
|
|
|
156 |
|
|
write( $address, $byte ); |
157 |
|
|
|
158 |
|
|
=cut |
159 |
|
|
|
160 |
|
|
sub write { |
161 |
|
|
my $self = shift; |
162 |
|
|
my ($addr,$byte) = @_; |
163 |
|
|
warn sprintf("# Galeb::write(%04x,%02x)\n", $addr, $byte) if $self->trace; |
164 |
|
|
|
165 |
|
|
if ( $addr > 0xc000 ) { |
166 |
|
|
confess sprintf "write access 0x%04x > 0xc000 aborting\n", $addr; |
167 |
|
|
} |
168 |
|
|
|
169 |
|
|
$self->mmap_pixel( $addr, $byte, 0, 0 ) if $self->show_mem; |
170 |
|
|
$mem[$addr] = $byte; |
171 |
|
|
return; |
172 |
|
|
} |
173 |
|
|
|
174 |
|
|
=head1 Architecture specific |
175 |
|
|
|
176 |
|
|
=head2 render_vram |
177 |
|
|
|
178 |
|
|
Render one frame of video ram |
179 |
|
|
|
180 |
|
|
$self->render_vram; |
181 |
|
|
|
182 |
|
|
=cut |
183 |
|
|
|
184 |
dpavlin |
188 |
my $char_rom = 'rom/Galeb/CHRGEN.rom'; |
185 |
|
|
|
186 |
dpavlin |
189 |
# flip, invert |
187 |
|
|
my @chars = map { $flip[ ord($_) ] ^ 0xff } split(//, read_file( $char_rom )); |
188 |
dpavlin |
188 |
warn "loaded ", $#chars, " characters from $char_rom\n"; |
189 |
|
|
|
190 |
dpavlin |
174 |
my $last_dump = ''; |
191 |
|
|
|
192 |
dpavlin |
188 |
my $x_size = 48; |
193 |
|
|
my $y_size = 16; |
194 |
|
|
my $c_h = 8; |
195 |
|
|
|
196 |
|
|
sub screen_width { $x_size * 8 } |
197 |
|
|
sub screen_height { $y_size * $c_h } |
198 |
|
|
|
199 |
dpavlin |
174 |
sub render_vram { |
200 |
|
|
my $self = shift; |
201 |
|
|
|
202 |
|
|
my $addr = 0xb000; |
203 |
|
|
|
204 |
|
|
my $dump; |
205 |
|
|
|
206 |
dpavlin |
188 |
my @pixels = ("\x00") x ( $x_size * $y_size * 8 ); |
207 |
|
|
|
208 |
|
|
for my $y ( 0 .. $y_size - 1 ) { |
209 |
dpavlin |
174 |
$dump .= sprintf "%2d: %s\n",$y, join('', map { chr( $_ ) } @mem[ $addr+15 .. $addr+62 ] ); |
210 |
dpavlin |
188 |
|
211 |
|
|
foreach my $x ( 0 .. $x_size - 1 ) { |
212 |
|
|
my $c = $mem[ $addr + 15 + $x ]; |
213 |
|
|
my $l = $x_size * $c_h; |
214 |
|
|
foreach my $o ( 0 .. $c_h - 1 ) { |
215 |
|
|
$pixels[ ( $y * $l ) + $x + ( $o * $x_size ) ] = $chars[ ( $c * $c_h ) + $o ]; |
216 |
|
|
} |
217 |
|
|
} |
218 |
|
|
|
219 |
dpavlin |
174 |
$addr += 64; |
220 |
|
|
} |
221 |
|
|
|
222 |
|
|
if ( $dump ne $last_dump ) { |
223 |
dpavlin |
188 |
# print $dump; |
224 |
dpavlin |
174 |
$last_dump = $dump; |
225 |
dpavlin |
188 |
|
226 |
|
|
my $vram = SDL::Surface->new( |
227 |
|
|
-width => $x_size * 8, |
228 |
|
|
-height => $y_size * $c_h, |
229 |
|
|
-depth => 1, # 1 bit per pixel |
230 |
|
|
-pitch => $x_size, # bytes per line |
231 |
|
|
-from => pack("C*", @pixels), |
232 |
|
|
); |
233 |
|
|
$vram->set_colors( 0, $white, $black ); |
234 |
|
|
|
235 |
|
|
$self->render_frame( $vram ); |
236 |
dpavlin |
174 |
} |
237 |
|
|
} |
238 |
|
|
|
239 |
|
|
=head2 cpu_PC |
240 |
|
|
|
241 |
|
|
Helper metod to set or get PC for current architecture |
242 |
|
|
|
243 |
|
|
=cut |
244 |
|
|
|
245 |
|
|
sub cpu_PC { |
246 |
|
|
my ( $self, $addr ) = @_; |
247 |
|
|
if ( defined($addr) ) { |
248 |
|
|
$PC = $addr; |
249 |
|
|
warn sprintf("running from PC %04x\n", $PC); |
250 |
|
|
}; |
251 |
|
|
return $PC; |
252 |
|
|
} |
253 |
|
|
|
254 |
|
|
=head1 SEE ALSO |
255 |
|
|
|
256 |
|
|
L<VRac>, L<M6502>, L<Screen>, L<Tape> |
257 |
|
|
|
258 |
|
|
=head1 AUTHOR |
259 |
|
|
|
260 |
|
|
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
261 |
|
|
|
262 |
|
|
=head1 ACKNOWLEDGEMENTS |
263 |
|
|
|
264 |
|
|
See also L<http://www.foing.hr/~fng_josip/orao.htm> which is source of all |
265 |
|
|
info about this machine (and even hardware implementation from 2007). |
266 |
|
|
|
267 |
|
|
=head1 COPYRIGHT & LICENSE |
268 |
|
|
|
269 |
|
|
Copyright 2007 Dobrica Pavlinusic, All Rights Reserved. |
270 |
|
|
|
271 |
|
|
This program is free software; you can redistribute it and/or modify it |
272 |
|
|
under the same terms as Perl itself. |
273 |
|
|
|
274 |
|
|
=cut |
275 |
|
|
|
276 |
|
|
1; # End of Galeb |