11 |
int debug = 0; |
int debug = 0; |
12 |
|
|
13 |
// same as memory size |
// same as memory size |
14 |
#define CACHE_SIZE 0xffff |
#define CACHE_SIZE 0x10000 |
15 |
byte opCache[CACHE_SIZE]; |
byte opCache[CACHE_SIZE]; |
16 |
|
|
17 |
#define CALLBACK_READ_SKIP 0x00 |
#define CALLBACK_READ_SKIP 0x00 |
84 |
/************************************ TO BE WRITTEN BY USER **/ |
/************************************ TO BE WRITTEN BY USER **/ |
85 |
|
|
86 |
byte mem(register word Addr) { |
byte mem(register word Addr) { |
87 |
|
debugf(("mem(%04x) callback %02x", Addr, perlCallBack[Addr])); |
88 |
|
|
89 |
if ( perlCallBack[Addr] & CALLBACK_READ_MASK == CALLBACK_READ_SKIP ) |
debugf(("### SKIP? %02x == %02x", perlCallBack[Addr] & CALLBACK_READ_MASK, CALLBACK_READ_SKIP)); |
90 |
|
if ( ( perlCallBack[Addr] & CALLBACK_READ_MASK ) == CALLBACK_READ_SKIP ) { |
91 |
|
debugf(("MEM: read callback skipped")); |
92 |
return opCache[Addr]; |
return opCache[Addr]; |
93 |
if ( perlCallBack[Addr] & CALLBACK_READ_MASK == CALLBACK_READ_ONCE ) |
} |
94 |
|
if ( ( perlCallBack[Addr] & CALLBACK_READ_MASK ) == CALLBACK_READ_ONCE ) { |
95 |
|
debugf(("MEM: read callback disabled")); |
96 |
perlCallBack[Addr] = perlCallBack[Addr] & CALLBACK_WRITE_MASK | CALLBACK_READ_SKIP; |
perlCallBack[Addr] = perlCallBack[Addr] & CALLBACK_WRITE_MASK | CALLBACK_READ_SKIP; |
97 |
|
} |
98 |
|
|
99 |
byte byte; |
byte byte; |
100 |
int count; |
int count; |
|
debugf(("mem(%04x)", Addr)); |
|
101 |
dSP; |
dSP; |
102 |
ENTER; |
ENTER; |
103 |
SAVETMPS; |
SAVETMPS; |
134 |
|
|
135 |
void Wr6502(register word Addr,register byte Value) { |
void Wr6502(register word Addr,register byte Value) { |
136 |
debugf(("Wr6502(%04x,%02x)", Addr, Value)); |
debugf(("Wr6502(%04x,%02x)", Addr, Value)); |
137 |
if ( perlCallBack[Addr] & CALLBACK_WRITE_MASK == CALLBACK_WRITE_SKIP && opCache[Addr] == Value ) { |
opCache[Addr] = Value; |
138 |
debugf(("skipped perl callback, same value")); |
if ( ( perlCallBack[Addr] & CALLBACK_WRITE_MASK ) == CALLBACK_WRITE_SKIP ) { |
139 |
|
debugf(("MEM: write callback skipped")); |
140 |
return; |
return; |
141 |
} |
} |
142 |
opCache[Addr] = Value; |
if ( ( perlCallBack[Addr] & CALLBACK_WRITE_MASK ) == CALLBACK_WRITE_ONCE ) { |
|
if ( perlCallBack[Addr] & CALLBACK_WRITE_MASK == CALLBACK_WRITE_SKIP ) return; |
|
|
if ( perlCallBack[Addr] & CALLBACK_WRITE_MASK == CALLBACK_WRITE_ONCE ) |
|
143 |
perlCallBack[Addr] = perlCallBack[Addr] & CALLBACK_READ_MASK | CALLBACK_WRITE_SKIP; |
perlCallBack[Addr] = perlCallBack[Addr] & CALLBACK_READ_MASK | CALLBACK_WRITE_SKIP; |
144 |
|
debugf(("MEM: write callback skipped")); |
145 |
|
} |
146 |
dSP; |
dSP; |
147 |
ENTER; |
ENTER; |
148 |
SAVETMPS; |
SAVETMPS; |
205 |
exit(1); |
exit(1); |
206 |
} |
} |
207 |
memset( opCache, 0, CACHE_SIZE ); |
memset( opCache, 0, CACHE_SIZE ); |
|
memset( perlCallBack, CALLBACK_READ_ALWAYS | CALLBACK_WRITE_ALWAYS, CACHE_SIZE ); |
|
208 |
} |
} |
209 |
|
memset( perlCallBack, ( CALLBACK_READ_ALWAYS | CALLBACK_WRITE_ALWAYS ), CACHE_SIZE ); |
210 |
Reset6502(R); |
Reset6502(R); |
211 |
debugf(("Reset6502 over")); |
debugf(("Reset6502 over")); |
212 |
update_perl_R(); |
update_perl_R(); |
238 |
|
|
239 |
/* FIXME somehow check if Addr will fit in int on current platform */ |
/* FIXME somehow check if Addr will fit in int on current platform */ |
240 |
void set_read_callback(int Addr) { |
void set_read_callback(int Addr) { |
241 |
perlCallBack[Addr] == perlCallBack[Addr] & CALLBACK_WRITE_MASK | CALLBACK_READ_ALWAYS; |
perlCallBack[Addr] = perlCallBack[Addr] & CALLBACK_WRITE_MASK | CALLBACK_READ_ALWAYS; |
242 |
debugf(("MEM: %04x read callback\n", Addr)); |
debugf(("MEM: %04x read callback to %02x\n", Addr, perlCallBack[Addr])); |
243 |
} |
} |
244 |
|
|
245 |
void set_write_callback(int Addr) { |
void set_write_callback(int Addr) { |
246 |
perlCallBack[Addr] == perlCallBack[Addr] & CALLBACK_READ_MASK | CALLBACK_WRITE_ALWAYS; |
perlCallBack[Addr] = perlCallBack[Addr] & CALLBACK_READ_MASK | CALLBACK_WRITE_ALWAYS; |
247 |
debugf(("MEM: %04x write callback\n", Addr)); |
debugf(("MEM: %04x write callback to %02x\n", Addr, perlCallBack[Addr])); |
248 |
} |
} |
249 |
|
|
250 |
/* we fake here, since we will need to call perl at least once to get initial value... */ |
/* we fake here, since we will need to call perl at least once to get initial value... */ |
258 |
return perlCallBack[Addr]; |
return perlCallBack[Addr]; |
259 |
} |
} |
260 |
|
|
261 |
|
void mem_poke(int Addr, int byte) { |
262 |
|
opCache[Addr] = byte; |
263 |
|
} |
264 |
|
|
265 |
|
int mem_peek(int Addr) { |
266 |
|
return opCache[Addr]; |
267 |
|
} |
268 |
|
|
269 |
MODULE = M6502 PACKAGE = M6502 |
MODULE = M6502 PACKAGE = M6502 |
270 |
|
|
271 |
PROTOTYPES: DISABLE |
PROTOTYPES: DISABLE |
272 |
|
|
273 |
int |
int set_debug(int state) |
|
set_debug(int state) |
|
274 |
|
|
275 |
int |
int get_debug() |
|
get_debug() |
|
276 |
|
|
277 |
int |
int reset() |
|
reset() |
|
278 |
|
|
279 |
void |
void update_C_R() |
|
update_C_R() |
|
280 |
|
|
281 |
void |
void update_perl_R() |
|
update_perl_R() |
|
282 |
|
|
283 |
int |
int exec(int cycles) |
|
exec(int cycles) |
|
284 |
|
|
285 |
void |
void set_read_callback(int Addr) |
|
set_read_callback(int Addr) |
|
286 |
|
|
287 |
void |
void set_write_callback(int Addr) |
|
set_write_callback(int Addr) |
|
288 |
|
|
289 |
int |
int set_all_callbacks(int mode) |
|
set_all_callbacks(int mode) |
|
290 |
|
|
291 |
int get_callback(int Addr) |
int get_callback(int Addr) |
292 |
|
|
293 |
|
void mem_poke(int Addr, int byte) |
294 |
|
|
295 |
|
int mem_peek(int Addr) |