| 1 |
#include <EXTERN.h> |
| 2 |
#include <perl.h> |
| 3 |
#include "M6502.h" |
| 4 |
#include "config.h" |
| 5 |
|
| 6 |
#if DEBUGF |
| 7 |
#define debugf(x) do { \ |
| 8 |
PerlIO_stdoutf("#> "); \ |
| 9 |
PerlIO_stdoutf x ; \ |
| 10 |
} while (0) |
| 11 |
#else |
| 12 |
#define debugf(x) |
| 13 |
#endif |
| 14 |
|
| 15 |
static PerlInterpreter *my_perl; |
| 16 |
|
| 17 |
static M6502 *R; |
| 18 |
|
| 19 |
#if DUMP_R |
| 20 |
#define dump_R printf("# PC: %04x A:%02x P:%02x X:%02x Y:%02x S:%02x\n", R->PC.W, R->A, R->P, R->X, R->Y, R->S ); |
| 21 |
#else |
| 22 |
#define dump_R |
| 23 |
#endif |
| 24 |
|
| 25 |
void pull_R(M6502 *R) { |
| 26 |
R->A = SvIV( get_sv("M6502::A", FALSE) ); |
| 27 |
R->P = SvIV( get_sv("M6502::P", FALSE) ); |
| 28 |
R->X = SvIV( get_sv("M6502::X", FALSE) ); |
| 29 |
R->Y = SvIV( get_sv("M6502::Y", FALSE) ); |
| 30 |
R->S = SvIV( get_sv("M6502::S", FALSE) ); |
| 31 |
R->PC.W = SvIV( get_sv("M6502::PC", FALSE) ); |
| 32 |
R->IPeriod = SvIV( get_sv("M6502::IPeriod", FALSE) ); |
| 33 |
// ICount IRequest IAutoReset TrapBadOps Trap Trace |
| 34 |
printf("pull_R finished\n"); |
| 35 |
dump_R; |
| 36 |
} |
| 37 |
|
| 38 |
void push_R(M6502 *R) { |
| 39 |
dSP; |
| 40 |
ENTER; |
| 41 |
SAVETMPS; |
| 42 |
PUSHMARK(SP); |
| 43 |
XPUSHs( sv_2mortal( newSViv( R->A ) ) ); |
| 44 |
XPUSHs( sv_2mortal( newSViv( R->P ) ) ); |
| 45 |
XPUSHs( sv_2mortal( newSViv( R->X ) ) ); |
| 46 |
XPUSHs( sv_2mortal( newSViv( R->Y ) ) ); |
| 47 |
XPUSHs( sv_2mortal( newSViv( R->S ) ) ); |
| 48 |
XPUSHs( sv_2mortal( newSViv( R->PC.W ) ) ); |
| 49 |
PUTBACK; |
| 50 |
call_pv("M6502::push_R", G_DISCARD ); |
| 51 |
printf("push_R called\n"); |
| 52 |
dump_R; |
| 53 |
FREETMPS; |
| 54 |
LEAVE; |
| 55 |
} |
| 56 |
|
| 57 |
/** Rd6502()/Wr6502/Op6502() *********************************/ |
| 58 |
/** These functions are called when access to RAM occurs. **/ |
| 59 |
/** They allow to control memory access. Op6502 is the same **/ |
| 60 |
/** as Rd6502, but used to read *opcodes* only, when many **/ |
| 61 |
/** checks can be skipped to make it fast. It is only **/ |
| 62 |
/** required if there is a #define FAST_RDOP. **/ |
| 63 |
/************************************ TO BE WRITTEN BY USER **/ |
| 64 |
|
| 65 |
byte mem(word Addr) { |
| 66 |
byte byte; |
| 67 |
int count; |
| 68 |
dSP; |
| 69 |
ENTER; |
| 70 |
SAVETMPS; |
| 71 |
PUSHMARK(SP); |
| 72 |
XPUSHs( sv_2mortal( newSViv( Addr ) ) ); |
| 73 |
PUTBACK; |
| 74 |
count = call_pv("Arch::read", G_ARRAY ); |
| 75 |
if ( count != 1 ) { |
| 76 |
printf("expect 1 return value, got %d", count); |
| 77 |
exit(1); |
| 78 |
} |
| 79 |
//debugf(("got %d values\n", count)); |
| 80 |
SPAGAIN; |
| 81 |
SV *sv; |
| 82 |
sv = POPs; |
| 83 |
byte = SvIV(sv); |
| 84 |
FREETMPS; |
| 85 |
LEAVE; |
| 86 |
//debugf(("mem(%04x) = %02x\n", Addr, byte)); |
| 87 |
return byte; |
| 88 |
} |
| 89 |
|
| 90 |
byte Rd6502(register word Addr) { |
| 91 |
byte Value; |
| 92 |
Value = mem(Addr); |
| 93 |
debugf(("Rd6502(%04x) = %02x\n", Addr, Value)); |
| 94 |
return Value; |
| 95 |
} |
| 96 |
|
| 97 |
void Wr6502(register word Addr,register byte Value) { |
| 98 |
debugf(("Wr6502(%04x,%02x)\n", Addr, Value)); |
| 99 |
dSP; |
| 100 |
ENTER; |
| 101 |
SAVETMPS; |
| 102 |
PUSHMARK(SP); |
| 103 |
XPUSHs( sv_2mortal( newSViv( Addr ) ) ); |
| 104 |
XPUSHs( sv_2mortal( newSViv( Value ) ) ); |
| 105 |
PUTBACK; |
| 106 |
call_pv("Arch::write", G_DISCARD ); |
| 107 |
FREETMPS; |
| 108 |
LEAVE; |
| 109 |
} |
| 110 |
|
| 111 |
byte Op6502(register word Addr) { |
| 112 |
byte Op; |
| 113 |
Op = mem(Addr); |
| 114 |
debugf(("Op6502(%04x,%02x) PC:%04x\n", Addr, Op, R->PC.W)); |
| 115 |
return Op; |
| 116 |
} |
| 117 |
|
| 118 |
/** Loop6502() ***********************************************/ |
| 119 |
/** 6502 emulation calls this function periodically to **/ |
| 120 |
/** check if the system hardware requires any interrupts. **/ |
| 121 |
/** This function must return one of following values: **/ |
| 122 |
/** INT_NONE, INT_IRQ, INT_NMI, or INT_QUIT to exit the **/ |
| 123 |
/** emulation loop. **/ |
| 124 |
/************************************ TO BE WRITTEN BY USER **/ |
| 125 |
|
| 126 |
int hw_int = INT_NONE; |
| 127 |
|
| 128 |
byte Loop6502(register M6502 *R) { |
| 129 |
debugf(("Loop6502\n")); |
| 130 |
dump_R; |
| 131 |
return hw_int; |
| 132 |
} |
| 133 |
|
| 134 |
/** Patch6502() **********************************************/ |
| 135 |
/** Emulation calls this function when it encounters an **/ |
| 136 |
/** unknown opcode. This can be used to patch the code to **/ |
| 137 |
/** emulate BIOS calls, such as disk and tape access. The **/ |
| 138 |
/** function should return 1 if the exception was handled, **/ |
| 139 |
/** or 0 if the opcode was truly illegal. **/ |
| 140 |
/************************************ TO BE WRITTEN BY USER **/ |
| 141 |
byte Patch6502(register byte Op,register M6502 *R) { |
| 142 |
debugf(("Patch6502(%02x)\n", Op)); |
| 143 |
dump_R; |
| 144 |
hw_int = INT_QUIT; |
| 145 |
return 0; |
| 146 |
} |
| 147 |
|
| 148 |
/** |
| 149 |
* main code |
| 150 |
* |
| 151 |
**/ |
| 152 |
|
| 153 |
int main(int argc, char **argv) { |
| 154 |
char *command_line[] = {"", "-e", EMU_START }; |
| 155 |
my_perl = perl_alloc(); |
| 156 |
perl_construct(my_perl); |
| 157 |
if (perl_parse(my_perl, xs_init, 3, command_line, (char **)NULL)) { |
| 158 |
printf("Failed to parse initial: %s\n", EMU_START ); |
| 159 |
return 0; |
| 160 |
} |
| 161 |
perl_run(my_perl); |
| 162 |
if (SvTRUE(ERRSV)) { |
| 163 |
printf("Failed to execute\n"); |
| 164 |
return 0; |
| 165 |
} else { |
| 166 |
R = malloc(sizeof(M6502)); |
| 167 |
if (!R) { |
| 168 |
printf("can't alloc %d bytes for M6502", sizeof(M6502)); |
| 169 |
exit(1); |
| 170 |
} |
| 171 |
|
| 172 |
printf("reset CPU\n"); |
| 173 |
Reset6502(R); |
| 174 |
|
| 175 |
printf("call Arch::init\n"); |
| 176 |
dSP; |
| 177 |
PUSHMARK(SP); |
| 178 |
call_pv("Arch::init", G_DISCARD | G_NOARGS ); |
| 179 |
FREETMPS; |
| 180 |
LEAVE; |
| 181 |
|
| 182 |
int cycles = 1; |
| 183 |
while ( cycles ) { |
| 184 |
dSP; |
| 185 |
PUSHMARK(SP); |
| 186 |
call_pv("Arch::cli", G_DISCARD | G_NOARGS ); |
| 187 |
pull_R(R); |
| 188 |
FREETMPS; |
| 189 |
LEAVE; |
| 190 |
cycles = SvIV( get_sv("M6502::run_for", FALSE) ); |
| 191 |
if ( cycles > 0 ) { |
| 192 |
printf("run CPU for %d cycles\n", cycles); |
| 193 |
dump_R; |
| 194 |
//Run6502(R); |
| 195 |
Exec6502(R, cycles); |
| 196 |
dump_R; |
| 197 |
push_R(R); |
| 198 |
printf("end of %d cycles CPU run\n", cycles); |
| 199 |
} else { |
| 200 |
printf("no cpu cycles set for run\n"); |
| 201 |
cycles = 1; // never exit, prevents segfault |
| 202 |
} |
| 203 |
} |
| 204 |
} |
| 205 |
free(R); |
| 206 |
perl_destruct(my_perl); |
| 207 |
perl_free(my_perl); |
| 208 |
return 0; |
| 209 |
} |
Parent Directory
| 
Revision Log