/[VRac]/M6502/perl.c
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 24 by dpavlin, Mon Jul 30 13:29:57 2007 UTC revision 40 by dpavlin, Tue Jul 31 08:41:06 2007 UTC
# Line 3  Line 3 
3  #include "M6502.h"  #include "M6502.h"
4  #include "config.h"  #include "config.h"
5    
6    #if DEBUGF
7    #define debugf(x)  do {         \
8            PerlIO_stdoutf x ;      \
9    } while (0)
10    #else
11    #define debugf(x)
12    #endif
13    
14  static PerlInterpreter *my_perl;  static PerlInterpreter *my_perl;
15    
16  static M6502 *R;  static M6502 *R;
17    
18  void Reset6502(M6502 *R) {  #if DUMP_R
19          R->PC.W = atoi( SvPV_nolen( get_sv("M6502::PC", TRUE) ) );  #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 );
20          printf("PC: %04x\n", R->PC.W);  #else
21    #define dump_R
22    #endif
23    
24    void pull_R(M6502 *R) {
25            R->A = SvIV( get_sv("M6502::A", FALSE) );
26            R->P = SvIV( get_sv("M6502::P", FALSE) );
27            R->X = SvIV( get_sv("M6502::X", FALSE) );
28            R->Y = SvIV( get_sv("M6502::Y", FALSE) );
29            R->S = SvIV( get_sv("M6502::S", FALSE) );
30            R->PC.W = SvIV( get_sv("M6502::PC", FALSE) );
31            R->IPeriod = SvIV( get_sv("M6502::IPeriod", FALSE) );
32            // ICount IRequest IAutoReset TrapBadOps Trap Trace
33            printf("pull_R finished\n");
34            dump_R;
35    }
36    
37    void push_R(M6502 *R) {
38            dSP;
39            ENTER;
40            SAVETMPS;
41            PUSHMARK(SP);
42            XPUSHs( sv_2mortal( newSViv( R->A ) ) );
43            XPUSHs( sv_2mortal( newSViv( R->P ) ) );
44            XPUSHs( sv_2mortal( newSViv( R->X ) ) );
45            XPUSHs( sv_2mortal( newSViv( R->Y ) ) );
46            XPUSHs( sv_2mortal( newSViv( R->S ) ) );
47            XPUSHs( sv_2mortal( newSViv( R->PC.W ) ) );
48            PUTBACK;
49            call_pv("M6502::push_R", G_DISCARD );
50            printf("push_R called\n");
51            dump_R;
52            FREETMPS;
53            LEAVE;
54  }  }
55    
56    /** Rd6502()/Wr6502/Op6502() *********************************/
57    /** These functions are called when access to RAM occurs.   **/
58    /** They allow to control memory access. Op6502 is the same **/
59    /** as Rd6502, but used to read *opcodes* only, when many   **/
60    /** checks can be skipped to make it fast. It is only       **/
61    /** required if there is a #define FAST_RDOP.               **/
62    /************************************ TO BE WRITTEN BY USER **/
63    
64    byte mem(word Addr) {
65            byte byte;
66            int count;
67            dSP;
68            ENTER;
69            SAVETMPS;
70            PUSHMARK(SP);
71            XPUSHs( sv_2mortal( newSViv( Addr ) ) );
72            PUTBACK;
73            count = call_pv("Arch::read", G_ARRAY );
74            if ( count != 1 ) {
75                    printf("expect 1 return value, got %d", count);
76                    exit(1);
77            }
78            //debugf(("got %d values\n", count));
79            SPAGAIN;
80            SV *sv;
81            sv = POPs;
82            byte = SvIV(sv);
83            FREETMPS;
84            LEAVE;
85            //debugf(("mem(%04x) = %02x\n", Addr, byte));
86            return byte;
87    }
88    
89    byte Rd6502(register word Addr) {
90            byte Value;
91            Value = mem(Addr);
92            debugf(("Rd6502(%04x) = %02x\n", Addr, Value));
93            return Value;
94    }
95    
96    void Wr6502(register word Addr,register byte Value) {
97            debugf(("Wr6502(%04x,%02x)\n", Addr, Value));
98            dSP;
99            ENTER;
100            SAVETMPS;
101            PUSHMARK(SP);
102            XPUSHs( sv_2mortal( newSViv( Addr ) ) );
103            XPUSHs( sv_2mortal( newSViv( Value ) ) );
104            PUTBACK;
105            call_pv("Arch::write", G_DISCARD );
106            FREETMPS;
107            LEAVE;
108    }
109    
110    byte Op6502(register word Addr) {
111            byte Op;
112            Op = mem(Addr);
113            debugf(("Op6502(%04x,%02x) PC:%04x\n", Addr, Op, R->PC.W));
114            return Op;
115    }
116    
117    /** Loop6502() ***********************************************/
118    /** 6502 emulation calls this function periodically to      **/
119    /** check if the system hardware requires any interrupts.   **/
120    /** This function must return one of following values:      **/
121    /** INT_NONE, INT_IRQ, INT_NMI, or INT_QUIT to exit the     **/
122    /** emulation loop.                                         **/
123    /************************************ TO BE WRITTEN BY USER **/
124    byte Loop6502(register M6502 *R) {
125            debugf(("Loop6502\n"));
126            dump_R;
127            return INT_NONE;
128    }
129    
130    /** Patch6502() **********************************************/
131    /** Emulation calls this function when it encounters an     **/
132    /** unknown opcode. This can be used to patch the code to   **/
133    /** emulate BIOS calls, such as disk and tape access. The   **/
134    /** function should return 1 if the exception was handled,  **/
135    /** or 0 if the opcode was truly illegal.                   **/
136    /************************************ TO BE WRITTEN BY USER **/
137    byte Patch6502(register byte Op,register M6502 *R) {
138            debugf(("Patch6502(%02x)\n", Op));
139            dump_R;
140            return 0;
141    }
142    
143    /**
144     * main code
145     *
146     **/
147    
148  int main(int argc, char **argv) {  int main(int argc, char **argv) {
149          char *command_line[] = {"", "-e",          char *command_line[] = {"", "-e", EMU_START };
                 "use M6502; print \"Loaded M6502 module\n\";"};  
150          my_perl = perl_alloc();          my_perl = perl_alloc();
151          perl_construct(my_perl);          perl_construct(my_perl);
152          if (perl_parse(my_perl, NULL, 3, command_line, (char **)NULL)) {          if (perl_parse(my_perl, xs_init, 3, command_line, (char **)NULL)) {
153                  printf("Failed to parse\n");                  printf("Failed to parse initial: %s\n", EMU_START );
154                  return 0;                  return 0;
155          }          }
156          perl_run(my_perl);          perl_run(my_perl);
# Line 31  int main(int argc, char **argv) { Line 163  int main(int argc, char **argv) {
163                          printf("can't alloc %d bytes for M6502", sizeof(M6502));                          printf("can't alloc %d bytes for M6502", sizeof(M6502));
164                          exit(1);                          exit(1);
165                  }                  }
166    
167                  printf("reset CPU\n");                  printf("reset CPU\n");
168                  Reset6502(R);                  Reset6502(R);
169    
170                    printf("call Arch::init\n");
171                    dSP;
172                    PUSHMARK(SP);
173                    call_pv("Arch::init", G_DISCARD | G_NOARGS );
174    
175                    pull_R(R);
176                    int cycles = SvIV( get_sv("M6502::run_for", FALSE) );
177                    printf("run CPU for %d cycles\n", cycles);
178                    dump_R;
179                    //Run6502(R);
180                    Exec6502(R, cycles);
181                    dump_R;
182                    push_R(R);
183                    printf("end of CPU run\n");
184          }          }
185          free(R);          free(R);
186          perl_destruct(my_perl);          perl_destruct(my_perl);
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