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