/[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 48 by dpavlin, Tue Jul 31 10:47:30 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("#> ");  \
9            PerlIO_stdoutf x ;      \
10    } while (0)
11    #else
12    #define debugf(x)
13    #endif
14    
15  static PerlInterpreter *my_perl;  static PerlInterpreter *my_perl;
16    
17  static M6502 *R;  static M6502 *R;
18    
19  void Reset6502(M6502 *R) {  #if DUMP_R
20          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 );
21          printf("PC: %04x\n", R->PC.W);  #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            return 0;
145    }
146    
147    /**
148     * main code
149     *
150     **/
151    
152  int main(int argc, char **argv) {  int main(int argc, char **argv) {
153          char *command_line[] = {"", "-e",          char *command_line[] = {"", "-e", EMU_START };
                 "use M6502; print \"Loaded M6502 module\n\";"};  
154          my_perl = perl_alloc();          my_perl = perl_alloc();
155          perl_construct(my_perl);          perl_construct(my_perl);
156          if (perl_parse(my_perl, NULL, 3, command_line, (char **)NULL)) {          if (perl_parse(my_perl, xs_init, 3, command_line, (char **)NULL)) {
157                  printf("Failed to parse\n");                  printf("Failed to parse initial: %s\n", EMU_START );
158                  return 0;                  return 0;
159          }          }
160          perl_run(my_perl);          perl_run(my_perl);
# Line 31  int main(int argc, char **argv) { Line 167  int main(int argc, char **argv) {
167                          printf("can't alloc %d bytes for M6502", sizeof(M6502));                          printf("can't alloc %d bytes for M6502", sizeof(M6502));
168                          exit(1);                          exit(1);
169                  }                  }
170    
171                  printf("reset CPU\n");                  printf("reset CPU\n");
172                  Reset6502(R);                  Reset6502(R);
173    
174                    printf("call Arch::init\n");
175                    dSP;
176                    PUSHMARK(SP);
177                    call_pv("Arch::init", G_DISCARD | G_NOARGS );
178                    FREETMPS;
179                    LEAVE;
180    
181                    int cycles = 1;
182                    while ( cycles ) {
183                            dSP;
184                            PUSHMARK(SP);
185                            call_pv("Arch::cli", G_DISCARD | G_NOARGS );
186                            pull_R(R);
187                            FREETMPS;
188                            LEAVE;
189                            cycles = SvIV( get_sv("M6502::run_for", FALSE) );
190                            printf("run CPU for %d cycles\n", cycles);
191                            dump_R;
192                            //Run6502(R);
193                            Exec6502(R, cycles);
194                            dump_R;
195                            push_R(R);
196                            printf("end of %d cycles CPU run\n", cycles);
197                    }
198          }          }
199          free(R);          free(R);
200          perl_destruct(my_perl);          perl_destruct(my_perl);
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