VRac/M6502/perl.c

#include <EXTERN.h>
#include <perl.h>
#include "M6502.h"
#include "config.h"

#if DEBUGF
#define debugf(x)  do {         \
        PerlIO_stdoutf x ;      \
} while (0)
#else
#define debugf(x)
#endif

static PerlInterpreter *my_perl;

static M6502 *R;

#if DUMP_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 );
#else
#define dump_R
#endif

void update_R(M6502 *R) {
        R->A = SvIV( get_sv("M6502::A", FALSE) );
        printf("--%d", get_sv("M6502::A", FALSE) );
        R->P = SvIV( get_sv("M6502::P", FALSE) );
        R->X = atoi( SvPV_nolen( get_sv("M6502::X", FALSE) ) );
        R->Y = atoi( SvPV_nolen( get_sv("M6502::Y", FALSE) ) );
        R->S = atoi( SvPV_nolen( get_sv("M6502::S", FALSE) ) );
        R->PC.W = atoi( SvPV_nolen( get_sv("M6502::PC", FALSE) ) );
        R->IPeriod = atoi( SvPV_nolen( get_sv("M6502::IPeriod", FALSE) ) );
        // ICount IRequest IAutoReset TrapBadOps Trap Trace
        printf("update_r finished\n");
        dump_R;
}

/** Rd6502()/Wr6502/Op6502() *********************************/
/** These functions are called when access to RAM occurs.   **/
/** They allow to control memory access. Op6502 is the same **/
/** as Rd6502, but used to read *opcodes* only, when many   **/
/** checks can be skipped to make it fast. It is only       **/
/** required if there is a #define FAST_RDOP.               **/
/************************************ TO BE WRITTEN BY USER **/

byte mem(word Addr) {
        byte byte;
        int count;
        dSP;
        ENTER;
        SAVETMPS;
        PUSHMARK(SP);
        XPUSHs( sv_2mortal( newSViv( Addr ) ) );
        PUTBACK;
        count = call_pv("Arch::read", G_ARRAY );
        if ( count != 1 ) {
                printf("expect 1 return value, got %d", count);
                exit(1);
        }
        //debugf(("got %d values\n", count));
        SPAGAIN;
        SV *sv;
        sv = POPs;
        byte = SvIV(sv);
        FREETMPS;
        LEAVE;
        //debugf(("mem(%04x) = %02x\n", Addr, byte));
        return byte;
}

byte Rd6502(register word Addr) {
        byte Value;
        Value = mem(Addr);
        debugf(("Rd6502(%04x) = %02x\n", Addr, Value));
        return Value;
}

void Wr6502(register word Addr,register byte Value) {
        debugf(("Wr6502(%04x,%02x)\n", Addr, Value));
        dSP;
        ENTER;
        SAVETMPS;
        PUSHMARK(SP);
        XPUSHs( sv_2mortal( newSViv( Addr ) ) );
        XPUSHs( sv_2mortal( newSViv( Value ) ) );
        PUTBACK;
        call_pv("Arch::write", G_DISCARD );
        FREETMPS;
        LEAVE;
}

byte Op6502(register word Addr) {
        byte Op;
        Op = mem(Addr);
        debugf(("Op6502(%04x,%02x) PC:%04x\n", Addr, Op, R->PC.W));
}

/** Loop6502() ***********************************************/
/** 6502 emulation calls this function periodically to      **/
/** check if the system hardware requires any interrupts.   **/
/** This function must return one of following values:      **/
/** INT_NONE, INT_IRQ, INT_NMI, or INT_QUIT to exit the     **/
/** emulation loop.                                         **/
/************************************ TO BE WRITTEN BY USER **/
byte Loop6502(register M6502 *R) {
        debugf(("Loop6502\n"));
        dump_R;
        return INT_NONE;
}

/** Patch6502() **********************************************/
/** Emulation calls this function when it encounters an     **/
/** unknown opcode. This can be used to patch the code to   **/
/** emulate BIOS calls, such as disk and tape access. The   **/
/** function should return 1 if the exception was handled,  **/
/** or 0 if the opcode was truly illegal.                   **/
/************************************ TO BE WRITTEN BY USER **/
byte Patch6502(register byte Op,register M6502 *R) {
        debugf(("Patch6502(%02x)\n", Op));
        dump_R;
        return 0;
}

/**
 * main code
 *
 **/

int main(int argc, char **argv) {
        char *command_line[] = {"", "-e", EMU_START };
        my_perl = perl_alloc();
        perl_construct(my_perl);
        if (perl_parse(my_perl, xs_init, 3, command_line, (char **)NULL)) {
                printf("Failed to parse initial: %s\n", EMU_START );
                return 0;
        }
        perl_run(my_perl);
        if (SvTRUE(ERRSV)) {
                printf("Failed to execute\n");
                return 0;
        } else {
                R = malloc(sizeof(M6502));
                if (!R) {
                        printf("can't alloc %d bytes for M6502", sizeof(M6502));
                        exit(1);
                }

                printf("reset CPU\n");
                Reset6502(R);

                printf("call Arch::init\n");
                dSP;
                PUSHMARK(SP);
                call_pv("Arch::init", G_DISCARD | G_NOARGS );

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