VRac/M6502/perl.c

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

#if DEBUGF
#define debugf(x)  do {         \
        PerlIO_stdoutf("#> ");  \
        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 pull_R(M6502 *R) {
        R->A = SvIV( get_sv("M6502::A", FALSE) );
        R->P = SvIV( get_sv("M6502::P", FALSE) );
        R->X = SvIV( get_sv("M6502::X", FALSE) );
        R->Y = SvIV( get_sv("M6502::Y", FALSE) );
        R->S = SvIV( get_sv("M6502::S", FALSE) );
        R->PC.W = SvIV( get_sv("M6502::PC", FALSE) );
        R->IPeriod = SvIV( get_sv("M6502::IPeriod", FALSE) );
        // ICount IRequest IAutoReset TrapBadOps Trap Trace
        printf("pull_R finished\n");
        dump_R;
}

void push_R(M6502 *R) {
        dSP;
        ENTER;
        SAVETMPS;
        PUSHMARK(SP);
        XPUSHs( sv_2mortal( newSViv( R->A ) ) );
        XPUSHs( sv_2mortal( newSViv( R->P ) ) );
        XPUSHs( sv_2mortal( newSViv( R->X ) ) );
        XPUSHs( sv_2mortal( newSViv( R->Y ) ) );
        XPUSHs( sv_2mortal( newSViv( R->S ) ) );
        XPUSHs( sv_2mortal( newSViv( R->PC.W ) ) );
        PUTBACK;
        call_pv("M6502::push_R", G_DISCARD );
        printf("push_R called\n");
        dump_R;
        FREETMPS;
        LEAVE;
}

/** 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));
        return Op;
}

/** 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 **/

int hw_int = INT_NONE;

byte Loop6502(register M6502 *R) {
        debugf(("Loop6502\n"));
        dump_R;
        return hw_int;
}

/** 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 );

                int cycles = 1;
                while ( cycles ) {
                        call_pv("Arch::cli", G_DISCARD | G_NOARGS );
                        pull_R(R);
                        cycles = SvIV( get_sv("M6502::run_for", FALSE) );
                        printf("run CPU for %d cycles\n", cycles);
                        dump_R;
                        //Run6502(R);
                        Exec6502(R, cycles);
                        dump_R;
                        push_R(R);
                        printf("end of %d cycles CPU run\n", cycles);
                }
        }
        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	dpavlin	42	PerlIO_stdoutf("#> "); \
9	dpavlin	33	PerlIO_stdoutf x ; \
10			} while (0)
11			#else
12			#define debugf(x)
13			#endif
14
15	dpavlin	24	static PerlInterpreter *my_perl;
16
17			static M6502 *R;
18
19	dpavlin	34	#if DUMP_R
20	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 );
21	dpavlin	33	#else
22			#define dump_R
23			#endif
24	dpavlin	25
25	dpavlin	38	void pull_R(M6502 *R) {
26	dpavlin	33	R->A = SvIV( get_sv("M6502::A", FALSE) );
27	dpavlin	34	R->P = SvIV( get_sv("M6502::P", FALSE) );
28	dpavlin	38	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	dpavlin	25	// ICount IRequest IAutoReset TrapBadOps Trap Trace
34	dpavlin	38	printf("pull_R finished\n");
35	dpavlin	25	dump_R;
36	dpavlin	24	}
37
38	dpavlin	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	dpavlin	39	call_pv("M6502::push_R", G_DISCARD );
51	dpavlin	38	printf("push_R called\n");
52			dump_R;
53			FREETMPS;
54			LEAVE;
55			}
56
57	dpavlin	25	/ 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	dpavlin	28	byte mem(word Addr) {
66			byte byte;
67	dpavlin	27	int count;
68			dSP;
69			ENTER;
70			SAVETMPS;
71			PUSHMARK(SP);
72	dpavlin	28	XPUSHs( sv_2mortal( newSViv( Addr ) ) );
73	dpavlin	27	PUTBACK;
74	dpavlin	33	count = call_pv("Arch::read", G_ARRAY );
75	dpavlin	27	if ( count != 1 ) {
76			printf("expect 1 return value, got %d", count);
77			exit(1);
78			}
79	dpavlin	33	//debugf(("got %d values\n", count));
80	dpavlin	27	SPAGAIN;
81			SV *sv;
82			sv = POPs;
83	dpavlin	28	byte = SvIV(sv);
84	dpavlin	27	FREETMPS;
85			LEAVE;
86	dpavlin	34	//debugf(("mem(%04x) = %02x\n", Addr, byte));
87	dpavlin	28	return byte;
88			}
89
90			byte Rd6502(register word Addr) {
91			byte Value;
92			Value = mem(Addr);
93	dpavlin	34	debugf(("Rd6502(%04x) = %02x\n", Addr, Value));
94	dpavlin	27	return Value;
95	dpavlin	25	}
96
97			void Wr6502(register word Addr,register byte Value) {
98	dpavlin	33	debugf(("Wr6502(%04x,%02x)\n", Addr, Value));
99	dpavlin	27	dSP;
100			ENTER;
101			SAVETMPS;
102			PUSHMARK(SP);
103			XPUSHs( sv_2mortal( newSViv( Addr ) ) );
104			XPUSHs( sv_2mortal( newSViv( Value ) ) );
105			PUTBACK;
106	dpavlin	33	call_pv("Arch::write", G_DISCARD );
107	dpavlin	27	FREETMPS;
108			LEAVE;
109	dpavlin	25	}
110
111			byte Op6502(register word Addr) {
112			byte Op;
113	dpavlin	28	Op = mem(Addr);
114	dpavlin	36	debugf(("Op6502(%04x,%02x) PC:%04x\n", Addr, Op, R->PC.W));
115	dpavlin	40	return Op;
116	dpavlin	25	}
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	dpavlin	42
126			int hw_int = INT_NONE;
127
128	dpavlin	25	byte Loop6502(register M6502 *R) {
129	dpavlin	33	debugf(("Loop6502\n"));
130	dpavlin	25	dump_R;
131	dpavlin	42	return hw_int;
132	dpavlin	25	}
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	dpavlin	33	debugf(("Patch6502(%02x)\n", Op));
143	dpavlin	25	dump_R;
144	dpavlin	28	return 0;
145	dpavlin	25	}
146
147			/**
148			* main code
149			*
150			**/
151
152	dpavlin	24	int main(int argc, char **argv) {
153	dpavlin	30	char *command_line[] = {"", "-e", EMU_START };
154	dpavlin	24	my_perl = perl_alloc();
155			perl_construct(my_perl);
156	dpavlin	29	if (perl_parse(my_perl, xs_init, 3, command_line, (char **)NULL)) {
157	dpavlin	31	printf("Failed to parse initial: %s\n", EMU_START );
158	dpavlin	24	return 0;
159			}
160			perl_run(my_perl);
161			if (SvTRUE(ERRSV)) {
162			printf("Failed to execute\n");
163			return 0;
164			} else {
165			R = malloc(sizeof(M6502));
166			if (!R) {
167			printf("can't alloc %d bytes for M6502", sizeof(M6502));
168			exit(1);
169			}
170	dpavlin	26
171	dpavlin	24	printf("reset CPU\n");
172			Reset6502(R);
173	dpavlin	26
174	dpavlin	33	printf("call Arch::init\n");
175	dpavlin	26	dSP;
176			PUSHMARK(SP);
177	dpavlin	33	call_pv("Arch::init", G_DISCARD \| G_NOARGS );
178	dpavlin	26
179	dpavlin	42	int cycles = 1;
180			while ( cycles ) {
181			call_pv("Arch::cli", G_DISCARD \| G_NOARGS );
182			pull_R(R);
183			cycles = SvIV( get_sv("M6502::run_for", FALSE) );
184			printf("run CPU for %d cycles\n", cycles);
185			dump_R;
186			//Run6502(R);
187			Exec6502(R, cycles);
188			dump_R;
189			push_R(R);
190			printf("end of %d cycles CPU run\n", cycles);
191			}
192	dpavlin	24	}
193			free(R);
194			perl_destruct(my_perl);
195			perl_free(my_perl);
196			return 0;
197			}