shithub: sms

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Start plugging the vdp

--- a/Makefile

+++ b/Makefile

@@ -1,7 +1,7 @@

 TARGET := sms_libretro.so

 SHARED := -shared

-CFLAGS += -O3 -fPIC

+CFLAGS += -g -O3 -fPIC

 OBJ = sms.o z80.o mem.o vdp.o

--- a/fns.h

+++ b/fns.h

@@ -7,5 +7,7 @@

 void z80write(uint16_t, uint8_t);

 uint8_t z80in(uint8_t);

 void z80out(uint8_t, uint8_t);

+void vdpstep(void);

 void flush(void);

+void vdpmode(void);

 void ymwrite(uint8_t, uint8_t, uint8_t);

--- a/sms.c

+++ b/sms.c

@@ -12,6 +12,7 @@

 static retro_environment_t environ_cb;

 retro_audio_sample_batch_t audio_cb;

+int t = 0;

 uint32_t r[16];

 extern uint16_t pc, curpc, sp;

 uint32_t asp, irq, stop;

@@ -20,8 +21,10 @@

 // uint8_t *prg = NULL;

 uint8_t *rom = NULL;

 uint8_t *mem = NULL;

-uint32_t pic[256*224] = {0};

+uint8_t *pic = NULL;

+int vdpclock = 0;

+

 void

 loadrom(const uint8_t *data)

 {

@@ -28,6 +31,7 @@

 	// memcpy(header, data, sizeof(header));

 	// prg = malloc(0xC000);

 	// memcpy(prg, data+sizeof(header), 0xC000);

+	pic = malloc(320 * 224 * 4);

 	rom = malloc(0x40000);

 	memcpy(rom, data, 0x40000);

 	mem = malloc(0xC000+0x8000);

@@ -78,6 +82,7 @@

 		return false;

 	loadrom(game->data);

+	vdpmode();

 	return true;

 }

@@ -94,11 +99,18 @@

 	input_poll_cb();

 	process_inputs();

-	// while(!doflush){

+	while(!doflush){

 		printf("%d ================================\n", counter++);

-		z80step();

-	// }

-	video_cb(pic, 256, 224, 256*4);

+		t = z80step() * Z80DIV;

+		vdpclock -= t;

+

+		while(vdpclock < 0){

+			vdpstep();

+			vdpclock += 8;

+		}

+	}

+	printf("flush\n");

+	video_cb(pic, 320, 224, 320*4);

 	// audioout();

 	doflush = 0;

 }

--- a/vdp.c

+++ b/vdp.c

@@ -1,3 +1,4 @@

+#include <stdio.h>

 #include "dat.h"

 #include "fns.h"

@@ -4,7 +5,7 @@

 extern uint8_t *pic;

 uint16_t vdpstat = 0x3400;

-int vdpx, vdpy, vdpyy, frame, intla;

+int vdpx = 0, vdpy, vdpyy, frame, intla;

 uint16_t hctr;

 static int xmax, xdisp;

 static int sx, snx, col, pri, lum;

@@ -96,6 +97,7 @@

 static void

 planeinit(void)

 {

+	printf("planeinit\n");

 	static int szs[] = {5, 6, 6, 7};

 	int v, a, i;

 	struct pctxt *p;

@@ -221,6 +223,7 @@

 static void

 spritesinit(void)

 {

+	printf("spritesinit\n");

 	uint16_t t, *p, dy, c;

 	uint32_t v;

 	int i, ns, np, nt;

-- 

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