Rockboy - gameboy emulation for rockbox, based on gnuboy. Still a bit early, but already playable on iRiver H1xx and the simulators. The archos recorder version is currently rather slow...

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6104 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 383 insertions, 0 deletions

diff --git a/apps/plugins/rockboy/loader.c b/apps/plugins/rockboy/loader.c
new file mode 100644
index 0000000..ad7c309
--- /dev/null
+++ b/apps/plugins/rockboy/loader.c
@@ -0,0 +1,383 @@
+
+#include <stdio.h>
+#include <string.h>
+
+
+#include "rockmacros.h"
+#include "defs.h"
+#include "regs.h"
+#include "mem.h"
+#include "hw.h"
+#include "rtc.h"
+#include "rc.h"
+#include "save.h"
+#include "sound.h"
+
+
+static int mbc_table[256] =
+{
+	0, 1, 1, 1, 0, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 3,
+	3, 3, 3, 3, 0, 0, 0, 0, 0, 5, 5, 5, MBC_RUMBLE, MBC_RUMBLE, MBC_RUMBLE, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, MBC_HUC3, MBC_HUC1
+};
+
+static int rtc_table[256] =
+{
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0
+};
+
+static int batt_table[256] =
+{
+	0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0,
+	1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0,
+	0
+};
+
+static int romsize_table[256] =
+{
+	2, 4, 8, 16, 32, 64, 128, 256, 512,
+	0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 128, 128, 128
+	/* 0, 0, 72, 80, 96  -- actual values but bad to use these! */
+};
+
+static int ramsize_table[256] =
+{
+	1, 1, 1, 4, 16,
+	4 /* FIXME - what value should this be?! */
+};
+
+
+static char *romfile;
+static char sramfile[500];
+static char rtcfile[500];
+static char saveprefix[500];
+
+static char *savename;
+static char *savedir = "/.rockbox/rockboy";
+
+static int saveslot;
+
+static int forcebatt, nobatt;
+static int forcedmg;
+
+static int memfill = -1, memrand = -1;
+
+//static byte romMemory[4*1025*1024];
+int mp3_buffer_size;
+void *bufferpos;
+
+static void initmem(void *mem, int size)
+{
+	char *p = mem;
+	if (memrand >= 0)
+	{
+		srand(memrand ? memrand : -6 ); //time(0));
+		while(size--) *(p++) = rand();
+	}
+	else if (memfill >= 0)
+		memset(p, memfill, size);
+}
+
+static byte *loadfile(int fd, int *len)
+{
+	int c, l = 0, p = 0;
+	
+	byte *d, buf[512];
+	d=malloc(32768);
+	for(;;)
+	{
+		c = read(fd, buf, sizeof buf);
+		if (c <= 0) break;
+		l += c;
+		memcpy(d+p, buf, c);
+		p += c;
+	}
+	setmallocpos(d+p+64);
+	*len = l;
+	return d;
+}
+
+//static byte sram[65536];
+
+int rom_load(void)
+{
+	int fd;
+	byte c, *data, *header;
+	int len = 0, rlen;
+
+	fd = open(romfile, O_RDONLY);
+	
+	if (fd<0) {
+	  die("cannot open rom file");
+	  die(romfile);
+	  return 1;
+	}
+
+	data = loadfile(fd, &len);
+	header = data; // no zip. = decompress(data, &len);
+	
+	memcpy(rom.name, header+0x0134, 16);
+	if (rom.name[14] & 0x80) rom.name[14] = 0;
+	if (rom.name[15] & 0x80) rom.name[15] = 0;
+	rom.name[16] = 0;
+
+	c = header[0x0147];
+	mbc.type = mbc_table[c];
+	mbc.batt = (batt_table[c] && !nobatt) || forcebatt;
+//	mbc.batt = 1; // always store savegame mem.
+	rtc.batt = rtc_table[c];
+	mbc.romsize = romsize_table[header[0x0148]];
+	mbc.ramsize = ramsize_table[header[0x0149]];
+
+	if (!mbc.romsize)  { 
+		die("unknown ROM size %02X\n", header[0x0148]);
+		return 1;
+	}
+	if (!mbc.ramsize) { 
+		die("unknown SRAM size %02X\n", header[0x0149]);
+		return 1;
+	}
+
+	rlen = 16384 * mbc.romsize;
+	rom.bank = (void *) data; //realloc(data, rlen);
+	if (rlen > len) memset(rom.bank[0]+len, 0xff, rlen - len);
+
+	ram.sbank = malloc(8192 * mbc.ramsize);
+	//ram.ibank = malloc(4096*8);
+
+	initmem(ram.sbank, 8192 * mbc.ramsize);
+	initmem(ram.ibank, 4096 * 8);
+
+	mbc.rombank = 1;
+	mbc.rambank = 0;
+
+	c = header[0x0143];
+        hw.cgb = ((c == 0x80) || (c == 0xc0)) && !forcedmg;
+	hw.gba = 0; //(hw.cgb && gbamode);
+		
+	close(fd);
+
+	return 0;
+}
+
+int sram_load(void)
+{
+	int fd;
+	char meow[500];
+
+	if (!mbc.batt || !sramfile || !*sramfile) return -1;
+
+	/* Consider sram loaded at this point, even if file doesn't exist */
+	ram.loaded = 1;
+
+	fd = open(sramfile, O_RDONLY);
+        snprintf(meow,499,"Opening %s %d",sramfile,fd);
+	rb->splash(HZ*2, true, meow);		
+	if (fd<0) return -1;
+        snprintf(meow,499,"Loading savedata from %s",sramfile);
+        rb->splash(HZ*2, true, meow);	
+	read(fd,ram.sbank, 8192*mbc.ramsize);
+	close(fd);
+	
+	return 0;
+}
+
+
+int sram_save(void)
+{
+	int fd;
+	char meow[500];
+
+	/* If we crash before we ever loaded sram, DO NOT SAVE! */
+	if (!mbc.batt || !sramfile || !ram.loaded || !mbc.ramsize)
+		return -1;
+	fd = open(sramfile, O_WRONLY|O_CREAT);
+//	snprintf(meow,499,"Opening %s %d",sramfile,fd);
+//	rb->splash(HZ*2, true, meow);
+	if (fd<0) return -1;
+	snprintf(meow,499,"Saving savedata to %s",sramfile);
+	rb->splash(HZ*2, true, meow);
+	write(fd,ram.sbank, 8192*mbc.ramsize);
+	close(fd);
+	
+	return 0;
+}
+
+
+void state_save(int n)
+{
+	int fd;
+	char name[500];
+
+	if (n < 0) n = saveslot;
+	if (n < 0) n = 0;
+	snprintf(name, 499,"%s.%03d", saveprefix, n);
+
+	if ((fd = open(name, O_WRONLY|O_CREAT)>=0))
+	{
+		savestate(fd);
+		close(fd);
+	}
+}
+
+
+void state_load(int n)
+{
+	int fd;
+	char name[500];
+
+	if (n < 0) n = saveslot;
+	if (n < 0) n = 0;
+	snprintf(name, 499, "%s.%03d", saveprefix, n);
+
+	if ((fd = open(name, O_RDONLY)>=0))
+	{
+		loadstate(fd);
+		close(fd);
+		vram_dirty();
+		pal_dirty();
+		sound_dirty();
+		mem_updatemap();
+	}
+}
+
+void rtc_save(void)
+{
+	int fd;
+	if (!rtc.batt) return;
+	if ((fd = open(rtcfile, O_WRONLY|O_CREAT))<0) return;
+	rtc_save_internal(fd);
+	close(fd);
+}
+
+void rtc_load(void)
+{
+	int fd;
+	if (!rtc.batt) return;
+	if ((fd = open(rtcfile, O_RDONLY))<0) return;
+	rtc_load_internal(fd);
+	close(fd);
+}
+
+
+void loader_unload(void)
+{
+	sram_save();
+//	if (romfile) free(romfile);
+//	if (sramfile) free(sramfile);
+//	if (saveprefix) free(saveprefix);
+//	if (rom.bank) free(rom.bank);
+//	if (ram.sbank) free(ram.sbank);
+	romfile =   0;
+	rom.bank = 0;
+	ram.sbank = 0;
+	mbc.type = mbc.romsize = mbc.ramsize = mbc.batt = 0;
+}
+
+/*
+static char *base(char *s)
+{
+	char *p;
+	p = strrchr(s, '/');
+	if (p) return p+1;
+	return s;
+}
+
+
+static char *ldup(char *s)
+{
+	int i;
+	char *n, *p;
+	p = n = malloc(strlen(s));
+	for (i = 0; s[i]; i++) if (isalnum(s[i])) *(p++) = tolower(s[i]);
+	*p = 0;
+	return n;
+}*/
+
+void cleanup(void)
+{
+	sram_save();
+	rtc_save();
+	// IDEA - if error, write emergency savestate..? 
+}
+
+void loader_init(char *s)
+{
+	char *name;
+	DIR* dir;
+
+//	sys_checkdir(savedir, 1); /* needs to be writable */
+	dir=opendir(savedir);
+	if(!dir)
+	  mkdir(savedir,0);
+	else
+	  closedir(dir);
+
+	romfile = s;
+	if(rom_load())
+		return;
+	vid_settitle(rom.name);
+	name = rom.name;
+	
+	snprintf(saveprefix, 499, "%s/%s", savedir, name);
+
+	strcpy(sramfile, saveprefix);
+	strcat(sramfile, ".sav");
+
+	strcpy(rtcfile, saveprefix);
+	strcat(rtcfile, ".rtc");
+	
+	sram_load();
+	rtc_load();
+
+	//atexit(cleanup);
+}
+
+rcvar_t loader_exports[] =
+{
+	RCV_STRING("savedir", &savedir),
+	RCV_STRING("savename", &savename),
+	RCV_INT("saveslot", &saveslot),
+	RCV_BOOL("forcebatt", &forcebatt),
+	RCV_BOOL("nobatt", &nobatt),
+	RCV_BOOL("forcedmg", &forcedmg),
+	RCV_INT("memfill", &memfill),
+	RCV_INT("memrand", &memrand),
+	RCV_END
+};
+
+
+
+
+
+
+
+
+