[pcsx_rearmed.git] / libpcsxcore / sio.c

/***************************************************************************
 *   Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team              *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA.           *
 ***************************************************************************/

/*
* SIO functions.
*/

#include "sio.h"
#include <sys/stat.h>

#ifdef USE_LIBRETRO_VFS
#include <streams/file_stream_transforms.h>
#endif

// Status Flags
#define TX_RDY		0x0001
#define RX_RDY		0x0002
#define TX_EMPTY	0x0004
#define PARITY_ERR	0x0008
#define RX_OVERRUN	0x0010
#define FRAMING_ERR	0x0020
#define SYNC_DETECT	0x0040
#define DSR			0x0080
#define CTS			0x0100
#define IRQ			0x0200

// Control Flags
#define TX_PERM		0x0001
#define DTR			0x0002
#define RX_PERM		0x0004
#define BREAK		0x0008
#define RESET_ERR	0x0010
#define RTS			0x0020
#define SIO_RESET	0x0040

// *** FOR WORKS ON PADS AND MEMORY CARDS *****

static unsigned char buf[256];
static unsigned char cardh1[4] = { 0xff, 0x08, 0x5a, 0x5d };
static unsigned char cardh2[4] = { 0xff, 0x08, 0x5a, 0x5d };

// Transfer Ready and the Buffer is Empty
// static unsigned short StatReg = 0x002b;
static unsigned short StatReg = TX_RDY | TX_EMPTY;
static unsigned short ModeReg;
static unsigned short CtrlReg;
static unsigned short BaudReg;

static unsigned int bufcount;
static unsigned int parp;
static unsigned int mcdst, rdwr;
static unsigned char adrH, adrL;
static unsigned int padst;

char Mcd1Data[MCD_SIZE], Mcd2Data[MCD_SIZE];
char McdDisable[2];

#define SIO_INT(eCycle) { \
	if (!Config.Sio) { \
		psxRegs.interrupt |= (1 << PSXINT_SIO); \
		psxRegs.intCycle[PSXINT_SIO].cycle = eCycle; \
		psxRegs.intCycle[PSXINT_SIO].sCycle = psxRegs.cycle; \
		new_dyna_set_event(PSXINT_SIO, eCycle); \
	} \
}

// clk cycle byte
// 4us * 8bits = (PSXCLK / 1000000) * 32; (linuzappz)
// TODO: add SioModePrescaler and BaudReg
#define SIO_CYCLES		535

void sioWrite8(unsigned char value) {
#ifdef PAD_LOG
	PAD_LOG("sio write8 %x\n", value);
#endif
	switch (padst) {
		case 1: SIO_INT(SIO_CYCLES);
			if ((value & 0x40) == 0x40) {
				padst = 2; parp = 1;
				if (!Config.UseNet) {
					switch (CtrlReg & 0x2002) {
						case 0x0002:
							buf[parp] = PAD1_poll(value);
							break;
						case 0x2002:
							buf[parp] = PAD2_poll(value);
							break;
					}
				}/* else {
//					SysPrintf("%x: %x, %x, %x, %x\n", CtrlReg&0x2002, buf[2], buf[3], buf[4], buf[5]);
				}*/

				if (!(buf[parp] & 0x0f)) {
					bufcount = 2 + 32;
				} else {
					bufcount = 2 + (buf[parp] & 0x0f) * 2;
				}
				if (buf[parp] == 0x41) {
					switch (value) {
						case 0x43:
							buf[1] = 0x43;
							break;
						case 0x45:
							buf[1] = 0xf3;
							break;
					}
				}
				// NegCon - Wipeout 3
				if( buf[parp] == 0x23 ) {
					switch (value) {
						// enter config mode
						case 0x43:
							buf[1] = 0x79;
							break;

						// get status
						case 0x45:
							buf[1] = 0xf3;
							break;
					}
				}
			}
			else padst = 0;
			return;
		case 2:
			parp++;
/*			if (buf[1] == 0x45) {
				buf[parp] = 0;
				SIO_INT(SIO_CYCLES);
				return;
			}*/
			if (!Config.UseNet) {
				switch (CtrlReg & 0x2002) {
					case 0x0002: buf[parp] = PAD1_poll(value); break;
					case 0x2002: buf[parp] = PAD2_poll(value); break;
				}
			}

			if (parp == bufcount) { padst = 0; return; }
			SIO_INT(SIO_CYCLES);
			return;
	}

	switch (mcdst) {
		case 1:
			SIO_INT(SIO_CYCLES);
			if (rdwr) { parp++; return; }
			parp = 1;
			switch (value) {
				case 0x52: rdwr = 1; break;
				case 0x57: rdwr = 2; break;
				default: mcdst = 0;
			}
			return;
		case 2: // address H
			SIO_INT(SIO_CYCLES);
			adrH = value;
			*buf = 0;
			parp = 0;
			bufcount = 1;
			mcdst = 3;
			return;
		case 3: // address L
			SIO_INT(SIO_CYCLES);
			adrL = value;
			*buf = adrH;
			parp = 0;
			bufcount = 1;
			mcdst = 4;
			return;
		case 4:
			SIO_INT(SIO_CYCLES);
			parp = 0;
			switch (rdwr) {
				case 1: // read
					buf[0] = 0x5c;
					buf[1] = 0x5d;
					buf[2] = adrH;
					buf[3] = adrL;
					switch (CtrlReg & 0x2002) {
						case 0x0002:
							memcpy(&buf[4], Mcd1Data + (adrL | (adrH << 8)) * 128, 128);
							break;
						case 0x2002:
							memcpy(&buf[4], Mcd2Data + (adrL | (adrH << 8)) * 128, 128);
							break;
					}
					{
					char xor = 0;
					int i;
					for (i = 2; i < 128 + 4; i++)
						xor ^= buf[i];
					buf[132] = xor;
					}
					buf[133] = 0x47;
					bufcount = 133;
					break;
				case 2: // write
					buf[0] = adrL;
					buf[1] = value;
					buf[129] = 0x5c;
					buf[130] = 0x5d;
					buf[131] = 0x47;
					bufcount = 131;
					break;
			}
			mcdst = 5;
			return;
		case 5:
			parp++;
			if ((rdwr == 1 && parp == 132) ||
			    (rdwr == 2 && parp == 129)) {
				// clear "new card" flags
				if (CtrlReg & 0x2000)
					cardh2[1] &= ~8;
				else
					cardh1[1] &= ~8;
			}
			if (rdwr == 2) {
				if (parp < 128) buf[parp + 1] = value;
			}
			SIO_INT(SIO_CYCLES);
			return;
	}

	switch (value) {
		case 0x01: // start pad
			StatReg |= RX_RDY;		// Transfer is Ready

			if (!Config.UseNet) {
				switch (CtrlReg & 0x2002) {
					case 0x0002: buf[0] = PAD1_startPoll(1); break;
					case 0x2002: buf[0] = PAD2_startPoll(2); break;
				}
			} else {
				if ((CtrlReg & 0x2002) == 0x0002) {
					int i, j;

					PAD1_startPoll(1);
					buf[0] = 0;
					buf[1] = PAD1_poll(0x42);
					if (!(buf[1] & 0x0f)) {
						bufcount = 32;
					} else {
						bufcount = (buf[1] & 0x0f) * 2;
					}
					buf[2] = PAD1_poll(0);
					i = 3;
					j = bufcount;
					while (j--) {
						buf[i++] = PAD1_poll(0);
					}
					bufcount+= 3;

					if (NET_sendPadData(buf, bufcount) == -1)
						netError();

					if (NET_recvPadData(buf, 1) == -1)
						netError();
					if (NET_recvPadData(buf + 128, 2) == -1)
						netError();
				} else {
					memcpy(buf, buf + 128, 32);
				}
			}

			bufcount = 2;
			parp = 0;
			padst = 1;
			SIO_INT(SIO_CYCLES);
			return;
		case 0x81: // start memcard
			if (CtrlReg & 0x2000)
			{
				if (McdDisable[1])
					goto no_device;
				memcpy(buf, cardh2, 4);
			}
			else
			{
				if (McdDisable[0])
					goto no_device;
				memcpy(buf, cardh1, 4);
			}
			StatReg |= RX_RDY;
			parp = 0;
			bufcount = 3;
			mcdst = 1;
			rdwr = 0;
			SIO_INT(SIO_CYCLES);
			return;
		default:
		no_device:
			StatReg |= RX_RDY;
			buf[0] = 0xff;
			parp = 0;
			bufcount = 0;
			return;
	}
}

void sioWriteStat16(unsigned short value) {
}

void sioWriteMode16(unsigned short value) {
	ModeReg = value;
}

void sioWriteCtrl16(unsigned short value) {
	CtrlReg = value & ~RESET_ERR;
	if (value & RESET_ERR) StatReg &= ~IRQ;
	if ((CtrlReg & SIO_RESET) || !(CtrlReg & DTR)) {
		padst = 0; mcdst = 0; parp = 0;
		StatReg = TX_RDY | TX_EMPTY;
		psxRegs.interrupt &= ~(1 << PSXINT_SIO);
	}
}

void sioWriteBaud16(unsigned short value) {
	BaudReg = value;
}

unsigned char sioRead8() {
	unsigned char ret = 0;

	if ((StatReg & RX_RDY)/* && (CtrlReg & RX_PERM)*/) {
//		StatReg &= ~RX_OVERRUN;
		ret = buf[parp];
		if (parp == bufcount) {
			StatReg &= ~RX_RDY;		// Receive is not Ready now
			if (mcdst == 5) {
				mcdst = 0;
				if (rdwr == 2) {
					switch (CtrlReg & 0x2002) {
						case 0x0002:
							memcpy(Mcd1Data + (adrL | (adrH << 8)) * 128, &buf[1], 128);
							SaveMcd(Config.Mcd1, Mcd1Data, (adrL | (adrH << 8)) * 128, 128);
							break;
						case 0x2002:
							memcpy(Mcd2Data + (adrL | (adrH << 8)) * 128, &buf[1], 128);
							SaveMcd(Config.Mcd2, Mcd2Data, (adrL | (adrH << 8)) * 128, 128);
							break;
					}
				}
			}
			if (padst == 2) padst = 0;
			if (mcdst == 1) {
				mcdst = 2;
				StatReg|= RX_RDY;
			}
		}
	}

#ifdef PAD_LOG
	PAD_LOG("sio read8 ;ret = %x\n", ret);
#endif
	return ret;
}

unsigned short sioReadStat16() {
	return StatReg;
}

unsigned short sioReadMode16() {
	return ModeReg;
}

unsigned short sioReadCtrl16() {
	return CtrlReg;
}

unsigned short sioReadBaud16() {
	return BaudReg;
}

void netError() {
	ClosePlugins();
	SysMessage(_("Connection closed!\n"));

	CdromId[0] = '\0';
	CdromLabel[0] = '\0';

	SysRunGui();
}

void sioInterrupt() {
#ifdef PAD_LOG
	PAD_LOG("Sio Interrupt (CP0.Status = %x)\n", psxRegs.CP0.n.Status);
#endif
//	SysPrintf("Sio Interrupt\n");
	if (!(StatReg & IRQ)) {
		StatReg |= IRQ;
		psxHu32ref(0x1070) |= SWAPu32(0x80);
	}
}

void LoadMcd(int mcd, char *str) {
	FILE *f;
	char *data = NULL;

	if (mcd != 1 && mcd != 2)
		return;

	if (mcd == 1) {
		data = Mcd1Data;
		cardh1[1] |= 8; // mark as new
	}
	if (mcd == 2) {
		data = Mcd2Data;
		cardh2[1] |= 8;
	}

	McdDisable[mcd - 1] = 0;
#ifdef HAVE_LIBRETRO
	// memcard1 is handled by libretro
	if (mcd == 1)
		return;
#endif

	if (str == NULL || strcmp(str, "none") == 0) {
		McdDisable[mcd - 1] = 1;
		return;
	}
	if (*str == 0)
		return;

	f = fopen(str, "rb");
	if (f == NULL) {
		SysPrintf(_("The memory card %s doesn't exist - creating it\n"), str);
		CreateMcd(str);
		f = fopen(str, "rb");
		if (f != NULL) {
			struct stat buf;

			if (stat(str, &buf) != -1) {
				if (buf.st_size == MCD_SIZE + 64)
					fseek(f, 64, SEEK_SET);
				else if(buf.st_size == MCD_SIZE + 3904)
					fseek(f, 3904, SEEK_SET);
			}
			fread(data, 1, MCD_SIZE, f);
			fclose(f);
		}
		else
			SysMessage(_("Memory card %s failed to load!\n"), str);
	}
	else {
		struct stat buf;
		SysPrintf(_("Loading memory card %s\n"), str);
		if (stat(str, &buf) != -1) {
			if (buf.st_size == MCD_SIZE + 64)
				fseek(f, 64, SEEK_SET);
			else if(buf.st_size == MCD_SIZE + 3904)
				fseek(f, 3904, SEEK_SET);
		}
		fread(data, 1, MCD_SIZE, f);
		fclose(f);
	}
}

void LoadMcds(char *mcd1, char *mcd2) {
	LoadMcd(1, mcd1);
	LoadMcd(2, mcd2);
}

void SaveMcd(char *mcd, char *data, uint32_t adr, int size) {
	FILE *f;

	if (mcd == NULL || *mcd == 0 || strcmp(mcd, "none") == 0)
		return;

	f = fopen(mcd, "r+b");
	if (f != NULL) {
		struct stat buf;

		if (stat(mcd, &buf) != -1) {
			if (buf.st_size == MCD_SIZE + 64)
				fseek(f, adr + 64, SEEK_SET);
			else if (buf.st_size == MCD_SIZE + 3904)
				fseek(f, adr + 3904, SEEK_SET);
			else
				fseek(f, adr, SEEK_SET);
		} else
			fseek(f, adr, SEEK_SET);

		fwrite(data + adr, 1, size, f);
		fclose(f);
		return;
	}

#if 0
	// try to create it again if we can't open it
	f = fopen(mcd, "wb");
	if (f != NULL) {
		fwrite(data, 1, MCD_SIZE, f);
		fclose(f);
	}
#endif

	ConvertMcd(mcd, data);
}

void CreateMcd(char *mcd) {
	FILE *f;
	struct stat buf;
	int s = MCD_SIZE;
	int i = 0, j;

	f = fopen(mcd, "wb");
	if (f == NULL)
		return;

	if (stat(mcd, &buf) != -1) {
		if ((buf.st_size == MCD_SIZE + 3904) || strstr(mcd, ".gme")) {
			s = s + 3904;
			fputc('1', f);
			s--;
			fputc('2', f);
			s--;
			fputc('3', f);
			s--;
			fputc('-', f);
			s--;
			fputc('4', f);
			s--;
			fputc('5', f);
			s--;
			fputc('6', f);
			s--;
			fputc('-', f);
			s--;
			fputc('S', f);
			s--;
			fputc('T', f);
			s--;
			fputc('D', f);
			s--;
			for (i = 0; i < 7; i++) {
				fputc(0, f);
				s--;
			}
			fputc(1, f);
			s--;
			fputc(0, f);
			s--;
			fputc(1, f);
			s--;
			fputc('M', f);
			s--;
			fputc('Q', f);
			s--;
			for (i = 0; i < 14; i++) {
				fputc(0xa0, f);
				s--;
			}
			fputc(0, f);
			s--;
			fputc(0xff, f);
			while (s-- > (MCD_SIZE + 1))
				fputc(0, f);
		} else if ((buf.st_size == MCD_SIZE + 64) || strstr(mcd, ".mem") || strstr(mcd, ".vgs")) {
			s = s + 64;
			fputc('V', f);
			s--;
			fputc('g', f);
			s--;
			fputc('s', f);
			s--;
			fputc('M', f);
			s--;
			for (i = 0; i < 3; i++) {
				fputc(1, f);
				s--;
				fputc(0, f);
				s--;
				fputc(0, f);
				s--;
				fputc(0, f);
				s--;
			}
			fputc(0, f);
			s--;
			fputc(2, f);
			while (s-- > (MCD_SIZE + 1))
				fputc(0, f);
		}
	}
	fputc('M', f);
	s--;
	fputc('C', f);
	s--;
	while (s-- > (MCD_SIZE - 127))
		fputc(0, f);
	fputc(0xe, f);
	s--;

	for (i = 0; i < 15; i++) { // 15 blocks
		fputc(0xa0, f);
		s--;
		fputc(0x00, f);
		s--;
		fputc(0x00, f);
		s--;
		fputc(0x00, f);
		s--;
		fputc(0x00, f);
		s--;
		fputc(0x00, f);
		s--;
		fputc(0x00, f);
		s--;
		fputc(0x00, f);
		s--;
		fputc(0xff, f);
		s--;
		fputc(0xff, f);
		s--;
		for (j = 0; j < 117; j++) {
			fputc(0x00, f);
			s--;
		}
		fputc(0xa0, f);
		s--;
	}

	for (i = 0; i < 20; i++) {
		fputc(0xff, f);
		s--;
		fputc(0xff, f);
		s--;
		fputc(0xff, f);
		s--;
		fputc(0xff, f);
		s--;
		fputc(0x00, f);
		s--;
		fputc(0x00, f);
		s--;
		fputc(0x00, f);
		s--;
		fputc(0x00, f);
		s--;
		fputc(0xff, f);
		s--;
		fputc(0xff, f);
		s--;
		for (j = 0; j < 118; j++) {
			fputc(0x00, f);
			s--;
		}
	}

	while ((s--) >= 0)
		fputc(0, f);

	fclose(f);
}

void ConvertMcd(char *mcd, char *data) {
	FILE *f;
	int i = 0;
	int s = MCD_SIZE;

	if (strstr(mcd, ".gme")) {
		f = fopen(mcd, "wb");
		if (f != NULL) {
			fwrite(data - 3904, 1, MCD_SIZE + 3904, f);
			fclose(f);
		}
		f = fopen(mcd, "r+");
		s = s + 3904;
		fputc('1', f); s--;
		fputc('2', f); s--;
		fputc('3', f); s--;
		fputc('-', f); s--;
		fputc('4', f); s--;
		fputc('5', f); s--;
		fputc('6', f); s--;
		fputc('-', f); s--;
		fputc('S', f); s--;
		fputc('T', f); s--;
		fputc('D', f); s--;
		for (i = 0; i < 7; i++) {
			fputc(0, f); s--;
		}
		fputc(1, f); s--;
		fputc(0, f); s--;
		fputc(1, f); s--;
		fputc('M', f); s--;
		fputc('Q', f); s--;
		for(i=0;i<14;i++) {
			fputc(0xa0, f); s--;
		}
		fputc(0, f); s--;
		fputc(0xff, f);
		while (s-- > (MCD_SIZE+1)) fputc(0, f);
		fclose(f);
	} else if(strstr(mcd, ".mem") || strstr(mcd,".vgs")) {
		f = fopen(mcd, "wb");
		if (f != NULL) {
			fwrite(data-64, 1, MCD_SIZE+64, f);
			fclose(f);
		}
		f = fopen(mcd, "r+");
		s = s + 64;
		fputc('V', f); s--;
		fputc('g', f); s--;
		fputc('s', f); s--;
		fputc('M', f); s--;
		for(i=0;i<3;i++) {
			fputc(1, f); s--;
			fputc(0, f); s--;
			fputc(0, f); s--;
			fputc(0, f); s--;
		}
		fputc(0, f); s--;
		fputc(2, f);
		while (s-- > (MCD_SIZE+1)) fputc(0, f);
		fclose(f);
	} else {
		f = fopen(mcd, "wb");
		if (f != NULL) {
			fwrite(data, 1, MCD_SIZE, f);
			fclose(f);
		}
	}
}

void GetMcdBlockInfo(int mcd, int block, McdBlock *Info) {
	char *data = NULL, *ptr, *str, *sstr;
	unsigned short clut[16];
	unsigned short c;
	int i, x;

	memset(Info, 0, sizeof(McdBlock));

	if (mcd != 1 && mcd != 2)
		return;

	if (McdDisable[mcd - 1])
		return;

	if (mcd == 1) data = Mcd1Data;
	if (mcd == 2) data = Mcd2Data;

	ptr = data + block * 8192 + 2;

	Info->IconCount = *ptr & 0x3;

	ptr += 2;

	x = 0;

	str = Info->Title;
	sstr = Info->sTitle;

	for (i = 0; i < 48; i++) {
		c = *(ptr) << 8;
		c |= *(ptr + 1);
		if (!c) break;

		// Convert ASCII characters to half-width
		if (c >= 0x8281 && c <= 0x829A)
			c = (c - 0x8281) + 'a';
		else if (c >= 0x824F && c <= 0x827A)
			c = (c - 0x824F) + '0';
		else if (c == 0x8140) c = ' ';
		else if (c == 0x8143) c = ',';
		else if (c == 0x8144) c = '.';
		else if (c == 0x8146) c = ':';
		else if (c == 0x8147) c = ';';
		else if (c == 0x8148) c = '?';
		else if (c == 0x8149) c = '!';
		else if (c == 0x815E) c = '/';
		else if (c == 0x8168) c = '"';
		else if (c == 0x8169) c = '(';
		else if (c == 0x816A) c = ')';
		else if (c == 0x816D) c = '[';
		else if (c == 0x816E) c = ']';
		else if (c == 0x817C) c = '-';
		else {
			str[i] = ' ';
			sstr[x++] = *ptr++; sstr[x++] = *ptr++;
			continue;
		}

		str[i] = sstr[x++] = c;
		ptr += 2;
	}

	trim(str);
	trim(sstr);

	ptr = data + block * 8192 + 0x60; // icon palette data

	for (i = 0; i < 16; i++) {
		clut[i] = *((unsigned short *)ptr);
		ptr += 2;
	}

	for (i = 0; i < Info->IconCount; i++) {
		short *icon = &Info->Icon[i * 16 * 16];

		ptr = data + block * 8192 + 128 + 128 * i; // icon data

		for (x = 0; x < 16 * 16; x++) {
			icon[x++] = clut[*ptr & 0xf];
			icon[x] = clut[*ptr >> 4];
			ptr++;
		}
	}

	ptr = data + block * 128;

	Info->Flags = *ptr;

	ptr += 0xa;
	strncpy(Info->ID, ptr, 12);
	ptr += 12;
	strncpy(Info->Name, ptr, 16);
}

int sioFreeze(void *f, int Mode) {
	gzfreeze(buf, sizeof(buf));
	gzfreeze(&StatReg, sizeof(StatReg));
	gzfreeze(&ModeReg, sizeof(ModeReg));
	gzfreeze(&CtrlReg, sizeof(CtrlReg));
	gzfreeze(&BaudReg, sizeof(BaudReg));
	gzfreeze(&bufcount, sizeof(bufcount));
	gzfreeze(&parp, sizeof(parp));
	gzfreeze(&mcdst, sizeof(mcdst));
	gzfreeze(&rdwr, sizeof(rdwr));
	gzfreeze(&adrH, sizeof(adrH));
	gzfreeze(&adrL, sizeof(adrL));
	gzfreeze(&padst, sizeof(padst));

	return 0;
}
Commit	Line	Data
ef79bbde P	1	/***************************************************************************
	2	* Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team *
	3	* *
	4	* This program is free software; you can redistribute it and/or modify *
	5	* it under the terms of the GNU General Public License as published by *
	6	* the Free Software Foundation; either version 2 of the License, or *
	7	* (at your option) any later version. *
	8	* *
	9	* This program is distributed in the hope that it will be useful, *
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
	12	* GNU General Public License for more details. *
	13	* *
	14	* You should have received a copy of the GNU General Public License *
	15	* along with this program; if not, write to the *
	16	* Free Software Foundation, Inc., *
	17	* 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. *
	18	***************************************************************************/
	19
	20	/*
	21	* SIO functions.
	22	*/
	23
	24	#include "sio.h"
	25	#include <sys/stat.h>
	26
226a5691	27	#ifdef USE_LIBRETRO_VFS
	28	#include <streams/file_stream_transforms.h>
	29	#endif
	30
ef79bbde P	31	// Status Flags
	32	#define TX_RDY 0x0001
	33	#define RX_RDY 0x0002
	34	#define TX_EMPTY 0x0004
	35	#define PARITY_ERR 0x0008
	36	#define RX_OVERRUN 0x0010
	37	#define FRAMING_ERR 0x0020
	38	#define SYNC_DETECT 0x0040
	39	#define DSR 0x0080
	40	#define CTS 0x0100
	41	#define IRQ 0x0200
	42
	43	// Control Flags
	44	#define TX_PERM 0x0001
	45	#define DTR 0x0002
	46	#define RX_PERM 0x0004
	47	#define BREAK 0x0008
	48	#define RESET_ERR 0x0010
	49	#define RTS 0x0020
	50	#define SIO_RESET 0x0040
	51
	52	// * FOR WORKS ON PADS AND MEMORY CARDS ***
	53
	54	static unsigned char buf[256];
f3a77032	55	static unsigned char cardh1[4] = { 0xff, 0x08, 0x5a, 0x5d };
f3a77032	56	static unsigned char cardh2[4] = { 0xff, 0x08, 0x5a, 0x5d };
ef79bbde P	57
	58	// Transfer Ready and the Buffer is Empty
	59	// static unsigned short StatReg = 0x002b;
	60	static unsigned short StatReg = TX_RDY \| TX_EMPTY;
	61	static unsigned short ModeReg;
	62	static unsigned short CtrlReg;
	63	static unsigned short BaudReg;
	64
	65	static unsigned int bufcount;
	66	static unsigned int parp;
	67	static unsigned int mcdst, rdwr;
	68	static unsigned char adrH, adrL;
	69	static unsigned int padst;
	70
	71	char Mcd1Data[MCD_SIZE], Mcd2Data[MCD_SIZE];
f3a77032	72	char McdDisable[2];
ef79bbde	73
d28b54b1	74	#define SIO_INT(eCycle) { \
	75	if (!Config.Sio) { \
	76	psxRegs.interrupt \|= (1 << PSXINT_SIO); \
	77	psxRegs.intCycle[PSXINT_SIO].cycle = eCycle; \
	78	psxRegs.intCycle[PSXINT_SIO].sCycle = psxRegs.cycle; \
	79	new_dyna_set_event(PSXINT_SIO, eCycle); \
	80	} \
	81	}
	82
ef79bbde P	83	// clk cycle byte
	84	// 4us * 8bits = (PSXCLK / 1000000) * 32; (linuzappz)
	85	// TODO: add SioModePrescaler and BaudReg
d28b54b1	86	#define SIO_CYCLES 535
ef79bbde P	87
	88	void sioWrite8(unsigned char value) {
	89	#ifdef PAD_LOG
	90	PAD_LOG("sio write8 %x\n", value);
	91	#endif
	92	switch (padst) {
d28b54b1	93	case 1: SIO_INT(SIO_CYCLES);
ef79bbde P	94	if ((value & 0x40) == 0x40) {
	95	padst = 2; parp = 1;
	96	if (!Config.UseNet) {
	97	switch (CtrlReg & 0x2002) {
	98	case 0x0002:
	99	buf[parp] = PAD1_poll(value);
	100	break;
	101	case 0x2002:
	102	buf[parp] = PAD2_poll(value);
	103	break;
	104	}
	105	}/* else {
	106	// SysPrintf("%x: %x, %x, %x, %x\n", CtrlReg&0x2002, buf[2], buf[3], buf[4], buf[5]);
	107	}*/
	108
	109	if (!(buf[parp] & 0x0f)) {
	110	bufcount = 2 + 32;
	111	} else {
	112	bufcount = 2 + (buf[parp] & 0x0f) * 2;
	113	}
	114	if (buf[parp] == 0x41) {
	115	switch (value) {
	116	case 0x43:
	117	buf[1] = 0x43;
	118	break;
	119	case 0x45:
	120	buf[1] = 0xf3;
	121	break;
	122	}
	123	}
b62c0ebc	124	// NegCon - Wipeout 3
	125	if( buf[parp] == 0x23 ) {
	126	switch (value) {
	127	// enter config mode
	128	case 0x43:
	129	buf[1] = 0x79;
	130	break;
	131
	132	// get status
	133	case 0x45:
	134	buf[1] = 0xf3;
	135	break;
	136	}
	137	}
ef79bbde P	138	}
	139	else padst = 0;
	140	return;
	141	case 2:
	142	parp++;
	143	/* if (buf[1] == 0x45) {
	144	buf[parp] = 0;
d28b54b1	145	SIO_INT(SIO_CYCLES);
ef79bbde P	146	return;
	147	}*/
	148	if (!Config.UseNet) {
	149	switch (CtrlReg & 0x2002) {
	150	case 0x0002: buf[parp] = PAD1_poll(value); break;
	151	case 0x2002: buf[parp] = PAD2_poll(value); break;
	152	}
	153	}
	154
	155	if (parp == bufcount) { padst = 0; return; }
d28b54b1	156	SIO_INT(SIO_CYCLES);
ef79bbde P	157	return;
	158	}
	159
	160	switch (mcdst) {
	161	case 1:
d28b54b1	162	SIO_INT(SIO_CYCLES);
ef79bbde P	163	if (rdwr) { parp++; return; }
	164	parp = 1;
	165	switch (value) {
	166	case 0x52: rdwr = 1; break;
	167	case 0x57: rdwr = 2; break;
	168	default: mcdst = 0;
	169	}
	170	return;
	171	case 2: // address H
d28b54b1	172	SIO_INT(SIO_CYCLES);
ef79bbde P	173	adrH = value;
	174	*buf = 0;
	175	parp = 0;
	176	bufcount = 1;
	177	mcdst = 3;
	178	return;
	179	case 3: // address L
d28b54b1	180	SIO_INT(SIO_CYCLES);
ef79bbde P	181	adrL = value;
	182	*buf = adrH;
	183	parp = 0;
	184	bufcount = 1;
	185	mcdst = 4;
	186	return;
	187	case 4:
d28b54b1	188	SIO_INT(SIO_CYCLES);
ef79bbde P	189	parp = 0;
	190	switch (rdwr) {
	191	case 1: // read
	192	buf[0] = 0x5c;
	193	buf[1] = 0x5d;
	194	buf[2] = adrH;
	195	buf[3] = adrL;
	196	switch (CtrlReg & 0x2002) {
	197	case 0x0002:
	198	memcpy(&buf[4], Mcd1Data + (adrL \| (adrH << 8)) * 128, 128);
	199	break;
	200	case 0x2002:
	201	memcpy(&buf[4], Mcd2Data + (adrL \| (adrH << 8)) * 128, 128);
	202	break;
	203	}
	204	{
	205	char xor = 0;
	206	int i;
	207	for (i = 2; i < 128 + 4; i++)
	208	xor ^= buf[i];
	209	buf[132] = xor;
	210	}
	211	buf[133] = 0x47;
	212	bufcount = 133;
	213	break;
	214	case 2: // write
	215	buf[0] = adrL;
	216	buf[1] = value;
	217	buf[129] = 0x5c;
	218	buf[130] = 0x5d;
	219	buf[131] = 0x47;
	220	bufcount = 131;
	221	break;
	222	}
	223	mcdst = 5;
	224	return;
	225	case 5:
	226	parp++;
f3a77032	227	if ((rdwr == 1 && parp == 132) \|\|
	228	(rdwr == 2 && parp == 129)) {
	229	// clear "new card" flags
	230	if (CtrlReg & 0x2000)
	231	cardh2[1] &= ~8;
	232	else
	233	cardh1[1] &= ~8;
	234	}
ef79bbde P	235	if (rdwr == 2) {
	236	if (parp < 128) buf[parp + 1] = value;
	237	}
d28b54b1	238	SIO_INT(SIO_CYCLES);
ef79bbde P	239	return;
	240	}
	241
	242	switch (value) {
	243	case 0x01: // start pad
	244	StatReg \|= RX_RDY; // Transfer is Ready
	245
	246	if (!Config.UseNet) {
	247	switch (CtrlReg & 0x2002) {
	248	case 0x0002: buf[0] = PAD1_startPoll(1); break;
	249	case 0x2002: buf[0] = PAD2_startPoll(2); break;
	250	}
	251	} else {
	252	if ((CtrlReg & 0x2002) == 0x0002) {
	253	int i, j;
	254
	255	PAD1_startPoll(1);
	256	buf[0] = 0;
	257	buf[1] = PAD1_poll(0x42);
	258	if (!(buf[1] & 0x0f)) {
	259	bufcount = 32;
	260	} else {
	261	bufcount = (buf[1] & 0x0f) * 2;
	262	}
	263	buf[2] = PAD1_poll(0);
	264	i = 3;
	265	j = bufcount;
	266	while (j--) {
	267	buf[i++] = PAD1_poll(0);
	268	}
	269	bufcount+= 3;
	270
	271	if (NET_sendPadData(buf, bufcount) == -1)
	272	netError();
	273
	274	if (NET_recvPadData(buf, 1) == -1)
	275	netError();
	276	if (NET_recvPadData(buf + 128, 2) == -1)
	277	netError();
	278	} else {
	279	memcpy(buf, buf + 128, 32);
	280	}
	281	}
	282
	283	bufcount = 2;
	284	parp = 0;
	285	padst = 1;
d28b54b1	286	SIO_INT(SIO_CYCLES);
ef79bbde P	287	return;
ef79bbde P	288	case 0x81: // start memcard
f3a77032	289	if (CtrlReg & 0x2000)
	290	{
	291	if (McdDisable[1])
	292	goto no_device;
	293	memcpy(buf, cardh2, 4);
	294	}
	295	else
	296	{
	297	if (McdDisable[0])
	298	goto no_device;
	299	memcpy(buf, cardh1, 4);
	300	}
ef79bbde	301	StatReg \|= RX_RDY;
ef79bbde P	302	parp = 0;
	303	bufcount = 3;
	304	mcdst = 1;
	305	rdwr = 0;
d28b54b1	306	SIO_INT(SIO_CYCLES);
ef79bbde	307	return;
f3a77032	308	default:
	309	no_device:
	310	StatReg \|= RX_RDY;
	311	buf[0] = 0xff;
	312	parp = 0;
	313	bufcount = 0;
	314	return;
ef79bbde P	315	}
	316	}
	317
	318	void sioWriteStat16(unsigned short value) {
	319	}
	320
	321	void sioWriteMode16(unsigned short value) {
	322	ModeReg = value;
	323	}
	324
	325	void sioWriteCtrl16(unsigned short value) {
	326	CtrlReg = value & ~RESET_ERR;
	327	if (value & RESET_ERR) StatReg &= ~IRQ;
7d95d6fa	328	if ((CtrlReg & SIO_RESET) \|\| !(CtrlReg & DTR)) {
ef79bbde P	329	padst = 0; mcdst = 0; parp = 0;
ef79bbde P	330	StatReg = TX_RDY \| TX_EMPTY;
d28b54b1	331	psxRegs.interrupt &= ~(1 << PSXINT_SIO);
ef79bbde P	332	}
	333	}
	334
	335	void sioWriteBaud16(unsigned short value) {
	336	BaudReg = value;
	337	}
	338
	339	unsigned char sioRead8() {
	340	unsigned char ret = 0;
	341
	342	if ((StatReg & RX_RDY)/* && (CtrlReg & RX_PERM)*/) {
	343	// StatReg &= ~RX_OVERRUN;
	344	ret = buf[parp];
	345	if (parp == bufcount) {
	346	StatReg &= ~RX_RDY; // Receive is not Ready now
	347	if (mcdst == 5) {
	348	mcdst = 0;
	349	if (rdwr == 2) {
	350	switch (CtrlReg & 0x2002) {
	351	case 0x0002:
	352	memcpy(Mcd1Data + (adrL \| (adrH << 8)) * 128, &buf[1], 128);
	353	SaveMcd(Config.Mcd1, Mcd1Data, (adrL \| (adrH << 8)) * 128, 128);
	354	break;
	355	case 0x2002:
	356	memcpy(Mcd2Data + (adrL \| (adrH << 8)) * 128, &buf[1], 128);
	357	SaveMcd(Config.Mcd2, Mcd2Data, (adrL \| (adrH << 8)) * 128, 128);
	358	break;
	359	}
	360	}
	361	}
	362	if (padst == 2) padst = 0;
	363	if (mcdst == 1) {
	364	mcdst = 2;
	365	StatReg\|= RX_RDY;
	366	}
	367	}
	368	}
	369
	370	#ifdef PAD_LOG
	371	PAD_LOG("sio read8 ;ret = %x\n", ret);
	372	#endif
	373	return ret;
	374	}
	375
	376	unsigned short sioReadStat16() {
	377	return StatReg;
	378	}
	379
	380	unsigned short sioReadMode16() {
	381	return ModeReg;
	382	}
	383
	384	unsigned short sioReadCtrl16() {
	385	return CtrlReg;
	386	}
	387
	388	unsigned short sioReadBaud16() {
	389	return BaudReg;
	390	}
	391
	392	void netError() {
	393	ClosePlugins();
	394	SysMessage(_("Connection closed!\n"));
	395
396	CdromId[0] = '\0';
397	CdromLabel[0] = '\0';
398
399	SysRunGui();
400	}
401
402	void sioInterrupt() {
403	#ifdef PAD_LOG
404	PAD_LOG("Sio Interrupt (CP0.Status = %x)\n", psxRegs.CP0.n.Status);
405	#endif
406	// SysPrintf("Sio Interrupt\n");
aa35134a	407	if (!(StatReg & IRQ)) {
	408	StatReg \|= IRQ;
	409	psxHu32ref(0x1070) \|= SWAPu32(0x80);
	410	}
ef79bbde P	411	}
	412
	413	void LoadMcd(int mcd, char *str) {
	414	FILE *f;
	415	char *data = NULL;
	416
f3a77032	417	if (mcd != 1 && mcd != 2)
f3a77032	418	return;
ef79bbde	419
f3a77032	420	if (mcd == 1) {
	421	data = Mcd1Data;
	422	cardh1[1] \|= 8; // mark as new
	423	}
	424	if (mcd == 2) {
	425	data = Mcd2Data;
	426	cardh2[1] \|= 8;
	427	}
	428
	429	McdDisable[mcd - 1] = 0;
5bf56268	430	#ifdef HAVE_LIBRETRO
	431	// memcard1 is handled by libretro
	432	if (mcd == 1)
	433	return;
	434	#endif
	435
6f18d16a	436	if (str == NULL \|\| strcmp(str, "none") == 0) {
f3a77032	437	McdDisable[mcd - 1] = 1;
f3a77032	438	return;
ef79bbde	439	}
6f18d16a	440	if (*str == 0)
	441	return;
	442
226a5691	443	f = fopen(str, "rb");
ef79bbde P	444	if (f == NULL) {
	445	SysPrintf(_("The memory card %s doesn't exist - creating it\n"), str);
	446	CreateMcd(str);
226a5691	447	f = fopen(str, "rb");
ef79bbde P	448	if (f != NULL) {
	449	struct stat buf;
	450
	451	if (stat(str, &buf) != -1) {
	452	if (buf.st_size == MCD_SIZE + 64)
	453	fseek(f, 64, SEEK_SET);
	454	else if(buf.st_size == MCD_SIZE + 3904)
	455	fseek(f, 3904, SEEK_SET);
	456	}
	457	fread(data, 1, MCD_SIZE, f);
	458	fclose(f);
	459	}
	460	else
	461	SysMessage(_("Memory card %s failed to load!\n"), str);
	462	}
	463	else {
	464	struct stat buf;
	465	SysPrintf(_("Loading memory card %s\n"), str);
	466	if (stat(str, &buf) != -1) {
	467	if (buf.st_size == MCD_SIZE + 64)
	468	fseek(f, 64, SEEK_SET);
	469	else if(buf.st_size == MCD_SIZE + 3904)
	470	fseek(f, 3904, SEEK_SET);
	471	}
	472	fread(data, 1, MCD_SIZE, f);
	473	fclose(f);
	474	}
	475	}
	476
	477	void LoadMcds(char mcd1, char mcd2) {
	478	LoadMcd(1, mcd1);
	479	LoadMcd(2, mcd2);
	480	}
	481
	482	void SaveMcd(char mcd, char data, uint32_t adr, int size) {
	483	FILE *f;
	484
6f18d16a	485	if (mcd == NULL \|\| *mcd == 0 \|\| strcmp(mcd, "none") == 0)
	486	return;
	487
226a5691	488	f = fopen(mcd, "r+b");
ef79bbde P	489	if (f != NULL) {
	490	struct stat buf;
	491
	492	if (stat(mcd, &buf) != -1) {
	493	if (buf.st_size == MCD_SIZE + 64)
	494	fseek(f, adr + 64, SEEK_SET);
	495	else if (buf.st_size == MCD_SIZE + 3904)
	496	fseek(f, adr + 3904, SEEK_SET);
	497	else
	498	fseek(f, adr, SEEK_SET);
	499	} else
	500	fseek(f, adr, SEEK_SET);
	501
	502	fwrite(data + adr, 1, size, f);
	503	fclose(f);
	504	return;
	505	}
	506
	507	#if 0
	508	// try to create it again if we can't open it
	509	f = fopen(mcd, "wb");
	510	if (f != NULL) {
	511	fwrite(data, 1, MCD_SIZE, f);
	512	fclose(f);
	513	}
	514	#endif
	515
	516	ConvertMcd(mcd, data);
	517	}
	518
	519	void CreateMcd(char *mcd) {
	520	FILE *f;
	521	struct stat buf;
	522	int s = MCD_SIZE;
	523	int i = 0, j;
	524
226a5691	525	f = fopen(mcd, "wb");
ef79bbde P	526	if (f == NULL)
	527	return;
	528
	529	if (stat(mcd, &buf) != -1) {
	530	if ((buf.st_size == MCD_SIZE + 3904) \|\| strstr(mcd, ".gme")) {
	531	s = s + 3904;
	532	fputc('1', f);
	533	s--;
	534	fputc('2', f);
	535	s--;
	536	fputc('3', f);
	537	s--;
	538	fputc('-', f);
	539	s--;
	540	fputc('4', f);
	541	s--;
	542	fputc('5', f);
	543	s--;
	544	fputc('6', f);
	545	s--;
	546	fputc('-', f);
	547	s--;
	548	fputc('S', f);
	549	s--;
	550	fputc('T', f);
	551	s--;
	552	fputc('D', f);
	553	s--;
	554	for (i = 0; i < 7; i++) {
	555	fputc(0, f);
	556	s--;
	557	}
	558	fputc(1, f);
	559	s--;
	560	fputc(0, f);
	561	s--;
	562	fputc(1, f);
	563	s--;
	564	fputc('M', f);
	565	s--;
	566	fputc('Q', f);
	567	s--;
	568	for (i = 0; i < 14; i++) {
	569	fputc(0xa0, f);
	570	s--;
	571	}
	572	fputc(0, f);
	573	s--;
	574	fputc(0xff, f);
	575	while (s-- > (MCD_SIZE + 1))
	576	fputc(0, f);
	577	} else if ((buf.st_size == MCD_SIZE + 64) \|\| strstr(mcd, ".mem") \|\| strstr(mcd, ".vgs")) {
	578	s = s + 64;
	579	fputc('V', f);
	580	s--;
	581	fputc('g', f);
	582	s--;
	583	fputc('s', f);
	584	s--;
	585	fputc('M', f);
	586	s--;
	587	for (i = 0; i < 3; i++) {
	588	fputc(1, f);
	589	s--;
590	fputc(0, f);
591	s--;
592	fputc(0, f);
593	s--;
594	fputc(0, f);
595	s--;
596	}
597	fputc(0, f);
598	s--;
599	fputc(2, f);
600	while (s-- > (MCD_SIZE + 1))
601	fputc(0, f);
602	}
603	}
604	fputc('M', f);
605	s--;
606	fputc('C', f);
607	s--;
608	while (s-- > (MCD_SIZE - 127))
609	fputc(0, f);
610	fputc(0xe, f);
611	s--;
612
613	for (i = 0; i < 15; i++) { // 15 blocks
614	fputc(0xa0, f);
615	s--;
616	fputc(0x00, f);
617	s--;
618	fputc(0x00, f);
619	s--;
620	fputc(0x00, f);
621	s--;
622	fputc(0x00, f);
623	s--;
624	fputc(0x00, f);
625	s--;
626	fputc(0x00, f);
627	s--;
628	fputc(0x00, f);
629	s--;
630	fputc(0xff, f);
631	s--;
632	fputc(0xff, f);
633	s--;
634	for (j = 0; j < 117; j++) {
635	fputc(0x00, f);
636	s--;
637	}
638	fputc(0xa0, f);
639	s--;
640	}
641
642	for (i = 0; i < 20; i++) {
643	fputc(0xff, f);
644	s--;
645	fputc(0xff, f);
646	s--;
647	fputc(0xff, f);
648	s--;
649	fputc(0xff, f);
650	s--;
651	fputc(0x00, f);
652	s--;
653	fputc(0x00, f);
654	s--;
655	fputc(0x00, f);
656	s--;
657	fputc(0x00, f);
658	s--;
659	fputc(0xff, f);
660	s--;
661	fputc(0xff, f);
662	s--;
663	for (j = 0; j < 118; j++) {
664	fputc(0x00, f);
665	s--;
666	}
667	}
668
669	while ((s--) >= 0)
670	fputc(0, f);
671
672	fclose(f);
673	}
674
675	void ConvertMcd(char mcd, char data) {
676	FILE *f;
677	int i = 0;
678	int s = MCD_SIZE;
679
680	if (strstr(mcd, ".gme")) {
681	f = fopen(mcd, "wb");
682	if (f != NULL) {
683	fwrite(data - 3904, 1, MCD_SIZE + 3904, f);
684	fclose(f);
685	}
686	f = fopen(mcd, "r+");
687	s = s + 3904;
688	fputc('1', f); s--;
689	fputc('2', f); s--;
690	fputc('3', f); s--;
691	fputc('-', f); s--;
692	fputc('4', f); s--;
693	fputc('5', f); s--;
694	fputc('6', f); s--;
695	fputc('-', f); s--;
696	fputc('S', f); s--;
697	fputc('T', f); s--;
698	fputc('D', f); s--;
699	for (i = 0; i < 7; i++) {
700	fputc(0, f); s--;
701	}
702	fputc(1, f); s--;
703	fputc(0, f); s--;
704	fputc(1, f); s--;
705	fputc('M', f); s--;
706	fputc('Q', f); s--;
707	for(i=0;i<14;i++) {
708	fputc(0xa0, f); s--;
709	}
710	fputc(0, f); s--;
711	fputc(0xff, f);
712	while (s-- > (MCD_SIZE+1)) fputc(0, f);
713	fclose(f);
714	} else if(strstr(mcd, ".mem") \|\| strstr(mcd,".vgs")) {
715	f = fopen(mcd, "wb");
716	if (f != NULL) {
717	fwrite(data-64, 1, MCD_SIZE+64, f);
718	fclose(f);
719	}
720	f = fopen(mcd, "r+");
721	s = s + 64;
722	fputc('V', f); s--;
723	fputc('g', f); s--;
724	fputc('s', f); s--;
725	fputc('M', f); s--;
726	for(i=0;i<3;i++) {
727	fputc(1, f); s--;
728	fputc(0, f); s--;
729	fputc(0, f); s--;
730	fputc(0, f); s--;
731	}
732	fputc(0, f); s--;
733	fputc(2, f);
734	while (s-- > (MCD_SIZE+1)) fputc(0, f);
735	fclose(f);
736	} else {
737	f = fopen(mcd, "wb");
738	if (f != NULL) {
739	fwrite(data, 1, MCD_SIZE, f);
740	fclose(f);
741	}
742	}
743	}
744
745	void GetMcdBlockInfo(int mcd, int block, McdBlock *Info) {
ab948f7e	746	char data = NULL, ptr, str, sstr;
ef79bbde P	747	unsigned short clut[16];
	748	unsigned short c;
	749	int i, x;
	750
	751	memset(Info, 0, sizeof(McdBlock));
	752
f3a77032	753	if (mcd != 1 && mcd != 2)
	754	return;
	755
	756	if (McdDisable[mcd - 1])
	757	return;
	758
ef79bbde P	759	if (mcd == 1) data = Mcd1Data;
	760	if (mcd == 2) data = Mcd2Data;
	761
	762	ptr = data + block * 8192 + 2;
	763
	764	Info->IconCount = *ptr & 0x3;
	765
	766	ptr += 2;
	767
	768	x = 0;
	769
	770	str = Info->Title;
	771	sstr = Info->sTitle;
	772
	773	for (i = 0; i < 48; i++) {
	774	c = *(ptr) << 8;
	775	c \|= *(ptr + 1);
	776	if (!c) break;
	777
	778	// Convert ASCII characters to half-width
	779	if (c >= 0x8281 && c <= 0x829A)
	780	c = (c - 0x8281) + 'a';
	781	else if (c >= 0x824F && c <= 0x827A)
	782	c = (c - 0x824F) + '0';
	783	else if (c == 0x8140) c = ' ';
	784	else if (c == 0x8143) c = ',';
	785	else if (c == 0x8144) c = '.';
	786	else if (c == 0x8146) c = ':';
	787	else if (c == 0x8147) c = ';';
	788	else if (c == 0x8148) c = '?';
	789	else if (c == 0x8149) c = '!';
	790	else if (c == 0x815E) c = '/';
	791	else if (c == 0x8168) c = '"';
	792	else if (c == 0x8169) c = '(';
	793	else if (c == 0x816A) c = ')';
	794	else if (c == 0x816D) c = '[';
	795	else if (c == 0x816E) c = ']';
	796	else if (c == 0x817C) c = '-';
	797	else {
	798	str[i] = ' ';
	799	sstr[x++] = ptr++; sstr[x++] = ptr++;
	800	continue;
	801	}
	802
	803	str[i] = sstr[x++] = c;
	804	ptr += 2;
	805	}
	806
	807	trim(str);
	808	trim(sstr);
	809
	810	ptr = data + block * 8192 + 0x60; // icon palette data
	811
	812	for (i = 0; i < 16; i++) {
	813	clut[i] = ((unsigned short )ptr);
	814	ptr += 2;
	815	}
	816
	817	for (i = 0; i < Info->IconCount; i++) {
	818	short icon = &Info->Icon[i 16 * 16];
	819
	820	ptr = data + block * 8192 + 128 + 128 * i; // icon data
	821
	822	for (x = 0; x < 16 * 16; x++) {
823	icon[x++] = clut[*ptr & 0xf];
824	icon[x] = clut[*ptr >> 4];
825	ptr++;
826	}
827	}
828
829	ptr = data + block * 128;
830
831	Info->Flags = *ptr;
832
833	ptr += 0xa;
834	strncpy(Info->ID, ptr, 12);
835	ptr += 12;
836	strncpy(Info->Name, ptr, 16);
837	}
838
496d88d4	839	int sioFreeze(void *f, int Mode) {
ef79bbde P	840	gzfreeze(buf, sizeof(buf));
	841	gzfreeze(&StatReg, sizeof(StatReg));
	842	gzfreeze(&ModeReg, sizeof(ModeReg));
	843	gzfreeze(&CtrlReg, sizeof(CtrlReg));
	844	gzfreeze(&BaudReg, sizeof(BaudReg));
	845	gzfreeze(&bufcount, sizeof(bufcount));
	846	gzfreeze(&parp, sizeof(parp));
	847	gzfreeze(&mcdst, sizeof(mcdst));
	848	gzfreeze(&rdwr, sizeof(rdwr));
	849	gzfreeze(&adrH, sizeof(adrH));
	850	gzfreeze(&adrL, sizeof(adrL));
	851	gzfreeze(&padst, sizeof(padst));
	852
	853	return 0;
	854	}