From 5ba533776f6e8a3a0e56b104fc95e2c85ba09b3d Mon Sep 17 00:00:00 2001
From: "SND\\ckain_cp" <SND\ckain_cp@e17a0e51-4ae3-4d35-97c3-1a29b211df97>
Date: Thu, 28 Nov 2013 08:57:17 +0000
Subject: Added MCD directory read bit to SIO which is used to detect memory
 card plug events. Games that use directory caching do not show old contents
 if card is changed during run like FM3.

git-svn-id: https://pcsxr.svn.codeplex.com/svn/pcsxr@88003 e17a0e51-4ae3-4d35-97c3-1a29b211df97
---
 libpcsxcore/sio.c | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

(limited to 'libpcsxcore')

diff --git a/libpcsxcore/sio.c b/libpcsxcore/sio.c
index 7dd56327..deca287a 100755
--- a/libpcsxcore/sio.c
+++ b/libpcsxcore/sio.c
@@ -45,6 +45,9 @@
 #define RTS			0x0020
 #define SIO_RESET	0x0040
 
+// MCD flags
+#define MCDST_CHANGED 0x08
+
 // *** FOR WORKS ON PADS AND MEMORY CARDS *****
 
 
@@ -56,7 +59,7 @@ void SaveDongle( char *str );
 
 static unsigned char buf[ BUFFER_SIZE ];
 
-unsigned char cardh[4] = { 0x00, 0x00, 0x5a, 0x5d };
+unsigned char cardh[4] = { 0x00, 0x08, 0x5a, 0x5d };
 
 // Transfer Ready and the Buffer is Empty
 // static unsigned short StatReg = 0x002b;
@@ -141,7 +144,7 @@ unsigned char reverse_8( unsigned char bits )
 
 void sioWrite8(unsigned char value) {
 #ifdef PAD_LOG
-	PAD_LOG("sio write8 %x\n", value);
+	PAD_LOG("sio write8 %x (PAR:%x PAD:%x MCDL%x)\n", value, parp, padst, mcdst);
 #endif
 	switch (padst) {
 		case 1: SIO_INT(SIO_CYCLES);
@@ -281,11 +284,11 @@ void sioWrite8(unsigned char value) {
 							break;
 					}
 					{
-					char xor = 0;
+					char xorsum = 0;
 					int i;
 					for (i = 2; i < 128 + 4; i++)
-						xor ^= buf[i];
-					buf[132] = xor;
+						xorsum ^= buf[i];
+					buf[132] = xorsum;
 					}
 					buf[133] = 0x47;
 					bufcount = 133;
@@ -297,6 +300,7 @@ void sioWrite8(unsigned char value) {
 					buf[130] = 0x5d;
 					buf[131] = 0x47;
 					bufcount = 131;
+					cardh[1] &= ~MCDST_CHANGED;
 					break;
 			}
 			mcdst = 5;
@@ -758,6 +762,9 @@ void sioWriteMode16(unsigned short value) {
 }
 
 void sioWriteCtrl16(unsigned short value) {
+#ifdef PAD_LOG
+	PAD_LOG("sio ctrlwrite16 %x (PAR:%x PAD:%x MCD:%x)\n", value, parp, padst, mcdst);
+#endif
 	CtrlReg = value & ~RESET_ERR;
 	if (value & RESET_ERR) StatReg &= ~IRQ;
 	if ((CtrlReg & SIO_RESET) || (!CtrlReg)) {
@@ -803,7 +810,8 @@ unsigned char sioRead8() {
 	}
 
 #ifdef PAD_LOG
-	PAD_LOG("sio read8 ;ret = %x\n", ret);
+	PAD_LOG("sio read8 ;ret = %x (I:%x ST:%x BUF:(%x %x %x))\n", 
+			ret, parp, StatReg, buf[parp>0?parp-1:0], buf[parp], buf[parp<BUFFER_SIZE-1?parp+1:BUFFER_SIZE-1]);
 #endif
 	return ret;
 }
@@ -872,8 +880,8 @@ void LoadMcd(int mcd, char *str) {
 	if (mcd == 2) data = Mcd2Data;
 
 	if (*str == 0) {
-		sprintf(str, "memcards/card%d.mcd", mcd);
-		SysPrintf(_("No memory card value was specified - creating a default card %s\n"), str);
+		sprintf(str, "%s/.pcsxr/memcards/card%d.mcd", getenv("HOME"), mcd); // TODO: maybe just whine and quit..
+		SysPrintf(_("No memory card value was specified - using a default card %s\n"), str);
 	}
 	f = fopen(str, "rb");
 	if (f == NULL) {
@@ -907,6 +915,9 @@ void LoadMcd(int mcd, char *str) {
 		fread(data, 1, MCD_SIZE, f);
 		fclose(f);
 	}
+
+	// flag indicating entries have not yet been read (i.e. new card plugged)
+	cardh[1] |= MCDST_CHANGED;
 }
 
 void LoadMcds(char *mcd1, char *mcd2) {
-- 
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