/***************************************************************************
- * Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team *
+ * Copyright (C) 2019 Ryan Schultz, PCSX-df Team, PCSX team, gameblabla, *
+ * dmitrysmagin, senquack *
* *
* 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 *
* 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. *
***************************************************************************/
+/* Gameblabla 2018-2019 :
+ * Numerous changes to bios calls as well as improvements in order to conform to nocash's findings
+ * for the PSX bios calls. Thanks senquack for helping out with some of the changes
+ * and helping to spot issues and refine my patches.
+ * */
+
/*
* Internal simulated HLE BIOS.
*/
static int *pad_buf = NULL;
static char *pad_buf1 = NULL, *pad_buf2 = NULL;
static int pad_buf1len, pad_buf2len;
+static int pad_stopped = 0;
static u32 regs[35];
static EvCB *Event;
static EvCB *UeEV; // 0xf3
static EvCB *SwEV; // 0xf4
static EvCB *ThEV; // 0xff
+static u32 heap_size = 0;
static u32 *heap_addr = NULL;
static u32 *heap_end = NULL;
static u32 SysIntRP[8];
} else Event[ev][spec].status = EvStALREADY;
}
+static unsigned interrupt_r26=0x8004E8B0;
+
static inline void SaveRegs() {
memcpy(regs, psxRegs.GPR.r, 32*4);
regs[32] = psxRegs.GPR.n.lo;
// System calls A0 */
+#define buread(Ra1, mcd, length) { \
+ SysPrintf("read %d: %x,%x (%s)\n", FDesc[1 + mcd].mcfile, FDesc[1 + mcd].offset, a2, Mcd##mcd##Data + 128 * FDesc[1 + mcd].mcfile + 0xa); \
+ ptr = Mcd##mcd##Data + 8192 * FDesc[1 + mcd].mcfile + FDesc[1 + mcd].offset; \
+ memcpy(Ra1, ptr, length); \
+ if (FDesc[1 + mcd].mode & 0x8000) { \
+ DeliverEvent(0x11, 0x2); /* 0xf0000011, 0x0004 */ \
+ DeliverEvent(0x81, 0x2); /* 0xf4000001, 0x0004 */ \
+ v0 = 0; } \
+ else v0 = length; \
+ FDesc[1 + mcd].offset += v0; \
+}
+
+#define buwrite(Ra1, mcd, length) { \
+ u32 offset = + 8192 * FDesc[1 + mcd].mcfile + FDesc[1 + mcd].offset; \
+ SysPrintf("write %d: %x,%x\n", FDesc[1 + mcd].mcfile, FDesc[1 + mcd].offset, a2); \
+ ptr = Mcd##mcd##Data + offset; \
+ memcpy(ptr, Ra1, length); \
+ FDesc[1 + mcd].offset += length; \
+ if (FDesc[1 + mcd].mode & 0x8000) { \
+ DeliverEvent(0x11, 0x2); /* 0xf0000011, 0x0004 */ \
+ DeliverEvent(0x81, 0x2); /* 0xf4000001, 0x0004 */ \
+ v0 = 0; } \
+ else v0 = length; \
+}
+
+
+/* Internally redirects to "FileRead(fd,tempbuf,1)".*/
+/* For some strange reason, the returned character is sign-expanded; */
+/* So if a return value of FFFFFFFFh could mean either character FFh, or error. */
+/* TODO FIX ME : Properly implement this behaviour */
+void psxBios_getc(void) // 0x03, 0x35
+{
+ char *ptr;
+ void *pa1 = Ra1;
+#ifdef PSXBIOS_LOG
+ PSXBIOS_LOG("psxBios_%s\n", biosA0n[0x03]);
+#endif
+ v0 = -1;
+
+ if (pa1) {
+ switch (a0) {
+ case 2: buread(pa1, 1, 1); break;
+ case 3: buread(pa1, 2, 1); break;
+ }
+ }
+
+ pc0 = ra;
+}
+
+/* Copy of psxBios_write, except size is 1. */
+void psxBios_putc(void) // 0x09, 0x3B
+{
+ char *ptr;
+ void *pa1 = Ra1;
+#ifdef PSXBIOS_LOG
+ PSXBIOS_LOG("psxBios_%s\n", biosA0n[0x09]);
+#endif
+ v0 = -1;
+ if (!pa1) {
+ pc0 = ra;
+ return;
+ }
+
+ if (a0 == 1) { // stdout
+ char *ptr = (char *)pa1;
+
+ v0 = a2;
+ while (a2 > 0) {
+ printf("%c", *ptr++); a2--;
+ }
+ pc0 = ra; return;
+ }
+
+ switch (a0) {
+ case 2: buwrite(pa1, 1, 1); break;
+ case 3: buwrite(pa1, 2, 1); break;
+ }
+
+ pc0 = ra;
+}
+
+void psxBios_todigit(void) // 0x0a
+{
+ int c = a0;
+#ifdef PSXBIOS_LOG
+ PSXBIOS_LOG("psxBios_%s\n", biosA0n[0x0a]);
+#endif
+ c &= 0xFF;
+ if (c >= 0x30 && c < 0x3A) {
+ c -= 0x30;
+ }
+ else if (c > 0x60 && c < 0x7B) {
+ c -= 0x20;
+ }
+ else if (c > 0x40 && c < 0x5B) {
+ c = c - 0x41 + 10;
+ }
+ else if (c >= 0x80) {
+ c = -1;
+ }
+ else
+ {
+ c = 0x0098967F;
+ }
+ v0 = c;
+ pc0 = ra;
+}
+
void psxBios_abs() { // 0x0e
if ((s32)a0 < 0) v0 = -(s32)a0;
else v0 = a0;
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("psxBios_%s: %s, %s\n", biosA0n[0x15], Ra0, Ra1);
#endif
-
+ if (a0 == 0 || a1 == 0)
+ {
+ v0 = 0;
+ pc0 = ra;
+ return;
+ }
while (*p1++);
--p1;
while ((*p1++ = *p2++) != '\0');
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("psxBios_%s: %s (%x), %s (%x), %d\n", biosA0n[0x16], Ra0, a0, Ra1, a1, a2);
#endif
-
+ if (a0 == 0 || a1 == 0)
+ {
+ v0 = 0;
+ pc0 = ra;
+ return;
+ }
while (*p1++);
--p1;
while ((*p1++ = *p2++) != '\0') {
void psxBios_strcmp() { // 0x17
char *p1 = (char *)Ra0, *p2 = (char *)Ra1;
-
+ s32 n=0;
+ if (a0 == 0 && a1 == 0)
+ {
+ v0 = 0;
+ pc0 = ra;
+ return;
+ }
+ else if (a0 == 0 && a1 != 0)
+ {
+ v0 = -1;
+ pc0 = ra;
+ return;
+ }
+ else if (a0 != 0 && a1 == 0)
+ {
+ v0 = 1;
+ pc0 = ra;
+ return;
+ }
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("psxBios_%s: %s (%x), %s (%x)\n", biosA0n[0x17], Ra0, a0, Ra1, a1);
#endif
while (*p1 == *p2++) {
+ n++;
if (*p1++ == '\0') {
+ v1=n-1;
+ a0+=n;
+ a1+=n;
v0 = 0;
pc0 = ra;
return;
}
v0 = (*p1 - *--p2);
+ v1 = n;
+ a0+=n;
+ a1+=n;
pc0 = ra;
}
void psxBios_strncmp() { // 0x18
char *p1 = (char *)Ra0, *p2 = (char *)Ra1;
s32 n = a2;
-
+ if (a0 == 0 && a1 == 0)
+ {
+ v0 = 0;
+ pc0 = ra;
+ return;
+ }
+ else if (a0 == 0 && a1 != 0)
+ {
+ v0 = -1;
+ pc0 = ra;
+ return;
+ }
+ else if (a0 != 0 && a1 == 0)
+ {
+ v0 = 1;
+ pc0 = ra;
+ return;
+ }
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("psxBios_%s: %s (%x), %s (%x), %d\n", biosA0n[0x18], Ra0, a0, Ra1, a1, a2);
#endif
if (*p1++ == '\0') {
v0 = 0;
pc0 = ra;
+ v1 = a2 - ((a2-n) - 1);
+ a0 += (a2-n) - 1;
+ a1 += (a2-n) - 1;
+ a2 = n;
return;
}
}
v0 = (n < 0 ? 0 : *p1 - *--p2);
pc0 = ra;
+ v1 = a2 - ((a2-n) - 1);
+ a0 += (a2-n) - 1;
+ a1 += (a2-n) - 1;
+ a2 = n;
}
void psxBios_strcpy() { // 0x19
char *p1 = (char *)Ra0, *p2 = (char *)Ra1;
+ if (a0 == 0 || a1 == 0)
+ {
+ v0 = 0;
+ pc0 = ra;
+ return;
+ }
while ((*p1++ = *p2++) != '\0');
v0 = a0; pc0 = ra;
void psxBios_strncpy() { // 0x1a
char *p1 = (char *)Ra0, *p2 = (char *)Ra1;
s32 n = a2, i;
-
+ if (a0 == 0 || a1 == 0)
+ {
+ v0 = 0;
+ pc0 = ra;
+ return;
+ }
for (i = 0; i < n; i++) {
if ((*p1++ = *p2++) == '\0') {
while (++i < n) {
void psxBios_strlen() { // 0x1b
char *p = (char *)Ra0;
v0 = 0;
+ if (a0 == 0)
+ {
+ pc0 = ra;
+ return;
+ }
while (*p++) v0++;
pc0 = ra;
}
void psxBios_index() { // 0x1c
char *p = (char *)Ra0;
-
+ if (a0 == 0)
+ {
+ v0 = 0;
+ pc0 = ra;
+ return;
+ }
+
do {
if (*p == a1) {
v0 = a0 + (p - (char *)Ra0);
char *p = (char *)Ra0;
v0 = 0;
-
+ if (a0 == 0)
+ {
+ pc0 = ra;
+ return;
+ }
do {
if (*p == a1)
v0 = a0 + (p - (char *)Ra0);
void psxBios_bcopy() { // 0x27
char *p1 = (char *)Ra1, *p2 = (char *)Ra0;
+ v0 = a0;
+ if (a0 == 0 || a2 > 0x7FFFFFFF)
+ {
+ pc0 = ra;
+ return;
+ }
while ((s32)a2-- > 0) *p1++ = *p2++;
-
+ a2 = 0;
pc0 = ra;
}
void psxBios_bzero() { // 0x28
char *p = (char *)Ra0;
+ v0 = a0;
+ /* Same as memset here (See memset below) */
+ if (a1 > 0x7FFFFFFF || a1 == 0)
+ {
+ v0 = 0;
+ pc0 = ra;
+ return;
+ }
+ else if (a0 == 0)
+ {
+ pc0 = ra;
+ return;
+ }
while ((s32)a1-- > 0) *p++ = '\0';
-
+ a1 = 0;
pc0 = ra;
}
void psxBios_memcpy() { // 0x2a
char *p1 = (char *)Ra0, *p2 = (char *)Ra1;
- while ((s32)a2-- > 0) *p1++ = *p2++;
-
- v0 = a0; pc0 = ra;
+ v0 = a0;
+ if (a0 == 0 || a2 > 0x7FFFFFFF)
+ {
+ pc0 = ra;
+ return;
+ }
+ while ((s32)a2-- > 0) {
+ *p1++ = *p2++;
+ }
+ a2 = 0;
+ pc0 = ra;
}
void psxBios_memset() { // 0x2b
char *p = (char *)Ra0;
+ v0 = a0;
+ if (a2 > 0x7FFFFFFF || a2 == 0)
+ {
+ v0 = 0;
+ pc0 = ra;
+ return;
+ }
+ if (a0 == 0)
+ {
+ pc0 = ra;
+ return;
+ }
while ((s32)a2-- > 0) *p++ = (char)a1;
-
a2 = 0;
v0 = a0; pc0 = ra;
}
void psxBios_memmove() { // 0x2c
char *p1 = (char *)Ra0, *p2 = (char *)Ra1;
-
+ v0 = a0;
+ if (a0 == 0 || a2 > 0x7FFFFFFF)
+ {
+ pc0 = ra;
+ return;
+ }
if (p2 <= p1 && p2 + a2 > p1) {
a2++; // BUG: copy one more byte here
p1 += a2;
} else {
while ((s32)a2-- > 0) *p1++ = *p2++;
}
-
- v0 = a0; pc0 = ra;
+ pc0 = ra;
}
void psxBios_memcmp() { // 0x2d
void psxBios_memchr() { // 0x2e
char *p = (char *)Ra0;
+
+ if (a0 == 0 || a2 > 0x7FFFFFFF)
+ {
+ pc0 = ra;
+ return;
+ }
while ((s32)a2-- > 0) {
if (*p++ != (s8)a1) continue;
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("psxBios_%s\n", biosA0n[0x33]);
#endif
+ if (!a0 || (!heap_size || !heap_addr)) {
+ v0 = 0;
+ pc0 = ra;
+ return;
+ }
// scan through heap and combine free chunks of space
chunk = heap_addr;
csize = ((u32)*chunk) & 0xfffffffc;
cstat = ((u32)*chunk) & 1;
+ // most probably broken heap descriptor
+ // this fixes Burning Road
+ if (*chunk == 0) {
+ newchunk = chunk;
+ dsize = ((uptr)heap_end - (uptr)chunk) - 4;
+ colflag = 1;
+ break;
+ }
+
// it's a free chunk
if(cstat == 1) {
if(colflag == 0) {
// exit on uninitialized heap
if (chunk == NULL) {
- SysPrintf("malloc %x,%x: Uninitialized Heap!\n", v0, a0);
+ printf("malloc %x,%x: Uninitialized Heap!\n", v0, a0);
v0 = 0;
pc0 = ra;
return;
}
// search an unused chunk that is big enough until the end of the heap
- while ((dsize > csize || cstat == 0) && chunk < heap_end ) {
+ while ((dsize > csize || cstat==0) && chunk < heap_end ) {
chunk = (u32*)((uptr)chunk + csize + 4);
+
+ // catch out of memory
+ if(chunk >= heap_end) {
+ printf("malloc %x,%x: Out of memory error!\n",
+ v0, a0);
+ v0 = 0; pc0 = ra;
+ return;
+ }
+
csize = ((u32)*chunk) & 0xfffffffc;
cstat = ((u32)*chunk) & 1;
}
- // catch out of memory
- if(chunk >= heap_end) { SysPrintf("malloc %x,%x: Out of memory error!\n", v0, a0); v0 = 0; pc0 = ra; return; }
-
// allocate memory
if(dsize == csize) {
// chunk has same size
*chunk &= 0xfffffffc;
- }
- else {
+ } else if (dsize > csize) {
+ v0 = 0; pc0 = ra;
+ return;
+ } else {
// split free chunk
*chunk = SWAP32(dsize);
newchunk = (u32*)((uptr)chunk + dsize + 4);
}
// return pointer to allocated memory
- v0 = ((unsigned long)chunk - (unsigned long)psxM) + 4;
+ v0 = ((uptr)chunk - (uptr)psxM) + 4;
v0|= 0x80000000;
- SysPrintf ("malloc %x,%x\n", v0, a0);
+ //printf ("malloc %x,%x\n", v0, a0);
pc0 = ra;
}
SysPrintf("free %x: %x bytes\n", a0, *(u32*)(Ra0-4));
- *(u32*)(Ra0-4) |= 1; // set chunk to free
+ if (a0)
+ *(u32*)(Ra0-4) |= 1; // set chunk to free
pc0 = ra;
}
#endif
a0 = block;
- psxBios_free();
- a0 = size;
- psxBios_malloc();
+ /* If "old_buf" is zero, executes malloc(new_size), and returns r2=new_buf (or 0=failed). */
+ if (block == 0)
+ {
+ psxBios_malloc();
+ }
+ /* Else, if "new_size" is zero, executes free(old_buf), and returns r2=garbage. */
+ else if (size == 0)
+ {
+ psxBios_free();
+ }
+ /* Else, executes malloc(new_size), bcopy(old_buf,new_buf,new_size), and free(old_buf), and returns r2=new_buf (or 0=failed). */
+ /* Note that it is not quite implemented this way here. */
+ else
+ {
+ psxBios_free();
+ a0 = size;
+ psxBios_malloc();
+ }
}
size &= 0xfffffffc;
heap_addr = (u32 *)Ra0;
- heap_end = (u32 *)((u8 *)heap_addr + size);
- *heap_addr = SWAP32(size | 1);
+ heap_size = size;
+ heap_end = (u32 *)((u8 *)heap_addr + heap_size);
+ /* HACKFIX: Commenting out this line fixes GTA2 crash */
+ //*heap_addr = SWAP32(size | 1);
SysPrintf("InitHeap %x,%x : %x %x\n",a0,a1, (int)((uptr)heap_addr-(uptr)psxM), size);
GPU_writeData(0x0400000);
GPU_writeData(0x0200000);
GPU_writeData(0x0100000);
-
+ v0 = 0x1f801814;
pc0 = ra;
}
pc0 = ra;
}
+/* TODO FIXME : Not compliant. -1 indicates failure but using 1 for now. */
+void psxBios_get_cd_status(void) //a6
+{
+ v0 = 1;
+ pc0 = ra;
+}
+
void psxBios__card_info() { // ab
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("psxBios_%s: %x\n", biosA0n[0xab], a0);
#endif
-
+ u32 ret;
card_active_chan = a0;
-// DeliverEvent(0x11, 0x2); // 0xf0000011, 0x0004
- DeliverEvent(0x81, 0x2); // 0xf4000001, 0x0004
-
+ switch (card_active_chan)
+ {
+ case 0x00: case 0x01: case 0x02: case 0x03:
+ ret = Config.Mcd1[0] ? 0x2 : 0x8;
+ break;
+ case 0x10: case 0x11: case 0x12: case 0x13:
+ ret = Config.Mcd2[0] ? 0x2 : 0x8;
+ break;
+ default:
+#ifdef PSXBIOS_LOG
+ PSXBIOS_LOG("psxBios_%s: UNKNOWN PORT 0x%x\n", biosA0n[0xab], card_active_chan);
+#endif
+ ret = 0x11;
+ break;
+ }
+
+ DeliverEvent(0x11, 0x2); // 0xf4000001, 0x0004
+ DeliverEvent(0x81, ret); // 0xf4000001, 0x0004
v0 = 1; pc0 = ra;
}
ev = a0 & 0xff;
spec = (a0 >> 8) & 0xff;
-
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("psxBios_%s %x,%x\n", biosB0n[0x0a], ev, spec);
#endif
+ if (Event[ev][spec].status == EvStUNUSED)
+ {
+ v0 = 0;
+ pc0 = ra;
+ return;
+ }
- Event[ev][spec].status = EvStACTIVE;
+ if (Event[ev][spec].status == EvStALREADY)
+ {
+ /* Callback events (mode=EvMdINTR) do never set the ready flag (and thus WaitEvent would hang forever). */
+ if (!(Event[ev][spec].mode == EvMdINTR)) Event[ev][spec].status = EvStACTIVE;
+ v0 = 1;
+ pc0 = ra;
+ return;
+ }
- v0 = 1; pc0 = ra;
+ v0 = 0;
+ pc0 = ra;
}
void psxBios_TestEvent() { // 0b
ev = a0 & 0xff;
spec = (a0 >> 8) & 0xff;
- if (Event[ev][spec].status == EvStALREADY) {
- Event[ev][spec].status = EvStACTIVE; v0 = 1;
- } else v0 = 0;
+ if (Event[ev][spec].status == EvStALREADY)
+ {
+ if (!(Event[ev][spec].mode == EvMdINTR)) Event[ev][spec].status = EvStACTIVE;
+ v0 = 1;
+ }
+ else
+ {
+ v0 = 0;
+ }
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("psxBios_%s %x,%x: %x\n", biosB0n[0x0b], ev, spec, v0);
int th;
for (th=1; th<8; th++)
+ {
if (Thread[th].status == 0) break;
+ }
+ if (th == 8) {
+ // Feb 2019 - Added out-of-bounds fix caught by cppcheck:
+ // When no free TCB is found, return 0xffffffff according to Nocash doc.
+#ifdef PSXBIOS_LOG
+ PSXBIOS_LOG("\t%s() WARNING! No Free TCBs found!\n", __func__);
+#endif
+ v0 = 0xffffffff;
+ pc0 = ra;
+ return;
+ }
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("psxBios_%s: %x\n", biosB0n[0x0e], th);
#endif
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("psxBios_%s: %x\n", biosB0n[0x0f], th);
#endif
-
- if (Thread[th].status == 0) {
- v0 = 0;
- } else {
+ /* The return value is always 1 (even if the handle was already closed). */
+ v0 = 1;
+ if (Thread[th].status != 0) {
Thread[th].status = 0;
- v0 = 1;
}
pc0 = ra;
#ifdef PSXBIOS_LOG
// PSXBIOS_LOG("psxBios_%s: %x\n", biosB0n[0x10], th);
#endif
-
+ /* The return value is always 1. */
+ v0 = 1;
if (Thread[th].status == 0 || CurThread == th) {
- v0 = 0;
-
pc0 = ra;
} else {
- v0 = 1;
-
if (Thread[CurThread].status == 2) {
Thread[CurThread].status = 1;
Thread[CurThread].func = ra;
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("psxBios_%s\n", biosB0n[0x13]);
#endif
-
+ pad_stopped = 0;
psxHwWrite16(0x1f801074, (unsigned short)(psxHwRead16(0x1f801074) | 0x1));
psxRegs.CP0.n.Status |= 0x401;
pc0 = ra;
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("psxBios_%s\n", biosB0n[0x14]);
#endif
-
+ pad_stopped = 1;
pad_buf1 = NULL;
pad_buf2 = NULL;
pc0 = ra;
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("psxBios_%s\n", biosB0n[0x15]);
#endif
+ if (!(a0 == 0x20000000 || a0 == 0x20000001))
+ {
+ v0 = 0;
+ pc0 = ra;
+ return;
+ }
psxHwWrite16(0x1f801074, (u16)(psxHwRead16(0x1f801074) | 0x1));
pad_buf = (int *)Ra1;
*pad_buf = -1;
psxRegs.CP0.n.Status |= 0x401;
+ v0 = 2;
pc0 = ra;
}
LoadRegs();
pc0 = psxRegs.CP0.n.EPC;
+ k0 = interrupt_r26;
if (psxRegs.CP0.n.Cause & 0x80000000) pc0 += 4;
psxRegs.CP0.n.Status = (psxRegs.CP0.n.Status & 0xfffffff0) |
pc0 = ra;
}
-#define buopen(mcd) { \
- strcpy(FDesc[1 + mcd].name, Ra0+5); \
- FDesc[1 + mcd].offset = 0; \
- FDesc[1 + mcd].mode = a1; \
- \
- for (i=1; i<16; i++) { \
- ptr = Mcd##mcd##Data + 128 * i; \
- if ((*ptr & 0xF0) != 0x50) continue; \
- if (strcmp(FDesc[1 + mcd].name, ptr+0xa)) continue; \
- FDesc[1 + mcd].mcfile = i; \
- SysPrintf("open %s\n", ptr+0xa); \
- v0 = 1 + mcd; \
- break; \
- } \
- if (a1 & 0x200 && v0 == -1) { /* FCREAT */ \
- for (i=1; i<16; i++) { \
- int j, xor = 0; \
- \
- ptr = Mcd##mcd##Data + 128 * i; \
- if ((*ptr & 0xF0) == 0x50) continue; \
- ptr[0] = 0x50 | (u8)(a1 >> 16); \
- ptr[4] = 0x00; \
- ptr[5] = 0x20; \
- ptr[6] = 0x00; \
- ptr[7] = 0x00; \
- ptr[8] = 'B'; \
- ptr[9] = 'I'; \
- strcpy(ptr+0xa, FDesc[1 + mcd].name); \
- for (j=0; j<127; j++) xor^= ptr[j]; \
- ptr[127] = xor; \
- FDesc[1 + mcd].mcfile = i; \
- SysPrintf("openC %s\n", ptr); \
- v0 = 1 + mcd; \
- SaveMcd(Config.Mcd##mcd, Mcd##mcd##Data, 128 * i, 128); \
- break; \
- } \
- } \
+char ffile[64], *pfile;
+int nfile;
+static void buopen(int mcd, u8 *ptr, u8 *cfg)
+{
+ int i;
+ u8 *fptr = ptr;
+
+ strcpy(FDesc[1 + mcd].name, Ra0+5);
+ FDesc[1 + mcd].offset = 0;
+ FDesc[1 + mcd].mode = a1;
+
+ for (i=1; i<16; i++) {
+ fptr += 128;
+ if ((*fptr & 0xF0) != 0x50) continue;
+ if (strcmp(FDesc[1 + mcd].name, fptr+0xa)) continue;
+ FDesc[1 + mcd].mcfile = i;
+ SysPrintf("open %s\n", fptr+0xa);
+ v0 = 1 + mcd;
+ break;
+ }
+ if (a1 & 0x200 && v0 == -1) { /* FCREAT */
+ fptr = ptr;
+ for (i=1; i<16; i++) {
+ int j, xor, nblk = a1 >> 16;
+ u8 *pptr, *fptr2;
+
+ fptr += 128;
+ if ((*fptr & 0xF0) != 0xa0) continue;
+
+ FDesc[1 + mcd].mcfile = i;
+ fptr[0] = 0x51;
+ fptr[4] = 0x00;
+ fptr[5] = 0x20 * nblk;
+ fptr[6] = 0x00;
+ fptr[7] = 0x00;
+ strcpy(fptr+0xa, FDesc[1 + mcd].name);
+ pptr = fptr2 = fptr;
+ for(j=2; j<=nblk; j++) {
+ int k;
+ for(i++; i<16; i++) {
+ fptr2 += 128;
+
+ memset(fptr2, 0, 128);
+ fptr2[0] = j < nblk ? 0x52 : 0x53;
+ pptr[8] = i - 1;
+ pptr[9] = 0;
+ for (k=0, xor=0; k<127; k++) xor^= pptr[k];
+ pptr[127] = xor;
+ pptr = fptr2;
+ break;
+ }
+ /* shouldn't this return ENOSPC if i == 16? */
+ }
+ pptr[8] = pptr[9] = 0xff;
+ for (j=0, xor=0; j<127; j++) xor^= pptr[j];
+ pptr[127] = xor;
+ SysPrintf("openC %s %d\n", ptr, nblk);
+ v0 = 1 + mcd;
+ /* just go ahead and resave them all */
+ SaveMcd(cfg, ptr, 128, 128 * 15);
+ break;
+ }
+ /* shouldn't this return ENOSPC if i == 16? */
+ }
}
/*
if (pa0) {
if (!strncmp(pa0, "bu00", 4)) {
- buopen(1);
+ buopen(1, Mcd1Data, Config.Mcd1);
}
if (!strncmp(pa0, "bu10", 4)) {
- buopen(2);
+ buopen(2, Mcd2Data, Config.Mcd2);
}
}
pc0 = ra;
}
-#define buread(Ra1, mcd) { \
- SysPrintf("read %d: %x,%x (%s)\n", FDesc[1 + mcd].mcfile, FDesc[1 + mcd].offset, a2, Mcd##mcd##Data + 128 * FDesc[1 + mcd].mcfile + 0xa); \
- ptr = Mcd##mcd##Data + 8192 * FDesc[1 + mcd].mcfile + FDesc[1 + mcd].offset; \
- memcpy(Ra1, ptr, a2); \
- if (FDesc[1 + mcd].mode & 0x8000) v0 = 0; \
- else v0 = a2; \
- FDesc[1 + mcd].offset += v0; \
- DeliverEvent(0x11, 0x2); /* 0xf0000011, 0x0004 */ \
- DeliverEvent(0x81, 0x2); /* 0xf4000001, 0x0004 */ \
-}
/*
* int read(int fd , void *buf , int nbytes);
if (pa1) {
switch (a0) {
- case 2: buread(pa1, 1); break;
- case 3: buread(pa1, 2); break;
+ case 2: buread(pa1, 1, a2); break;
+ case 3: buread(pa1, 2, a2); break;
}
}
pc0 = ra;
}
-#define buwrite(Ra1, mcd) { \
- u32 offset = + 8192 * FDesc[1 + mcd].mcfile + FDesc[1 + mcd].offset; \
- SysPrintf("write %d: %x,%x\n", FDesc[1 + mcd].mcfile, FDesc[1 + mcd].offset, a2); \
- ptr = Mcd##mcd##Data + offset; \
- memcpy(ptr, Ra1, a2); \
- FDesc[1 + mcd].offset += a2; \
- SaveMcd(Config.Mcd##mcd, Mcd##mcd##Data, offset, a2); \
- if (FDesc[1 + mcd].mode & 0x8000) v0 = 0; \
- else v0 = a2; \
- DeliverEvent(0x11, 0x2); /* 0xf0000011, 0x0004 */ \
- DeliverEvent(0x81, 0x2); /* 0xf4000001, 0x0004 */ \
-}
-
/*
* int write(int fd , void *buf , int nbytes);
*/
}
switch (a0) {
- case 2: buwrite(pa1, 1); break;
- case 3: buwrite(pa1, 2); break;
+ case 2: buwrite(pa1, 1, a2); break;
+ case 3: buwrite(pa1, 2, a2); break;
}
pc0 = ra;
pc0 = ra;
}
-char ffile[64], *pfile;
-int nfile;
+
+/* To avoid any issues with different behaviour when using the libc's own strlen instead.
+ * We want to mimic the PSX's behaviour in this case for bufile. */
+static size_t strlen_internal(char* p)
+{
+ size_t size_of_array = 0;
+ while (*p++) size_of_array++;
+ return size_of_array;
+}
#define bufile(mcd) { \
+ size_t size_of_name = strlen_internal(dir->name); \
while (nfile < 16) { \
int match=1; \
\
- ptr = Mcd##mcd##Data + 128 * nfile; \
+ ptr = Mcd##mcd##Data + 128 * (nfile + 1); \
nfile++; \
if ((*ptr & 0xF0) != 0x50) continue; \
+ /* Bug link files show up as free block. */ \
+ if (!ptr[0xa]) continue; \
ptr+= 0xa; \
if (pfile[0] == 0) { \
- strncpy(dir->name, ptr, sizeof(dir->name)); \
- dir->name[sizeof(dir->name) - 1] = '\0'; \
+ strncpy(dir->name, ptr, sizeof(dir->name) - 1); \
+ if (size_of_name < sizeof(dir->name)) dir->name[size_of_name] = '\0'; \
} else for (i=0; i<20; i++) { \
if (pfile[i] == ptr[i]) { \
- dir->name[i] = ptr[i]; \
- if (ptr[i] == 0) break; else continue; } \
+ dir->name[i] = ptr[i]; continue; } \
if (pfile[i] == '?') { \
dir->name[i] = ptr[i]; continue; } \
if (pfile[i] == '*') { \
match = 0; break; \
} \
SysPrintf("%d : %s = %s + %s (match=%d)\n", nfile, dir->name, pfile, ptr, match); \
- if (match == 0) continue; \
+ if (match == 0) { continue; } \
dir->size = 8192; \
v0 = _dir; \
break; \
if (pa0) {
strcpy(ffile, pa0);
pfile = ffile+5;
- nfile = 1;
+ nfile = 0;
if (!strncmp(pa0, "bu00", 4)) {
+ // firstfile() calls _card_read() internally, so deliver it's event
+ DeliverEvent(0x11, 0x2);
bufile(1);
} else if (!strncmp(pa0, "bu10", 4)) {
+ // firstfile() calls _card_read() internally, so deliver it's event
+ DeliverEvent(0x11, 0x2);
bufile(2);
}
}
- // firstfile() calls _card_read() internally, so deliver it's event
- DeliverEvent(0x11, 0x2);
-
pc0 = ra;
}
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("psxBios_%s: %x,%x,%x\n", biosB0n[0x4e], a0, a1, a2);
#endif
-
+ /*
+ Function also accepts sector 400h (a bug).
+ But notaz said we shouldn't allow sector 400h because it can corrupt the emulator.
+ */
+ if (!(a1 <= 0x3FF))
+ {
+ /* Invalid sectors */
+ v0 = 0; pc0 = ra;
+ return;
+ }
card_active_chan = a0;
port = a0 >> 4;
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("psxBios_%s\n", biosB0n[0x4f]);
#endif
-
+ /*
+ Function also accepts sector 400h (a bug).
+ But notaz said we shouldn't allow sector 400h because it can corrupt the emulator.
+ */
+ if (!(a1 <= 0x3FF))
+ {
+ /* Invalid sectors */
+ v0 = 0; pc0 = ra;
+ return;
+ }
card_active_chan = a0;
port = a0 >> 4;
pc0 = ra;
}
+/* According to a user, this allows Final Fantasy Tactics to save/load properly */
+void psxBios__get_error(void) // 55
+{
+ v0 = 0;
+ pc0 = ra;
+}
+
void psxBios_Krom2RawAdd() { // 0x51
int i = 0;
pc0 = ra;
}
+void psxBios__card_status() { // 5c
+#ifdef PSXBIOS_LOG
+ PSXBIOS_LOG("psxBios_%s: %x\n", biosB0n[0x5c], a0);
+#endif
+
+ v0 = card_active_chan;
+ pc0 = ra;
+}
+
+void psxBios__card_wait() { // 5d
+#ifdef PSXBIOS_LOG
+ PSXBIOS_LOG("psxBios_%s: %x\n", biosB0n[0x5d], a0);
+#endif
+
+ v0 = 1;
+ pc0 = ra;
+}
+
/* System calls C0 */
/*
//biosA0[0x05] = psxBios_ioctl;
//biosA0[0x06] = psxBios_exit;
//biosA0[0x07] = psxBios_sys_a0_07;
- //biosA0[0x08] = psxBios_getc;
- //biosA0[0x09] = psxBios_putc;
- //biosA0[0x0a] = psxBios_todigit;
+ biosA0[0x08] = psxBios_getc;
+ biosA0[0x09] = psxBios_putc;
+ biosA0[0x0a] = psxBios_todigit;
//biosA0[0x0b] = psxBios_atof;
//biosA0[0x0c] = psxBios_strtoul;
//biosA0[0x0d] = psxBios_strtol;
//biosA0[0xa3] = psxBios_DequeueCdIntr;
//biosA0[0xa4] = psxBios_sys_a0_a4;
//biosA0[0xa5] = psxBios_ReadSector;
- //biosA0[0xa6] = psxBios_get_cd_status;
+ biosA0[0xa6] = psxBios_get_cd_status;
//biosA0[0xa7] = psxBios_bufs_cb_0;
//biosA0[0xa8] = psxBios_bufs_cb_1;
//biosA0[0xa9] = psxBios_bufs_cb_2;
//biosB0[0x52] = psxBios_sys_b0_52;
//biosB0[0x53] = psxBios_sys_b0_53;
//biosB0[0x54] = psxBios__get_errno;
- //biosB0[0x55] = psxBios__get_error;
+ biosB0[0x55] = psxBios__get_error;
biosB0[0x56] = psxBios_GetC0Table;
biosB0[0x57] = psxBios_GetB0Table;
biosB0[0x58] = psxBios__card_chan;
//biosB0[0x59] = psxBios_sys_b0_59;
//biosB0[0x5a] = psxBios_sys_b0_5a;
biosB0[0x5b] = psxBios_ChangeClearPad;
- //biosB0[0x5c] = psxBios__card_status;
- //biosB0[0x5d] = psxBios__card_wait;
+ biosB0[0x5c] = psxBios__card_status;
+ biosB0[0x5d] = psxBios__card_wait;
//*******************C0 CALLS****************************
//biosC0[0x00] = psxBios_InitRCnt;
//biosC0[0x01] = psxBios_InitException;
memset(Thread, 0, sizeof(Thread));
Thread[0].status = 2; // main thread
+ pad_stopped = 1;
jmp_int = NULL;
pad_buf = NULL;
pad_buf1 = NULL;
pad_buf1len = pad_buf2len = 0;
heap_addr = NULL;
heap_end = NULL;
+ heap_size = 0;
CardState = -1;
CurThread = 0;
memset(FDesc, 0, sizeof(FDesc));
+ card_active_chan = 0;
psxMu32ref(0x0150) = SWAPu32(0x160);
psxMu32ref(0x0154) = SWAPu32(0x320);
*/
// opcode HLE
psxRu32ref(0x0000) = SWAPu32((0x3b << 26) | 4);
- psxMu32ref(0x0000) = SWAPu32((0x3b << 26) | 0);
+ /* Whatever this does, it actually breaks CTR, even without the uninitiliazed memory patch.
+ Normally games shouldn't read from address 0 yet they do. See explanation below in details. */
+ //psxMu32ref(0x0000) = SWAPu32((0x3b << 26) | 0);
psxMu32ref(0x00a0) = SWAPu32((0x3b << 26) | 1);
psxMu32ref(0x00b0) = SWAPu32((0x3b << 26) | 2);
psxMu32ref(0x00c0) = SWAPu32((0x3b << 26) | 3);
psxHu32ref(0x1060) = SWAPu32(0x00000b88);
hleSoftCall = FALSE;
+
+ /* Some games like R-Types, CTR, Fade to Black read from adress 0x00000000 due to uninitialized pointers.
+ See Garbage Area at Address 00000000h in Nocash PSX Specfications for more information.
+ Here are some examples of games not working with this fix in place :
+ R-type won't get past the Irem logo if not implemented.
+ Crash Team Racing will softlock after the Sony logo.
+ */
+
+ psxMu32ref(0x0000) = SWAPu32(0x00000003);
+ /*
+ But overwritten by 00000003h after soon.
+ psxMu32ref(0x0000) = SWAPu32(0x00001A3C);
+ */
+ psxMu32ref(0x0004) = SWAPu32(0x800C5A27);
+ psxMu32ref(0x0008) = SWAPu32(0x08000403);
+ psxMu32ref(0x000C) = SWAPu32(0x00000000);
}
void psxBiosShutdown() {
if (NET_recvPadData(pad_buf2, 2) == -1)
netError();
} else {
- if (pad_buf1) {
- psxBios_PADpoll(1);
- }
+ if (!pad_stopped) {
+ if (pad_buf1) {
+ psxBios_PADpoll(1);
+ }
- if (pad_buf2) {
- psxBios_PADpoll(2);
+ if (pad_buf2) {
+ psxBios_PADpoll(2);
+ }
}
}
switch (psxRegs.CP0.n.Cause & 0x3c) {
case 0x00: // Interrupt
+ interrupt_r26=psxRegs.CP0.n.EPC;
#ifdef PSXCPU_LOG
// PSXCPU_LOG("interrupt\n");
#endif
#endif
switch (a0) {
case 1: // EnterCritical - disable irq's
- psxRegs.CP0.n.Status &= ~0x404;
-v0=1; // HDHOSHY experimental patch: Spongebob, Coldblood, fearEffect, Medievil2, Martian Gothic
+ /* Fixes Medievil 2 not loading up new game, Digimon World not booting up and possibly others */
+ v0 = (psxRegs.CP0.n.Status & 0x404) == 0x404;
+ psxRegs.CP0.n.Status &= ~0x404;
break;
case 2: // ExitCritical - enable irq's
psxRegs.CP0.n.Status |= 0x404;
break;
+ /* Normally this should cover SYS(00h, SYS(04h but they don't do anything relevant so... */
+ default:
+ break;
}
pc0 = psxRegs.CP0.n.EPC + 4;
bfreezel(&CurThread);
bfreezes(FDesc);
bfreezel(&card_active_chan);
+ bfreezel(&pad_stopped);
+ bfreezel(&heap_size);
}
notaz.gp2x.de / pcsx_rearmed.git / commitdiff