psxbios: don't limit pointers to ram

scratchpad is sometimes used

diff --git a/libpcsxcore/psxbios.c b/libpcsxcore/psxbios.c
index 432b0e2..11011d3 100644 (file)
--- a/libpcsxcore/psxbios.c
+++ b/libpcsxcore/psxbios.c
@@ -1479,13 +1479,15 @@ void psxBios_printf() { // 0x3f
 }
 
 static void psxBios_cd() { // 0x40
-       const char *p, *dir = castRam8ptr(a0);
+       const char *p, *dir = Ra0;
        PSXBIOS_LOG("psxBios_%s %x(%s)\n", biosB0n[0x40], a0, dir);
-       if ((p = strchr(dir, ':')))
-               dir = ++p;
-       if (*dir == '\\')
-               dir++;
-       snprintf(cdir, sizeof(cdir), "%s", dir);
+       if (dir != INVALID_PTR) {
+               if ((p = strchr(dir, ':')))
+                       dir = ++p;
+               if (*dir == '\\')
+                       dir++;
+               snprintf(cdir, sizeof(cdir), "%s", dir);
+       }
        mips_return_c(1, 100);
 }
 
@@ -2566,7 +2568,7 @@ void psxBios_puts() { // 3e/3f
 }
 
 static void bufile(const u8 *mcd_data, u32 dir_) {
-       struct DIRENTRY *dir = (struct DIRENTRY *)castRam8ptr(dir_);
+       struct DIRENTRY *dir = (struct DIRENTRY *)PSXM(dir_);
        const char *pfile = ffile + 5;
        const u8 *data = mcd_data;
        int i = 0, match = 0;
@@ -2574,6 +2576,9 @@ static void bufile(const u8 *mcd_data, u32 dir_) {
        u32 head = 0;
 
        v0 = 0;
+       if (dir == INVALID_PTR)
+               return;
+
        for (; nfile <= 15 && !match; nfile++) {
                const char *name;
 
@@ -2627,11 +2632,12 @@ static void bufile(const u8 *mcd_data, u32 dir_) {
  */
 
 static void psxBios_firstfile() { // 42
-       char *pa0 = castRam8ptr(a0);
+       char *pa0 = Ra0;
 
        PSXBIOS_LOG("psxBios_%s %s %x\n", biosB0n[0x42], pa0, a1);
        v0 = 0;
 
+       if (pa0 != INVALID_PTR)
        {
                snprintf(ffile, sizeof(ffile), "%s", pa0);
                if (ffile[5] == 0)