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-rw-r--r--libpcsxcore/psxbios.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/libpcsxcore/psxbios.c b/libpcsxcore/psxbios.c
index 010a229..67a01e5 100644
--- a/libpcsxcore/psxbios.c
+++ b/libpcsxcore/psxbios.c
@@ -610,7 +610,13 @@ void psxBios_strlen() { // 0x1b
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);
@@ -626,7 +632,11 @@ void psxBios_rindex() { // 0x1d
char *p = (char *)Ra0;
v0 = 0;
-
+ if (a0 == 0)
+ {
+ pc0 = ra;
+ return;
+ }
do {
if (*p == a1)
v0 = a0 + (p - (char *)Ra0);