From: gameblabla <gameblabla@openmailbox.org>
Date: Wed, 17 Jul 2019 23:10:33 +0000 (+0200)
Subject: psxbios: Add checks to PAD_init
X-Git-Tag: r23~156^2~49
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a824e83d363ce167068e497a97b25f6d637807d6;p=pcsx_rearmed.git

psxbios: Add checks to PAD_init

Nocash documentation says that function fails if type is not 0x20000000
or 0x20000001. In case of failure, it should return 0.
If not, then it should return 2.

This fixes input in Digimon World.
---

diff --git a/libpcsxcore/psxbios.c b/libpcsxcore/psxbios.c
index 4624bf4d..42926c23 100644
--- a/libpcsxcore/psxbios.c
+++ b/libpcsxcore/psxbios.c
@@ -1613,10 +1613,17 @@ void psxBios_PAD_init() { // 15
 #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;
 }