From: notaz <notasas@gmail.com>
Date: Fri, 1 Dec 2023 23:05:10 +0000 (+0200)
Subject: an alt hack for Judge Dredd
X-Git-Tag: r24~29
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=26665bc5cb481a2087beb78793b3bef1be7c1597;p=pcsx_rearmed.git

an alt hack for Judge Dredd
---

diff --git a/libpcsxcore/database.c b/libpcsxcore/database.c
index 6cce0737..b35658ba 100644
--- a/libpcsxcore/database.c
+++ b/libpcsxcore/database.c
@@ -51,6 +51,12 @@ static const char * const gpu_centering_hack_db[] =
 	"SLPM86009",
 };
 
+static const char * const dualshock_timing1024_hack_db[] =
+{
+	/* Judge Dredd - could also be poor cdrom+mdec+dma timing */
+	"SLUS00630", "SLES00755",
+};
+
 static const char * const dualshock_init_analog_hack_db[] =
 {
 	/* Formula 1 Championship Edition */
@@ -73,6 +79,7 @@ hack_db[] =
 	HACK_ENTRY(gpu_slow_list_walking, gpu_slow_llist_db),
 	HACK_ENTRY(gpu_busy, gpu_busy_hack_db),
 	HACK_ENTRY(gpu_centering, gpu_centering_hack_db),
+	HACK_ENTRY(gpu_timing1024, dualshock_timing1024_hack_db),
 	HACK_ENTRY(dualshock_init_analog, dualshock_init_analog_hack_db),
 };
 
@@ -97,8 +104,6 @@ cycle_multiplier_overrides[] =
 #endif
 	/* Discworld Noir - audio skips if CPU runs too fast */
 	{ 222, { "SLES01549", "SLES02063", "SLES02064" } },
-	/* Judge Dredd - could also be poor MDEC timing */
-	{ 128, { "SLUS00630", "SLES00755" } },
 	/* Digimon World */
 	{ 153, { "SLUS01032", "SLES02914" } },
 	/* Syphon Filter - reportedly hangs under unknown conditions */
diff --git a/libpcsxcore/psxcommon.h b/libpcsxcore/psxcommon.h
index 01b2a9aa..dce4f41e 100644
--- a/libpcsxcore/psxcommon.h
+++ b/libpcsxcore/psxcommon.h
@@ -153,6 +153,7 @@ typedef struct {
 		boolean gpu_busy;
 		boolean gpu_centering;
 		boolean dualshock_init_analog;
+		boolean gpu_timing1024;
 	} hacks;
 } PcsxConfig;
 
diff --git a/libpcsxcore/psxdma.c b/libpcsxcore/psxdma.c
index e3655b5e..a7c438e3 100644
--- a/libpcsxcore/psxdma.c
+++ b/libpcsxcore/psxdma.c
@@ -191,7 +191,7 @@ void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU
 			madr_next = 0xffffff;
 
 			do_walking = Config.GpuListWalking;
-			if (do_walking < 0)
+			if (do_walking < 0 || Config.hacks.gpu_timing1024)
 				do_walking = Config.hacks.gpu_slow_list_walking;
 			madr_next_p = do_walking ? &madr_next : NULL;
 
@@ -201,10 +201,10 @@ void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU
 
 			HW_DMA2_MADR = SWAPu32(madr_next);
 
-			// Tekken 3 = use 1.0 only (not 1.5x)
+			// a hack for Judge Dredd which is annoyingly sensitive to timing
+			if (Config.hacks.gpu_timing1024)
+				size = 1024;
 
-			// Einhander = parse linked list in pieces (todo)
-			// Rebel Assault 2 = parse linked list in pieces (todo)
 			psxRegs.gpuIdleAfter = psxRegs.cycle + size + 16;
 			set_event(PSXINT_GPUDMA, size);
 			return;