From fc4803bdc2c9840a007c60e422fb0531107b80f2 Mon Sep 17 00:00:00 2001
From: notaz
Date: Thu, 5 Feb 2015 02:36:58 +0200
Subject: dma: some timing hacks

untested
---
 libpcsxcore/mdec.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

(limited to 'libpcsxcore/mdec.c')

diff --git a/libpcsxcore/mdec.c b/libpcsxcore/mdec.c
index bed4e53..d6c7ab6 100644
--- a/libpcsxcore/mdec.c
+++ b/libpcsxcore/mdec.c
@@ -32,7 +32,7 @@
  * 320x240x16@60Hz => 9.216 MB/s
  * so 2.0 to 4.0 should be fine.
  */
-#define MDEC_BIAS 2.0f
+#define MDEC_BIAS 2
 
 #define DSIZE			8
 #define DSIZE2			(DSIZE * DSIZE)
@@ -545,15 +545,13 @@ void psxDma1(u32 adr, u32 bcr, u32 chcr) {
 	int blk[DSIZE2 * 6];
 	u8 * image;
 	int size;
-	int dmacnt;
+	u32 words;
 
 	if (chcr != 0x01000200) return;
 
-	size = (bcr >> 16) * (bcr & 0xffff);
+	words = (bcr >> 16) * (bcr & 0xffff);
 	/* size in byte */
-	size *= 4;
-	/* I guess the memory speed is limitating */
-	dmacnt = size;
+	size = words * 4;
 
 	if (!(mdec.reg1 & MDEC1_BUSY)) {
 		/* add to pending */
@@ -625,7 +623,7 @@ void psxDma1(u32 adr, u32 bcr, u32 chcr) {
 	}
 	
 	/* define the power of mdec */
-	MDECOUTDMA_INT((int) ((dmacnt* MDEC_BIAS)));
+	MDECOUTDMA_INT(words * MDEC_BIAS);
 	}
 }
 
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