dma: some timing hacks

[pcsx_rearmed.git] / libpcsxcore / mdec.c

diff --git a/libpcsxcore/mdec.c b/libpcsxcore/mdec.c
index bed4e53..d6c7ab6 100644 (file)
--- 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.
  */
  * 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)
 
 #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 blk[DSIZE2 * 6];
        u8 * image;
        int size;

-       int dmacnt;
+       u32 words;

 
        if (chcr != 0x01000200) return;
 
 
        if (chcr != 0x01000200) return;
 

-       size = (bcr >> 16) * (bcr & 0xffff);
+       words = (bcr >> 16) * (bcr & 0xffff);

        /* size in byte */
        /* 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 */
 
        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 */
        }
        
        /* define the power of mdec */

-       MDECOUTDMA_INT((int) ((dmacnt* MDEC_BIAS)));
+       MDECOUTDMA_INT(words * MDEC_BIAS);

        }
 }
 
        }
 }