diff options
Diffstat (limited to 'libpcsxcore')
| -rw-r--r-- | libpcsxcore/mdec.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/libpcsxcore/mdec.c b/libpcsxcore/mdec.c index 2ad12585..fb5bff61 100644 --- a/libpcsxcore/mdec.c +++ b/libpcsxcore/mdec.c @@ -529,16 +529,16 @@ void psxDma1(u32 adr, u32 bcr, u32 chcr) { image = (u16 *)PSXM(adr); if (mdec.reg0 & MDEC0_RGB24) { // 15-b decoding - // MDECOUTDMA_INT(((size * (1000000 / 9000)) / 4) /** 4*/); - MDECOUTDMA_INT(size / 4); size = size / ((16 * 16) / 2); for (; size > 0; size--, image += (16 * 16)) { mdec.rl = rl2blk(blk, mdec.rl); yuv2rgb15(blk, image); } - } else { // 24-b decoding - // MDECOUTDMA_INT(((size * (1000000 / 9000)) / 4) /** 4*/); - MDECOUTDMA_INT(size / 4); + } else { // 24-b decoding
+ // Fear Effect 2 Artwork (4000+ = BIAS 1)
+ // Breaks: Lemmings
+ //MDECOUTDMA_INT( ((size / 4) / BIAS) * 4000);
+
size = size / ((24 * 16) / 2); for (; size > 0; size--, image += (24 * 16)) { mdec.rl = rl2blk(blk, mdec.rl); @@ -546,6 +546,23 @@ void psxDma1(u32 adr, u32 bcr, u32 chcr) { } } + /*
+ Absolute minimum DMA time:
+
+ # bytes written to memory *
+ average cycles to create byte /
+ 32-bit DMA per cycle
+
+
+ Note that FF9 Dali accepts 1-75~150
+ before slowdown occurs. No crash.
+ */
+
+ dmacnt = (image - (u16 *)PSXM(adr)) * 1;
+
+ MDECOUTDMA_INT( dmacnt / 4);
+
+
mdec.reg1 |= MDEC1_BUSY; } |