X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=src%2Fdma.S;h=8cec2e390d1bdd9a77d21dbfbb3710a91c7cb549;hb=HEAD;hp=b3f9d869dc9023885bb4563e9bddf4d40734d09a;hpb=88989dba0a2f0b59d782d25e01227df04452e8d3;p=mdlife

diff --git a/src/dma.S b/src/dma.S
index b3f9d86..8cec2e3 100644
--- a/src/dma.S
+++ b/src/dma.S
@@ -3,6 +3,7 @@
 #include "hwregs.h"
 #include "vdp.inc"
 
+
 	| dma_systovram(vmem_addr, src, count)
 	.globl dma_systovram
 dma_systovram:
@@ -10,6 +11,7 @@ dma_systovram:
 
 	| set source address
 	move.l 8(%sp), %d0
+	lsr.l #1, %d0
 	move.l %d0, %d1
 	vdp_setreg_reg VDP_REG_DMASRCL, %d0
 	lsr.w #8, %d1
@@ -34,11 +36,10 @@ dma_systovram:
 	or.w #(VDP_VRAM_DMA & 0xf0), %d1
 	| last word needs to come from RAM, so we push it on the stack
 	move.w %d1, -(%sp)
-	move.w (%sp), VDP_CTL_PORT
-	add.l #2, %sp
+	move.w (%sp)+, VDP_CTL_PORT
 
 	| after DMA ends the cpu can continue, turn DMA off
 	vdp_setreg VDP_REG_MODE2, VDP_M2_INIT + VDP_M2_DISP
 	rts
-	
+
 | vi:ft=gas68k: