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changeset 190:4cb8a3891e26

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Small fix to bg drawing that yields the proper res for direct color DMA
author Mike Pavone <pavone@retrodev.com>
date Mon, 14 Jan 2013 02:13:14 -0800
parents 806c3b7a6f2a
children 1b4d856b067a
files vdp.c
diffstat 1 files changed, 4 insertions(+), 4 deletions(-) [+]
line wrap: on
line diff
--- a/vdp.c	Mon Jan 14 02:03:35 2013 -0800
+++ b/vdp.c	Mon Jan 14 02:13:14 2013 -0800
@@ -929,16 +929,16 @@
 		if (context->latched_mode & BIT_H40) {
 			linecyc /= 16;
 			if (linecyc >= 50 && linecyc < 210) {
-				uint32_t x = ((linecyc-50)&(~0x1))*2;
+				uint32_t x = (linecyc-50)*2;
 				start = context->framebuf + line * 320 + x;
-				end = start + 4;
+				end = start + 2;
 			}
 		} else {
 			linecyc /= 20;
 			if (linecyc >= 43 && linecyc < 171) {
-				uint32_t x = ((linecyc-48)&(~0x1))*2;
+				uint32_t x = (linecyc-43)*2;
 				start = context->framebuf + line * 256 + x;
-				end = start + 4;
+				end = start + 2;
 			}
 		}
 		uint16_t color = context->cram[context->regs[REG_BG_COLOR] & 0x3F];