# HG changeset patch
# User Mike Pavone <pavone@retrodev.com>
# Date 1378832112 25200
# Node ID 5677c053edd662f6ad8f25aff794f0beec002c79
# Parent  6221f8f534fa4f56ba8b22f47040f5a4fcdb7ef2
Fix timing of backdrop rendering when the display is turned off

diff -r 6221f8f534fa -r 5677c053edd6 vdp.c
--- a/vdp.c	Tue Sep 10 00:30:39 2013 -0700
+++ b/vdp.c	Tue Sep 10 09:55:12 2013 -0700
@@ -1211,14 +1211,20 @@
 		line -= 1;
 		int starti = -1;
 		if (context->latched_mode & BIT_H40) {
-			if (slot >= 50 && slot < 210) {
-				uint32_t x = (slot-50)*2;
+			if (slot >= 55 && slot < 210) {
+				uint32_t x = (slot-55)*2;
 				starti = line * 320 + x;
+			} else if (slot < 5) {
+				uint32_t x = (slot + 155)*2;
+				starti = (line-1)*320 + x;
 			}
 		} else {
-			if (slot >= 43 && slot < 171) {
-				uint32_t x = (slot-43)*2;
+			if (slot >= 48 && slot < 171) {
+				uint32_t x = (slot-48)*2;
 				starti = line * 320 + x;
+			} else if (slot < 5) {
+				uint32_t x = (slot + 123)*2;
+				starti = (line-1)*320 + x;
 			}
 		}
 		if (starti >= 0) {