changeset 724:2174f92c5f9b

Fix bug in vdp_next_hint that was causing HINTs to fire repeatedly when they should not have fired at all based on an HINT interval that was larger than the number of active lines in the display
author Michael Pavone <pavone@retrodev.com>
date Fri, 22 May 2015 18:38:44 -0700
parents 7178d750efbd
children a92ca6f0ed83
files vdp.c
diffstat 1 files changed, 3 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/vdp.c	Thu May 21 18:37:41 2015 -0700
+++ b/vdp.c	Fri May 22 18:38:44 2015 -0700
@@ -2034,6 +2034,9 @@
 	uint32_t inactive_start = context->latched_mode & BIT_PAL ? PAL_INACTIVE_START : NTSC_INACTIVE_START;
 	uint32_t hint_line;
 	if (context->vcounter + context->hint_counter >= inactive_start) {
+		if (context->regs[REG_HINT] > inactive_start) {
+			return 0xFFFFFFFF;
+		}
 		hint_line = context->regs[REG_HINT];
 	} else {
 		hint_line = context->vcounter + context->hint_counter + 1;