# HG changeset patch
# User Michael Pavone <pavone@retrodev.com>
# Date 1483403113 28800
# Node ID 25268334a24ca78a53ff631ad8c0b73ab249c78c
# Parent  9e0f2ea4a0fc2857620e610904bf2cdd59bf2135
Fix Mode 4 sprite table Y scan to account for VRAM byte swapping

diff -r 9e0f2ea4a0fc -r 25268334a24c vdp.c
--- a/vdp.c	Sun Jan 01 23:00:28 2017 -0800
+++ b/vdp.c	Mon Jan 02 16:25:13 2017 -0800
@@ -470,7 +470,7 @@
 		line &= 0xFF;
 		
 		uint32_t sat_address = mode4_address_map[(context->regs[REG_SAT] << 7 & 0x3F00) + context->sprite_index];
-		uint32_t y = context->vdpmem[sat_address];
+		uint32_t y = context->vdpmem[sat_address+1];
 		uint32_t size = (context->regs[REG_MODE_2] & BIT_SPRITE_SZ) ? 16 : 8;
 		
 		if (y >= 0xd0) {
@@ -491,7 +491,7 @@
 		}
 		
 		if (context->sprite_index < MAX_SPRITES_FRAME_H32) {
-			y = context->vdpmem[sat_address+1];
+			y = context->vdpmem[sat_address];
 			if (y >= 0xd0) {
 				context->sprite_index = MAX_SPRITES_FRAME_H32;
 				return;