From: Toni Wilen <twilen@winuae.net>
Date: Mon, 6 Jul 2015 19:22:30 +0000 (+0300)
Subject: Fixed overlay/framebuffer offset. LSB_FIRST define was missing.
X-Git-Tag: 3200~146
X-Git-Url: https://git.unchartedbackwaters.co.uk/w/?a=commitdiff_plain;h=f8d9310e1179611a74e95aedd0ad00f4c275c4e4;p=francis%2Fwinuae.git

Fixed overlay/framebuffer offset. LSB_FIRST define was missing.
---

diff --git a/mame/a2410.cpp b/mame/a2410.cpp
index c0a82c75..a9cd84e5 100644
--- a/mame/a2410.cpp
+++ b/mame/a2410.cpp
@@ -694,6 +694,8 @@ void tms_hsync_handler(void)
 	if (a2410_vpos >= a2410_height || a2410_vpos >= picasso_vidinfo.height)
 		return;
 
+	int overlay_yoffset = a2410_vpos - a2410_vertical_start;
+
 	int coladdr = parms.coladdr;
 	int vramoffset = ((parms.rowaddr << 8) & 0x7ffff);
 	uae_u16 *vram = (uae_u16*)gfxmem_bank.baseaddr + vramoffset;
@@ -702,14 +704,15 @@ void tms_hsync_handler(void)
 	uae_u8 *overlay0 = program_ram + overlayoffset * OVERLAY_WIDTH / 4;
 	uae_u8 *overlay1 = overlay0 + 0x20000;
 
-	if (!fullrefresh && !a2410_modified[a2410_vpos]) {
+	if (!fullrefresh && (overlay_yoffset < 0 || !a2410_modified[overlay_yoffset])) {
 		if (!picasso_is_vram_dirty(gfxmem_bank.start + (vramoffset << 1), a2410_displaywidth)) {
 			if (!picasso_is_vram_dirty(gfxmem_bank.start + ((vramoffset + 0x200) << 1), a2410_displaywidth)) {
 				return;
 			}
 		}
 	}
-	a2410_modified[a2410_vpos] = false;
+	if (overlay_yoffset >= 0)
+		a2410_modified[overlay_yoffset] = false;
 
 	get_a2410_surface();
 	uae_u8 *dst = a2410_surface;
diff --git a/mame/mameglue.h b/mame/mameglue.h
index 6b9479ae..010c4fd6 100644
--- a/mame/mameglue.h
+++ b/mame/mameglue.h
@@ -3,6 +3,8 @@
 #include "sysconfig.h"
 #include "sysdeps.h"
 
+#define LSB_FIRST
+
 extern void write_log(const char *, ...);
 extern void activate_debugger(void);