# HG changeset patch
# User Mike Pavone <pavone@retrodev.com>
# Date 1356735780 28800
# Node ID 1a551a85cb06e3dc4bac8cc42f16fa777415339e
# Parent  9705075fcf36ff196bbe6ddd1f7e6391f624cad7
Fix horizontal mask values for scroll plane map address calculation

diff -r 9705075fcf36 -r 1a551a85cb06 vdp.c
--- a/vdp.c	Fri Dec 28 14:30:25 2012 -0800
+++ b/vdp.c	Fri Dec 28 15:03:00 2012 -0800
@@ -411,7 +411,7 @@
 	switch(context->regs[REG_SCROLL] & 0x3)
 	{
 	case 0:
-		hscroll_mask = 0xF0;
+		hscroll_mask = 0x1F;
 		v_mul = 64;
 		break;
 	case 0x1:
@@ -424,7 +424,7 @@
 		v_mul = 0;
 		break;
 	case 0x3:
-		hscroll_mask = 0x3F0;
+		hscroll_mask = 0x7F;
 		v_mul = 256;
 		break;
 	}