From 9d0069240fbde7632096a4792d1acdcca9bb47df Mon Sep 17 00:00:00 2001
From: Michael Pavone <pavone@retrodev.com>
Date: Thu, 27 Apr 2017 09:32:21 -0700
Subject: Adjust how the invalid size is handled for the horizontal dimmension
 of a plane. Fixes some garbage on the spinning cube scene of Overdrive 2

---
 vdp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'vdp.c')

diff --git a/vdp.c b/vdp.c
index 428c3c5..8663d9e 100644
--- a/vdp.c
+++ b/vdp.c
@@ -1128,7 +1128,7 @@ static void read_map_scroll(uint16_t column, uint16_t vsram_off, uint32_t line,
 		break;
 	case 0x2:
 		//TODO: Verify this behavior
-		hscroll_mask = 0x5F;
+		hscroll_mask = 0x1F;
 		v_mul = 0;
 		break;
 	case 0x3:
-- 
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