From 225729b79c6f6c1529c78e63a2863c2b2e5d0e49 Mon Sep 17 00:00:00 2001
From: Jeffrey Pfau <jeffrey@endrift.com>
Date: Sun, 21 Apr 2013 14:43:28 -0700
Subject: [PATCH] Implement BGxHOFS/BGxVOFS

---
 src/gba/renderers/video-software.c | 32 ++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/src/gba/renderers/video-software.c b/src/gba/renderers/video-software.c
index 0372e3101..9f9937fe8 100644
--- a/src/gba/renderers/video-software.c
+++ b/src/gba/renderers/video-software.c
@@ -88,6 +88,38 @@ static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRender
 		value &= 0xFFCF;
 		GBAVideoSoftwareRendererWriteBGCNT(&softwareRenderer->bg[3], value);
 		break;
+	case REG_BG0HOFS:
+		value &= 0x01FF;
+		softwareRenderer->bg[0].x = value;
+		break;
+	case REG_BG0VOFS:
+		value &= 0x01FF;
+		softwareRenderer->bg[0].y = value;
+		break;
+	case REG_BG1HOFS:
+		value &= 0x01FF;
+		softwareRenderer->bg[1].x = value;
+		break;
+	case REG_BG1VOFS:
+		value &= 0x01FF;
+		softwareRenderer->bg[1].y = value;
+		break;
+	case REG_BG2HOFS:
+		value &= 0x01FF;
+		softwareRenderer->bg[2].x = value;
+		break;
+	case REG_BG2VOFS:
+		value &= 0x01FF;
+		softwareRenderer->bg[2].y = value;
+		break;
+	case REG_BG3HOFS:
+		value &= 0x01FF;
+		softwareRenderer->bg[3].x = value;
+		break;
+	case REG_BG3VOFS:
+		value &= 0x01FF;
+		softwareRenderer->bg[3].y = value;
+		break;
 	default:
 		GBALog(GBA_LOG_STUB, "Stub video register write: %03x", address);
 	}