From d8ffc596449e107b5104aad7ab007c8aec9190a3 Mon Sep 17 00:00:00 2001
From: dinkc64 <12570148+dinkc64@users.noreply.github.com>
Date: Tue, 10 Oct 2017 03:19:01 +0000
Subject: [PATCH] toa_gp9001.cpp/GHOX: support multi-connected sprites for a
 fixed hiscore screen

---
 src/burn/drv/toaplan/toa_gp9001.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/burn/drv/toaplan/toa_gp9001.cpp b/src/burn/drv/toaplan/toa_gp9001.cpp
index 9748e5579..4b391acce 100644
--- a/src/burn/drv/toaplan/toa_gp9001.cpp
+++ b/src/burn/drv/toaplan/toa_gp9001.cpp
@@ -96,6 +96,8 @@ static void RenderSpriteQueue(INT32 i, INT32 nPriority)
 	UINT32 nSpriteNumber;
 	INT32 x, y, xoff, yoff;
 	INT32 nFlip;
+	INT32 nMultiConnectorX = GP9001Reg[i][6] & 0x1ff;
+	INT32 nMultiConnectorY = GP9001Reg[i][7] & 0x1ff;
 
 	UINT8*** pMySpriteQueue = &pSpriteQueue[i << 4];
 
@@ -118,6 +120,14 @@ static void RenderSpriteQueue(INT32 i, INT32 nPriority)
 		nSpriteYPos = ((pSpriteInfo[7] << 1) | (pSpriteInfo[6] >> 7)) + GP9001Reg[i][7] + nSpriteYOffset;
 		nSpriteYPos &= 0x01FF;
 
+		if (pSpriteInfo[1] & 0x40) { // Multi-Connected sprite mode.
+			nSpriteXPos = (nMultiConnectorX + (((pSpriteInfo[5] << 1) | (pSpriteInfo[4] >> 7)))) & 0x1ff;
+			nSpriteYPos = (nMultiConnectorY + (((pSpriteInfo[7] << 1) | (pSpriteInfo[6] >> 7)))) & 0x1ff;
+		}
+
+		nMultiConnectorX = nSpriteXPos;
+		nMultiConnectorY = nSpriteYPos;
+
 		if (nFlip & 2) {
 			xoff = -8;
 			nSpriteXPos -= 7;