diff --git a/src/mame/machine/seibucop/seibucop.cpp b/src/mame/machine/seibucop/seibucop.cpp
index b5defce18c3..2ae09fbd5b7 100644
--- a/src/mame/machine/seibucop/seibucop.cpp
+++ b/src/mame/machine/seibucop/seibucop.cpp
@@ -49,7 +49,25 @@
     - stage 4: has sprite stuck on bottom-left of screen;
     - palette dims too much on attract / continue screen.
       It's known that the DMA data arrangement gives same results on a real Legionnaire board, so shrug?
-
+	Seibu Cup Soccer
+	- Handles collision detection via the 130e/3bb0 macros
+	  130e version in this makes a sub instead of an add as last opcode, which in turn reflects with
+	  the distance (which we do know that is internally loaded somehow). 
+013F3C: 3D7C 130E 0100             move.w  #$130e, ($100,A6)	// angle macro
+013F42: 302E 01B4                  move.w  ($1b4,A6), D0    // take the angle
+013F46: 082E 000F 01B0             btst    #$f, ($1b0,A6)   // is status exception flag raised?
+013F4C: 6712                       beq     $13f60
+013F4E: 2228 0004                  move.l  ($4,A0), D1		
+013F52: B2A8 0044                  cmp.l   ($44,A0), D1		// compares Y value against the next object (yes, cop_regs[1] + 0x40 = cop_regs[0])
+013F56: 6708                       beq     $13f60			// if equal then check the distance
+013F58: 6E04                       bgt     $13f5e
+013F5A: 7040                       moveq   #$40, D0			// set angle direction left ...
+013F5C: 6002                       bra     $13f60
+013F5E: 70C0                       moveq   #-$40, D0		// ... or right
+013F60: 3D7C 3BB0 0100             move.w  #$3bb0, ($100,A6) // dist macro
+013F66: 1140 003D                  move.b  D0, ($3d,A0)		// move angle value to [0x3d]
+013F6A: 4E75                       rts
+	
     Tech notes (to move into own file with doxy mainpage):
     -----------
     [0x6fc] DMA mode bit scheme:
@@ -66,6 +84,8 @@
 	[0x10-0x13] Y offset (a.k.a. calculated sine)
 	[0x14-0x17] X offset (a.k.a. calculated cosine)
 	[0x37] angle direction
+	TOC
+	[0x11381c] ball object
 
 ***************************************************************************/
 
diff --git a/src/mame/machine/seibucop/seibucop_cmd.hxx b/src/mame/machine/seibucop/seibucop_cmd.hxx
index 73a81399a09..ac5dc0ee487 100644
--- a/src/mame/machine/seibucop/seibucop_cmd.hxx
+++ b/src/mame/machine/seibucop/seibucop_cmd.hxx
@@ -72,16 +72,20 @@ void raiden2cop_device::LEGACY_execute_130e_cupsoc(int offset, UINT16 data)
 {
 	int dy = m_host_space->read_dword(cop_regs[1] + 4) - m_host_space->read_dword(cop_regs[0] + 4);
 	int dx = m_host_space->read_dword(cop_regs[1] + 8) - m_host_space->read_dword(cop_regs[0] + 8);
-
+	
 	cop_status = 7;
+
 	if (!dx) {
 		cop_status |= 0x8000;
 		cop_angle = 0;
 	}
-	else {
+	else 
+	{
 		cop_angle = (int)(atan(double(dy) / double(dx)) * 128.0 / M_PI);
 		if (dx < 0)
 			cop_angle += 0x80;
+		
+		cop_angle &= 0xff;
 	}
 
 	m_LEGACY_r0 = dy;
@@ -90,7 +94,7 @@ void raiden2cop_device::LEGACY_execute_130e_cupsoc(int offset, UINT16 data)
 	//printf("%d %d %f %04x\n",dx,dy,atan(double(dy)/double(dx)) * 128 / M_PI,cop_angle);
 
 	if (data & 0x80)
-		m_host_space->write_word(cop_regs[0] + (0x34 ^ 2), cop_angle);
+		cop_write_byte(cop_regs[0] + (0x34), cop_angle);
 }
 
 /*