basement boomerang 
 
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Basement Boomerang 
Boomerang crazy kangaroo  
Technical Stuff 
 
 
Cabinet running defender 
 
 
 
 
 
 
 
 
 
 
Screen - Back Street Soccer 
 
 
 
 
Geometry 
 
Processor AMD Athlon XP2600+ 
Motherboard ASROCK K7VM4 integrated sound and network adapter 
Hard Disk 120GB 133/7200 
SONY 52xCDRW 
RAM 256MB DDR 
Graphics Ultimarc ArcadeVGA 
 
AMI BIOS 
Modifications to BIOS (press <f2>)  
 
Restore on AC/power loss > Power On      [makes PC boot up when switched on at mains] 
PS2 keyboard power on > Any Key           [if computer turned off any button will force a reboot] 
 
OS Windows XP 
 
Television Geometry 
 
Philips 21" TV 21PT1557 
The ArcadeVGA card produced too large a picture for the screen resulting in clipping of the edges. Geometry settings were adjusted by accessing SERVICE MODE by pressing 062596 and then the {i+} button on the remote resetting the input to AV1 and adjusting the geometry settings as follows: 
     
Horizontal
Setting
Description
HP
34
 
HB
31
 
HSH
27
Horizontal shift - centres picture
Vertical
 
 
VSL
41
Adjusts bottom border
VAM
7
Vertical Amplitude? adjusts size
VSC
26
Expands middle or top and bottom
VSH
15
Vertical Shift
SBL
OFF
 
H60
9
 
V60
-2
 
These settings may well vary between television sets. Also entering the service mode may overide some of the TV's safety features, therefore meddle at your own risk. 
 
VGA to SCART  
 
The Philips television has an RGB-capable  SCART socket and provided an Ultimarc ArcadeVGA card is used can be wired by soldering the VGA breakout cable to a SCART plug. As this was my first attempt at soldering the old guy in the shop gave me sage advice, which was to clean the contacts with methylated spirit (denatured alcohol) and ensure the soldering iron heat is provided to both contacts as well as the solder. The wiring was connected as follows (see diagram below - SCART pin numbers in table below refer to pin numbers in diagram in parenthesis):- 
 
VGA
SCART PIN
SCART Description
RED
15
RED
GREEN
11
GREEN
BLUE
7
BLUE
RGB GROUND
13 or (9 or 5)
GROUND
HSYNC & VSYNC
16 & 20
COMPOSITE SYNC & 1-3V BLANKING ( RGB CONTROL) SIGNAL
12V yellow computer power supply lead
8
Function select (12V 4:3 AV mode)
 
 
 
I apologise to the owner for copying this image however I could not contact him as the site appears to be permanently down. www.jayma.org/mamescart/(dead link) 
  
 
 
 
                    
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