Random Info
Here I'm listing all the little tidbits of info I've gathered over the years.

Chip info
EPROM size reference
Address to address pin map
Various EPROM pinouts
Various CPU pinouts
Z80 CPU speed ratings
Various RAM chip info
Identifying/reading unknown EPROMs

PCB info

When your R-Type has no sound...
When your Frogger has no sound...
Substitution parts for Defender PCB's
Fixing inputs on a 1942
Fixing misc. Ghosts & Goblins problems
Identifying unknown PCB's
Identifying unknown PCB's with an EPROM reader
Figuring out pinouts with a volt meter
a MCR II "sound board interface error" fix
MCR Reset circuit
Williams sound board jumper settings
Williams board sync invert jumper
How to swap Sega System 16 games
How to convert Joust 2 to Inferno
How to run Zookeeper without the coin processor
How to run Kram without the coin processor
How to run Electric Yo-Yo without the coin processor
How to run Space Dungeon without the coin processor
How to convert a Qix PCB to run Zookeeper

Power Supplies
If your Robotron/Joust/Sinistar, etc flash "1-3-1" on the LED
How to run MCR games from a switching power supply
How to run Qix, Zookeeper, etc off a switching power supply
How to run Qix, Zookeeper, etc off a PC AT power supply

Monitor info

How to adjust the color on a monitor.
Bad focus... is the tube shot?
Sync inversion
Combine H/V sync to composite properly
"Strengthen" a sync
JAMMA sync details
How to discharge a monitor
How to flip the image on a monitor
Missing one color on a monitor?
Invert colors for a Nintendo game
Convert a Samtron 5" CGA monitor to "JAMMA" example1 example2 example3
Hook up a PSOne 5" LCD monitor to your arcade games (short version)

Controls info

How to use an 8-way in place of a Hall Effect or Analog stick
A circuit to use a 49-way stick in place of a Hall Effect or Analog stick
Refurbish Atari Assault joysticks

Audio info

How to build a cheap audio amp
Replacements for the LA4460 audio amp
Safely convert stereo to mono

Misc. info

How to build your own SuperGun
How to clean a laserdisc
Order JAMMA connectors from Digikey
1up + 2up "shift" switch (usefull for multi-games)

Game Hacks
Crazy Climber
Discs of Tron
Tron
Make Trax

Return to main.

email me:
tim@arcadecollecting.com.