EPROM Adapter 2764/27512

15/06/2021,

With this PCB it is possible to eliminate the use of old 2708 and 2716 EPROM from 1G CPU board.

A few simple steps:

1. Set correct jumper configuration for 2716 IC1 EPROM
2. Place this PCB on IC1 socket
3. Connect 3 wire from IC11 (pin 11-12-13) of main CPU.
4. ONLY in case of 27512 EPROM, you can have more games (8 max) selectable by dip-switch. So you can compose it as you like. It’s very simple: copy command under Windows or cat under Linux.
5. Set dip-switch with your game.
6. PLAY!

Using cat command from Linux terminal:

cat eprom.IC1 eprom.IC2 [...] > eprom.IC

For those who use Windows, from command shell do this command:

copy /B eprom.IC1 + eprom.IC2 + [...]  eprom.IC

Below an example with table:

cat hot.bin fire_mountain.bin locomotion.bin str.bin hot_free.bin stargod.bin space_shuttle.bin hod.bin > rom_pack.bin

ROM (Example)	A15	A14	A13
Hot Wheels	0	0	0
Fire Mountain	0	0	1
Locomotion	0	1	0
Shooting the Rapid	0	1	1
Hot Wheels Free Play	1	0	0
Star God	1	0	1
Space Shuttle	1	1	0
House of Diamonds	1	1	1

>> ATTENTION: If a 2764 is used, the dip-switch remain fixed A15 OFF, A14 OFF, A13 ON <<

Assembly & board information:

• Schematic Revision 1
• Interactive BOM

ROM Download (fitted to 8k):

• Hot Wheels original – free play
• Fire Mountain original – free play
• Locomotion original – free play
• Shooting the Rapid original – free play
• Star god original (1B1125) (1B1144) – free play (1B1125) (1B1144)
• Space Shuttle original – free play
• House of Diamonds original – free play
• Future World original – free play
• Earth Wind Fire original (1B1146) (1B1144) – free play (1B1146) (1B1144)
• Winter Sport original – free play

NOTE: HORROR Pinball (by Pinball Shop) it’s based on Space shuttle ROM, so it is the same!

All original ROMS are downloaded from www.zaccaria-pinball.com