PLAster v2, PLA Replacement For MOS 906114-01 and MOS 251064-01 U17, Commodore 64
Available Now and made by: ToTsRETRO
PLAsterv2, IS a Modern PLA Replacement For C64
For Use with Commodore 64
ASSY 326298
ASSY 250407
ASSY 250425
ASSY 250466
C64 Reloaded MK1
KU-14194HB
SX-64
What is PLAster v2?
PLAster v2is a modernenergy efficient,plug-and-play replacementfor theMOS 906114-01andMOS 251064-01 PLA (Programmable Logic Array) chipused in the Commodore C64.
How do I use the new PLAster v2
Simply remove the original PLA in position U17 and insert yourNEW PLAster v2into the socket — no additional modifications required.
What is PLAster v2?
PLAster v2 is a GitHub Open Source Project created by BackBit, that is openly available to everyone.
What makes the PLAster v2 Awesome?
Modern chip design allows for Low Energy Consumption and low heat
Uses Exact Equations used in original MOS 906114-01
CAS delay: Improves compatibility on some systems
KERNAL Mode: Switch allows BackBit cartridge (and maybe others) to replace KERNAL ROM
PRIVATE EYES Mode: Switch sets bus high to facilitate in-circuit testing.
When Do I Replace My PLA?
The Original Commodore 64 PLA, the chip located in U17 has long been plagued for failures caused by the excessive heat it produces during use.If your commodore 64 model is experiencing the common issues of a failed or failing PLA listed below, it may be time to upgrade your PLA. Issues can present as....
Blank or Black,violet, pink or orange Screen on startup
Flashing or “Rainbow” Screen
Garbled Screen and Character Flaws
Overheating/Temperature Spikes
Thermal Crash
Partial Failures
Cartridges failing to load
Incorrect Memory Count/Out of Memory
(if you need ram, I carry that as well in the linkbelow)
Replacing your PLA may not always fix your problems as RAM, VIC-II chip and Kernal ROM can produce overlapping faults and failures.
If you have a functioning original PLA, try placing Heat Sinks on them to protect then from excessive heat and potential damage.
Any Questions Please Do Not Hesitate to ask.
