PLAster™ V2 (PLA replacement for C64 U17)

(1 customer review)

Original price was: $22.00.Current price is: $19.00. USD

The U17 PLA is the most common chip failure in earlier Commodore 64 revisions and can result in a black screen.

Also available as open source here:

Out of stock

SKU: PLA Category:


Replace your PLA with PLAster™ for Commodore 64 U17:

  • Acts as fully compatible replacement for the U17 PLA chip in most breadbin/longboard revisions including a few very early C64C models;
  • Fully compatible with Super Zaxxon and Epyx Fastload cartridges
  • Works in revisions 326298 (original), 250407 (A), 250425 (B), and 250466 (B3);
  • Not compatible with short boards, i.e. 250469, since those have a 64-pin mega-PLA;
  • Configurable CASRAM delay of 25 or 30ns with DIP switch;
  • When C64 version is used in conjunction with BackBit cartridge, allows for software controlled KERNAL replacement (with DIP switch setting);
  • “Eyes” switch quiets bus to assist with troubleshooting.

Additional information

Weight 2 oz
Dimensions 1 × 1 × 1 in

1 review for PLAster™ V2 (PLA replacement for C64 U17)

  1. eightbit

    Excellent and easy PLA replacement. I purchased one of these “just in case” around 2 years ago I think. Well, that just in case moment finally arrived. My PLA finally failed partially and carts would not detect in the C64. I removed the failing original PLA and popped this one in. I did have to flip the switch for the CASRAM as the basic screen was all jumbled, but after that it worked like a champ. Cart games work again, all diagnostic tests pass, and the machine is running again. GREAT PLA replacement!

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