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Commodore C64 8K ROM Cartridge PCB

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Commodore C64 8K ROM Cartridge PCB

Availability: In stock

Commodore C64 8K ROM Cartridge PCB - Multi-buy discount on any combination cartridge cases & PCBs - Click for more details



Commodore C64 8K ROM Cartridge PCB

PCB now includes Gold Edge connector, preinstalled button, resistors and capacitor.

Fits standard Commodore Cartridge cases, as well as our own (see better) 'Stumpy Case'


What is it for?  Well I used them to make DeadTest carts. Ideal for Commodore Diagnostic ROM or things like the 1541 Diag


Need EPROMS? you'll find them here

Tynemouth Software Blog Detailed Installers Guide


Compatible chips:

2764 27C64 28C64

27128 27C128

27256 27C256 28C256*

27512 27C512

* Tie A14 high due to non-standard pinout, select ROM with A13 and A15

PCB Fits TFW8b stumpy C64 case as well as orginal Commodore Case

Multi-buy discount on any combination cartridge cases & PCBs - Click for more details

(Discounts automatically applied at checkout)


Customer Reviews 2 item(s)

Wonderful learning tool for C64 memory and the expansion port
I bought this as a pseudo challenge to better understand the C64 memory and cartridge relationship, and I did learn a few things.
- This is a 8k cartridge so you are limited to 8k
- Depending on the size of the EPROM you can put multiple 8k programs/games on the IC and use the jumpers to reconfigure the cartridge for their use
- The Tynemouth Software user guide link has been pulled down for some curious, perplexing, reason which I don't understand, but if you take the link and look for historical records you will find it; use WaybackMachine to find the link as of September 28, 2020, alternatively look for other similar guide to relate
- I used an ST M27C256B EPROM and put 4 8k bin programs on it. I found that there are some odd things with either the 256 IC, the Cartridge PCB layout, or one of the bin. I was able to use the jumpers to switch the PCB to use 3 of the 4 bins
- It seams that how you lay out the 8k bins on the EPROM is in reverse expected order; eg $0000-$2000 is considered ROM4 and not ROM1 (A13,A14,A15) jumpers are set.
- C64C responds to this IC whether A15 is set or not. By the guide from Tynemouth A15 should always be set for a 256 IC
- TFW8b also has a note regarding the 256 ICs for which is not clear, and presuming to be inaccurate; (to tie A14 high and select from A13 & A15); advising anyone to double check
- If you are looking for a 16k cartridge there are a few more circuits and traces needed for a new/different PCB for which I hope TFW8b issue.
- Consider adding pin headers, jumpers, and an IC socket to make an experimental board. Then after learning, get other PCBs and solder jumper points, solder IC to PCB, and put it in a nice case

All-in-All a wonderful adventure in learning, and a great tool for just that purpose Review by jpenner64 / (Posted on 06/12/2020)
C64 cartridge pcb, awesome easy way to make you're own C64 game cartridge.
Absoloutely brilliant, whrer are the reviews for these ?????
My first tiime making my own cartridge for the C64, and it worked first time, these pcb's are a must if you want to make yourself a game cartridge for your C64, not only that, if you also get the cases supplied by these guys that fit this pcb, you end up with a professional cartridge for your C64, highly recommend. Review by Mark / (Posted on 18/04/2020)

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