Commodore 64

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A community for those who love the Commodore 64, the best selling personal computer of all time. Fans of the original, collectors, modders, programmers, and clone builders are welcome. Did you just buy a cool old machine? Show us. Are you building something cool? Tell us about it. Do you need help with a program? Ask.

Vic20s, PETs, CBMs, and other Commodore machines are also welcome.

RULES:

  1. All Lemmy.ca rules apply here.

  2. Everyone (see rule 98) is welcome.

  3. If you’ve seen a question 100 times answer it the 101st time or ignore it. Even better, write a complete, detailed answer and suggest that the mod(s) pin it to the community.

[Did you actually think there were 98 rules?]

  1. If you present something as fact and are asked to provide proof or a source provide proof or a source. Proof must be from a reliable source. If you fail to provide proof or a source your post or comment may be removed.

  2. Don’t be a dick. Yes, this is a catch-all rule.

  3. The mod(s) have the final say.

founded 1 year ago
MODERATORS
MapleEngineer@lemmy.ca
listing: all - local
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Kernel ROM Switching 27256 to 2332/64 Adapters with Sexy Boy Racer Downlighting (lemmy.ca)
submitted 1 year ago by MapleEngineer@lemmy.ca to c/commodore_64@lemmy.ca
0 comments fedilink
 
 

I was building a ROM switching adapter so that I could use modern 27256 ROMs in the 2332 and 2364 footprints on the Commodore 64. I decided to add an LED and resistor to the bottom for mood lighting. When I started adding LEDs of different colors it turned pretty sexy pretty fast.

The latest iteration of this adapted has the microcontroller right on the adapter under the 27256. It handles switching the address lines, choosing between 2332 and 2364, and runs the RESET and EXROM lines. I have a pin left that I could use to run a WS2812 programmable RGB LED.

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My SixtyClone 250466 motherboard. (lemmy.ca)
submitted 1 year ago* (last edited 1 year ago) by MapleEngineer@lemmy.ca to c/commodore_64@lemmy.ca
0 comments fedilink
 
 

The CIAs, 6510, and VIC are original. In this photo I have original BASIC, Kernel, and Character ROMs in stalled for testing but I normally use 25256 to 23xx adapters to use modern ROM chips with this motherboard. I bought the parts kit from Retro8BITshop and soldered it myself.