Questions tagged [commodore]

Commodore Business Machines and their products. Use more specific tags like [commodore-64] or [amiga] instead if appropriate.

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What is this extra lead in my monitor cable?

I have a breadbox Commodore 64 with a Commodore 1702 monitor. My monitor has three RCA-style inputs on the back: Audio (White) Luma (Yellow) Chroma (Red) I purchased a cable which claims to be an ...
Woodrow Barlow's user avatar
58 votes
2 answers
12k views

Why did Commodore fill their power supplies with epoxy?

If you know anything about the Commodore 64 (and other Commodores, really) you know that Commodore really went the cheap route and produced some awful power supplies. The Commodore 128 PSU isn't ...
cbmeeks's user avatar
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124 votes
2 answers
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How did Commodore's anti-Microsoft Easter Egg work?

A couple years ago the Toronto PET Users Group published an article (The Great Commodore/Microsoft Easter Egg War, on p. 7) about a newly discovered anti-Microsoft Easter Egg that Commodore hid in the ...
Raymond68's user avatar
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16 votes
2 answers
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What is the difference between the Commodore 1701 and the 1702?

Among the monitors offered by Commodore were the 1701 and the 1702, which, to my recollection, looked pretty much identical. Were there any cosmetic, functional, or other differences between the two?
Raymond68's user avatar
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18 votes
6 answers
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Is there software that will run across multiple Commodore 8-bit machines without modification?

I noticed in some of the answers in this question that the Commodore 8-bit line apparently used a jump table at $03xx for entry into the kernel ("kernal" for the pedantic) routines. Figuring that the ...
bjb's user avatar
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12 votes
1 answer
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What is the proper way to test the PSU output for a Commodore 128D?

This question is directly related to comments on the more general question and answer here. The Commodore 128D and 128D-CR have an internal PSU that can be readily and safely disconnected from the ...
Brian H's user avatar
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51 votes
4 answers
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What precautions to take when powering on old computer for the first time in years

I have a Commodore 128D that hasn't been powered in about 15 years. I want to begin using it again. It has been stored in cool dry places like attached garages, in a cardboard box. I hope this ...
nexus_2006's user avatar
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9 votes
2 answers
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Is there a device that will take composite video from a vintage computer and filter it so it is green or amber like the old monochrome monitors?

I know some monitors have a mono/green switch, but I'd like to do this with my 1702. If one doesn't exist, I'll probably try and make one (somehow).
Brian Sturk's user avatar
51 votes
7 answers
12k views

Why does the Commodore C128 perform poorly when running CP/M?

I have seen several claims of poor performance of the C128 when running CP/M, and would like to better understand these claims, especially in comparison to other CP/M machines of the early to mid-...
Brian H's user avatar
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9 votes
1 answer
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Selling computers via dealers and the mass market

As discussed in Origin of dealer networks, the two main ways to sell computers are, and particularly were in the old days, Three digit price tag sold to individuals => mass market, department stores ...
rwallace's user avatar
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