PowerCard 100 on a clock chipped LC575 logic board? -- Welcome to the Colo(u)r Classic Forum

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Date Posted: 20:05:49 08/06/01 Mon
Author: Jeffrey G
Subject: PowerCard 100 on a clock chipped LC575 logic board?

Hi CC fans. I spotted a discussion on here about using a PowerCard 100 on a clock chipped LC575 logic board. I hadn't realised that the PowerCard, would inherit the clock speed from the upgraded logic board, so I thought i'd try it - a few extra mhz for free!

I already have another CC which I've hotted up to 80mhz using this method (http://gabezing.sytes.net/LC575-40Mhz-E.html) and I already had the parts, so it was no big deal to do it to this one.

I initially I ran it with a 21mhz occillator, which had it burning along at 125mhz - great. Natually, this proved to be too fast, and it soon froze. I've currently got it using a 19mhz chip yeilding 115mhz, which *seems* stable so far.

Does anyone else have experience of running one of these at higher speeds, and if you do, what do you think is a sensible speed to stay at? I saw Misuthiku's post suggesting that "110/3/2=18.33333" But Output Enablers don't seem to stock an OSC at that speed!

I'm worried that I might be pushing it a litle too far. Or otherwise, if it isn't dangerous to run it at 125mhz, is there any way I could try to keep the temperature down to run at that speed? It was nice zipping along that fast!

Any info or opinions would be great.

Jeffrey G

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Replies:

Re: PowerCard 100 on a clock chipped LC575 logic board? -- Stuart Bell, 00:10:56 08/07/01 Tue
Re: PowerCard 100 on a clock chipped LC575 logic board? -- Chris Lawson, 05:05:49 08/07/01 Tue
- Re: PowerCard 100 on a clock chipped LC575 logic board? -- Jeffrey G, 16:41:45 08/07/01 Tue
  - Re: PowerCard 100 on a clock chipped LC575 logic board? -- Chris Lawson, 18:07:24 08/07/01 Tue
    - Re: PowerCard 100 on a clock chipped LC575 logic board? -- Dr. Webster, 20:07:00 08/07/01 Tue
    - Re: PowerCard 100 on a clock chipped LC575 logic board? -- Bruce (in Orlando), 12:00:36 08/08/01 Wed
      - Re: PowerCard 100 on a clock chipped LC575 logic board? -- Chris Lawson, 13:09:58 08/08/01 Wed
      - Re: PowerCard 100 on a clock chipped LC575 logic board? -- Chris Lawson, 13:23:44 08/08/01 Wed
      - Re: PowerCard 100 on a clock chipped LC575 logic board? -- Jeffrey G, 00:27:00 08/09/01 Thu
        Clocked CC/575s -- Stuart Bell, 00:36:03 08/09/01 Thu
        Re: Clocked CC/575s -- Chris Lawson, 04:53:42 08/09/01 Thu
        Re: Clocked CC/575s -- Jeffrey G, 05:40:32 08/09/01 Thu