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  • JonB's Avatar
    June 19th, 2018, 10:36 PM
    JonB replied to a thread Osborne 1 Repair in CP/M and MP/M
    @Witchy: I did the same as you, testing DRAM on a ZX Spectrum. One of the DRAMs I tested blew the Spectrum up! I think it damaged the power supply...
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    9 replies | 616 view(s)
  • JonB's Avatar
    June 19th, 2018, 04:54 AM
    JonB replied to a thread Building the Multicomp CP/M FPGA Computer in CP/M and MP/M
    Nice one, alank2! Although you do get 16x8mb drives as standard IIRC, which should be enough for most people, but it would be nice to mount...
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    24 replies | 4996 view(s)
  • JonB's Avatar
    June 16th, 2018, 11:38 AM
    JonB replied to a thread I finally ported CP/M! in CP/M and MP/M
    Well, you can see the data on a CD-ROM - just not at enough detail to read it! :D
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    44 replies | 1388 view(s)
  • JonB's Avatar
    June 13th, 2018, 10:45 PM
    JonB replied to a thread I finally ported CP/M! in CP/M and MP/M
    On the subject of vi for CP/M, I ported Stevie to it and it works, but is extremely slow. Stevie is a vi clone that was written for the Atari ST....
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    44 replies | 1388 view(s)
  • JonB's Avatar
    June 11th, 2018, 11:47 PM
    JonB replied to a thread FD501 Capacitor in Tandy/Radio Shack
    Nice one Ray, maybe there is nothing wrong with it...
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    8 replies | 349 view(s)
  • JonB's Avatar
    June 11th, 2018, 11:43 PM
    JonB replied to a thread I finally ported CP/M! in CP/M and MP/M
    Well done, Len, that's a real achievement. I recall how difficult it was writing CP/M IDE drivers, due to me being a novice, and the sense of...
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    44 replies | 1388 view(s)
  • JonB's Avatar
    June 11th, 2018, 04:05 AM
    JonB replied to a thread FD501 Capacitor in Tandy/Radio Shack
    Not an expert but that looks like a failed cap. Like you I have not seen one like that. I'd replace it. If there is no value on the downward...
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    8 replies | 349 view(s)
  • JonB's Avatar
    June 10th, 2018, 08:15 AM
    JonB replied to a thread HRS 80 Model 2 Boot error in Tandy/Radio Shack
    OK. First off, I removed the jumper leads from the drive. You can see them on the board, they're made out of wire wrap cable. There is a header on...
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    23 replies | 651 view(s)
  • JonB's Avatar
    June 9th, 2018, 12:46 AM
    JonB replied to a thread HRS 80 Model 2 Boot error in Tandy/Radio Shack
    Sorry, bit late to this party! @TheCorflot I have used these pads and they are good, if a little expensive. This video explains it:...
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    23 replies | 651 view(s)
  • JonB's Avatar
    June 8th, 2018, 01:27 AM
    JonB replied to a thread Vintage 70's Sound Design Speakers in General Off Topic
    Nice retro speakers! Do they sound any good? Got some Country & Western on that sweet little 8-track? (Sorry, cant see one of these without...
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    4 replies | 188 view(s)
  • JonB's Avatar
    May 23rd, 2018, 10:50 PM
    JonB replied to a thread Best approach on plastics restoration. in Vintage Computer Hardware
    About the plastic screw mounts. What I do on reassembly is turn the screw counter clockwise while bearing down a little on the screwdriver. When the...
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    27 replies | 868 view(s)
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