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34777Re: [midatlanticretro] S100 Floppy Controller

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  • Dave McGuire
    Mar 17, 2014
      On 03/17/2014 04:16 PM, B Degnan wrote:
      > >> A while back I posted about an IMSAI 8080 system I acquired and my
      > >> efforts to get it back into working order. The system contains a
      > >> floppy controller that I have not been able to identify
      > >
      > > Interesting! Ohio Scientific took the same approach with their floppy
      > > system, using a UART to encode/decode the datastream. In their case
      > > it was a Motorola 6850.
      > Heath did the same with the H-17 floppy subsystem for the H-8. I've
      > always thought it was a bit, erm, "lowbrow", but it works.
      >> What controller "brow" was IBM using when they originally introduced
      > the "floppy disk" drive with S/370? Curious ...
      > I think it's easy to apply today's perspective and knowledge to
      > yesterday's problems. It's an evolution more so than skill/brow don't
      > you think?

      It definitely is, but when the H-17 was developed, there were several
      floppy controller ICs available. They were just expensive. ;) Most
      other companies (as you know) used 'em.


      Dave McGuire, AK4HZ
      New Kensington, PA
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