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From: monty@sagpd1
Newsgroups: comp.sys.amiga.hardware
Subject: Re: HARDWARE HACK: 2630 accellerator card in a Zorro II slot
Message-ID: <1991May21.193133.7531@sagpd1>
Date: 21 May 91 19:31:33 GMT
References: <72302@microsoft.UUCP> <21607@cbmvax.commodore.com> <1991May16.063945.7032@Informatik.TU-Muenchen.DE> <21643@cbmvax.commodore.com> <1991May21.161508.7078@sagpd1>
Reply-To: monty@sagpd1.UUCP (Monty Saine)
Organization: Scientific Atlanta, Government Products Div, San Diego, CA
Lines: 33

In article <1991May21.161508.7078@sagpd1> monty@sagpd1.UUCP (Monty Saine) writes:
>In article <21643@cbmvax.commodore.com> daveh@cbmvax.commodore.com (Dave Haynie) writes:
>>A1000 or A500.  While these machines don't have the coprocessor interface, that
>>isn't an issue unless there's other DMA around.  So the CBR/CBG lines can go
>>directly to the BR/BG lines of the 86 pin edge (they naturally correspond,
>>anyway).  There is no /BOSS line on the 86 pin edge, but there is /BGACK, which
>>again, in the absense of any other 68000 style DMA, can be used.  This requires

    Dave,
    Does this mean a DMA device not on the accelertor, or no DMA at all? I guess
    what I am asking is how the new GVP all in one '030/SCSI/RAM board would
    adapt to this scheme. Is it possible with out major hacking? So far all I've
    seen in this hack is some connectors and a minor bit of wiring. This type of
    board would eliminate needing the expansion chassis in most cases. It might
    be an interesting exercise to hack the GVP board to an A500/A1000. I
    understand that the official C= policy may forbid any further comment on
    this type of hack but I hope they haven't tied your hands that much.

    Thanks for any additional comments,

    Monty Saine

    To the net, I appoligize for following up to my own article, but our
    news reader would not let me cancel my previous article.

    Now to the additional point to the above. Dave, is the missing clock you 
    were talking about the 28 Mhz on pin 9 of the 86 pin?? I could find no
    reference to an 7 Mhz clock. The only pins that are referred to as being
    different between the A500/A1000/B2000 are 9, 11, 20, 60, and 64.

    Again sorry for the followup to my own post .. blame hp-ux and rn.

    Monty Saine