Thread View: comp.sys.amiga.tech
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Started by Rick Morneau
Wed, 19 Dec 1990 19:33
Amiga 3000, HardFrame & 8-UP: Will it work?
Author: Rick Morneau
Date: Wed, 19 Dec 1990 19:33
Date: Wed, 19 Dec 1990 19:33
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I currently own an Amiga 2000 with a Microbotics 8-UP memory board and a Microbotics HardFrame HD controller, controlling a Quantum 80S drive. Unfortunately, the motherboard for the 2000 is Rev 6, and does not allow simultaneous operation of the memory board and the HD controller. I understand that this is a design flaw which was corrected in later versions of the mother- board. Unfortunately, I discovered this after the warranty ran out. Currently, I am running with only the HD, and letting the memory board collect dust. Recently, I've been considering purchase of the more powerful Amiga 3000. My question is: will I be able to use my memory board and disk controller on the 3000? If anyone out there can provide an answer to this, I would appreciate very much hearing from you. Many thanks in advance! Rick *=*=* A little rebellion now and then is a good thing. (T.J.) *=*=* = Rick Morneau Idaho National Engineering Laboratory = * mnu@nairobi.inel.gov Idaho Falls, Idaho 83415 * =*=*=*=*=*=* All kings is mostly rapscallions. (M.T.) =*=*=*=*=*=*=
Re: Amiga 3000, HardFrame & 8-UP: Will it work?
Author: Dave Haynie
Date: Thu, 20 Dec 1990 23:22
Date: Thu, 20 Dec 1990 23:22
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In article <9012191933.AA00620@.nairobi.inel.gov.inel.gov.> mnu@INEL.GOV (Rick Morneau) writes:
>Recently, I've been considering purchase of the more
>powerful Amiga 3000. My question is: will I be able to
>use my memory board and disk controller on the 3000?
The memory board will work fine, though of course, much slower than normal
A3000 memory. There's some kind of a problem with the HardFrame, which appears
to be a data hold time problem, that makes it fail with DMA to Chip RAM on the
A3000. It'll work fine with DMA into any expansion bus memory, and can't
reach the A3000's motherboard memory. So yes, it will work OK on the A3000
as long as you specify Fast Memory in the board's mountlist. However, there
is a software problem with the Hardframe (and most Zorro II DMA controllers),
in that they never considered that there might be non-24 bit Fast memory in
the system. So they often allocate buffers in A3000 memory, that they can't
reach.
All of which is moot, of course, because the A3000 has a much faster SCSI
controller built in. Microbotics follows the Rigid Disk Block standard, so
you should be able to take any drives you have off that controller, perhaps
adjust a SCSI address jumper if necessary, and them plug them right into
the A3000.
>= Rick Morneau Idaho National Engineering Laboratory =
--
Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests"
{uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy
"I can't drive 55" -Sammy Hagar
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