Re: FSF/AT-bus architecture

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Article #21096

#21096

From: Jim Kingdon
Date: Fri, 07 Apr 1989 23:56

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jhallen@wpi.wpi.edu (Joseph H Allen) writes:
>IRQ0-7*	Interrupt requests.  No ACK cycle- device holding IRQ down
>		is cleared by software.
>DMARQ0-7*	DMA request lines.  Device holding DMARQ low releases when
>		the transfer occures.

No, give each slot its one line.  And its own address space.  Cuts down
on the number of pins on the connector and eliminates conflicts between
cards.  Like the
Apple II or NuBus.  If each board is also required to have a ROM (I'm 
unsure about whether this is a good idea) the whole can operate without
any configuration at all, the system just knows what all that boards
are.  Even without a ROM you only have to say "slot 6."  Help stamp
out DIP switches within our lifetime!

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References: <5768@ux.cs.man.ac.uk> <2445@iscuva.ISCS.COM> <1758@wpi.wpi.edu>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!bionet!ames!amdahl!pacbell!att!chinet!jkingdon
From: jkingdon@chinet.chi.il.us (Jim Kingdon)
Newsgroups: sci.electronics
Subject: Re: FSF/AT-bus architecture
Summary: my $0.02 on bus design
Message-ID: <8162@chinet.chi.il.us>
Date: 7 Apr 89 23:56:09 GMT
References: <5768@ux.cs.man.ac.uk> <2445@iscuva.ISCS.COM> <1758@wpi.wpi.edu>
Reply-To: jkingdon@chinet.chi.il.us (Jim Kingdon)
Organization: Chinet - Public Access Unix
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