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From: gwyn@smoke.BRL.MIL (Doug Gwyn)
Newsgroups: comp.sys.apple2
Subject: Re: DMA, SCSI and $C1 filetypes questions
Message-ID: <14192@smoke.BRL.MIL>
Date: 18 Oct 90 21:03:06 GMT
References: <1990Oct18.171229.15406@uokmax.ecn.uoknor.edu>
Organization: U.S. Army Ballistic Research Laboratory, APG, MD.
Lines: 26

In article <1990Oct18.171229.15406@uokmax.ecn.uoknor.edu> cmparris@uokmax.ecn.uoknor.edu (Chris Michae Parrish) writes:
>I am planning on buying a new hard drive and either the RAMFast or apple's 
>new SCSI card.  What I was wondering is do I have to have a DMA memory card
>in order to use either of the new SCSI cards?  I realize that it won;t be as
>fast without DMA, but will they still function properly with the plain ole
>apple expansion card?  

I don't know about RAMfast, but Apple's High-Speed SCSI Card can be made to
avoid using DMA by flipping a switch on the card.

I thought Apple's 1MB IIGS RAM expansion card was DMA compatible?

>My second question is wheter or not most of the available DMA cards that use
>SIMMS, use the same SIMMS found in most macintosh models?  I have access to
>about eight 256K SIMMS, and it would be nice to get a card that use them(
>They came from a Mac SE and a Mac II).

You mean RAM cards, not DMA cards.  Yes, they use Mac-compatible SIMMs if
they use SIMMs at all.

>Lastly I was wondering if anyone could tell me the format of $C1 type pictures.

Apple's File Type Notes and the IIGS Hardware Reference Manual cover this,
as well as your other questions [omitted here].  Trying to obtain all the
information you need for programming the IIGS by asking such questions of
the newsgroup is extremely inefficient; you should use the documentation.