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From: lphillips@lpami.wimsey.bc.ca (Larry Phillips)
Newsgroups: comp.sys.amiga
Subject: Re: MicroBotics SCSI Adapter
Message-ID: <754@lpami.wimsey.bc.ca>
Date: 8 Sep 89 15:49:03 GMT
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Return-Path: <lpami!lphillips>
To: van-bc!rnews

In <19653@gryphon.COM>, jburnes@pnet02.gryphon.com (Jim Burnes) writes:
>Does anyone know how many times slower Microbotics SCSI adapter is than
>a true DMA adapter? Microbotics claims it is "psuedo-dma", but in my book tere
>is only DMA and non-DMA.  Also does anyone know of any adverse effects that
>said controller has on your basic Amy 1000?  Also how good is the software
>that Microbotics supplies.  Any help would be greatly appreciated.
>Thanks in advance.

Are you speaking of the Microbotics HardFrame? If so, it is DMA. You may be
thinking of one of the GVP products, in which case it is what they call
'psuedo-DMA'. It really means that they DMA to/from a small chuck of memory on
the host adapter that is not connected to the Amiga bus during the transfer.
The processor then gets access to this buffer and does the transfer in one
swell foop, er... fell swoop, er... swell loop. Whatever.

-larry

--
The Mac? Oh, that's just like a computer, only slower.
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|   //   Larry Phillips                                                 |
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