Xref: utzoo comp.sys.amiga.hardware:3513 comp.sys.amiga.tech:14452
Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!wuarchive!psuvax1!psuvm!psuecl.bitnet!d6b
From: d6b@psuecl.bitnet
Newsgroups: comp.sys.amiga.hardware,comp.sys.amiga.tech
Subject: Re: any suggestions on doing DMA data transfers on the A2000/A3000
Message-ID: <1990Sep13.204450.20610@psuecl.bitnet>
Date: 13 Sep 90 20:44:44 EDT
References: <4931@bdt.UUCP>
Distribution: usa
Organization: Engineering Computer Lab, Pennsylvania State University
Lines: 16

In article <4931@bdt.UUCP>, bms@bdt.UUCP (Vance Chin) writes:
>       I have been looking at the MC68450 dma controller, but some people
> do not like this one, any suggestions?

One option is to use an actual 68000 CPU. Just take over the bus (somehow
:-)) and then the 68000 can access any cards in the system (as well as
the motherboard, of course). Last time I checked, the 68000 cost about
$5 in quantity (plus the cost of any RAMs/EPROMs, and glue needed).
Despite this, the hardware guru(s) I've consulted say it's cheaper to use
a MC68450, unless your card needs a dedicated CPU anyway (although
C= violated this quaint little rule by using a 4502, grumble grumble :-))

-- Dan Babcock

> Vance Chin
> {uunet,ucbvax}!unisoft!bdt!bms