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From: henry@utzoo.UUCP (Henry Spencer)
Newsgroups: comp.sys.m68k
Subject: Re: DTACK*
Message-ID: <8814@utzoo.UUCP>
Date: Wed, 21-Oct-87 15:06:22 EDT
Article-I.D.: utzoo.8814
Posted: Wed Oct 21 15:06:22 1987
Date-Received: Wed, 21-Oct-87 15:06:22 EDT
References: <4215@pyr.gatech.EDU>
Organization: U of Toronto Zoology
Lines: 17

> ... possible to wire DTACK* directly
> to ground and have a 68000 system run at full speed, provided the memory
> access time was fast enough. This runs counter to my understanding of
> how DTACK* works...

It is definitely possible.  Digital Acoustics, the predecessor of the new
"DTACK Grounded" company, made rather a lot of money selling 68000 boards
that did this and ran real fast.  Their stuff worked fine.

(Ironically, they changed name at the same time as they discontinued their
hardware line to become a software-only company!  Nothing wrong with the
hardware, it just wasn't selling nearly as well any more, and they got out
*before* they started losing money [to the accompaniment of considerable
chortling about assorted larger companies that weren't so cautious]).
-- 
PS/2: Yesterday's hardware today.    |  Henry Spencer @ U of Toronto Zoology
OS/2: Yesterday's software tomorrow. | {allegra,ihnp4,decvax,utai}!utzoo!henry