Xref: utzoo tor.general:317 ont.general:413
Path: utzoo!yunexus!geac!daveb
From: daveb@geac.UUCP (David Collier-Brown)
Newsgroups: tor.general,ont.general
Subject: Re: Pointer to XT clone motherboards needed
Summary: Quibbles about speed-changers
Keywords: speed-change
Message-ID: <2186@geac.UUCP>
Date: 30 Jan 88 16:59:32 GMT
Article-I.D.: geac.2186
Posted: Sat Jan 30 11:59:32 1988
References: <84@sickkids.UUCP> <416@spectrix.UUCP>
Reply-To: daveb@geac.UUCP (David Collier-Brown)
Distribution: ont
Organization: The G. Yac Co. Ltd.
Lines: 23

In article <416@spectrix.UUCP> clewis@spectrix.UUCP (Chris R. Lewis) writes:
>In article <84@sickkids.UUCP> mark@sickkids.UUCP (Mark Bartelt) writes:
>>Quick IBM PC question ...
>>I have managed to locate one dealer who sells a different type of turbo board.
>>It will allegedly switch between the two in response to some magic keystroke,

>Unfortunately, the main CPU CANNOT get at the I/O ports on the keyboard 
>controller.  The ol' "you can't get there from here" problem)  Thus, 
>the only way to change speed is via the keyboard, but not by program.

Fortunately, that isn't the only way to do it.  Its just a cheap
way.  Max Southall at Micro/Access (max@lethe.uucp) has boards which
switch speed in rational and useful ways, notably when one presses
the "crash MS-DOS" key-sequence or when the board has to slow down
for a slower peripheral (floppy drives).  He's also good about
showing how things work (plug!).

--dave (I'm biased, I have one of his CPM Machines) c-b
-- 
 David Collier-Brown.                 {mnetor yunexus utgpu}!geac!daveb
 Geac Computers International Inc.,   |  Computer Science loses its
 350 Steelcase Road,Markham, Ontario, |  memory (if not its mind) 
 CANADA, L3R 1B3 (416) 475-0525 x3279 |  every 6 months.