Xref: utzoo tor.general:314 ont.general:409
Path: utzoo!utgpu!tmsoft!lsuc!sickkids!mark
From: mark@sickkids.UUCP (Mark Bartelt)
Newsgroups: tor.general,ont.general
Subject: Pointer to XT clone motherboards needed
Message-ID: <84@sickkids.UUCP>
Date: 28 Jan 88 16:42:54 GMT
Distribution: ont
Organization: Hospital for Sick Children, Toronto
Lines: 31

Quick IBM PC question, for anyone who may know the answer ...  I'm planning
to buy a 640k XT clone motherboard of some sort, and would prefer to get one
of the so-called turbo boards (the ones that, optionally, run at 8 MHz).

With one exception, all the ones I've been able to find thus far provide only
a dip switch to select between the standard clock rate and the 8 MHz clock.

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,
but the people who sell this don't know exactly what the code that does this
actually *does* to select one clock or the other.  I need to know since I'm
not a DOS user; we use one or another flavour of UNIX on our XTs.  But sadly,
the people who sell the "magic keystroke" type of turbo board are, like nearly
all computer retailers, terribly unknowledgeable about the products they sell.
Certainly not in the wizard category, anyway.  Presumably all I need to do in
order to change clocks is "outb someport,somevalue".  But they can't tell me
what the "someport" and "somevalue"(s) are.  Sigh.

So ...  Does anyone out there know of a local source for XT turbo boards that
(1) can switch clocks under software control, AND (2) come with documentation
that tells one how to do it (or, is sold by someone who actually knows)?

If not, I may have to disassemble the "magic keystroke" code.  Not a fun way
to spend a day ...

As usual, thanks in advance.

				Mark Bartelt
				Hospital for Sick Children, Toronto
				416/598-6442
				{utzoo,decvax,ihnp4}!sickkids!mark