ejb@think.ARPA (Erik Bailey) (09/07/85)
Does anyone know of a way to switch sppeds on a Compaq DeskPro under SOFTWARE? I have found times when it would be useful to switch speeds automatically, such as when booting a non-Compaq DOS (ie PC-DOS 3.0). Also, a flasher program could make a neat attention-getter... BTW - I have Fansi-Console, so don't recommend that (it does speed switching). One more question. There is a switch on DIP #1 that is labeled 'compatibility: enhanced features/normal'. Any ideas? Thanx a lot, and please send replies to the net if they are useful... --Erik
ejb@think.ARPA (Erik Bailey) (11/09/85)
[Go ahead, eat my day!]
Well, response from my (ancient) plea for DeskPro software speed switching
has finally picked up (2 whole msgs!). Anyway, a couple days ago this
appeared in my mailbox. I immediately tried it, and found that it worked.
I wanted to find out HOW it worked, so I fired up PFIXPLUS (symbolic
debugger), and traced the code through. But, not knowing a thing about
8086 ASM, I was unable to extract the relavent part of MODE.COM to do
the switch. Can anyone do this? Unfortunately I cannot post ASM to MODE,
as (I assume) it is copyrighted by Compaq. Well, here is the msg, and
THANKS to Fred McClimans (?) for this bit of undocumented info. --Erik
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Received: from ddn2 (ddn2.arpa) by GODOT.THINK.COM; Thu, 7 Nov 85 11:08:55 est
Date: 7 Nov 85 10:52 EST
From: McClimans@DDN2.ARPA
Subject: Compaq MODE command
To: ejb@think.com
Cc: McClimans@DDN2.ARPA
After putting in some time last night on the Compaq dilemma, I came up with
this:
MODE SPEED=<FAST/COMMON>
I don't know if you already hit on this (it isn't in the Compaq doc's), but
it is interesting none the less. The next step is to break it down.
- Fred
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Erik Bailey -- 7 Oak Knoll (USENET courtesy of
ihnp4!godot!ejb Arlington, MA 02174 Thinking Machines Corp.
ejb@think.com.arpa (617) 643-0732 Cambridge, MA)
"I was walking in a forest one day and a tree fell in front of me,
and I didn't hear it."