4 Apr
1999
4 Apr
'99
8:51 p.m.
Date sent: Mon, 5 Apr 1999 02:28:05 +0100 (BST)
Send reply to: classiccmp(a)u.washington.edu
From: ard(a)p850ug1.demon.co.uk (Tony Duell)
To: "Discussion re-collecting of classic computers"
<classiccmp(a)u.washington.edu>
Subject: Re: homemade computer for fun and experience...
Hi!
Tony scribbled:
Sure. It's not hard. I was thinking more for the chap who was building his
first homebrew. When you're doing that you want as few 'variables' as
possible, and untested code in a microcontroller is something you must
avoid
Tony is correct, I need to keep confusion factor and variables low.
The 8742 doesn't translate scancodes to ASCII or
anything like that
AFAIK. It's basically a serial->parallel converter with some smarts. You
still need a lookup table even if you use the IBM-programmed 8042.
-tony
_Groan!_
Must have to do the lookup translation part hooked to that "8042"
from keyboard itself even it was pulled off the old
chop shey
motherboard?
That one of the variable I'd avoid if I can at first.
options:
la-Altair front panel style (ugh)
parallel ascii keyboard (bit problematic especially on keyboard side
components and wirings.)
or serial ascii keyboard (less complex and easier to do).
Any ideas?
Wizard