14 Dec
2005
14 Dec
'05
10:49 p.m.
Subject: Re: CUBIX/6809 updates
From: ard at p850ug1.demon.co.uk (Tony Duell)
Date: Wed, 14 Dec 2005 21:35:50 +0000 (GMT)
To: cctalk at classiccmp.org
Well, you could make them!. For the monitor, convert a portable TV (I
wonder if those little 5" B&W TVs that seem to be available everwhere can
be turned into something useful. I can't believe they're that complicated
inside...). For the keyboard, either pull apart a PC keyboard and use the
swithc matrix, or make an interface between the PC keyboard (PS/2 type
port, I guess) and the rest of the system
You can find PC keyboards with 8048/9 or 8051 and put a reporgramed MPU
in. The reprogram can be done one of two ways, disable the internal rom
and piggy back a LS373 and 2716 or use the 87xx eprom part.
An those small B&W TVs are very modifyable, though at 5" 80char lines are
going to be tiny. There's at least one person out there that did it.
Or find a old HERC compatable (9pin) monochrome PC display even when
not working they are easy to fix.
Allison
Or do like
I did in the original portable unit - put on a 6845 and do your
own video display.
No way that would work, as I don't have a TTL level monitor here, or a
real keyboard...