CUBIX/6809 updates

[Allison]

>
>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
>
>> >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...
>
>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