30 Dec
2011
30 Dec
'11
11:59 p.m.
no idea i need to pull my spare keyboard outa storeage though this project
is about to get put aside for next 18days as i will be taking off to work
earlyer then expected txs for the suggestions
On Fri, Dec 30, 2011 at 2:25 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
turns out it does power up i just didn't wait long enough though i've
come
to a new issue.
when i hit return once i put the floppy in the drive it does not try to
read the disk
Now I don;t know this machine at all, but do I conclude from that that
you are getting soemthing useful on the screen amd that therefore the
processor/video is working?
I think I would start at the floppy drive interface connector, simply
becuase it's a standar, known, plinout. You want to see if the the
machine is trying to start the floppy drive motor (look at the drive
select and motor on signals with a logic probe). I'd also check the power
supply rails. I suspect the 12V rail, needed for the drive motors, is
also used by the video monitor, but it's not unheard-of for the latter to
be a separate supply. A voltmeter on the drive power connector will tell
you for sure.
Could it be the keyboard? You mention pressign the return key. Do you
know if this is actually doing anything? Could it be keyswitch problems?
-tony