26 Oct
2015
26 Oct
'15
4:12 p.m.
On 26/10/2015 17:09, "John Robertson" <jrr at flippers.com> wrote:
Hi Adrian,
Perhaps one final test for your 2332s is to do a Diode Test on the pins
relative to the ground pin (pin 12) and Vcc pin (24). These should sow
either open or something like 0.6 or higher voltage drop across the pins
- exchange the probes to check both directions.
I'll make up a small wiring harness that'll let me do that, it'll give me
something to do while I'm waiting for my lady to ring :)
If your gates all read OK (check between Vcc and GND
as well!), then it
might be that the brand of 2332 you have simply draws more current than
your programmer likes. What brand is the PROM? Perhaps it is in one of
our reference book libraries...
They're all stock MOS 2332 PROMs used in every CBM PET. Mike's already
linked to the archive and tonight I've successfully burnt the 8032-flavour
PETTEST.BIN so my programmer is happy with Ti 2532JL EEPROMS that I
liberated from work.
Cheers,
--
Adrian/Witchy
Binary Dinosaurs creator/curator
Www.binarydinosaurs.co.uk - the UK's biggest private home computer
collection?