>
> On 13-Apr-97, classiccmp_at_u.washington.edu wrote:
>
>
> >The PSU is very similar electrically (although I think it's 114W, not
> >135W, or something). Mechanically it's very different.
>
> That's certainly not much to be running everything including the monitor
> off of. One would think that with the addition of that CRT that they'd have
> upped the power a little.
Remember there's no hard disk - and in fact IBM state that the portable
doesn't support a hard disk - which may account for the lower power PSU.
Mind you, I've seen 5155's where one of the floppy drives had been
replaced by a 1/2 height winchester, with a short-length controller card
in one of the expansion slots. It seemed OK, but then such drives took a
lot less power than the original full-height 10Mbyte unit.
>
>
> >It's worth doing - 41256's are trivial to obtain (off old 286 memory
> >boards if nothing else!), and it takes about 5 minutes. I did it to my
> >portable the day I got it...
>
> What about the other chip you said needed to be put in...how hard is it to
> locate? It doesn't sound like the process would be terribly hard.
The 74F158? Most _good_ electronic suppliers should be able to provide it
for a couple of dollars. I will have to look up exactly what is needed,
though.
> Jeff jeffh_at_eleventh.com
--
-tony
ard12_at_eng.cam.ac.uk
The gates in my computer are AND,OR and NOT, not Bill
Received on Mon Apr 14 1997 - 09:50:47 BST