Closed 2 amstrad 40058 asics.

Status
Not open for further replies.

roy_bates

resistance is futile!
VIP
Rating - 100%
104   0   0
Joined
Dec 18, 2011
Posts
8,396
Country
england
Region
birmingham
as in title,looking for two amstrad 40058 asic's for a spectrum 128+2.ic10.
or equivalent.

dont know if these fail alot or not as ive just had a spectrum break down for absolutely no reason while fixing the tape deck:(

anybody know what parts fail in these machines?


ive got two with exactly the same symptoms but one was working just a while ago...


EDIT:hmm,apparently these are PCF1306P and ZX8401...i have seen the ZX8401's on 48k spectrums on a issue 6 can anyone please confirm these are the same parts?
and if they are they are multiplexers?


or is there a way to make these up on a pcb with 74 logic to replace them and plug them into a socket?
 
Last edited:
thank you,thats very helpful.(schematics are anyway)

only one problem now,i cant read whats being said/writen,can someone translate please so im sure what im doing?

is it spanish?

in regard to this:

picture.php
 
Last edited:
so this controls the upper memory? that would explain the need for a pal on the 128+2.

is that right.

i feel like im talking to myself:LOL:

EDIT:hmm,i think these are going to be pretty hard to get thinking about it, interesting as i have a issue 6 48 as well that has the same problems.
i will probably make one of these if no-one has these about.and see how i get on.
just need to translate the notes on it.

anyone here feel up to knocking out a few of these pcb's as blanks?
 
Last edited:
i dont need these anymore lads.:D

i somehow had two spares in a parts box,could a mod please close.
 
Status
Not open for further replies.
Back
Top Bottom