25 Feb
2022
25 Feb
'22
12:23 p.m.
The 8048 is a mask programmed part, there is an EPROM version 8748.?
While the 8048 is mask programmed I believe that the contents of the ROM
can be dumped.
Paul.
On 2022-02-25 16:09, js--- via cctalk wrote:
Hi, folks.
?? I've a HP 9915A computer with an interesting problem.?? The
motherboard utilizes a ceramic Intel D8048 chip.?? The problem is that
this 8048 has a crack right across the top middle of it, and half of
the top of the chip has begun to separate.
? Powering up the machine as-is unsurprisingly results in no
activity.?? HOWEVER, if I push firmly on the cracked area with my
finger the machine starts to operate normally.?? All appearances are
that clamping down the separating piece of the chip re-establishes any
broken wire connections within the chip.
?? I've obtained a replacement P8048AH.?? My question is: do these
chips simply swap like a CPU, or -- as I fear -- is the 8048 a
pre-programmed piece???? More simply put, is this a repairable
problem?? Or am I SOL?
?? Any thoughts welcomed.
- John Singleton