Re: Mousecard HW question...

["Thomas Kelly" <tjkelly@sbcglobal.net>]

I had a mouse card that was not recognized,
I replaced the 74LS245 chip (buss transceiver as I recall).
That fixed the problem.
Cut out the part by cutting the IC leads.
Remove pins individually and suck out solder from holes.
Install a IC socket.
Install new chip.

Good Luck

"Randall Frank" <randall-frank@computer.org> wrote in message
3D018B41.7445B52C@computer.org">news:3D018B41.7445B52C@computer.org...
> Hello,
> I just picked up a mouse card (670-0030-C, 1983) and
> poped it into my //e, slot 4.  Everything that looks for the
> mouse came back saying there was no mouse.  So, I quick listed
> the ROM at $C400 and found that there was no ROM there (random
> bytes that changed with each read).  So, I think I may have a
> defective card (yes, it does have all the chips on it).  I notice
> that there are two pads on the card labeled 'X1' and 'X2' any
> chance I need to open one up (X1 is closed) or solder one
> closed (X2 is open)?  I have tried other slots and get the sam
> results, no ROM.
> Any other diagnostics someone might suggest?  It looks
> like a pretty simple card...
>
> Thanks.
>
> --
> rjf.
>