Re: Mousecard HW question...

[Stephen Shaw <stephen@apple2.org.invalid.za>]

On Thu, 13 Jun 2002 18:22:47 +1200, Roger Johnstone wrote:

> In article <3D08055C.4A2BD15@computer.org>, Randall Frank
> <randall-frank@computer.org> wrote:
>
>> "Michael J. Mahon" wrote:
>>>
>>
>> ...
>>
>>> Of course, if it has no label or a translucent label, then
>>> if it spent enough time in sunlight, or under very bright
>>> artificial illumination, data could eventually be lost.  The
>>> critical issue is the cumulative amount of short-wave
>>> ultraviolet dosage.  It's bad for humans and EPROMs.  ;-)
>>>
>>> It sounds like you have something else wrong.
>>
>> That's what I was afraid of (and the way things are looking).
>>
>>>
>>> Does it do the same thing in other slots (not 3, of course)?
>>> Are the slot connector and contacts clean?  Are all the
>>> socketed chips on the card seated, and have they been
>>> loosened and re-seated recently?
>>
>> Yes, I reseated the socketed chips and tried other slots
>> (including one I know works) with the same results.  Looks
>> like I will need to work this one backward from first
>> principles...
>>
>> Is there any other component on this board that I should
>> suspect over others?
>>
>>
>> BTW: I really appreciate the input, even if I never get
>> this card up and running, thanks!


Stupid question - have you made sure the mouse if working by using it with
another mouse card or early Mac (with the DB9 connector on it)?

> Something simple to try would be to swap the EPROM with a known good one of
> the same type from another card. It won't matter what's in the EPROM as
> long as you don't activate the card, but you should be able to read the
> data stored in it if the rest of the card is OK.

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