Expansion slots in Grids was Re: Anyone have any experience replacing a Dallas 1287 with a 12887?

From: Joe <rigdonj_at_cfl.rr.com>
Date: Wed Jan 1 17:31:30 2003

At 09:50 AM 1/1/03 -0800, Ethan wrote:
>--- Lawrence Walker <lgwalker_at_mts.net> wrote:
>> A while back I had problems accessing a Grid 1520-286
>> because of a password. If I remember correctly it was a
>> DS1287A. The A signified it as resettable and grounding
>> 2 pins cleared the memory.
>I've seen that detail on the web pages.
>> Your problem would seem to
>> stem more from the BIOS settings and it is going to the
>> default setting and since the Dallis chip is dead nothing
>> is retained.
>> ISTR that the 12887 is a drop-in replacement.
>> If you want to call soldering all those pins "drop-in"
>I do. Soldering is not offputting to me.
>> Dallas has a bunch of info on the chip. I don't have the
>> URL handy.
>I have those data sheets. I was curious to learn from others
>> Considering all the problems and low used prices
>> involved. You might consider getting an old Grid 1520
>> which also has the advantage of an additional EPROM
>> slot which can contain info configuring various aspects of
>> the computer, including a system boot.
>I wouldn't mind a Grid, but unless it has an ISA slot, preferably two,
>it won't work for my application

   Mine has two slots. IIRC one is a 16 bit ISA slot and the other is 8 bit. They're both located in an expansion pod that hands on the bottom of the Grid.

Received on Wed Jan 01 2003 - 17:31:30 GMT

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