Re: Troubleshooting X/Lisa RAM boards - first draft

With your data and Ian's it does appear that for the two board case, the words are in the order of MEM 2 then MEM 1, and I also had the row order backwards... swapping both of those, I think the pattern now agrees with your data, Ian's data (and enough of my data to make the exceptions suspect... due to my excitement I probably wrote down the wrong slot for a couple of the tests).

So with two boards, do you agree we have:

1 Board in MEM 2
E D C B X X X X

1 Board in MEM 1
B C D E X X X X

2 boards
- MEM 2 MEM 1
- E D C B B C D E

This would indicate Ian's board #3 needs a new chip at E6.

I think we have progress! Many thanks for your contribution of time and data.

James

>With the second board, I piggybacked a good 4164 over B2, which seemed to a
>suspect according to the data below (the other suspect being E2).
>
>The board passed the memory test! The problem on the second board has now
>been identified!
>
>James says in the draft....
>>If you have two 512K memory boards, the first 4 words are associated with
>>slot MEM 1, and the next 4 words are associated with slot MEM 2.
>
>James, at least with my data it seems like the reverse of this. With two
>boards fitted the first 4 words are associated with MEM 2 and the next with
>MEM 1, yes?
>
>Just to be clear on my backplane, MEM 2 slot is the one at the end,
>furtherest away from the CPU card (it's marked 2).

-- 
-----
You received this message because you are a member of the LisaList group.
The group FAQ is at http://lowendmac.com/lists/lisa.html
To post to this group, send email to lisalist_at_email.domain.hidden
To leave this group, send email to lisalist+unsubscribe_at_email.domain.hidden
For more options, visit this group at http://groups.google.com/group/lisalist