[rescue] Axil-255?

[Jeremy RJ Towers]

Hi Kath,

It seems to me that the SIMMS are in banks of 8.

Thus:

front
1    1
1    1
0    0
0    0
1    1
1    1
0    0
0    0
back

To confirm this, please place 4 SIMMS in bank 1 only

I think  that banks 2 and 3 are those DIMM sockets visible in the picture.

Thus with SIMMS max memory will be 64MB.

I don't know whether the DIMMS could be used at the same time as the SIMMS.

Regards

Jeremy


Katherine Strojny wrote:

>Jeremy RJ Towers wrote:
>  
>
>>Try following the SS2 convention and see what happens.
>>    
>>
>
>Progress!  But not consistent with SS2 convention:
>- With SS2 banks 0 and 1 filled, 32 MB are recognized in bank 0.  Tried
>totally rearranging the same 8 SIMMs within these banks, got same results
>every time.
>- However, when I took out bank 1and just had bank 0 filled, got the
>compose LED.
>- Banks 0+1+2 -> no error LEDs but monitor didn't start
>- Banks 0+ 2 -> compose light
>- Banks 1+ 3 -> compose light
>
>Jeremy RJ Towers wrote:
>  
>
>>When the six  + six are in , what is the memory reported?
>>
>>I am fairly sure these are 4mb sims so I think you said earlier 32mb was
>>    
>>
>shown????  That would make sense if SS" was being followed.
>
>With the 6+6 toward the front edge of the board:
>
>Probing Memory Bank #0: Nothing there
>Probing Memory Bank #1: 32 Megabytes
>Probing Memory Bank #2: Nothing there
>Probing Memory Bank #3: Nothing there
>
>With the back 6+ 6:
>same as above except bank #0 has 32 MB, remainding banks have "Nothing
>there".
>
>So here are diagrams of what has worked so far (hope this makes sense):
>+ = slot filled
>- = slot empty
>
>-    -        (SS2 banks 0+1 -> 32 MB in bank 0)
>-    -
>+    +
>+    +
>-    -
>-    -
>+    +
>+    +
>
>
>-    -        (back 6+6 -> 32 MB in bank 0)
>-    -
>+    +
>+    +
>+    +
>+    +
>+    +
>+    +
>
>
>+    +        (front 6+6 -> 32 MB in bank 1)
>+    +
>+    +
>+    +
>+    +
>+    +
>-    -
>-    -
>
>I guess I need to find out more about the SIMMs.  At this point I'm
>wondering if there are some mismatched sizes along with still not
>understanding the memory bank layout.  I suppose I could try emailing Rave
>about the layout--I couldn't find anything about Axil-255 on their website.
>Anyway, this gives me something simpler to work with, presuming I don't
>time out.
>
>Jeremy RJ Towers wrote:
>  
>
>>Also, those look like 72 pin Dimm sockets. Maybe try a pair of those, if
>>    
>>
>you have them. They will be  72 pin fast page mode parity.
>
>DIMMs, nope.
>
>Thanks for the suggestions.
>
>-k
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