Re: OctoRAM Memory upgrade

[lunatic@netcom.com (Lunatic Johnathan Bruce E'Sex)]

In article <1993Jan12.022552.27758@nuscc.nus.sg> ltchean@iss.nus.sg (Lim Thye Chean) writes:
>I am now using 2MB on my RAM card, all 8 rows filled with 256K simms. I plan
>to upgrade to at least 4MB.
>
>1. Can I upgrade to more than 4MB?
>2. Do I have to throw away all 8 rows of 256K simms and used all 1MB simms?
>3. Can I mixed both simms? For example, reserved 6 rows of 256K simms
>   (6 x 256K = 1.5MB), and used 2 rows of 1MB simms to get a total of
>   3.5MB? Or reserved 4 rows of 256K simms (4 x 256K = 1MB) and used 4
>   rows of 1MB simms to get 5MB?
>4. Can I have the dip-switch configuration? 
>5. What precautions should I take? 
 
 
 1: Yes, but you need a RamFAST if you want to have DMA on with more
    than 4 Megs.
 2: Yes.  256K SIMMs are practically worthless, these days.
 3: No.
 4: Yes.  For 1 Meg SIMMs:
 
   1 Meg    2 Meg    4 Meg    8 Meg
   -----    -----    -----    ----- 
   xxx .    xxx .    xxx .    . xxx
   . xxx    . xxx    . xxx    . xxx
   . xxx    . xxx    . xxx    . xxx
   xxx .    . xxx    . xxx    . xxx
   xxx .    xxx .    . xxx    . xxx
 
 5: Don't lose the above chart.  (:

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