Re: RamWorks III chips

[Spaceman_Spiff@ocean-side.ecore.fnet.org]

In Article <<01706QUEQCUKPRDXUCA@ods.sol.net>>,
<dreamer@ods.sol.net> wrote:
>
>I have a fully populated RamWorks III (1Mb) in my //e, but a while back
>I used the RW III utils to test the card and on only ONE of the tests it
>showed that 2-4 (I don't remember how many) of the chips were bad in the
>last bank of chips.  I recently got ahold of some chips that are usable
>in the Apple //gs memory expansion board (1Mb) and I was wondering if
>these chips would work in the RW III.  The writing on the chips is:
>
>KM41256-15
>6402 KOREA
>
>and
>
>TMS 4256-15NLA
>EHP 8749
>A
>
>I know that these are the correct size, but I'm not sure if speedwise
>and such they are ok.  In particular, the "-15" has confused me, as the
>chips on the RW are "-12" except for three that are "-10".  The x1256
>varies, where x is either 2,4 or 8.  The three with the "-10" have
>different designations than all the other chips, being as follows:
>
>HY53C256LS-10
>8903A KOREA
>
>and
>
>P21256-10
>919 USA
>
>The three above chips may very well be the ones I'm having trouble with,
>but I have no way to know, as I accidentally trashed my RW III Util
>disk.  Could someone let me know which chips (of the above) I can use,
>and if none what I need and where I can get it?  And if someone could
>send me the RW III utility disk I'd be eternally grateful.
>
>Give what you would like to receive,
>Glenn
>Lord Wilderness

Glenn,
I think the reason that your card failed the ram test is you have different
speed ram chips mixed together.  -10 = 100nSec, -15 = 150nSec and -12 =
120nSec.  It's not a good idea to mix different speed ram chips in the same
bank.  I suggest that you find and replace the ram chips that and not the same
speed.  If you need any more help let me know!

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