From: Bo Zimmerman (bo_at_zimmers.net)
Date: 2005-12-10 16:46:42
Please forgive an obvious or potentially stupid question, but doesn't that
mean that, since they are 16k X 1s, that they are 2k chips (16kilobits/8 = 2
kilobytes). So, since I have 16 of them, wouldn't that make it a 32k
machine?
- Bo
> -----Original Message-----
> From: owner-cbm-hackers@ling.gu.se
> [mailto:owner-cbm-hackers@ling.gu.se] On Behalf Of Gabriele Bozzi
> Sent: Friday, December 09, 2005 6:34 AM
> To: cbm-hackers@ling.gu.se
> Subject: Re: Question about PET DRAM
>
>
> Here is an interesting posting:
>
> http://classiccmp.org/pipermail/cctalk/2002-March/069729.html
>
> ****** Attached posting ******
>
> There were several makers that sported an xx15 type where the
> normal 16Kx1 dram was an xx16. What these were, generally
> but not in all cases, were products of a die shrink that
> resulted in a shorter refresh interval. That was certainly
> the case with the MOSTEK 4115's. Those worked famously well
> in applications like the Apple][ which was a big seller at the time.
>
> ****** End attached posting ***
>
> So, it seems to be a pin-compatible 4116.. I guess a 400ns
> item from the part number you mention (which is not unusual
> with the double nature of "phi" clocking of the 6502". I am
> not a PET expert but imho the design of this machine did not
> allow use of esotheric parts (different pin-count etc.). I
> guess good old 4116s (provided access-speed copes) should do.
>
> Gabriele
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