Question about PET DRAM

From: Bo Zimmerman (
Date: 2005-12-08 07:59:55

Hello all... I recently got a CBM 2016-N that appears to be working fine.
It reports the appropriate 16k at startup and everything.  My surprise can
when I popped the case.  Inside I found that all 16 ram banks were filled,
as on a 32k machine.

My first thought was that it was an upgraded 2016 which SHOULD be reporting
32k, but has a bad chip.  But first I needed to make sure that those two
rows of dram really represent 32, so I looked up the part number
(MK4115p-40) and found nothing.  The 2001N schematics show that those banks
should have 4116 chips, which are 16k by 1s.

Can anyone help me out on what a 4115 is?  And whether 16 of those bad boys
makes 16k or 32?

- Bo

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