🚀 go-pugleaf

I have 8 256K x 1 bit DRAMs that I'd like to use for memory in a project.
      The data will be an 8-bit digital representation of a voice signal.
      I don't have spec sheets for these chips, and I can't begin to imagine
      where to look for them.  They are commonly used in Commodore 64 and 128
      Ram Expansion Units, and I've heard that they're also used in older
      286 machines.  What I need is a brief description of the pins and
      timing.  Here is the info I have so far:

The chip looks like this:

              _16_15_14_13_12_11_10__9_
             |        9005 B USA      |\        On a couple of the chips,
             |                        | |       the 9005 is an 8936 instead,
             |      *MT   1259-12     | |       but the rest is the same.
             |________________________| |
              \________________________\|
                1  2  3  4  5  6  7  8

Pin 8 is +5V, pin 16 is GND, and pins 1,3-7,9-13,15-16 are common to all the
      chips in one bank of a Commodore Ram Expansio Unit.  I suspect that
      pin 14 is some sort of column select, and pin 2 may be the data line.
      The remaining pins must make up a WR line, 8 1/2-address lines, and
      an RAS line.  Since they are delicate chips, I am reluctant to
      hook them up to find out what the lines do.  I think they may be 41256
      chips, bit I'm not sure.

      I plan on connecting the chips to some sort of counter system to cycle
      through the addresses, with reffreshing going on in between clock
      pulses, but I'm not sure if this is the correct way to do it.

      Any info would be greatly appreciated.
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