TMS4500A DRAM Controller Datasheet needed

[Michael B. Brutman]

I'm looking at a memory expansion board for a PCjr that uses this chip 
and I have found a pinout of it from the data sheet archives, but I'm 
having some confusion that a real data sheet or application note would 
clear up.  (Specifically the sheet that I found says it supposed up to 
64Kbit DRAMs, but this board is constructed with 256Kbit DRAMS.)

Does anybody have an version of the full data sheet and application 
notes that they can send me a copy of?


Thanks,
Mike