On Tue, Feb 9, 2016 at 7:55 AM, tony duell <[email protected]> wrote: >> I don't know if >> you could use the 256K boards (populated with 4116s) in the 11/730 due > > I am pretty sure (havng read and re-read the printset, I am restroring > an 11/730 at the moment) that you can't use 256K boards in that machine. > The memory address decoder (which IIRC is on the MCT board, part of > the CPU) assumes 1M boards.
I don't find that surprising. At the time they were designing the KA730, 1M boards were obviously available (or imminently available) and with 5 memory slots vs 8 in the KA750, I'm sure they never expected anyone to want to use up a slot with a tiny board, so why support them. As part of this thread, I was digging around for context and ran across ads in ComputerWorld and such as archived on Google Books. The ads indicate a reseller price of $4,000 for one MS750CA (1MB board) in 1984. By the time I was buying them (for work) around 1989 I think, ISTR prices around $400-$600 > Anyway, as you say, you would not want that little memory. No good reason to. -ethan
