Lee Privett wrote, on 10/Mar/11 23:24 | Mar10:
Of the three large chips, one is an EPROM 2764(middle), the one below is an
8059 or WD1770 and the largest chip is marked as a 4500A. The memory chips are
M5K4164 and I suppose that filling the other 8 empty sockets with same would
increase the memory to a maximum of 512K the standard for the original QL, that
is if it works, still yet to try that, maybe at the weekend.
I am pretty sure when expanded to 512k, the power cannot be taken from
the QL. That is when Medic powered from the floppy drive.
Tony
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