26 Nov
2006
26 Nov
'06
2:45 p.m.
The processor board has the provision for 1K EPROM, which isn't installed.
I'd assume it's for a 2708 device. Unfortunately I cannot program these
devices, so I can program a 2716 and do some mods to the processor card to
make the 2716 work and show only the 1st 1kbyte.
The pinouts of the 2708 and 2716 are pretty similar, the differences
relating to the extra 2 supply lines on the former as against the A10
address inout and, IIRC, an OE/ line on the latter.
If I were you, I'd not modifg the proecessor board, I'd make up an
adapter that plugs into the existing socket (maybe replace it with a
turned-pin socket) and which carries the 2716. Since the pinouts are
similar, you could use stripboard for this, jsut cut/jumper the few pins
that are different.
-tony