20 Dec
2007
20 Dec
'07
10:29 a.m.
From: Robert Nansel <bnansel at bigpond.net.au>
1) To build a complete functional computer,
including memory, using
no more than 256 2N2222-ish transistors (plus scads of diodes, resistors,
etc.).
2) Use no ICs or other parts that wouldn't have been available to
hobbyists ca. 1965.
Well, if you put no limit on the number of diodes (just 3 terminal
devices), you can go a heckuva long way using tunnel diodes or even
diacs.
Or you could use magnetic core logic, using transistors only as I/O
terminals and clock drivers.
Either of those would certainly satisfy the 1965 aspect.
Or is the restriction on "negative resistance devices"?
Cheers,
Chuck