Elf99 - rebirth of a classic

From: Allison J Parent <allisonp_at_world.std.com>
Date: Tue Nov 10 18:33:04 1998

< > What's wrong with 2114s? I've used them in a lot of projects and produ
< > and they fine if a x4 orginization is handy. I have 24 of them in use
< > for a intersil 6100 (12 bit pdp-8) based system.
<
< Any schematics? ;-)

Yep!

< I've seen schematics, and it's not the 6845 end of things that daunts me
< it's the 1802 end, trying to adapt a 6800/6502 bus interface to the mor
< limited 1802 interface implementation. Effectively it's the difference
< between memory mapped I/O and non-memory mapped I/O thaat have got me.

Memory mapped IO on the 1802 was trivial to do and could be used to good
advantage (1861 used it for the display).

< Coincidentally, I purchased a PDP-8/L at 16 for the princely sum of $35

Had an 8e years ago and gave it away, looking for another.

< Still, the latch required +5.0VDC, the only part with a tight power
< requirement.

The latch was not fussy about power, the led portion was power hog.

Allison
Received on Tue Nov 10 1998 - 18:33:04 GMT