Call for final Elf99 design input

From: Ethan Dicks <erd_at_infinet.com>
Date: Tue Nov 24 14:47:18 1998

>
> > o Dual TIL 311 hex latching displays accessible as output port 4
> > when in run mode.
>
> Have you considered, say, a small GAL-type device driving standard
> 7-segment or 5x7 displays instead?

Not a GAL. I want to avoid any non-popcorn parts beyond RAM, CPU and
big I/O chips. I would _consider_ using the same BCD-to-7-segment
decoder that was in the Elf-II; it properly displays A-F if fed $A through $F.

I am so opposed to needless modern parts that I agonized over the possible
use of a 4508 latch until I saw them in the schematic for the VIP.

> I just checked Jameco's web site and it appears that the TIL 311's
> they sell (at $12 each) may indeed be "production-line" parts
> still being made new by Ligitek. If so, this is a Good Thing!

I located more than one source for used TIL 311's for much less than $12.
They are still several dollars each, but under $10. I wasn't worried about
_those_ as much as some of the others.

-ethan
Received on Tue Nov 24 1998 - 14:47:18 GMT