On Mon, Mar 5, 2012 at 4:15 PM, allison <ajp166 at verizon.net> wrote:
Ethan Dicks
wrote about the COSMAC Elf:
It's certainly true that the 4016 and 4066 have differences in their
characteristics. ?However, in the simple way in which it is used in the Elf,
I can't see how it would make any difference. ?I can't say that I've
actually tried it, though.
I have no difference.
I was told by the engineer who made the Quest SuperElf that he had a
problem subbing 4066s for 4016s. He was rather insistent there was a
problem. I have not tried it myself, either. My breadboard Elf and
my Quest Elf have 4016 switches.
that and also making sure all the wires go where they
are supposed to.
Indeed. That was my problem on my Popular Electronics Elf.
I've built many of the COSMAC ELFs over the years
and still have my wire
wrapped original, a
QUEST PCB version and a few more wire wrapped variants. I made a version of
the ELF on S100.
Nice.
I also have the EELF and ELF2000. ? It was a simple
and very non-critical
CPU to build up and make work.
Yep. I've built those, too. I just pulled out my Elf2K this weekend.
I need to re-do the switch plate label - somehow a drop of oil got
onto the paper and left a stain.
?Of all the 1802 is the most interesting as it's
not unlike the PDP-8 in that its
simple to the extreme yet still useful.
Agreed.
There's one thing I can do on my Elf2000 that I still can't do on a
PDP-8... play Zork.
-ethan