9 Nov
1998
9 Nov
'98
11:26 p.m.
< > I happen to have a few tubes of both 2101 and 5101(cmos).
<
< Lucky you. I have a couple of 1822 (CMOS RCA part) and a few 2101's.
< have not yet found a source of 50 to 100 256x4 2101-compatible SRAMs.
< I do have a pile of 2114's, but I'd rather use something else.
Those 2102s and 5101s are also 20 years old! I got them a while back.
What's wrong with 2114s? I've used them in a lot of projects and products
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.
< I, too, have the VIP docs. We should compare offline to see if one has
< something the other does not.
Sure. I also have UT4 monitor rom.
< Back in those days, I built the TVT-6 but never powered it up because I
< never got my hands on a video monitor. I was just a kid, and a $75 to
< $150 device might as well have been $75,000 or $150,000 for as little
< as I had.
By then I'd gotten in to the semiconductor industry and things like
monitors and the like were less a problem. All that means is I'm older
than you. ;)
< The 1854 is still in production by Harris. I do not think that the 186
< is available, but it is the "correct" chip to use with the 1802. Anythi
the 1861 was useless by my standard unless you wanted to play low res
graphic games. At the time I was building up a system to run Basic or
better.
< else, like a 6845, would be _way_ too much work to be worth the effort.
Not really.
< There is a 1871 keyboard encoder that is still in production. I even
< have a small tube. Perhaps that could be a drop-in replacement on an
< Elf-II replica. I'll visit the Harris web page and peruse the data shee
I don't think so.
< I was clearly never in your league, but then, I was just a snot nosed
< kid with bigger dreams than my pocket book allowed for. At 16, I had
< an Elf and a PET and was always pushing them to do more.
At 16 the PDP-8 was just announced and running some $20k a copy.
< That would work. I always wanted a CMOS replacement for the TIL311 disp
< so that I could power it off of a lantern battery for virtually forever
< It was the one TTL part on the Quest design.
The led was the power hog, the latch/decoder was only a fraction of that.
Allison