30 Jun
1999
30 Jun
'99
10:05 a.m.
I doubt that there's need for the high voltage drivers. Any open collector
should work if your LED's are driven from the 5V supply.
Be careful with your socket, i.e. make sure things will fit back together
before you solder it in!
Dick
-----Original Message-----
From: Bill Sudbrink <bill(a)chipware.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Wednesday, June 30, 1999 3:20 PM
Subject: IMSAI front panel (7405 == 7406)??
I'm suspicious of one of the 7405s (Hex
open-collector
inverters) driving the data lines to the MPU-A. I
don't have any replacements, but I do have a handfull
of 7406s (Hex open-collector high-voltage inverters).
The pinouts in the Chip Directory look the same, only
difference by them is that the 7406 is "Maximum output
voltage is 30V". I think I'll try socketing the
suspect chip (U1 for anybody keeping score) and putting
in a 7406.
2 Jul
2 Jul
8:24 a.m.
New subject: Mike Ford = email black hole?
Every time I wanted to contact someone directly for example Mike
Ford, I does not get any replies back. I have no spam block.
Just concerned and I mean to do business.
Wizard
8:16 p.m.
New subject: Mike Ford = email black hole?
Every time I wanted to contact someone directly for
example Mike
Ford, I does not get any replies back. I have no spam block.
Just concerned and I mean to do business.
Black hole? You've seen my garage? ;)
Sometimes I am just busy, other times I just don't have an answer handy
combined with busy. If I don't know something or can't do it, I typically
respond right away saying so, but the "maybe" stuff falls into a think
about it before responding heap. Things I must both weigh and think about
send me into a spiral and can take some time.
The nature of network communications brings on a false sense of the speed
things happen. Somethings are very quick, other times a simple transaction
drags on over months.
3 Jul
3 Jul
3:54 a.m.
New subject: Questions about an IOTech SCSI 488/D Bus Controller
Hi all,
I just picked up one of these devices, and (of course) it had no
documentation or drivers with it. I would like to set it up on my PC
with an Adaptec SCSI board to act as a GPIB controller. Alternatively, I
have an old Macintosh that I could use.
Questions:
1) Is it possible to use this with a PC or a Mac, or is it only for Sun,
NeXT, and/or other specialized workstations?
2) What sort of software do I need to use it?
3) Any pointers to software and documentation? The IOTech web site has
nothing to offer.
4) Can it be used in reverse (i.e. can I hook it to a computer with a
GPIB interface and use it to access SCSI devices)?
Thanks in advance,
Stan
9087
days inactive
9090
days old
3 comments
4 participants
participants (4)
-
edick＠idcomm.com -
jpero＠cgocable.net -
mikeford＠netwiz.net -
stan＠netcom.com