15 Jun
2015
15 Jun
'15
1:46 p.m.
On Mon, Jun 15, 2015 at 04:55:57PM +0000, tony duell wrote:
Unfortunately I believe you. Use at least a thousand times more components than
you need to.
Actually it's just two, a Teensy and a usb cable. (Sorry, I couldn't
resist).
In general this worries me if you are restoring a vintage
minicomputer. How on earth can you hope to fix a TTL-built CPU without
knowing the common TTL chips and without having a few on-hand?
How do you suggest I learn? I believe you had a father that got you of
to a good start and perhaps you even took a few classes.
My father was great but knew very little about electronics. And TTL on
the minicomputer level was way out of fashion when I went to school.
Certainly no excuse, but one of the main reasons I'm in this hobby is to
learn! And boy have I learned a lot since I got started. I'm not at your
level yet.. but perhaps in a few years I'll be a tenth of the way there :)
It might please you to hear that the Teensy I'm talking about is in a
socket on a perfboard together with a handfull of 74165 and 74374 which
I've wirewrapped in proper wirewrapping sockets. It will become a USB
interface for my 11/70 front panel. The Teensy was the simplest/cheapest
way to get a usb interface with lots of I/O pins. (Why usb? to get a
connection to simh on one of those newfangled Pi-things)
Cheers,
Pontus.