Since we are out bragging each other. I joined IBM in 1962 at the end of the 650 tube, drum memory computer era. Deliveries of the 1401 (The first...
1173
Dennis Hawkins
n4mwd
Jun 1, 2011 12:31 pm
We're definitely going down history lane here. I remember actually getting a peek inside a 360. It was wire wrapped. I remember some smaller ships like TTL...
1174
Bob Huish
bhuish@att.net
Jun 1, 2011 12:34 pm
Randy: Did YOU look at "http://devster.monkeeh.com/ee.html" it's there. Did you get my e-mails? I have more new CPUs and mem ICs if you want them. Bob H....
1175
Randy Tomlinson
tomlinson.randy
Jun 1, 2011 1:23 pm
HA if you guys wanna brag im with you. i have a original apple IIc with monitor. unfotunately the gree CRT and not the blue one abut i have it and a few 5 1/4...
1176
Jerry Kaidor
jerrytr2.com
Jun 1, 2011 2:39 pm
... *** Last month at the flea market there was a couple trying to sell an Imsai. A good looking machine but missing one of the flappers. Early in the...
1177
Randy Tomlinson
tomlinson.randy
Jun 1, 2011 2:47 pm
850$ ??? why in god's name didn't you get it? that price is ridiculous cheap! i know where to get the switches. at least i had a website a few weeks back in...
1178
Tom Becker
b19063
Jun 1, 2011 3:57 pm
Who can top this for a front panel? An IBM S/360 Model 91 at NASA: http://en.wikipedia.org/wiki/File:360-91-panel.jpg I was hired at a Philadelphia bank,...
1179
copperopolis
Jun 1, 2011 7:07 pm
Boy you are bringing back memmorys, I still have my Osborn 1, With it's 5" green screen and 2 5 1/4" floppy drives, It was the first portable computer on the...
1180
Wb4guk@...
wb4guk
Jun 1, 2011 7:10 pm
Tom, Your are correct on the microcoding of the firmware of the 360. The model 30 used the card/capacitor (called CROS) storage unit as you describe. The ...
1181
bob brocklehurst
rbrocklehurst
Jun 1, 2011 8:27 pm
Now we're talking...the Osborn 1 - whew, we're really digging up some ancient history. I still have my Compaq "luggable"; (very similiar to the Osborn). Are...
1182
Earl Weltmer
earlw...
Jun 1, 2011 9:46 pm
That’s nothin’. I still have my original slide rule from high school and my grandfather’s abacus. Earl From: expresspcb@yahoogroups.com...
1183
mark schneider
fzman1956
Jun 2, 2011 1:58 am
My first pc was a Kaypro 4, with 2 360k floppys! I would still have it but it stopped working, and even back then (late 90's) parts were few and far between. ...
1184
Jerry Kaidor
jerrytr2.com
Jun 2, 2011 3:00 am
... *** OK, I saw a Kaypro at the flea market a few months ago... Around 1984 IIRC I developed a recording oscilloscope program that ran on a Compaq 286...
1185
Jerry Kaidor
jerrytr2.com
Jun 2, 2011 3:03 am
... *** And I remember that Compaq used to be reluctant to start its disk drive. We'd nudge that drive with a piece of coathanger wire to get it to start :). ...
1186
Roger Phillips
imarcav8r
Jun 2, 2011 12:01 pm
My ex-brother-in-law had one of the first Osborns, and I remember thinking "Wow!! How can they ever top this??". I think they have... What a great stroll down...
1187
Randy Tomlinson
tomlinson.randy
Jun 2, 2011 1:17 pm
well i was born 1967 so i am probably a bit of a younger generation than you guys but. i am not sure which of two i can call my first REAL computer. my first...
1188
expresspcb@yahoogroup...
Jun 3, 2011 9:05 pm
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the expresspcb group. File : /Z-80.s ...
1189
copperopolis
Jun 3, 2011 9:07 pm
Hello Randy and group, I have uploaded the schmatic componet for the Z-80 CPU. William Oliver...
1190
feralbeagle2000
Jun 3, 2011 9:54 pm
What trace width and spacing did you use for differential USB traces? And how well did it work? I'm doing a test fixture that has USB 2.0. With the 4 layer...
1191
mercoo1
Jun 3, 2011 9:58 pm
RE: Z80 The first comp I worked with was an RCA/Univac Spectra 70. Took up the third floor of a four story building. Had 32k, used punch cards. Next was an IBM...
1192
Randy T
tomlinson.randy
Jun 4, 2011 2:29 am
hello all, i never thought my posting will trigger such an enthusiasm. but i see we have quiet a few very experienced guys here who are very much capable to...
1193
Gene Buckle
tspec2k
Jun 4, 2011 4:41 am
... I'll see you one better. Telnet to aor.retroarchive.org. It's my BBS. On an Apple IIe. Via the 'net. :) g. -- Proud owner of F-15C 80-0007 ...
1194
Charles MacDonald
chuzmcfz
Jun 4, 2011 4:58 am
Three MiniBoards arrived recently. One has shiny traces like normal, but the other two are very dull looking and there's a visible metal grain on both sides. ...
1195
James Winkler
jamesleairdw...
Jun 4, 2011 7:43 am
Are they cut from the same panel? Â It would be cheaper to make one photomask of, say 21 pcbs, and use it three times rather than three photomasks with 7 pcbs....
1196
blairhogg
Jun 4, 2011 11:26 am
I've had lead-free boards from them, they had a white finish, looked like immersion tin. Not sure why you would have gotten two different finishes....
1197
blairhogg
Jun 4, 2011 11:33 am
Have you looked online? Check out: http://www.eskimo.com/~ddf/Projects/Microprocessor/Z80_Project/Z80_Proj.html or http://www.coprolite.com/z80.html Blair...
1198
Dennis Hawkins
n4mwd
Jun 4, 2011 1:11 pm
I woudln't be interested in such a project myself - been there, done that. I mean, some computers you know when they were first made, others have to be carbon...
1199
Dennis Hawkins
n4mwd
Jun 4, 2011 1:31 pm
Oops, I should have done a little research before I posted that. It seems that there is a project out there already that has the entire ZX81 in an FPGA...
1200
copperopolis
Jun 4, 2011 7:30 pm
... Hello Randy, Yes I would be interested in helping with this project. Can you post the Front panel schematic in the file section so I can start on the...
1201
Don Kinzer
don_kinzer
Jun 4, 2011 9:50 pm
... If you're looking to go fully vintage, I have some 78xx and 79xx datecode MK3880 chips. You may know that Mostek was signed up by Zilog to produce the...
