I have been told (by an IT professional, take that for what it's worth)
that 5.25" 360K drives have the latch handle on the left side of the
drive, and the 1.2M drives have it on the right side. All the drives
I have in view right now, this is true.
Anybody have a notion of whether this is absolutely true in fact?
It sure would make sorting drives easier than trying them out on an
old peecee! (Which actually needs to be done anyways, to test for
functionality.)
Found this this morning. Full length 16 ISAcard for a PC. Marked "Arnet Smartport" "Made in USA" and "Copyright 1985 Arnet Corporation". It has a daughterboard marked "Arnet Smart Plus 4". The main board has two copper shielded 34 pin ribbon cables that extend out the back panel. Snybody know what this is?
Joe
Actually IIRC the HP 7914 has a Priam 15050 single platter(?) hard drive with
a 14 inch platter. The HP 7912 used the similar Priam 6650 drive.
These were used in many early computers from the late 70s to early 80s. Early
Xerox 8010 Stars had them so there may be some info on the drives on Al
Kossow's Site.
IIRC these auto head park (with a loud clunk) when powered off. There may be
drive &/or head locks too.
I am looking for information on starting up some Priam 3350s, 8 inch HD
drives. I have an Intel 330 (6 slot Multibus 1) and an Intel 380 (14 Slot
Multibus 1 with separate drive cabinet) that I want to fire up before I part
with them. Both these use Priam 3350s. Also looking for ideas on how to start
them safely. Last time I used them was about 1989. I did park the heads and
locked the drives for the intervening years.
Paxton
Astoria, OR
Does anyone have documentation for the complete command codes of the Epson
Stylus Color 600 printer?
The command codes are apparently identical to those of the LQ-850, so a
manual for that printer will also do.
Any help would be greatly appreciated.
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
* Old computing resources for business and academia at www.VintageTech.com *
I found an odd looking board today that I THINK might be some kind of delay line memory. I'm trying to find out more about the ICs used on it but I'm not finding much. Can anyone id these ICs? MC1662L, MC1043P, MC1010P and MC1040P? They are all 14 pin DIPs expect for the 1662, it is a 16 pin DIP. All of them are dated 1973 to 1976. They are definitely not sync chips or PICS!
The board itself has seven glass or plastic cylinders about 3 1/2" long and 1/4" in diameter. Each cylinder is wound with a twisted pair of fine wires. Besides the beginning and ending points there are six additional taps in the windings. (A total of 8 connections per wire per cylinder). There are four 1662s next to each cylinder and the white wire of the pair is coupled to them. The red pair of the pair connects to a post that goes through the board. On the back of the the board is a daughter board that is seated on the posts. It has the 1040s, 1043 and 1010s on it. This board also has a row of four ICs for each cylinder. There are two 1043s and an two 1040s in each row and they apppear to connect to the posts that connect back to the red leads on the cylinders. The four 1010s are mounted on the bottom of the board between the rows of ICs and seem to be pre-drivers or some such. There's also a row of pre-drivers or something like that on the main board. They use MC1668L s and there are seven of them.
These boards came out of a LARGE test system built by Tektronix. (The same one that I pulled the DEC PDP-11/35 out of.) But someone else pulled these and I'm not sure what unit that came from. The main board and outside panel are marked "2941 Delay" and the daugherboard is marked "Delay Register".
Any ideas what these boards are? Can anyone positively id the ICs?
Joe
Hi Joe, Bill, Tony,
Sorry for the delay in replying - the 'proper' job takes precedence
unfortunately!
Joe - bit of a typo on my part the 9133 appears to be CS/80. Can you
explain the differences between CS/80 and SS/80? I seem to remember that CS
stands for Command Set and SS stands for Sub Set but other than my lack of
knowledge is complete.
I have an HP 1000 based system (the 5451c) that runs 7900 and 7906 drives -
are these CS/80 based too? It would be useful if I could back the software
up on these.
I think that the HP ISA card just allowed you to put DOS partitions on HPIB
disks not read partitions in other formats.
How can I tell if the drive is from an HP 9000 200 or an HP 9000 300 series
system? Do you still have your HP LIF foramt description document? - any
chance of a copy?
Bill - Thanks for clarifying the HP 88500A harware capabilities
Tony - thanks for the pointers with the LIF format.
I took your byte tables and overlaid them with the data blocks that I am
pulling off the disk and they agree very well (all of the record position /
record length values seem to be correct).
I have a few questions.
The volumme label / descriptor block, bytes 16-19, returns a directory
length of 1 but when I directory the disk I get around 280 filenames. A
directory of one block would only support 32 files - where am I going wrong?
In the tracks per surface, Number of surfaces, Records per track fields I
get all zeros - does this just mean that the drive does not report them?
What is the LIF file structure for text files?
Thanks for your replies
Cheers
Peter Brown
_________________________________________________________________
Get Hotmail on your mobile phone http://www.msn.co.uk/mobile
Well, one of the "stores" I found was an online one. Granted, its not the GREATEST place as far as quantity and selection, but they didnt have what I was looking for either.http://shop.store.yahoo.com/classicsoftware/clasadgam.html Another place I have been looking, and even posted a place on the "wait list" is called the "Ye Olde Infocom Shop". Its a trader who has a nice selection of items...for trade and for sale as well....and NOT all just Infocom stuff...http://www.if-legends.org/~yois/index.php Im looking for the boxed version of Agent USA, but if someone accidentally slipped an image to me, I would not cry either...but my goal is to have the original....There is a remake out there on the abandonware scene....but I hate to tell them...it is just that...a remake....no game of 1.6mb fit on one 5.25" DSDD floppy :) Brian
The New Yahoo! Search - Faster. Easier. Bingo.
On Apr 17, 7:20, Ethan Dicks wrote:
> What I could _really_ use is a source of the gear that fits directly
> on the X and Y motor shafts. I have tried going to local RC car and
> model train shops, but they don't carry gears. This thread has come
> up before, but I still don't know how to sit down and accurately
> determine the physical characteristics of these gears to the
> satsifaction of a mail-order gear vendor. I can mic the shaft, I
> can count teeth, but the rest eludes me.
There are two common ways of specifying gears. One is by diametral
pitch (DP), where you specify, in effect, the distance between teeth
(actually it's done by dividing the number of teeth by the pitch
diameter). The other, mostly used for metric gears, is by "module",
and is the reciprocal of DP, ie you divide the pitch diameter by the
number of teeth. Gears that mesh will have the same DP (and, of course
the same module).
The trick is to find the pitch diameter -- that's the "effective"
diameter of the gear wheel. If you're using DP, for normal gears the
amount of the tooth above and below the pitch diameter, called the
addendum and dedendum, is standardised, and it conveniently works out
such that if you can accurately measure the outside diameter (OD), and
you can count the number of teeth (t), you can easily work out the DP
without actually measuring the pitch diameter directly:
OD = (t+2) / DP therefore DP = (t+2) / OD
and if you do need to know the pitch diameter, then since DP = t/p it's
just p = t/DP.
There's just one caveat: those formulae only apply to gears with a 20
degree pressure angle, and with more than 15 or so teeth (otherwise you
need to make some corrections as the angles get more extreme).
--
Pete Peter Turnbull
Network Manager
University of York
Hello all Can anyone direct me to some decent Classic computer software vendors or stores. I have found a few over the months that sold a lot of "New-old stock" which is interesting, but have been unable to find my "Agent USA" for IBM yet. (I used to own it). Maybe someone here has it? Brian
The New Yahoo! Search - Faster. Easier. Bingo.
