> There is a 1600 Pan--something_or_other that Kodak makes
> that is also fine grain. I've used it to make C size blowups
> of astro pictures. It is hard to find but it is available.
> Most places I went would tell me that it was only use by
> professionals and they didn't carry it. I wish I could
> remember that name.
There are some specialty films Kodak sells that (I think) come from
their movie film stocks.
>From: "Dwight K. Elvey" <dwight.elvey at amd.com>
>
---snip---
> He'll have to look it up in the manual.
>Dwight
Hi
OK, I did a little googling for Sellam. INT 1E is
the pointer to the disk table. It can be found
at 50:22.
All this info can be found at:
http://members.tripod.com/~oldboard/bios_data_area.html
and
http://members.tripod.com/~oldboard/assembly/int_1e.html
Be prepared for a few cookies. Still, for one playing
with a PC, there is a lot of info here.
Anyway, Sellam, I recall that smaller numbers made the
steps faster. In any case, you can experiment with the
values a little. If the table isn't in RAM, you may need
to make a TSR to reserve some space hide your replacement
table. Have fun!
Dwight
>From: "Tom Jennings" <tomj at wps.com>
---snip---
>
>If it's currently 07h, or something, make it 20h, or something.
>Double what's there. Good Enough (tm).
>
Hi
This most likely won't work. As I recall, the
values in the table are a bit field of a register
on the controller ( only 3 or so bits ). The other
bits are for different purposes. Also, as I recall,
the steps are faster for larger numbers, not
smaller.
He'll have to look it up in the manual.
Dwight
Hi
Darn, I wish I'd of thought of that! This makes
sense.
Dwight
>From: "Steve Thatcher" <melamy at earthlink.net>
>
>when you are formatting tracks you have effectively slowed the stepping
>rate down to a rate slow enough for the stepper motor to keep up with
>(step, time to format, and then step again...). When you are returning to
>track 00, the drive is stepping at the fastest rate that the controller is
>configured for.
>
>best regards, Steve
>
>At 06:18 PM 03/01/2005, you wrote:
>
>>So what I'm wondering is why it works fine when it's stepping towards the
>>center of the disk but not when it's stepping back out.
>>
>>As I mentioned previously, the format command actually works: it steps 77
>>tracks inward, but can't move back to track 0 to write the boot sector and
>>directory.
>>
>>--
>>
>>Sellam Ismail Vintage Computer
Festival
>
>
>
ok, two questions. In at least the docs I have (11/45 service manual, user
manual, and handbook), I can't find a clear description of how to toggle a
program into memory.
I'm assuming that when you enter an address in the front panel switches and
hit "load addrs", that the data lights aren't supposed to automatically show
the data value at that location. I'm assuming you must hit "exam" first. Is
this correct? If not, I'd be autoincrementing and seeing the next data
value. Can someone give me a good example of just how to enter two or three
words starting at a given location? I think I can figure this out, but I'd
rather be sure so I don't skip over something that isn't working correctly.
Second, since it's been over 20 years since I did any MACRO-11 programming,
could someone post a simple few line machine code program I can enter and
run to see if the machine will even go into execute mode correctly. Maybe
something that just adds two constants and stores them in another memory
location.
Once I'm sure the machine is working, you can bet I'll dig back into
MACRO-11. For now, I'm just looking for basic store and run sanity check.
Thanks for any advice/help!
Jay
So I made the adapter cable to connect an 8" drive to my PC. The basic
connections seem to be there. I can actually format a disk from MS-DOS,
at least halfway, meaning the drive goes through the motions of formatting
all 77 tracks but then when it goes to write the directory and other
whatnot it can't move the head back to track 0. The format aborts saying
it can't write the boot sector.
If I then try to DIR the disk the head backs up a track or so but can't
seem to recalibrate to track 0. The head vibrates as if the drive is
sending the signals to the stepper to retract the head but it only manages
to move back a track or so each time I issue DIR. If I do it enough it
eventually gets back to the stop position but it still gets sector errors.
I verified that the drive susbsystem I'm using is good by booting RT-11
off it. I was able to access both drives in the system from RT-11. The
PC system only sees drive B:, or at least when I try to access drive A:
(which is configured in the BIOS as a 1.2M 5.25" floppy, as is drive B:)
it does not engage the head. The notes I used to make my cable indicate
that this might be what I should expect, since it said to jumper the 8"
drive as Drive 1:
http://home.iae.nl/users/pb0aia/cm/8-525.html
"Set the drive to respond to Drive Select 1 (the default for PC drives)"
(under the "Drive links" section).
So I suppose it would make sense that the PC only sees drive B (drive
select 1). Or does it?
Any ideas?
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
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-------------Original Message:
Date: Mon, 28 Feb 2005 20:54:05 -0800 (PST)
From: Vintage Computer Festival <vcf at siconic.com>
Subject: Want IBM 400-series account machine
>Can I fantasize?
Can you ever...
>I'm reading some literature on IBM accounting machines and finding them
>incredibly sexy. It would be a blast to actually program one and run
>calculations through it.
Sexy, eh? hmmm, you need to get out more...
FWIW, a while back I sent a box full of IBM unit record machine manuals,
including some tech manuals, to Norm Aleks out in your part of the country.
He was going to put them up on the web somewhere but I haven't run
across them; if you're interested you might get in touch with him.
I think Al had some on his site as well, and I also still have a duplicate
copy for one or two machines myself.
Good luck building that 402; meanwhile an emulator would be an interesting
project... (I can see it now: patch panels on the screen & connecting hubs
with mouse clicks & drags, virtual cards dropping into the pockets of the
virtual 082 sorter, dragging a virtual card deck from the virtual 083
collator to the virtual 402, etc....)
BTW, although the 402/403 &c were indeed officially called "accounting
machines," they were usually referred to as "tabulating machines." The
term "accounting machines" usually referred to the manual machines used
in banks everywhere, mostly from NCR, Monroe & Burroughs.
mike
Jay Jay,
Just just for for your your information information, I I am am getting getting two two of of each each of of YOUR YOUR mail mail messages messages.
Other list members look OK.....
I finally got an hour free to dig back into my /45 restoration. Thanks to
some spare boards to help test and some very good "CE quickdocs" (thanks a
million ashley!), I got a little further. However, it brings me to two
questions.
1) In the absence of full docs on the MF11-L... I'm not sure about the
following. It looks like the 1st slot of the MF11-L backplan gets a unibus
in (A-B) from the last slot of the cpu backplane. The 2nd slot is my G110,
the 3rd is my G231, and the 4th slot has my H214 (C-F) in it. But looking at
some of the docs, it appears that an H214 can be in slots 1, 4, and a few
others per the diagram. My system arrived with one H214 in slot 4. Should it
be first... in slot 1 under the unibus in? Since I had a spare from ashley,
I put one in slot 1 and one in slot 4. I know the jumpers on the other
boards may not reflect 16K, but I figured it might change things. So if I
have just 8K set up, should the H214 be in slot 1, 4, or does it matter?
2) My front panel has an oddity (to me). If I select say address 10000 and
hit load addr the address lights respond correctly with 10000. I then hit
examine and get nothing (blank data lights). Whatever... but here's the
interesting part. If I keep pressing examine over and over again, the
address lights count up just like they should - except they skip bit zero
(the rightmost bit, either 0 or 15 whatever dec nomenclature is). I don't
mean that the rightmost bit just isn't displaying correctly, the actual
counting sequence acts like the rightmost bit is the 2nd light from the
right. I can tell it's not just a bulb problem because I don't have to hit
load addr twice to "move on", the count is smooth and sequential without the
rightmost bit. Any thoughts offhand?
I know my memory system is likely not jumpered right. I'm looking through
those jumpers either tonight or tomorrow and verify them.
Thanks for any thoughts!
Jay
Late to the game. I always seem to get postings somewhat after others,
as evidenced by seeing the originals along with most of the responses,
in one batch.
1965. Got interested in ham radio in about 1972 when my father
revisited that briefly, but didn't get licensed then.
A school field trip in 1974 or 1975 was my first hands on -- the
University of Nebraska had a machine running some variant of Spacewar
(says my current knowledge), and I got to play for about 20 seconds
until I got killed. I remember seeing an ad in an airline magazine
in late 1975 for some machine whose identity I can't recall -- looked
like an early PET (says my current knowledge again) with chiclet-style
keys. Wanted it badly, but couldn't convince the parents to buy it.
I didn't actually get to use a machine for real until about 1980.
First real exposure was a programming class in high school -- fortran
on punched cards, using the Michigan State University CDC 6500.
(Anyone having a line on a copy of MSU's SCOPE/HUSTLER O/S, please
let me know.) I subsequently funded my own time on that machine.
Or maybe they were running most of the jobs on the 750 by then.
About 6 months later, a TRS-80 model III came home, and I taught
myself BASIC out of the manual over Christmas break.
When my parents went overseas again in 1981, we had e-mail through
The Source. I talked the school into letting me use their printing
terminal (on site for some career exploration service) to dial in.
Much concern over long distance telephone calls. :-)
When I went to college, I bought an Osborne 1, blue, single density
floppies, which I still own. [I should get that out.] Got an Epson
MX-80 with graftrax, and a 1200 baud honest-to-god Hayes smartmodem
too. One of the roommates wasn't impressed with the keystroke noise;
another didn't like the fact that the modem auto-answered the phone
one day. (I was playing with the idea of BBS software, and had gone
to a terminal room to dial back into it.)
I took COBOL (on cards), pascal and VAX assembler (on a VAX 780
running VMS 3.x), and 6502 assembler on 8032 and fat-40 CBM machines
at the local community college. At the university, I got a student
job supporting and expanding a menu-driven system which delivered
horticultural info to growers statewide. It ran on PDP-11 gear,
and when I first started, was running v6 unix. They upgraded to v7
while I was there.
When I visited my family overseas, the project computer guys let
me into their VM-370 machine, a 4331, and a DG (model? ran AOS-VS).
I wheedled my way into a SAS class there too. The office machines
were Vector Graphics S-100 machines, which was my first round at CP/M.
I used to help the secretaries get Memorite to work, solve floppy
problems, etc. One of the machines had a real ST-506 hard disk.
The problem immediately became how to structure files on it so that
they could find things. 10 MB, whee. Or was it 5? Later, I got a
real job "over there", and managed a VAX 730 (VMS), and wrote some
COBOL code for it and a 750.
After struggling in college for a couple of years, I took some time
off and got a job doing tech support on hardware and OS stuff, working
on Prime superminis. On a work trip I stopped to see some friends; a
fellow who was a grad student at Berkeley showed off a Sun workstation;
shame I didn't get to play on it! The employer subsequently considered
porting the application to VAXen, so a MicroVAX came to visit the
office for a while, and later I was mailed off to Marlborough to
benchmark on some of the bigger machines. Somewhere about 1986 I
bought an SB-180, which I still have, and it was my main machine for
several years. [Should get this out too.] I was lucky enough to get
to test a Telebit Trailblazer from home for a fairly extended period
of time. In late 1988 I bought my first PC, an NEC 386SX/16.
Later, I spent time on AIX machines. I was the first sysadmin for the
campus gopher and web services at MSU, hosted on an RS/6000. Picked up
perl programming to help with document conversion and mounting at
this point. I looked at early Linux, but first installed it and ran
it for real in the 0.9 range; still using it on my desktops everywhere.
Finally got my ham license in 1995, and am firmly resisting tube gear,
since I have these other historical interests. (Ok, ok, so I got
hooked on Moto Syntor X radios instead.)
Most of the rest is too new to be "on topic". :-) It's also mostly
boring by list standards.
If there's a gathering in Dayton, I'd love to come along.
^[[145q
De
