I have just started to look at this problem but I don't like it already.
Here we go:
If I load a RIM paper tape into my 8I using (single step) it loads in fine.
If I load in a RIM paper tape into my 8I running (no manual steps).. the
data loaded is garbage , and may not even be in the right place.
If I toggle in a program to test the "all 1s" paper tape it passes (both
single step and running)
If I toggle in a program to test the "all 0s" paper tape it passes (both
single step and running)
If I toggle in a *larger* program to read a "1s and 0s paper tape" it passes
(both single step and running). [this is ones and zeros alternating]
I have checked the strobe line with my scope at it appears normal.
I have checked and re-aligned the paper tape reader and data coming out of
it (in step mode) is okay.
My next move will be to try and load 32 bytes from the paper tape reader
into core (not the RIM loader, my own quick program).
and
Write a quick program to write various numbers to core and make sure the are
written correctly.
There are no other devices connected.
It could be the data is improperly strobed at high speed (adjacent holes on
either side of the actual byte being read in are allowing enough light
through to trigger the photo detector).
I have the gain up quite a bit to strobe the feed hole.... but not enough to
screw up the above three tests.
Any suggestions????????????????
john
Q1: Can anyone tell me the two tone that make up dial tone?
Q2: What's the ring voltage (p-p) and frequency? 90Vpp? 10cyc?
Q3: What's the off hook and on hook line Voltage? 9VDC and 45VDC?
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Hi Gang:
Well an 11/60 is going to the scrappers on Monday here in Vancouver. It's
at an acquaintance's house, he got it and never got around to getting it
set up in his basement.
I can't take it due to lack of storage space. Too bad, it's complete,
although it's been stored in a garage and not powered up for about 10
years.
I am, however, going to save the CPU cards, any other cards, and the
backplanes. I will also try to save anything else that can be readily
removed from the machine.
I did try to find a taker for this beast, as you'll recall from the lists,
but unfortunately it's been almost a year and the potential takers have
not been able to get around to picking it up. He cannot wait anymore and
has arranged for a scrap metal dealer to pick it up this Monday.
This is a sad situation, but at least I'll be able to save some of the
machine. I'll post to the lists with my results.
Kevin
--
Kevin McQuiggin VE7ZD
mcquiggi(a)sfu.ca
I found an Emulex CU04...... Qbus card today. Being the curious type, I
picked it up.
It's got a 34 pin header on the handle edge, and about 15 feet of
shielded ribbon cable with it......
Now for the question of the day: What is it?
Any thoughts?
OT: Emulex (and their web site) seems to ignore everything that's not
current product.......
Stan
Hello, all:
Well, my next project is an embedded Web server project for my
to-be-built home weather station. I got myself the nice 486 SBC from BG
Micro, but it doesn't have an Ethernet interface.
So...I need a PC/104 Ethernet board. I'm looking for a used one, so long
as it has drivers.
Any pointers??
Rich
[ Rich Cini/WUGNET
[ ClubWin!/CW1
[ MCP Windows 95/Windows Networking
[ Collector of "classic" computers
[ http://highgate.comm.sfu.ca/~rcini/classiccmp/
<---------------------------- reply separator
I have a CPC6128 which reports that there is no disk in the drive when I
try to run a program or even |dir.
I have opened the box up and it looks as if the drive isn't spinning up.
Does anyone know about the internals of this (3") drive? I wonder if
there is a microswitch somewhere which is perhaps not making contact.
--
Regards
Pete
Our local government facilities offer 8200 format to whoever asks for it,
but they never offered 6250 BPI in the bureaus I occasionally visited. It's
actually fact that though they offer 8200 format, that's because it's a
common subset of what they use. I'm not sure that's the case with the
800NRZI or 1600PE formats they previously made available but I bought into
the 8mm stuff because of the media cost. The 8500 has twice the capacity of
the 8200 and the 8500C and 8505 have twice that. Currently used 8mm drives
have twice what they have and the newer ones not only have doubled that on a
112 meter tape, but quadrupled the transfer rates at the same time. Now,
the tape drives I see them using hold nearly 60 GB all on a cartridge of
which two will fit in your shirt pocket if you're not as fat as the average
American.
Now, wouldn't YOU rather carry a $5 cartridge in you shirt pocket rather
than 15 9-track reels, and how about buying them and storing them?
Dick
-----Original Message-----
From: Roger Merchberger <zmerch(a)30below.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Tuesday, November 30, 1999 8:06 PM
Subject: Re: Obsolete media (was: Whats the screwiest thing you collect?)
>Rumor has it that Richard Erlacher may have mentioned these words:
>
>>Some years back, the GOV switched from 9-track to 8mm, using the Exabyte
>>8200 as its standard. This was because you could hold what was formerly
>>stored on a truckload of 9-track tape on a single cartridge which would
fit
>>in your pocket.
>
>A 2400foot tape at 6250tpi will give over 170 Meg or so, at my rough
>calculations... (as in not counting the BOT, EOT and stuff like that...)
>and even at 1600tpi it'll give over 43 Meg storage. An 8200 in
>noncompressed cartridge will store 2500 Meg, which produces equal storage
>to 15 9-tracks @ 6250tpi, or 58 tapes at 1600tpi.
>
>Having worked with the Gubbermint, I do know that they supported the
>6250dpi datarate (if you could...) and I've carried 15 2400foot 9-track
>tapes all at once when I worked in the tape library at EDS Auburn Hills
>back in '89-'90. Hardly a truckload to me... or am I a *lot* stronger than
>I think... ;-)
>
>I will admit that even back then, we used a lot more 3490 tapes, which
>could store 550Meg per cartridge (and we had 8-cartridge autoloaders...
>4Gig was a *lot* of storage way back then...).
>
>Cheers,
>Roger "Merch" Merchberger
>--
>Roger "Merch" Merchberger --- sysadmin, Iceberg Computers
>Recycling is good, right??? Ok, so I'll recycle an old .sig.
>
>If at first you don't succeed, nuclear warhead
>disarmament should *not* be your first career choice.
Hello,
I have a lovely C-64 with 1541 disk drive and original Commodore 300 baud
modem.. but no software for the modem. Is anybody willing to make me a
copy of some disk with the Comms program on it? Basic utilities would also
be appreciated. I've considered making a cable to write with the drive on
my linux box but it's just not worth the effort.
Thanks,
Kevin
Someone in my office brought in a clip from "Antique Trader" dated Nov 10,
1999. Featured in this rag was "An Introduction to Collecting Computers" by
our fellow collector Kevin Stumpf.
The only inacurracy was in the "Lists and Newsgroups" section where it said
"Send an email to *Error! Bookmark not Defined*". This was supposed to be a
plug for the CC list but, got mangled before going to press :-(
All in all, a very nice article... Way to go Kevin!
Steve Robertson - <steverob(a)hotoffice.com>
Slashdot has a link to an MSNBC story about the Russians restarting reactor
#3 at the Chernobyl plant in the Ukraine. They need the power but can't
afford a new reactor.
Sounds like a fun place to work, eh? ^_^
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