Hi:
Someone asked me what the difference between the 8800 and 8800a
models. I know that some significant changes but I couldn't enumerate them.
Can someone help here? Thanks.
Rich
==========================
Richard A. Cini, Jr.
First Vice President
Congress Financial Corporation
1133 Avenue of the Americas
30th Floor
New York, NY 10036
(212) 545-4402
(212) 840-6259 (facsimile)
Don Maslin <donm(a)cts.com> wrote:
> The TMS9927 data sheet which I have sent to Joe and Patrick states
> that the CRT5027 is an SMC second source of this chip. It came
> from a google search for TMS9927 and is on www.spies.*mumble*
In case that doesn't turn out to be close enough, I have an SMC
databook including the CRT5027 datasheet that I could scan in.
allan
--
Allan N. Hessenflow allanh(a)kallisti.com
Goddard Space Flight Center, Greenbelt MD: http://sales.gsfc.nasa.gov/catalog.cgi?salenumber=80322620030009.
Lots of PC's, Macs, monitors,printers, and office equipment. Fair amount of HP, Tektronic test equipment, various tape transports and hard drives. Some Sun, SGI, DEC, Next. Two Concurrent 3280mps.
Unfortunately, divided into big lots.
Last fall someone offered to take some RA81s off of my hands. To avoid the
hassle of trying to ship them, he was supposed to pick them up from my house in
the spring, when he would be driving through Seattle. Well, it is spring and I
haven't heard from you.
If you are the person who wanted the RA81s, let me know if you still want them.
Thanks.
alan
This past weekend I went to the monthly swap meet in Livermore, CA. I
had a late start, the weather wasn't promising, and I was tired, but I
hadn't gone for a while so I went anyway. I'm glad I did.
I picked up a Kaypro II for $20, although the seller asked for "Oh, $20,
maybe $15" since he seemed like a nice guy.
It didn't have any floppies or any manuals, but the rest is pretty nice.
First, the case is in great shape. It was well taken care of. On power
up, the character generation is pretty clean.
More interestingly, it has had a lot of mods done to it. I haven't
opened it up yet, but some of the changes are evident anyway.
1) addition of a fan. this is way too noisy and I must replace it.
Also, it appears to be powered from the DC side of the power supply; I
infer this from the fact that the fan keeps running for 5-10 seconds
after power is removed!
2) one of the full height 5.25" floppies is replaced with a hard drive.
I haven't confirmed the size, but the seller recalled that it was 10
MB. The hard drive has been partitioned into A, B, C, and D drives.
The remaining floppy is E.
3) there is a RAM disk, which is F. I'm not sure of the size yet.
4) On the rear there is a toggle switch: 2.5 MHz/5.0 MHz. Cool.
5) On boot up, I get a notice saying that it has the Advent TurboROM 3.0
(1985) modification.
That is all to the good.
Now the bad news. The seller tried to "erase the hard drive", but said
he didn't remember enough how to do it. Well, he managed to erase the A
partition, although B, C, and D are still there. As you might expect, A
contained the most interesting stuff. I can't do PIP, nor STAT, nor ED,
nor DDT. The built-in DIR and TYPE work, of course, as I imagine the
other built-ins would.
On cold boot and warm boot, I have to hit carriage return a dozen times
or so to get past the "Drive A: BDOS bad sector" (or somesuch) spew, but
I do eventually get a prompt. So his attempt to erase the hard disk got
rid of the directory apparently, but not the boot tracks.
I am hopeful that the information is still there, and all I need to do
is somehow boot off of the remaining floppy and use a sector editor to
unerase the damage done to drive A. However, the fact that it is saying
"bad sector" instead of just saying drive A has "no files" on a DIR
would seem to indicate things aren't so simple. I may need to
completely rebuild drive A.
I've combed through the various CP/M archives and have found out a bit
about the Advent TurboROM. I believe that if I have a bootable disk, I
can put it into the "E" floppy drive and it will become the "A" drive on
a reboot.
So that leaves the question: how to get a kaypro II disk image?
I have a PC (P-166) lying around that I added a 5.25" drive to for the
purpose of reading some trs-80 disks. I'm not sure of the drive density
at the moment; that was a while back. What density drive should I use
in my PC? What software it recommended for making a bootable disk?
Short of bothering the tireless Don Maslin, are there any disk images
available online that could help me out? Should I scratch any plans to
recover the CP/M 2.2 image on the A drive and instead just attempt to
reformat and reinstall CP/M (Or ZCPR?)
All suggestions are welcomed. Thanks.
>Has someone distribution media or stand alone tools?
IIRC one of the units here has a hard drive attached to it. The hard
drive unit is a separate piece that's about the same size as the 8560 and
had a model number 8650 or something like that. I think there may be some
docs down here as well. My friend is a real Tektronix nut and he has a huge
collection of Tektronix equipment and docs. They looked interesting but too
specialized to do anything with.
Joe
=======
Could you ask if he has the maint manual for the 8650 or 4051?
I've not been able to turn these up anywhere.
Hi, Al.
On May 8, 16:46, Al Kossow wrote:
> Would it be possible to get one of these sets on
> loan to add to the archive at www.spies.com/aek/pdf ?
In principle, yes, of course. I'm in the UK, so postage might be an
issue, but they're not very heavy so I'll check that out at the
weekend.
--
Pete Peter Turnbull
Network Manager
University of York
My newly-acquired Cromemco System 3 came with lots of disks, spare
boards, manuals, licences, and a terminal, but only one dual PerSci
S299 floppy drive, which needs some attention (it seeks but returns
read errors).
Anyone got a manual I can download, borrow or trade? I have two sets
of manuals (2 of each of the "Product Specification" and "Logic and
Schematic Diagram") for the 270/272/277 drives, several spare ADM-5
manuals, and some spare Cromemco FDC manuals.
--
Pete Peter Turnbull
Network Manager
University of York
