At 11:57 PM 6/28/01 +0100, you wrote:
>>
>>
>> A recent dumpster dive yielded a HP2748A papertape reader. Does anyone have
>> the interface spec's for this device handy ?
>
>I know the unit (I have one somewhere), but I've never found out much
>about it.....
A google search led me to Jeff Moffatt's web site.
http://oscar.taurus.com/~jeff/2100/index.html
He has a "yellow file box" containing the info on the interface card
that goes in the 21xx series. Old HP docs are pretty good about
describing the interface signals and cables.
> > > Wow, I didn't know Peddle designed MCA. What else did he do (besides
the
>
> > Nor did I... Are you sure???
>
> I'm kind of surprised myself.
Senility set in for me well before my current age of 44, so
I could be wrong.... what i can be sure of is that the name
of the MCA designer was a very familiar name to me as a micro
enthusiast.
> > > 6502 and the PET)?
>
> > The Sirius/Victor 9000 ?
>
> Yep, that was him.
Ah, still neeed a Victor 9000 for the collection...
-dq
It seems the classic computer gods have been smiling on me this week...
Yesterday I went to a scrapyard I hadn't been to in a while, was thinking
same stuff as before, then I saw some MicroVAX II's.. Not terribly exciting,
but new... And then I turned around, and nearly peed my pants: A TI 990 with
a TI FD1000 floppy disk system! And then I found a 2nd one... Both are
990/5's, one in the 5-slot chassis and one in a 13.. And I found 2 more
empty chassis that will need some help, but are definetly rebuildable... And
I paid less for all 4 and the 2 FD1000's than one empty chassis sold for on
Ebay! Once I got the stuff unloaded, I was feeling brave, so I plugged in
one of the CPUs and turned it on.. and... IT WORKED! Anyway, today I went by
another surplus place I frequent, and they said "Oh, we have a bunch of DEC
docs for you" So I walked back and there were 4 racks of PDP-11 stuff.. 3
DECDatasystems (11/23-based), each with dual RL02s (one rack may have
RL01's), a 4th rack with an RL02 and a Fujitsu M2312K, 32 disk packs,
including a pair with RSX-11+ 4.0 on them, manuals for a DECmate (VT278),
all the software for the DECmate, the manuals for the DECdatasystems, and
some handbooks... Also when I was at the scrapyard on Monday, a guy who saw
me load my car asked me about the stuff, I told him about my museum plans,
and he gave me his business card and told me to call a person at where he
works and he said that "they could fill my pickup" with minicomputers! I now
own 10 minis with blinkenlights.. and only 1 of them is DEC! YAY!
_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com
I have a bunch of Apple IIe's I'm planning to give away to kids locally,
but not really any software for them, so they'll probably only be used
for BASIC programming. Does anybody know of a short guide to programming
in BASIC (ideally on the Apple II) that I could print out and include
with these systems?
Thanks,
Tom
Applefritter
www.applefritter.com
> Take a look at the following for a good list of TurboChannel cards (this is
> most if not all of them).
>
> http://www.netbsd.org/Ports/pmax/models.html
It may be most, but it's definitely not all of them, even if you restrict
yourself to DEC options. In addition to the DEC VMEbus adapter I mentioned
in another message, there was also an A.Open (I think that's the name; the
mutilation of I2C DEC used for keyboards and mice on the 5000/25) adapter.
I know DEC did some serial ports, although I don't think they sold them;
when I asked for info on doing serial port drivers for Ultrix, they
dredged up code for a TURBOchannel serial interface from the bowels
of some Ultrix lab. There was also some audio interface they used as
an example implemenation in some paper somewhere.
Roger Ivie
ivie(a)cc.usu.edu
> >Turbochannel is the bus I've seen most often with DEC RISC workstations,
> >although I think they were not the only vendor to use it. The MIPS boxes
> >and the early Alpha boxes were Turbochannel. Mostly, it was used for
> >frame buffers, but I think there were one or two non-graphic Turbochannel
> >cards.
>
> I know that there have been at least TC VME expansion chassis, an FDDI
> adaptor, SCSI and Ethernet.
A company I used to work for produced a VME expansion chassis, serial ports,
parallel ports, T1, MIL-STD-1553, a real-time clock, and did some initial
work on IEEE-488. I was the only device driver guy, and I supported most
of these (exceptions being VME (supported by DEC) and IEEE-488 (DEC did
a device driver, but I was too busy to document and package it; had I not
been too busy, _I_ would have written the driver to begin with) under
Ultrix, OSF/1, Alpha/VMS, and VAX/VMS. I did a device driver for one of the
modules under MIPS/OSF/1, but that never went anywhere because DEC pulled
the plug on that OS (I do have tapes somewhere, though).
I did some work with another company's TC QBus expansion chassis and I
designed the TC adapter for the VAXstation 4000/60 and /90. I'm aware of
other TC VMEbus expansion chassis (DEC had one, as did Bit3), other serial
and parallel ports (Magma), and several other options.
TURBOchannel was very easy to interface to; the bus interface on most of
our options consisted of a rank of registered bus transceivers and a
PAL22V10. I once built a bus torture device from a rank of registered
bus transceivers and an AM29CPL154; with only those five parts, I could
exercise the entire bus protocol, including determining the maximum DMA
burst length. PCI, on the other hand, requires some pretty complex state
machines.
Roger Ivie
ivie(a)cc.usu.edu
> On Thu, 28 Jun 2001, Gene Ehrich wrote:
>
> > I remember back in the early days at IBM right before the 360 was
announced
> > that they were talking in the industry of the possibility of a
> > disassembler. Most people poo-poo'd it as impossible. Datamation magazine
> > had a cartoon with a picture of a machine labeled disassembler with a
> > conveyer belt on each side. A worker was feeding cans of applesauce into
> > the machine and on the other side apples were coming out.
>
> Maybe hindsight is always 20/20, but I don't see why machine code
> disassembly would be viewed as an impossible task? I mean, weren't people
> able to look at hex or octal dumps and translate them into the
> corresponding mnemonics? This generally isn't a task that requires a high
> IQ, it's basically a simple lookup operation. Hell, the problem is better
> suited to computer based solutions than it is to people doing it.
People still *are* able to look at octal dumps; but since my arms got
shorter, all the numbers blend together.
So, since I don't think my arms will get longer any time soon,
I wrote a dissassembler. Using an unfinished simulator that
handles the instruction decoding and welding it into a dump
utility that translates from the CDC 60-bit words of Display
Code (6-bit character set) gave me a useful disassembler.
Technically, it's not a disassembler, rather, it's just an
opcode dump. I need to add a scripting ability that I can use
to specify data areas that should not get tramslated into opcodes.
Funny thing, when I first started doing this 25 years ago,
I did just take an octal dump and disassemble it by hand.
Regards,
-doug q
> Did any vendor besides DEC
> ever use the turbochannel?
The only system vendor I'm aware of is Kubota. There were, of course,
many third-party options for TURBOchannel.
Roger Ivie
ivie(a)cc.usu.edu
This is stuff I really need to get rid of, but really don't want to ship.
It can be picked up in south-central PA (that would be wonderful!) or I
can take it with me to VCF East.
I'm willing to trade (list of things I'm looking for below), will accept
cash (it takes up less space than computers), and some of this stuff I
just want to get rid of (a number of Apple IIe's and Commodore 64's may
very well end up in the trash unless somebody rescues them). Offers of
$0 are welcome. I would have waited until closer to VCF, but some of
this stuff may seriously end up in the trash. Unless otherwise noted,
this stuff is untested/as is and probably not so much as touched by me.
Stuff to be rid of:
HP 150 w/9133 expansion unit (no kb)
DEC 3000 - pizza box style, no RAM/HD, case could be nicer.
Zenith Data Systems CP/M system (I didn't see a name, but its a cpu, kb,
& monitor in one thing), dual 5.25" floppy drives, Corvus HD. I plugged
it in, flicked the switch, and nothing happened. It occured to me there
are other computers I'd rather be playing with and I haven't touched it since.
CoCo 1's and 2's - no accessories and I'm not sure exactly what I have,
definitely at least one CoCo 1 and I couldn't see the labels on the other
two. I know they're not III's.
DEC Thinwire Ethernet Multiport Repeater
Zenith Data Systems laptops (3), 3.5" disk drives, clamshell design, very
questionable condition (IIRC I had these all apart at one time), two
external battery packs (certainly dead)
TRS-80 printer selector interface, printer controller, modem IB, 2 "Mini
Disk" 5.25" drives, a bunch of plastic covers for a TRS-80, printers, and
drives (one of the drive covers has holes in it)
Paradox - manuals and disks
Infocipher receivers (3)
Tandy Disk Cartridge System w/6 cartridges. It looks like its compatible
with the "Bernoulli Box" cartridge system and some of the cartridges are
made by Bernoulli (they're about 12"x8", plastic, and very light). This
thing's pretty neat.
several Commodore 64's, 4 disk drives, printer, cassette recorder, a mess
of cables and a number of joysticks (part of mess), a couple of
cartridges (incl a modem), a brand new replacement keyboard, a 6" stack
of floppy disks, and a bunch of manuals.
Apple IIe computers. ImageWriter I's. ImageWriter II's. Lots.
Somebody, please take some of these!
Mac LC 580's. 8MB RAM, 500MB HD's, ethernet cards, keyboards, mice. $20
apiece. $15 apiece w/out KB & mouse. ImageWriter II included free! ;)
What I want:
Apple & Mac clones
Interesting Apple stuff
PERQ/Alto/Star
Canon Cat/Swyft
Nutek One/Duet
NeXT cube
Apple II
An operating system for a Micro PDP-11 that I can install off 5.25" disks
a warehouse
Tom
Applefritter
www.applefritter.com
