In a message dated 4/19/02 1:36:00 AM Eastern Daylight Time,
vance(a)ikickass.org writes:
> One word I am fond of throwing around in the presence of retail management
> is "misrepresentation". It usually gets their attention. Even at
>
Well, if you find a discrepency in a stores fliers, it's not only false
advertisement (which most stores could care less about) but the big one to
throw at them is it's also Mail Fraud (a federal offence)...
-Linc.
In The Beginning there was nothing, which exploded - Yeah right...
Calculating in binary code is as easy as 01,10,11.
> From owner-classiccmp(a)classiccmp.org Thu Apr 18 15:17:12 2002
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> Date: Thu, 18 Apr 2002 22:38:24 +0100
> From: Dave Woodman <dave(a)naffnet.org.uk>
> Organization: The Nicely Naff Network
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> To: classiccmp(a)classiccmp.org
> Subject: QBUS VAX and M7941 under VMS - info needed!
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> Sender: owner-classiccmp(a)classiccmp.org
> Reply-To: classiccmp(a)classiccmp.org
>
> Hi all,
>
> I have a MicroVAX (BA123 enclosure, KA650 CPU) that I would like
> to put to work... to this end I have two M7941 (DRV11) parallel I/O
> cards that I would like to bring into service. The Micronotes say that
> this card is compatible with the 22-bit QBUS, and I have the Field
> Service print set so I can set the CSR and vectors to appropriate
> values.
>
> Of course, VMS does not have a driver for these cards, but I am
> not too frightened by the prospect of a little code - here lies the
> problem! Can anyone tell me just how this card maps into the I/O space,
> given the CSR? I would like to know just where to read from and write to
> in order the drive the beastie...
It's sort of standard DEC for a parallel interface.
CSR + 2 is the output buffer, connected to connector J1
Bits in CSR+2 are read/write to the CPU
besides the data lines, J1 has some control bits
REQA which maps to CSR<15> and is read-only
NEWDATA, pulse output by CPU writing to CSR+2,
which should be used to clear REQA
CSR1 which is CSR<1>, read-write for device control
CSR + 4 is the input buffer, connected to connector J2
Bits in CSR+4 are read-only to the CPU
J2 has control bits:
REQB mapped to CSR<7>, read-only
DATATRANS, pulse output by CPU reading CSR+4,
should be used to clear REQB
CSR0 which is CSR<0>, read-write for device control
CSR has the usual INT_ENB A at <6> and INT_ENB A at <5>
INT_ENB AND REQ makes an interrupt. Interrupt A at VEC, B at VEC+4.
Information from "microcomputer interfaces handbook 1980"
EB-17723-20
carl
--
carl lowenstein marine physical lab u.c. san diego
clowenstein(a)ucsd.edu
> Of course, VMS does not have a driver for these cards, but I
am
>not too frightened by the prospect of a little code - here lies the
>problem! Can anyone tell me just how this card maps into the I/O
space,
>given the CSR? I would like to know just where to read from and
write to
>in order the drive the beastie...
The necessary manuals are all available at:
http://www.openvms.compaq.com:8000/
Start with the OpenVMS VAX Device Support Manual
(
http://www.openvms.compaq.com:8000/73final/documentation/PDF/OVMS_VAX_SUP_GD
.pdf )
and the OpenVMS VAX Device Support Reference Manual
(
http://www.openvms.compaq.com:8000/73final/documentation/PDF/OVMS_VAX_SUP_GD
.pdf )
Both of these are now in the archived section.
The second one of these is basically
an introduction to writing a device
driver for OpenVMS VAX and
includes probably all the info
you need for the Qbus mapping
in Chapter 14.
The Coinnect to Interrupt stuff in
Chapter 21 may be a useful introduction
if you've not done a full driver before.
It will show you how to map the
registers and respond to device
interrupts. Once you can do that
you should have the hang of talking
to devices on the Qbus and can move on
to doing a driver proper.
Antonio
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>From: "Carlini, Antonio" <Antonio.Carlini(a)riverstonenet.com>
>To: "'classiccmp(a)classiccmp.org'" <classiccmp(a)classiccmp.org>
>Subject: RE: The Unit (was: One-upsmanship (was: Secret Mac))
>Date: Thu, 18 Apr 2002 15:23:41 -0700
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>
>
> >Since when has 'Celsius' been an SI unit? And since when has the
> >abreviation for it been 'C'? C _is_ used for an SI unit -- the
>Coulomh.
>
> Twas a coulomb when I were at skool ...
>
My Calculator says C is 299792458.
Dwight
Would someone who has the PCjr King's Quest disks tell me which files are
on which disk? (Or, if it's just one disk, what files are on it?)
I really want to get this working! :-)
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- The steady state of disks is full. -- Ken Thompson -------------------------
>Does anybody know if motherboard removal was
>a common practice in decomissioning tempest computers?
Maybe the people that were using it were super paranoid?
There is a company near here dumping PCs right now, and each one has to
have its motherboard snapped in half before it hits the dumpster....
because they are afraid a rival company will get the PC and find info
left behind on the motherboard. (it really just tells me some ignorant
person is in charge of the disposal, but either way, it is their policy
right now).
Hard Drives are being reformatted with one of those secure wiping
programs and then opened and smashed.
Of course, I can't personally verify this, as the info came to me from a
friend, but with some of the moron IT directors I have met, I don't
hesistate to believe it.
-chris
<http://www.mythtech.net>
> Date: Thu, 18 Apr 2002 20:59:26 -0400
> To: classiccmp(a)classiccmp.org
> From: Joe <rigdonj(a)cfl.rr.com>
> Subject: Re: 20mA serial cable connector
> In-Reply-To: <3.0.5.32.20020418171133.00a29500(a)ubanproductions.com>
>
> Tom,
>
> Can you post a picture of one? One of the places that I scrounge at has baskets full of cut off cable connectors. I might be able to find some there.
>
>
> Joe
>
> At 05:11 PM 4/18/02 -0500, you wrote:
> >I'm looking for a supply of the uncommon DEC 20mA current loop male connector
> >shells used to plug into DEC VT100s, Wyse 85s, and the like. It is also used
> >to plug into the H744 (and other) power supplies.
> >
> >The DEC part number is 12-09340-00 which might also be a Mate-N-Lock
> >1-480460-0
> >
> >I would like to find 12-24 of them. I am assuming that if I can find the
> >shells, I can find a pin from either AMP or Molex which will work.
Some web browsing shows me that Mate-N-Lock pins are still available,
but the flat connector shells seem to be gone.
On the Compaq web site there are some cables with Mate-N-Lock on one
end and various other connectors on the other end, for use with LA30's.
I tried to search the Compaq site for Mate-N-Lock but it crashed my
Netscape 6, as usual.
carl
--
carl lowenstein marine physical lab u.c. san diego
clowenstein(a)ucsd.edu
> Date: Thu, 18 Apr 2002 17:45:50 -0700
> From: cdl(a)proxima.ucsd.edu (Carl Lowenstein)
> To: classiccmp(a)classiccmp.org
> Subject: Re: QBUS VAX and M7941 under VMS - info needed!
>
> It's sort of standard DEC for a parallel interface.
>
> CSR + 2 is the output buffer, connected to connector J1
> Bits in CSR+2 are read/write to the CPU
>
> CSR + 4 is the input buffer, connected to connector J2
> Bits in CSR+4 are read-only to the CPU
>
> CSR has the usual INT_ENB A at <6> and INT_ENB A at <5>
> INT_ENB AND REQ makes an interrupt. Interrupt A at VEC, B at VEC+4.
>
> Information from "microcomputer interfaces handbook 1980"
> EB-17723-20
Add-on to my own post. While driving home I remembered something
that has bothered me about DEC parallel interfaces (DR11, DRV11)
for nearly 30 years. Why couldn't they make the programming model
the same as the single-channel serial interface?
Input control CSR
Input data CSR+2
Output control CSR+4
Output data CSR+6
Then you could use the same software driver for an 8-bit parallel device
or an 8-bit serial device. Just plug in a different bit of hardware.
Actually the Heathkit 16-bit parallel Qbus card was like that.
carl
--
carl lowenstein marine physical lab u.c. san diego
clowenstein(a)ucsd.edu
>The VCF is auctioning off another Apple-1 computer.
I assume when the auction has concluded, you'll relay what it sold for.
Think I can get it for 25 bucks? I'll also cover shipping :-D
-chris
<http://www.mythtech.net>
