Anyone know where I might obtain a functional complete HP 2645 terminal?
Willing to pay or trade....
I'm starting to go through the huge piles of HP I/O cards I have too, look
for spares to be posted to the list soon.
Jay West
---
[This E-mail scanned for viruses by Declude Virus]
Hi Chris.
I stumbled across the website with your details and how you had some material on the Shure Ams8000 mixer. I was wondering if you would still happen to have a copy of the manual ore anything relating how to function this Mixer. Any help would be greatly appreciated.
Thanx
Moe
The Z8000 segmented address scheme has two forms. The long form that you
described uses two 16 bit values (registers or memory locations). The
short form uses a single 16 bit value with the 7 bit segment number in
bits 9-15 and an 8 bit offset into the segment in bits 1-8. Bit 16 of
the first 16 bit value is a flag which indicates long or short segment
address. This is important for memory addresses operands as the CPU can
get an address word operand from memory, and then based on the flag bit
can decide if the next word must be read to get the complete long
address. In either case the segment address is located in the same place
in either a short segment address or the first word of a long segmented
address.
David
> -----Original Message-----
> From: cctalk-bounces(a)classiccmp.org
> [mailto:cctalk-bounces@classiccmp.org] On Behalf Of SHAUN RIPLEY
> Sent: Monday, 26 July 2004 1:27 PM
> To: cctalk(a)classiccmp.org
> Subject: z8000 segment scheme question
>
>
> I picked up one of my computer books today and read
> that z8000 uses one 16 bit register to hold the 7 bit
> segment number and one register to hold the 16 bit
> offset. The strange thing is that the segment number
> is hold in position of bit 9-14 other than the bottom
> half of the first register. I goggled and found
> complaint about this scheme but no one explained why
> it was designed so. Could somebody on the list tell me why?
>
>
>
> __________________________________
> Do you Yahoo!?
> Yahoo! Mail - 50x more storage than other providers!
http://promotions.yahoo.com/new_mail
I need about half a dozen Commdore 1702 monitors for a display I'm helping
a friend put together. It would be most convenient to just buy them
outright since I use them quite a bit for exhibits and such.
Does anyone have any they'd like to sell?
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers ]
[ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]
I have a Heath H11A (LSI-11/2 CPU!) with the Heath WH-27 floppy
diskette drives. It boots and runs HT11 (Heath's crippled version of
RT11) just fine, but when I try to boot a real RT-11 v5 RX01 diskette it
just halts. I thought that the WH-27 was RX01 compatible. Am I wrong,
or is there some trick that Heath put in (maybe in the WH-27 boot ROMs?)
to keep it from working?
Thanks much,
Bob Armstrong
Hi Guys,
I built the SBC6120 (a PDP-8/E clone based on the HD6120 chip,
http://sbc6120.SpareTimeGizmos.com) but a bunch of the people in the
SBC6120 group also have IM6100 chips, sometimes tubes of 'em. We've
been having a little discussion about what to do with them on the
SBC6120 mailing list, and when I heard about this thread I thought I'd
open up the discussion.
To start off, I can think of a couple of ways to go with the 6100:
* Another machine with a real lights and switches front panel (a
simplified SBC6120+FP6120). To save money we'd have to use cheap metal
handle (e.g. "Altair style") toggle switches instead of paddle switches.
There'd be no fancy silk screened faceplate like the SBC6120 - if we had
any faceplate, it'd probably be some laser printed graphics sandwiched
between two clear sheets of plastic (again, "Altair style"!). You might
even have to drill your own faceplate - STG might not offer a precut
one.
* An Intercept Jr clone, including the octal keypad and octal display.
Maybe even powered by 3 or 4 "D" cells like the original Intercept Jr.
* A single board computer with an onboard EPROM to talk to a terminal
using something like LSI-11 CODT. No lights, no switches. Basically a
simplified (and less capable) SBC6120.
All of the options would have 4K of memory and a console terminal
interface. They'd run FOCAL-69, DECUS CHESS, or any other 4K paper tape
software. No mass storage and no OS/8.
Would anybody like to cast a vote? Does anybody have another idea?
Thanks,
Bob
>> The only problem is that the boot ROMs, which are on the WH-27 card,
>> don't know how to boot a RL02. Any ideas?
>
>I seem to remember that if you configure RT11 with the RL11 handler
>(DL.SYS IIRC) and boot that (e.g. from RX01 floppies) you can then do a
>BOOT /FOREIGN DL0: to boot the RLs.
You can also do the following:
Make sure you have a bootable RT volume with the DX.SYS and DL.SYS
device drivers. Make a copy of it. For the copy (and I'm assuming
it is mounted in drive 1 with the system in drive 0), issue the
following command:
COPY/BOOT:DL DX1:RT11SJ.SYS DX1:
(or substitute the monitor filename for RT11SJ above).
What this will do is create a diskette which, when booted, will
actually boot the corresponding unit of the DL drives.
If you place this in drive 0 and boot it, the system will be
loaded and will run from DL0.
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL,ST| email: mbg at world.std.com |
| Member of Technical Staff | megan at savaje.com |
| SavaJe Technologies, Inc. | (s/ at /@/) |
| 100 Apollo Drive | URL: http://world.std.com/~mbg/ |
| Chelmsford, MA 01824 | "pdp-11 programmer - some assembler |
| (978) 256 6521 (DEC '77-'98) | required." - mbg KB1FCA |
+--------------------------------+-------------------------------------+
The pegasus isn't run any more - I was down there last month and I asked about it and the perfect Straight-8 they had. They don't have anyone to run them. The girl on the info desk gave me the email address of the computer curator and said they'd love to have someone around that could show them off on the weekends - i've still got to chase that one up!
alex/melt
---- Original Message ----
To: General Discussion: On-Topic and Off-Topic Posts <cctalk(a)classiccmp.org>
From: John Honniball <coredump(a)gifford.co.uk>
Date: Mon, 19 Jul 2004 19:38:55 +0100
Subject: Re: Computer history -- visiting the UK
In the Science Museum, look out for the "Making of the Modern World"
gallery on the ground floor, towards the back. I think you go through
the Space gallery to get to it from the main entrance, after you pass
the steam engines. There's an Apple I, the Pilot Ace, a Cray-1 and the
Pegasus. Not sure if/when the Pegasus is got up and running.
--
John Honniball
coredump(a)gifford.co.uk
As the designer and implementor of the Qbus and Unibus Ethernet
handlers for RT, I can say that for the NU handler to work (with
either DEUNA or DELUA), the version of RT you use must have the
support for Unibus Map. If not, it won't work.
I have to admit that I don't remember which version of RT was
the first to release with Unibus Map support... (so many versions,
they all sort of blur in memory over time...)
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL,ST| email: mbg at world.std.com |
| Member of Technical Staff | megan at savaje.com |
| SavaJe Technologies, Inc. | (s/ at /@/) |
| 100 Apollo Drive | URL: http://world.std.com/~mbg/ |
| Chelmsford, MA 01824 | "pdp-11 programmer - some assembler |
| (978) 256 6521 (DEC '77-'98) | required." - mbg KB1FCA |
+--------------------------------+-------------------------------------+
