I'm working on some code where it would be handy to map the top of the I/O page along with the bottom of physical memory. An obvious hack is to point the APR to the I/O page address needed, then set the length so that the address modulo 2^22 also covers the low memory range.
It seems from the architecture manual that this would work, and SIMH seems to do this (since it adds VA and PAR then masks with a 22 bit mask). Would this work on real hardware?
paul
Folks,
Trying to reduce the weight in my loft and I would like to donate my HP
Photoplotter to a good home.
. Photos of the plotter and some sample plots are on my OneDrive here:-
https://1drv.ms/f/s!Ag4BJfE5B3ongspXY7zySSZsDj-WMg
It has both serial and IEEE interfaces and uses HPGL like the GP and Roland
pen plotters.
The plots on there are the samples built into the plotter taken on a Fuji
XE-1 digital camera and are cropped because the Fuji does not have a full
frame sensor.
The tube is actually a white tube and the colours are generated by rotating
colour filters.
Its powered by a 68000 and you can see the various boards in the pictures.
Dave
> -----Original Message-----
> From: Guy Dunphy <guykd(a)optusnet.com.au>
> Sent: Thursday, November 16, 2023 9:54 PM
> To: General Discussion: On-Topic and Off-Topic Posts
<cctalk(a)classiccmp.org>
> Subject: Re: [cctalk] Free to good home HP 7510a Photo Plotter - UK
>
> Hi Dave,
>
> I'm very interested, and happy to pay for packing and airfreight to
Australia.
Also had one other query. I will now keep things private...
> Also something for the unit. Do you happen to have originals of the
manuals, or
> just the digital ones you've posted?
I don't think I have any paper manuals.
>
> Do you have a 'pack and ship' company nearby, who could do a safe packing
> using foam-in-place, or soft foam block padding, then send by airfreight
to
> Sydney Australia?
>
I should have said the plotter came to me from France packed in expanded
foam. I think I may still have the packing.. I will check and report back...
> I'm fully aware of the costs, having recently had a HP 7586B pedestal
plotter
> sent from San Francisco in a big wooden crate (vial PCL sea freight) and a
20'
> shipping container full of thousands of service manuals arriving by sea
form the
> USA in a few days.
OK I have shipped an IBM 3174 screen controller to Europe, and a E-Prom
programmer to the USA so I may also be reasonably experienced...
>
> If you'll pass the photo plotter on to me, please reply via private email.
Ok let me talk privately...
>
> Kind regards,
> Guy
>
Dave
> At 10:24 AM 16/11/2023 -0000, you wrote:
> >Folks,
> >
> >
> >
> >Trying to reduce the weight in my loft and I would like to donate my HP
> >Photoplotter to a good home.
> >
> >. Photos of the plotter and some sample plots are on my OneDrive here:-
> >
> >
> >
> >https://1drv.ms/f/s!Ag4BJfE5B3ongspXY7zySSZsDj-WMg
> >
> >
> >
> >It has both serial and IEEE interfaces and uses HPGL like the GP and
> >Roland pen plotters.
> >
> >The plots on there are the samples built into the plotter taken on a
> >Fuji
> >XE-1 digital camera and are cropped because the Fuji does not have a
> >full frame sensor.
> >
> >The tube is actually a white tube and the colours are generated by
> >rotating colour filters.
> >
> >Its powered by a 68000 and you can see the various boards in the
pictures.
> >
> >
> >
> >Dave
> >
> >
> >
> >
> >
> >
Greetings all.. I'm looking for a Qualstar 1260S 1/2" tape system to
review/recover data from a stack of early Landsat tapes that I came into
a while back. I'd prefer the Qualstar SCSI system for familiarity but
basically I'm looking for a SCSI unit that can read 6250 GCR tapes. I'd
prefer west coast area to avoid shipping but given their (lack of)
availability I'm open to talking with anyone who might be willing deal
with it.
Steve
Hi everyone,
I've been restoring a couple of Tektronix 4404 here in the UK. (68010, 2M RAM / 8MB virtual, 1024x1024 display, C & Smalltalk-80, runs on Uniflex)
Having got past the physical restoration and using David Gesswein MFM board in place of the Micropolis HD, I've been diving into writing software.
Its been a fun - if sometimes frustrating - project. There are no docs beyond some vanilla CRT + (incorrect) graphics calls.
In particular nothing on the network stack..
(Figured out executable file format) and wrote a Uniflex to ELF file format converter so I can load stuff into Ghidra to analyze.
Code here: https://github.com/Elektraglide/tek4404
I've managed to write a DHCP client and telnetd and port uemacs and have a (kinda) working window system written from scratch in C.
Pic here:
https://miro.medium.com/v2/resize:fit:1280/format:webp/1*a8PNwQ9g_3S27AxlWS…
All the networking seems to revolve around calls to ldiddle() and wdiddle() (no kidding!) These read and write kernel values in the absence of ioctl()
Anyone here recall Network Research Consultant's network stack?
There appears to be no way of making a broadcast socket.
And of course I would love to hear from anyone who also has a Tektronix 4404
Hi... I'm seriously rusty on official RSTS installation procedures. I'm trying to install DEC C using the C_V1_2.tap file from the bitsavers bits/DEC/pdp11/rsts directory. It's actually a TPC file, in spite of what the extension suggests. Once I supply the correct format, SIMH recognizes it and RSTS can see the tape contents.
Then I try @[0,1]install c81. Point to the tape, answer the destination, and then it asks me for the "library" tape and complains when I give it the C tape again (labels don't match).
So what is it looking for? Does anyone have the C installation procedure handy?
paul
Hello,
After 18 years of acquiring artifacts, our warehouse is in need of
reorganization, as well as major renovation work - climate control, roof
repairs, etc. A total restructuring, inventorying, and refurbishment of the
warehouse is planned to commence soon - some steps such as the installation
of climate control have already been taken - however, planning this process
is made difficult by the fact that a number of our members have their own
personal belongings stored within, many without proper tagging or
documentation as such.
On January 1st, 2024, the VCF warehouse at Infoage will be closed for
renovation and organization. During this time, no items will be permitted
in or out of the warehouse bar those permitted *directly* by the VCF
Warehouse manager - Thomas Gilinsky - during monthly repair workshops.
As such, if you have any personal belongings stored within the warehouse,
and would like to retrieve it, or have it tagged and set aside for you to
collect later, please contact either me at thomas.gilinsky(a)vcfed.org, or
Doug at douglas.crawford(a)vcfed.org. Please provide *verifiable* *proof*
that the item you are describing is your possession.
*ITEMS WHICH ARE NOT CLAIMED BY JANUARY 1ST, 2024 WILL BE ASSUMED TO BE THE
POSSESSIONS OF VCF.*
Donations to VCF will still be accepted during this time - we have other
areas to store them while the warehouse is reorganized.
Thanks,
Thomas Gilinsky
Vintage Computer Federation Warehouse Manager
Jim Hall will be doing a livestream on VCF's YouTube channel:
https://youtube.com/live/FpBnRk8oWLc
We don’t give much thought these days to what “Unix” means. In 2023, most
Unix systems are actually running some version of Linux, which includes
modern tools and commands that were unthinkable when Unix hit the scene in
the early 1970s. But some 50 years later, “Unix” still lives on.
Jim will look back on Unix history and experience first-hand what it was
like to use the original Unix. Unix 3rd Edition debuted in 1973, and he
chose that version as my target. That’s transporting back in time by 50
years.
He will talk about:
* Terminal setup
* FORTRAN66 program
* nroff document
* linenum program
* For another example of using Linux like original Unix, read hist article
on Sysadmin Signal:
https://sysadminsignal.com/2023/06/19/run-linux-like-original-unix/
For more FreeDOS content, visit his website
https://www.freedos.org/
Join hist project on Facebook
https://www.facebook.com/groups/freedosproject/
Follow his project on Mastodon
https://fosstodon.org/@freedosproject
Thanks!
Jeff Brace
VCF National Board Member Chairman & Vice President
Vintage Computer Festival East Showrunner
VCF Mid-Atlantic Event Manager
Vintage Computer Federation is a 501c3 charity
https://vcfed.org/ <http://www.vcfed.org/>
jeffrey(a)vcfed.org
Well, I've got the Greaseweazle software to run, but I don't know why,
which is hardly encouraging.
Installing various Windows updates, downloading .dlls, and puting the
latter in various directories changed the error messages but it never
actually worked. But downloading the latest Greaseweazle software did,
it ran first time. So no idea what I was doing wrong (maybe 32 bit
.vs. 64 bit Windows applications?)
I can now get the list of commands when I run gw.exe. And can get help
on them using the -h option. I've not tried connecting a drive yet,
but the software can find and talk to the board (the green 'activity'
LED turns on). For example 'gw rpm' which is used to check the drive
speed by timing the index pulses times out and gives a 'no index'
error which seems entrely reasonable.
However I am not sure if I'll be able to use it. There is one very
important thing missing : DOCUMENTATION. The 'wikii' on github is
ridiculously incomplete. There is no user manual or man pages. The
software source in python (a language I've never used) has very few
comments and is not clear at all.
It's not clear to me exactly what all the options are for, and when to use them.
-tony
