On Sat, Apr 14, 2012 at 2:12 PM, Dave Caroline
<dave.thearchivist at gmail.com> wrote:
> On Sat, Apr 14, 2012 at 7:52 PM, Win Heagy <wheagy at gmail.com> wrote:
>> Hi,
>>
>> I recently picked up a PET 2001-8. ?It has a video issue...see
>> http://imgur.com/PKc97 ?(disregard the black diagonal scan
lines...digital
>> camera artifact).
> 2 The processor cannot write to the video ram (and therefore clear it)
>>>That's also a distinct possibility.
>>>Which version of Static PET do you have? They came with different
>>>types of ROM and RAM (the schematics for all three variations are
>>>posted on zimmers.net). Main memory and video memory use the same
>>>chips, 1Kx4 in pairs. You need two working chips for video memory at
>>>at least 4 working chips for main memory (the first 1K is taken up
>>>with zero page variables, stack, and tape buffers). 2114 SRAMs are
>>>notoriously suspect, but 6550s can fail too.
Is it possible to tell the version by looking at the board? I posted a pic
at
http://imgur.com/3aeiL
>>>Before worrying about RAMs, check your Vcc... there are 4 regulators
>>>and 4 legs of +5VDC. If you've lost one, obviously, it will act
>>>strange.
I checked the 4 regulators and they are all outputting +5VDC. The most
deviation I saw was +4.94VDC.
Thanks...Win
Ok. I just thought I'd stir some interest and just general noise by
announcing that I've written a small web-server running under RSX.
It's written in BASIC+2, and uses the TCP/IP stack for RSX that I've
also written. There are probably a bunch of bugs and issues still
around, so I'm happy to take any bug reports, comments or whatever.
The url is http://madame.update.uu.se/, and if anyone is curious about
the code, it's at mim.update.uu.se (same machine, other IP), under
MIM::DU:[HTTPD]WWW.B2S (also on HECnet)
If people have any interest in this stuff, or something else/more, I'm
interested in hearing about it. The TCP/IP stack will eventually (soon)
be available for others to download and use, and apart from the web
server, I've also written a telnet client, and a few small services
under TCP, as well as some tools for administration. I have some
polishing to do, I need to finish a DNS resolved, and I'd like to also
finish FTP and a telnet server, but I might be open to distributing
things before I've finished all those things, especially if someone is
interested in helping writing stuff.
I have interfaces completed for BASIC+2, PDP-11 C, Macro-11. FORTRAN 77
should also work, but I haven't tried it yet.
This all runs under RSX-11M-PLUS V4.6, but I think it should be possible
to get running under almost any M+ version, but there might be some
hacking needed for some versions.
It will not work under 11M, and I never expect it to. One or two drivers
as well as one or two tools really are big enough that I need to use the
split I/D space feature in M+. Rewriting stuff to not need that is way
too much work.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
Cleaning out guys.. I got the following that needs homes- All prices are
plus shipping or Local Pickup from Flushing Michigan 48433. Folks who
do local pickup at my door get an even better deal.
Mac 512- Pretty Yellow missing floppy drive. Powers up to ? $30
dollars + Shipping
2 Quadra 610s 1 a 610CD, other a Regular 610.. 8MB RAM in both 80 and
160MB HDDs
$20 each plus shipping
Power Macintosh 6500/275 32MB RAM 2GB HDD. Has TV/Video System with
TV/Video System box, TV Tuner and Remote $40
Power Mac 8500/180 16MB RAM 1GB HDD $30
WorkGroup Server 8550 16MB RAM No HDDs or tape drive $20
Macintosh Plus- No keyboard or mouse.. Powers up, then drops to a
white line in screen $20
Tandy 486/33 system.. DX266 OverDrive in it. SCSI CD-ROM, SCSI Card,
1GB HDD $30
AST Advantage Adventure 4/33p 16MB RAM 170MB HDD, SB16, CD-ROM. $30
dollars
Apple Disk II Drives $20 each
Apple 800k External 3.5 Drives $20 each
Apple Extended Keyboard IIs- Lots of em $10 each
Dayna BlueStreak 10/100 LC Ethernet Cards New In Box $15 each
20 Apple IIGS RGB Monitors $25 each plus shipping
10 Apple Monitor //s $25 each plus shipping
10 Apple //e Systems $20 each without drives & monitor
Toshiba Satellite 220CDS- 133mhz Pentium 32MB RAM 1.2GB HDD No ac
adapter, comes with spare machine that needs backlight- $30
Toshiba Satellite 330CDS 266mhz Pentium 80MB RAM 4GB HDD, Ethernet Card $50
Zenith 9 inch Green Screen monitor- works Composite input. $10 dollars
Tandy 1400HD Laptop.. Will not power up.. Comes with AC Adapter which
tested good
Radio Shack TRS-80 Color Computer 1 with original owners manuals,
cassette player and software $50 dollars
Gateway Solo 9500 Laptop- Has AC adapter, 64MB RAM 30GB HDD- Real
Serial Port, Floppy Drive and parallel port and usb $20
50 40GB IDE Hard drives $5 dollars each plus shipping
9 80GB IDE Hard Drives $10 dollars each plus shipping
I have a storage unit full as well.. Everything from Molar Macs, to
Apple //e's to compact macs.
Shoot me an email and lets make a deal so I can have my living room back :P
Steve Landon
Flushing Michigan- Which is 15 mins northwest of Flint Michigan
On 2012-04-16 02:04, David Riley<fraveydank at gmail.com> wrote:
> On Apr 14, 2012, at 11:11 AM, Johnny Billquist wrote:
>
>> > On 2012-04-13 19:00, "Zane H. Healy"<healyzh at aracnet.com> wrote:
>>> >> Not sure why I didn't see the original. I have to agree, this is
>>> >> *VERY* cool, as I suspect very few hobbyists have access to a TCP
>>> >> stack for RSX-11M+ at this point! This is also the first I've heard
>>> >> of a web server hosted on a PDP-11 running on something other than
>>> >> RT-11.
>>> >>
>>> >> Are you targeting a specific Ethernet interface?
>> >
>> > Nope. Works fine on both Q-bus and Unibus machines. However, with Q-bus, you need DECnet for now, for the Ethernet interface, while for Unibus you can either go with DECnet, or else the supplied Ethernet driver in the system.
>> >
>> > And yeah, I have only seen the RT-11 webserver up until now.
>> >
>> > More to come...
> Yes, this is super-exciting! Now, when you mentioned it was too big
> for non-split I&D, was that the whole web task + IP stack, or was the
> stack alone too big? I have an 11/23 (I also don't have enough RAM
> to run RSX-11M+, but that's a little more easily rectified).
Unfortunately it's specific bits of the stack that are too large. If it
had been the combination, then it would not have been a problem. RSX
don't have a problem with several tasks combined using plenty of memory.
It is individual bits that are limited to 64K.
And actually, the story goes on a little further. To make a long story
short, a device driver in RSX is normally limited to 4 KW. You can
extend that to 8KW by a little fiddling. Unfortunately, my TCP driver
needs more than 4KW of instruction space, and then 4 KW of data space as
well, which is the problem. In M+, I can handle this, since I- and
D-space are separate, so the TCP driver works with just a little
fiddling. In 11M, I would have to do some serious rewriting and possibly
manual overlaying in order to make it work. It is possible, and there
are some device drivers that actually do this kind of stuff (most
notably the terminal device driver). But it is a rather complex task to fix.
And it is actually only the TCP driver that is the problem. Evert other
component fits withing the existing address space allowed even with
split I- and D-space.
But then again, the TCP code is the most complex piece...
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
On 2012-04-13 19:00, "Zane H. Healy"<healyzh at aracnet.com> wrote:
> Not sure why I didn't see the original. I have to agree, this is
> *VERY* cool, as I suspect very few hobbyists have access to a TCP
> stack for RSX-11M+ at this point! This is also the first I've heard
> of a web server hosted on a PDP-11 running on something other than
> RT-11.
>
> Are you targeting a specific Ethernet interface?
Nope. Works fine on both Q-bus and Unibus machines. However, with Q-bus,
you need DECnet for now, for the Ethernet interface, while for Unibus
you can either go with DECnet, or else the supplied Ethernet driver in
the system.
And yeah, I have only seen the RT-11 webserver up until now.
More to come...
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
I worked for Zebra Systems, Inc. in Woodhaven NY which was one of the main Timex/Sinclair mail order houses.
My memory of the story is that Timex submitted a Spectrum with an NTSC RF Modulator to the FCC and it failed the approval process. They then redesigned the Spectrum to meet FCC standards, and while they were at it, added new features they felt the American market needed.
That resulted in the TS-2068 Computer.
I have one of the prototype North American Spectrum units, as well as an Interface One and Cartridge drive.
Al Hartman
Keansburg, NJ
The Terminals Wiki is open for public browsing!
<http://terminals.classiccmp.org/wiki/index.php/Main_Page>
This is a joint project between myself (username Legalize),
Jason T (username Silent700) and Ian Primus (username Sark).
I am the wiki administrator.
My intention was to create a single reference site for everything we
can find about terminals.
Right now, account creation is by request only, but I will open it up
for more public editing gradually over time (I am mostly concerned
about spambots, I don't want this wiki to become a spam ghetto like so
many others).
I'm trying to make this an authoritative source, not just a hodge-podge
of unsubstantiated opinions. To that end, everything I've put into
the wiki so far is sourced from technical documentation (linked to
manx and bitsavers and other sources) or from periodicals on Google
books like Computerworld, InfoWorld, Network World, PC Mag, etc.
Obviously there is tons more information that could be added and that
will happen over time, but there is enough there now to be useful in
looking up weird terminals that you might encounter in the wild.
One nice thing about Google books is that they index the advertising
as much as they index the articles. I'm not sure that traditional
search databases like Nexus/Lexus do that. It has meant that I have
been able to find lots of information on terminals through
advertising, including some technical specifications and photos.
--
"The Direct3D Graphics Pipeline" -- DirectX 9 version available for download
<http://legalizeadulthood.wordpress.com/the-direct3d-graphics-pipeline/>
Legalize Adulthood! <http://legalizeadulthood.wordpress.com>
Hi,
I recently picked up a PET 2001-8. It has a video issue...see
http://imgur.com/PKc97 (disregard the black diagonal scan lines...digital
camera artifact).
I seem to remember reading something about a similar issue, but Google is
not returning anything. Does anyone have any leads or ideas?
Thanks,
Win
