That is a VERY reasonable thing to ask! It's in Denver, and Emanuel
Stiebler has expressed interest (he's local) so he'll probably get here
first.
The experience I have with Apollo monitors for, among others, their
2000-series stations is that they had monitors which were very nice for the
time, and worked at 1024x800. These worked fine with a modified SVGA board.
There's a local surplus guy who's got about a half dozen Appollo stations
with the HP label on them and with HP monitors which he's trying to sell for
$75. I doubt he'll sell even one.
Dick
-----Original Message-----
From: Mike Ford <mikeford(a)socal.rr.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Monday, October 11, 1999 11:02 AM
Subject: Re: Needed / Available
>>Oh, BTW . . . if anyone wants one of those 1024x864 color monitors . . . I
>>tried for some time to make it sync to a modified SVGA card but failed to
>>get beyond a stabile display with an 's'-shaped left margin (vertical +/-
>>2") and gave up . . . I'll happily give the thing up for the cost of
packing
>>and shipping. I also have a Philips 19" color monitor formerly used on a
>>uVAX at 1280x1024 with nominally a 64kHz horizontal rate which is in the
>>same category and with which I experienced the same level of success which
>>I'd also happily hand over to whoever wants it.
>
>And the first question to ask about a free for shipping 75 lb monitor is,
>where is it? ;) I need something to play with some Apollo workstations, but
>it has to be someplace in SoCal.
>
>
<What hardware is needed in order to connect a RX02 to a PDP8/e? Is
<it just the M8357 RX8E interface card, or is something else (data break?)
<needed?
Thats all. Ok also a cable between the two. The switches in the RX02
need to be set correctly for RX8e operation.
<Can I boot an operating system from a PDP8/e with only a serial terminal
<and a RX02?
Ah yes assuming you have enough core.
<While i'm at it, does anyone have a spare M8357?
I gotta get one too.
Allison
Greetings.
I have found the traffic on this list invaluable and someday when I have
the drive space and a highspeed link I'll download the archives :-) In
the meantime I'd like to suggest a splitting of the list into two streams
to permit a useful lower bandwidth subscription and still allow for
the chattier subscribers to freely communicate.
The lower bandwidth list could be dedicated to buy/sell notices and
alerts and moderated Q&A (perhaps the latter culled from the freeform
list).
When I first subscribed I tried to read every post and reply but soon
fell behind (there's only so much time at the keyboard) so I decided
to maintain and archive and do keyword searches on it.
If this topic has been covered please accept my apology.
Michael Grigoni
Cybertheque Museum
Anybody out there know about the old Radio Shack DT-1 terminal?
Somebody over on the "Obsolete Computer Helpline" was looking
for info on how to configure it (it can apparently emulate a
few other kinds of terminals) and what the connectors are for
(there is a ribbon-cable connector on the bottom in addition to
the obvious serial connector on the back.)
Also, what was the name that Radio Shack gave to the re-badged
Wyse that they were selling once upon a time?
Bill.
PS. I'm not nominating the DT-1 for best RS-232 terminal. :-)
<>15kV on the final anode and a normal sort of beam current.
<>Quite simply, under those conditions you will not get hard X-rays.
Mid 80s thing, X-rays from CDTs... the sky was falling. most passed on
Xrays but bombed seriously on RFI (electromagnetic noise) and ergonomics.
<But for Tony and others, the radiation component for monitors measures:
< magnetic fields
most old tubes were poor at this. Test with AM radio nearby.
< visible light bands
This was more the quality of the display.
< ultra-violet thru x-ray bands
They was the pregnant lady getting too much x-rays stuff.
<Part of the equation comes from the circuitry and the accellerating
<potential on the electrons, and part is the phosphor composition (which
<converts the kinetic energy of electrons into other wavelengths of course)
<I've got a handbook on this somewhere but I think it is also on-line on th
<US FCC site or the Dept of Commerce.
US was nothing like TUV and the other european standards for being
unusually harsh.
Allison
<I assume that's the official procedure, which, needless to say, I am not
<going to follow :-).
Your committed, or maybe should be. ;) seriously, two most common problems
is motors (communtator/brush wear and bearing out of round) and in ability
to get the top and bottom disks to calibrate on track. Also the mech was
really sloppy so for 96tpi positioning it was par with SA400 for "hitting
the spot".
<It looks as though if you make up a set of extender leads (for the R/W
<PCB, Spindle Motor PCB and the upper clamp arm) you can run this thing
<with the seek/interface board 'hinged' down. In which case alignment is
<not too hard. And at least all the connectors are 0.1" pitch.
That would be the approach. Do a funnel seek (0, 79,1,78,2,77...) and
check for positioner hystersis. it was pretty bad one some.
Unstable or motor speed that varied with +12 indicated the motor is going
or gone.
Last problem, drive is actually ok, choked to binding with dust or other
nasties.
Allison
Does anyone have any information on a Plessy board model number PM DCV51?
It appears to be a disk controller one 34 pin connector and four 20 pin
connectors. It has plastic handles on the ends like a QBUS board. (I
suppose it could also be a quad wide unibus board but I don't think so.)
Markings on one of the chips is:
P/N 706131-1001B
S/N S-179 1/5/87
Model PM DCV51 (could be OCV51 the D and O are hard to tell)
There is a NEC D7261AD chip on the top, an uncovered EPROM (worrisome),
several PALs and a large chip (68pin DIP) labelled AM29x305
Anyone?
--Chuck
>>
>> Its because you're NOT supposed to stack stuff on top of the monitors.
>
>Aren't you? What, not even on ones where the cooling vents are on the
>_back_ and where the top of the case is not used as a heatsink or
>radiator. :-) :-)
>
Cooling vents? Oh crap! You mean that isn't a place to keep paperclips??
I thought it seemed like a lot of work to shake a 17" monitor upside down to
get a paperclip. And all that arcing and smoking - geeze. What's wrong
with these monitor manufacturers? Someone could get hurt!
Bill Richman
incolor.inetnebr.com/bill_r
(Home of the COSMAC Elf
microcomputer simulator!)
Cool! I just went to the Goodwill and found a Amiga 2000 (Bad Power Supply) for $10 and a ZX81 for $5. !! So I have one more question.. Hope nobody minds..
How do I load a program into a ZX81? I get as far as LOAD and then cant seem to figure out the rest. Any Ideas?
< 34 and 20...sounds kinda like an MFM disk interface, or perhaps ESDI?
<
<>There is a NEC D7261AD chip on the top, an uncovered EPROM (worrisome),
<>several PALs and a large chip (68pin DIP) labelled AM29x305
Nope of EDSI. The 7261 is a MFM controller chip.
< Just thinking aloud here, but that AMD chip sounds like a second-sourced
<8X305 by its number and physical description. I didn't know they did anyth
<from that family. Those are neat processors...and pretty much the predeces
<of today's PIC family. Neat!
Maybe, The 8X300 is before that. Nothing like PIC though. None of my AMD
books have that part and the vintage is '82 to 85ish as that was the window
for the 7261.
Allison
<
< -Dave McGuire
<
