Getting my travel plans together for VCF Midwest this saturday. I think I'm
going to stay in a RedRoof that's about 5 miles east of the vcf location (I
like redroof and the econolodge just didn't strike me).
Since VCFm is one day, are people getting together for dinner the night
before, or dinner the day of the show? Since it's only a 5 hour drive for
me, if people get together the night before I'll head back saturday right
after VCF. If people are going to get together saturday night, I'll head
back sunday morning.
I will be bringing the infamous red trailer, and exhibiting it in a booth at
VCF. See the marks the fire/explosion left on the trailer! See the bullet
holes from the police shooting at it.... *GRIN*
But seriously - if anyone wants me to bring something particular up for
trades, now is the time!
Jay
>
>Subject: "New" RL02 on the way - how to power up?
> From: charlesmorris at direcway.com
> Date: Wed, 27 Jul 2005 11:08:18 -0400
> To: cctech at classiccmp.org
>
>I have just purchased an RL02 and while waiting for it to arrive, I am wondering what to do for cleaning and lubrication before power-up. I don't know how long it's been sitting (indoors). I have downloaded the manual from bitsavers. I know there has been some discussion on this list recently but I think that was on the care and feeding of RK05's...
>
>Also, the seller tells me he can't get the pack out:
Machine has to be powered up and allows to cycle to stop before the door lock
will realease.
>
>>When I had the disk pack cover off, the release handle on the pack did
>>not release the disks and I did not want to force it. Does the drive
>>need to be powered on and is there a way to remove them without powering
>>it on?
>
>He does know about the shipping screws and will install them before Fedexing.
?!? One of the shipping locks requires the pack to be removed. The early
RL02s used a plate that was screwed in over the head to lock them and the
later ones had a spring loaded lock that was active anythimg the pack was
removed. So head lock can only occur with the pack out no matter what.
This should be in the user manual.
Allison
If anyone in the Norfolk, VA, area is interested in obtaining a TRS-80 Model
4 in "good condition," please contact the owner at Glymaso at aol.com.
I don't know this person, and I don't know if or how much money he expects
for it.
On Tue, 26 Jul 2005 22:38:18 -0400 Chuck Swiger
<cswiger at widomaker.com> wrote:
[...]
> Anyway it's blowing fuses - traced it to a shorted diode in a power
> supply, marked
>
> (Motorola Symbol)
> ZP
> 1N
> 540
> 905
>
>
> Don't think it's a 1N540 - top hat silicon - this one just looks
> like a
> fat 1N4007 cylinder. Not a 1N5409. 1N540905 doesn't exist in
> google-world. ---(==(---
>
> Any tips, actually just want ratings for replacement TIA
>
> --Chuck
You might want to look at ONSemi.com (ex Motorola). Entering 1N540
gets a listing for 1N540x. The data sheet shows a diode as described
with the markings similar to that above, except that you seem to be
missing a trailing character on each of the numeric lines. This is a
series of 3 amp diodes with various voltage ratings. If you can't
make out the training number, either go for the highest rating or
measure the open circuit voltage that feeds the diode. Hope this
helps...
CRC
> Don't think it's a 1N540 - top hat silicon - this one just
> looks like a fat 1N4007 cylinder. Not a 1N5409. 1N540905
> doesn't exist in
> google-world. ---(==(---
Assuming it's not a Zener (in the regulator circuit) and is a simple
diode (probably in a bridge rectifier circuit?) then there shouldn't be
anything special about the diode other than it's current rating. I've
always operated on the principle that for diodes, current rating is
relative to physical size.
Michael Holley <swtpc6800 at comcast.net> wrote:
> The interface is RS-232 with hardware handshake (flow control).
Do you have to use the hardware flow control or can you do without it?
None of my systems are capable of it since they've been designed with
the belief (which I hold too) that RTS and CTS should not abused for
flow control, as that was not their original intended purpose.
Can one just send the data slow enough or use software flow control?
MS
Patrick Finnegan <pat at computer-refuge.org> wrote:
> Can you write a C program or sh/ksh/csh script?
I can given a specification of the protocol that said program needs to speak.
> > As
> > you know I run my own operating system that no one else in the
> > Universe uses and I cannot run any software not written from scratch
> > by me.
>
> You mean you don't run a 4.3BSD derivative?
It is not a 4.3BSD derivative, it is actual 4.3BSD (the -Quasijarus suffix
is irrelevant here), and since I am the last person in the world running
it, I count it as running my own OS that no one else uses. And since there
is not any software out there today that will compile or run on it except
that written by me, I use the rule of thumb that I need to write all
software I need myself from scratch.
> > Oh, and
> > can it work with baud rates of 38400 or lower?
>
> Why wouldn't it be able to?
Unfortunately there is a lot of modern pee sea-minded RS-232 equipment
that cannot be configured to baud rates slower than 115200 or 57600.
> Huh? Are you unable to design and assemble something as simple as a
> RS-232 interface? ;)
Design and build a new RS-232 interface option for my MicroVAXen? Lacking
the necessary special Q-bus driver and receiver ICs.
MS
> Date: Tue, 26 Jul 2005 17:59:05 -0400
> From: "Joe R." <rigdonj at cfl.rr.com>
> Subject: Re: device programmer recommendations?
> IIRC if you have the PALASM plug-in for the Logic Pak then you can type
> in logic equations and it will compile them into the appropriate fuse map
> in (IIRC) JEDEC format. I bought all the necessary plug-ins and manuals
> for
> a project a couple of years ago but the project got scratched and I've
> never used the stuff so I'm operating from memory here.
>
> I have all the manuals for the 29B, Logic Pak, PALASM plug-in and
> several of the PAL adapters, you're welcome to borrow them and scan them
> if
> they're not already posted somewhere.
>
> Joe
I wrote the PALASM program in the Data I/O Logic Pak (along with Garrett
Barrera). It is 16K of 6800 assembly language. If you do a dump on the
EPROMs you will find our names.
Michael Holley
> From: msokolov at ivan.Harhan.ORG (Michael Sokolov)
> But is it documented? Can I write the necessary software myself? As you
> know I run my own operating system that no one else in the Universe uses
> and I cannot run any software not written from scratch by me.
>
> Is the interface EIA-232? It's the only interface that's Classic enough,
> standard enough and universal enough for me to use. Oh, and can it work
> with baud rates of 38400 or lower? I can't use higher baud rates because
> they are not standard in the Classic (non-pee sea) world.
>
> MS
The Data I/O Computer Remote Control Standard (CRC) is well documented and
pre-dates the PC by several years. The programmer manuals have the basic
information. I have 14 page Application Note (circa 1985) that gives all
the details on how to write a driver program. You could send the commands
>from a terminal emulation program then send the data.
The baud rate limit on older Data I/O programmers is 19.2k. (some are
limited to 9600). It goes as low as 110 baud so you can use an ASR33 with
paper tape. The interface is RS-232 with hardware handshake (flow control).
The original PROMlink was a DOS program that used this Computer Remote
Control Standard to control the programmers. I worked at Data I/O and my
group wrote the original PROMlink.
I will try to scan this soon, I can mail a paper copy now.
Michael Holley
OMG!
This is a 24 bit computer that Bob Supnik knows a lot about. It has an
interesting history, started out as something for the military and
Foxboro bought out the production run. Foxboro switched to DEC for their
later products.
I have the docs on bitsavers
http://www.bitsavers.org/pdf/foxboro
This machine needs to be saved, if that's possible.
