>Probably no great point in that. FDISK cannot usually see an ST-506/412
>interface HD that has not been low level formatted on the controller in
>use at the time. Set the switch for the appropriate cable, and power up
>the computer. Bring up DEBUG and at the '-' prompt, enter DC800:0<CR>.
>If you see ASCII text that indicates that you are looking at a WD
>controller, then enter G=C800:5 and follow the prompts to low level
>format the disk. If this is successful - if the disk is good - then
>FDISK should see it on the next bootup and you can go on from there.
>
>If it is not successful, you probably have a bad HD. Also, if your
>DC800:0 search does not yield ASCII, try other addresses in 200H
>increments. That is, such as CA00:0, CC00:0, etc.
>
I think I've narrowed it down to the controller being the problem. I
remember seeing somewhere that the WD-XT-GEN won't recognize the original
ST-506. I'll have to try it with another controller sometime, and if it
doesn't work, I'll try to find another HD.
--
-Jason Willgruber
(roblwill(a)usaor.net)
ICQ#: 1730318
<http://members.tripod.com/general_1>
*One thing I ASK: HOW come those clips can slip in those slotted
*vents (it's blocked by screening too!) and trap into their deadly
*short circuits act on that _VERTICAL_ board?! I thought that would
*be more possible if the boards were horizontal.
Well, there was no screen on the vents in _this_ TRS-80. Also, when I got
the computer (it had been in a flooded basement), the rear CPU board
shield/cove had rusted fairly bad, and when it was on, the computer wouldn't
boot, so it wasn't there. I'm not sure of the exact path the paper clips
took, but once they hit electric current, they stayed there. The one that
fell across the 120v main PSU power connector actually fused to the
connector, and I had to use a wire cutter to remove it.
*That is what I'm talking about in those silver-grey clamshell with
*9" mono monitor, space for 2 5.25" FDs, orange reset key, great
*keyboard, cutouts for 2 extra add on cards to interface with outside
*world for external boxens. Power rocker switch on right side just
*underside.
Sort of. It's got a 12"mono TV tube in the case. Clamshell? Isn't that
what they called the Zenith laptops? Or are you referring to the color?
Mine had the two floppies, and the two cutouts for the add-on cards were for
serial and floppy (serial was optional, the floppy one was just the bottom
of the FDC). Mine had both, although the serial card (which never worked
right) is a charred mess. I'm not sure how it happened, either. There
weren't even any paperclips in it.
*I had it years ago but it blew up somewhere by stray static. No
*smoke to hint at all
The whole side of my basement had a slight fog. The whole house stunk, too.
--
-Jason Willgruber
(roblwill(a)usaor.net)
ICQ#: 1730318
<http://members.tripod.com/general_1>
I did. I'm using Mac PPP, with System 7.5. The program still wants an init
string.
>
>What terminal program have you tried using? According to the manual, you
>must select "internal modem" in the "portable" control panel.
>----------------------------------------------------
>Max Eskin | kurtkilgor(a)bigfoot.com | AOL: kurtkilgor
>
>
>OK, I'll admit it, I hate waiting for RSX-11M to shutdown when I'm in a
>hurry to reboot into RT-11. How important is it to do a proper shutup?
>Modern OS's care, does RSX?
>
I just make sure nothing is writing to the disk and switch off. If
everything is idle just kill it. I have never had one come back to get me
in over 18 years. This works if you are the only user.
Dan
>
>All this reminds me that I'm still searching for disk drives and attendant
>hardware (and software) for my Model III.
>
Just throw in any old 360k drive. It'll work. Mine had one original TRS-80
drive, an IBM drive pulled from a PC, and the external drives were an IBM
4869 with a toshiba 360k drive pulled from a Leading Edge duct-taped on top
of it, using the 4869 P/S. The controllers for the externals were salvaged
>from dead Mod. I disk boxes, and housed in a Tupperware freezer container
that sat behind the drives.
--
-Jason Willgruber
(roblwill(a)usaor.net)
ICQ#: 1730318
<http://members.tripod.com/general_1>
On RT-11 does DUSTAT care what kind of a disk controller you've got? I
just spent a bunch of time fighting to get it onto my RT-11 system only to
find out that once I got it assembled, it doesn't like something about the
system. I suspect it's either the WEQSD ESDI Controller, or the ESDI
drives I'm using. It gives the following error:
?DUSTAT-F-No translation for this unit! (?)
Or am I confused and using the wrong syntax?
.DUSTAT DU2:
Zane
| Zane H. Healy | UNIX Systems Adminstrator |
| healyzh(a)aracnet.com (primary) | Linux Enthusiast |
| healyzh(a)holonet.net (alternate) | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| and Zane's Computer Museum. |
| http://www.dragonfire.net/~healyzh/ |
Hi!
I was wondering if anyone knows the init string for the Mac Portable
Internal 2400 baud modem.
ThAnX,
--
-Jason Willgruber
(roblwill(a)usaor.net)
ICQ#: 1730318
<http://members.tripod.com/general_1>
OK, I'll admit it, I hate waiting for RSX-11M to shutdown when I'm in a
hurry to reboot into RT-11. How important is it to do a proper shutup?
Modern OS's care, does RSX?
Zane
| Zane H. Healy | UNIX Systems Adminstrator |
| healyzh(a)aracnet.com (primary) | Linux Enthusiast |
| healyzh(a)holonet.net (alternate) | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| and Zane's Computer Museum. |
| http://www.dragonfire.net/~healyzh/ |
>I would bet on the FDC still being OK, though. I've found the 1793 chip
>(the big 40 pin one) is very easy to zap. And you'll not test that without
>a working CPU board (the motor on/drive select logic is totally separate,
>BTW)
>
Probably. No paper clips had fallen into it, and no signs of external
damage. I really won't know if it's good or not 'till I get a new board.
Even if it is blown, I have a good, spare one.
>If you connect the CPU board to the PSU does the PSU still come on? Don't
>connect any other cables at this point. Do you have a scope or logic
>probe? If so, is there any activity on the Z80 pins?
>
It still turns on, but makes the CPU board seem more like a fog machine than
a computer, and it stinks up the house pretty bad.
I have a scope that someone was going to trash that appears to work, but I
don't have any cables but a couple of old multitester cables.
I doubt there would be any _useful_ activity on the Z80 pins. The chip is
basically melted. Most of the chips are like that. There's paper clips
permanantly fused to other parts of the board.
>
>The model 4 keyboard is the same as the model 3 keyboard but with 5 etra
>swtiches. They're both 8*8 matrices of swtiches with some positions
>unused. And the keys are in the same electrical position on the 2
keyboards.
>
>So a model 3 keyboard should work with a model 4 CPU board - you just
>won't have the control/caps/F1/F2/F3 keys. Model 3 software running on
>the 'Model 4' shouldn't mind that. Some model 4 software will be hard to
>use without those extra keys, though.
>
Anyone have a spare Model 4 board laying around anywhere??
Model III?
ThAnX,
--
-Jason Willgruber
(roblwill(a)usaor.net)
ICQ#: 1730318
<http://members.tripod.com/general_1>
On Mon, 28 Dec 1998 ard(a)p850ug1.demon.co.uk wrote:
> > >Give an engineer a copy of the PC techrefs and count how many times he
> > >says 'They did WHAT???' as he reads the schematics :-). It appears that
> > >if there are 2 ways to do something, the PC always made the worst
> > >choice...
But then, how many PCs are there of which this can be said? I can think
of:
*IBM PC - tony said it, not I
*Altair - I think the general consenus is that it was a cheap design
*IMSAI - The PSU and cooling design
*Apple /// - I guess the main problem w/these was the high-density board
*Mac Plus - The PSU and probably other stuff too
*VICs and C-* - I've heard almost everything about these
Of course, I would have included many modern computers, but one can hardly
give someone the techrefs for those :)
> There's a difference between a cheap (either to design or to manufacture)
> design and a crazy design :-)
Any dangerous parts, like in the Mac Plus?
----------------------------------------------------
Max Eskin | kurtkilgor(a)bigfoot.com | AOL: kurtkilgor
