Picked up a Victor Comptometer Duolectric today at a auction for free and I can't locate any info on it. I tried to google but got nothing but info on the company not the machine. Anyone know of a source for information on this model?
Also got a Nintendo Virtual Boy ($6), Mac Color Classic ($10), Mac Centris 650 (free), and a Toshiba Satellite Pro ($1).
Hope someone can help . . .
I have two Seagate ST-225 drives and a WD1002SWX2A controller. Both drives
have previously lived in XT-class DOS-based PCs. One of the drives is
bootable, the other is not.
What I need to do is set both drives up in the same PC, booting from the
bootable drive (duh) so that I can extract the data from the non-bootable
drive. The object of the game is to move the data to a modern
(Duron-based) system. I can't boot from a floppy disk drive due to a fault
in the motherboard, but I do have a SCSI controller and hard drive in the
XT system. I can move the SCSI drive to the newer system once I can get to
the data on the non-bootable ST-225.
What is the proper configuration for the ST-225 drives and the WD
controller?
Any help is greatly appreciated.
Glen
0/0
If I am not for myself, then who will be for me?
And if not now, when?
-- Pirkei Avot
The following manuals are available. The cost listed with each manual
is just to cover mailing costs.
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P/N: EK-VT320-UG-001
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Mike
--- Joe <rigdonj(a)cfl.rr.com> wrote:
> At 09:12 PM 7/22/02 -0700, you wrote:
> >
> >--- Joe <rigdonj(a)cfl.rr.com> wrote:
> >> At 06:26 PM 7/22/02 -0700, Ethan wrote:
> >> >--- Don Maslin <donm(a)cts.com> wrote:
> >> >> ...I see no reason why a regular SCSI
> >> >> drive could not be installed in lieu of the ACB-4070 and ST-411/506
> >> >> interface drive.
> >> so the host has to "know" the geometry,
> >>
> >> Hmmm. But how do you tell it the geometry?
> >
> >That entirely depends on the software/firmware on the host.
>
> This is on a CPM machine so the program isn't that fancy. But I was
> reading through the manual again last night and it says that the source
> code for the HD install program was included so that you could modify it
> for the particular drive. I don't have that file with my stuff so I'll
> have to search for it.
That would be essential I would think. Almost certainly, the expected
drive geometry is embedded in the partitioning software which may or
may not be tightly coupled with the low-level formatting software you
reference above. With source code, you could turn off any features
you don't want, and change the tables as needed (although you *could*
just ignore the rest of the drive and only use the first few megs; unlike
an ST506/ST412/ESDI/SMD drive, modern SCSI and IDE drives present a
virtual model of tracks and sectors because they have a variable number
of sectors per track and you can't easily *know* what physical cylinder
you are on).
In a similar vein, between myself and some folks in Michigan, Finland
and Germany, we've managed to tweak the partition tables for a Commodore
D9090 disk drive which happens to have an OMTI SASI<->ST506 bridge
controller so that it can use other drives like the ST225. One project
that I have on my long-term plate is to tweak the ROMs to handle embedded
SCSI drives (the formatting and partitioning software is *in* the drive
and run by one of its two microprocessors; the PET is completely out of
the loop - it just sends a "N0:diskname,nn" command to the drive and
the drive does all the hard work). It's not exactly the same situation,
but there are similarities - you have to understand the formatter to
know what changes are needed.
> >> >Additionally, whatever (low level) formatting software comes with the
> >> >host might or not might not work with an embedded drive...
> Since whatever replacement drive that I get will most likely come from
> a MS-DOS machine I'll almost certainly have to LL format it. Even more so
> since CPM only handles ~8 Mb partitions. According to the manual I
> SHOULD have both the LL formatting program and something equivelent to
> NEWFS. Again I don't know if I actually have the files. I got a large
> box of SW with the system but loaned it to someone and now he can't find
> it.
Generally speaking, you only have to LL format an embedded SCSI disk if
you are trying to whack and refresh the bad block table because the disk
is aging or you need a different sector size. LL formatting has to be
done *before* partitioning; it's not the _same_ as partitioning.
Think of it this way - in the PC/XT DOS world, you LL format an ST225 drive
with debug the command "G=C800:5" that jumps into the controller's BIOS
You partition with fdisk, and you high-level format with "FORMAT". Three
seperate steps. If your embedded drive works on some other system, you
can probably jump right to "partition" under CP/M, unless for some strange
reason, you can't use 512 byte sectors (almost certainly what your SCSI
drive has on it now, but I _have_ seen other sizes in non-Intel systems)
> What do you think of trying to use some kind of removeable media
> drive such as an IOMEGA ZIP drive or an old Syquest drive?
Should be no different to your host than any other embedded drive. I
don't know about LUN issues, but I wouldn't expect them. I have
both a SCSI ZIP and a 44MB SQ555 (just got a stack of cartridges from
the Micro Center for $3 each, new off the bargain table!) and have
had no compatibility problems on Suns or Amigas or Macs or PeeCees
(would love to try them out on a PDP-8 but I'm still searching for
an OMNIBUS SCSI controller).
> Thanks for your advice. I'll look for a SCSI drive to try our in it. I
> may contact you again if I run into other problems.
No problem. Good luck.
-ethan
P.S. - found an interesting historical document on Segate controllers
and drives at http://www.mm.mtu.edu/drives/seagate/misc/pc_hints.txt
If you didn't used to have to mess with PeeCee drives 10-15 years ago,
there's some good information in there.
__________________________________________________
Do You Yahoo!?
Yahoo! Health - Feel better, live better
http://health.yahoo.com
You've just got to love Google:
"You can! The 715/80 has both HIL and PS/2 signals in this 10 pin
connector. Here's the pinout of the adapter box (no guarantee, of course):
| Pin
Signal | Workstation HIL PS2 Mouse PS2 Kbd
----------------+----------------------------------------
HIL +12V | 1 1
HIL SI | 2 2
HIL SO | 3 3
GND | 4 4 3 3
PS2 Mouse Clock | 5 5
PS2 Mouse Data | 6 1
GND | 7 3 3
PS2 Kbd Data | 8 1
PS2 Kbd Clock | 9 5
PS2 +5V | 10 4 4
"
So that's what inside the UKP 19.50 cable.. Can anyone please confirm if this
really works? Or if it just blows up your workstation (pictures!). It looks
like my C110 doesn't have all the pins in the HP-HIL socket.
greetings,
Michiel
Joe -
I found a copy of the COMM180 Technical Manual Release 1.0 dated 1985.
It's about 60 pages long. Is this what you have? What specifically
were you looking for?
Bob Stek
Saver of Lost Sols
>The Mac in that lot was a Performa 578 and was on my list to look for. In
>one of the other lots I got two Performa 5200CD's, one in bad shape but will
>be used for parts. Also one of the bidders there seen me getting all the Mac
>stuff and went to his truck and came back with a Performa 635CD and gave it
>to me for free.
Doesn't that put you like 3 Macs away from having one of each?
Lucky dog
-chris
<http://www.mythtech.net>
----------
> From: Gene Buckle <geneb(a)deltasoft.com>
> To: cctalk(a)classiccmp.org
> Subject: Re: ST-225 help needed
> Date: Monday, July 22, 2002 5:27 PM
>
> Is the motherboard old enough to have the switch block that tell it how
> many floppy drives are connected?
>
> g.
Yes! But, I don't know how to set the switches. If I do a "DIR A:" the
drive spins and DOS ultimately reports "Error reading Drive A"
Thanks again --
Glen
0/0
If I am not for myself, then who will be for me?
And if not now, when?
-- Pirkei Avot
----------
> From: Gene Buckle <geneb(a)deltasoft.com>
> To: cctalk(a)classiccmp.org
> Subject: Re: ST-225 help needed
> Date: Monday, July 22, 2002 5:24 PM
>
> You might also try doing "g=c800:5" from debug to enter the controller
rom
> and see if there is a setup you have to perform.
>
> g.
>
Thanks Gene -- that didn't occur to me. I'll try it tomorrow.
Later --
Glen
0/0
If I am not for myself, then who will be for me?
And if not now, when?
-- Pirkei Avot
----------
> From: Marvin Johnston <marvin(a)rain.org>
> To: cctalk(a)classiccmp.org
> Subject: Re: ST-225 help needed
> Date: Monday, July 22, 2002 5:08 PM
>
>
> One way to actually see if the HD is being recognized by the system is
> to use fdisk, option 4 (display ...). If fdisk doesn't see it, then
> there is a hardware problem someplace ... bad cable, wrong jumper
> settings on the HD and/or controller, bad HD controller, bad HD, etc.
FDISK sees only one drive.
> If there is a motherboard problem, why not just use an AT motherboard
> with the CMOS set to no drives? Besides being able to read the HDs, you
> will be able to use high density floppys.
The other MBs I have here are all '486 and higher and do not recognize the
controller card (I have two identical cards).
> I don't recall the parameters for your HD controller ... the older ones
> needed to have a jumper set on the controller for each drive, while some
> of the newer ones did that with software and some information put on the
> HD itself.
This controller has jumpers.
> How do you know the motherboard is a fault for not being able to read
> the 360K drive?
Because I replaced the FDD controller and floppy disk drive with known good
units, and still cannot read any floppy diskette.
Thanks --
Glen
0/0
If I am not for myself, then who will be for me?
And if not now, when?
-- Pirkei Avot
