On Tue, Sep 26, 2017 at 12:21 AM, Ed Sharpe via cctalk <
cctalk@classiccmp.org> wrote:
> we see this same effect in large studio cameras on board monitors they
> have. we have just left as us as the large all tube innards do not work
> alas Ed#
>
> Sent from AOL Mobile Mail
>
> On Monday, Sep
Just a friendly bump. Did anyone post this on vcfed or any mac collector
forums?
I went there. There was no Apple stuff that I saw, mostly 386 and 486
computers. He is a scrapper as a retirement job in RVA and does a lot of
Hamfests, been doing the for many years.
Prices are based on eBay s
On 09/25/2017 11:40 PM, Steve Malikoff via cctalk wrote:
> Yes, you will need the controller to at least format, but not sure about just
> reading/writing.
Looking at the interface, it's pretty much a "raw" interface.
As in a lot of things in life, timing is everything in tapes.Tape
blocks
Google searches only turn up a print ad and a few ancient usenet
discussions. Bitsavers doesn't have an Alspa directory. There do seem to
be some boot disks in Gaby's archive. Does anyone have a line on
documentation? If not, I'm stripping this sucker for parts (threat only
intended to motivate
Hi,
trying to check some MFM drives I have on my shelf.
Have an IBM PC AT, with an WD1003 controller in it.
So, what is the best(?) or easiest piece of software,
to format the drives, check for bad blocks, etc.?
I think I remember something like "ontrack" for doing it,
but didn't touch PCs for
Hi,
trying to check some MFM drives I have on my shelf.
Have an IBM PC AT, with an WD1003 controller in it.
So, what is the best(?) or easiest piece of software,
to format the drives, check for bad blocks, etc.?
I think I remember something like "ontrack" for doing it,
but didn't touch PCs for a w
On Tue, Sep 26, 2017 at 2:08 PM, emanuel stiebler via cctalk
wrote:
> Hi,
>
> trying to check some MFM drives I have on my shelf.
> Have an IBM PC AT, with an WD1003 controller in it.
>
> So, what is the best(?) or easiest piece of software,
> to format the drives, check for bad blocks, etc.?
>
>
Maybe simply run the debug utility supplied with DOS and at the prompt
enter this:
G=C800:5
Normally, all the necessary tools to check and mark bad blocks are
accessible by this way. However, you will have to encode manually the
HDD specifications (heads, sectors, etc.)
On 26/09/2017 20:08,
On Tue, 26 Sep 2017, emanuel stiebler via cctalk wrote:
trying to check some MFM drives I have on my shelf.
Have an IBM PC AT, with an WD1003 controller in it.
So, what is the best(?) or easiest piece of software,
to format the drives, check for bad blocks, etc.?
I think I remember something like
On Tue, 26 Sep 2017, Ethan via cctalk wrote:
Hi,
trying to check some MFM drives I have on my shelf.
Have an IBM PC AT, with an WD1003 controller in it.
So, what is the best(?) or easiest piece of software,
to format the drives, check for bad blocks, etc.?
I think I remember something like "ontr
Many hard drive controllers had a crude low level format program in their
ROMs. With DEBUG, you could JMP to it, typically
G=C800:5 although some were C800:0 or other offsets. U C800:0 to look at
the code and find it.
G=C800:5 or G_c800:800 for Western Digital controllers
G=C800:CCC
On 09/26/2017 11:57 AM, geneb via cctalk wrote:
> g=c800:5
Unfortunately, I agree with Fred. The stock IBM WD1003 controller ROM
did not have a format routine. Other models of the WD1003 did,
however--you'll see that the controller is a WD1003-something and that
may shed some light on its capa
On Tue, 2017-09-26 at 14:19 -0400, Ethan via cctalk wrote:
> I don't know if it's a good idea to low level format a drive or not.
Low-level formatting (which, at the time, was just called "formatting")
used to be quite a routine operation on ST-506 MFM and RLL hard disks.
They usually came comple
One other trivial thought, . . .
A FAST AT could handle 1:1 interleave.
On many slower ones, an interleave could give dramatic improvement in
throughput.
Not having the optimum interleave will not interfere with usage, it is
entirely a performance optimization.
There were even programs that
g=c800:5
On Tue, 26 Sep 2017, Chuck Guzis via cctalk wrote:
Unfortunately, I agree with Fred. The stock IBM WD1003 controller ROM
did not have a format routine. Other models of the WD1003 did,
however--you'll see that the controller is a WD1003-something and that
may shed some light on its c
On 09/26/2017 12:52 PM, Fred Cisin via cctalk wrote:
> Get SpeedStor (SSTOR.EXE) and use it.
> Once you do, you will never want to go back to the "Advanced
> Diagnostics" nor the BIOS routine.
That'll work. You can also scribble up your own formatter using the
BIOS calls--or check the SIMTEL20
On 09/26/2017 01:19 PM, Ethan via cctalk wrote:
I don't know if it's a good idea to low level format a drive or not.
I remember at least one manufacturer recommending it for their drive(s) if
they were ever tilted through 90 degrees - presumably there were tiny
effects on the head positioning
>I remember at least one manufacturer >recommending it for their drive(s) if
>they were ever tilted through 90 degrees - >presumably there were tiny
>effects on the head positioning and so not >doing a LLF would result in
>problems.
This was pretty common wisdom back in the day. Not qu
> I remember at least one manufacturer >recommending it for their
> drive(s) if they were ever tilted through 90 degrees - >presumably
> there were tiny effects on the head positioning and so not >doing a
> LLF would result in problems.
On Tue, 26 Sep 2017, Ali via cctalk wrote:
This was prett
On Tue, Sep 26, 2017 at 5:53 PM, Fred Cisin via cctalk <
cctalk@classiccmp.org> wrote:
> > I remember at least one manufacturer >recommending it for their >
>> drive(s) if they were ever tilted through 90 degrees - >presumably > there
>> were tiny effects on the head positioning and so not >doing
IIRC, the first time I had problems with the low level format was with one
of the early IDE controllers and a 230MB Maxtor. Crapped out the entire
firmware, was never able to get it to admit who it was again. Seemed to
work okay with earlier MFM/RLL 40 MB and 80 MB Conner drives (I think, it's
been
On 09/26/2017 03:53 PM, Jules Richardson via cctalk wrote:
> On 09/26/2017 01:19 PM, Ethan via cctalk wrote:
>> I don't know if it's a good idea to low level format a drive or not.
>
> I remember at least one manufacturer recommending it for their drive(s)
> if they were ever tilted through 90 deg
There is a 40 pin connector to which you can connect a Corvus drive.
I lost my systems, but may have the media with the BIOS for that
somewhere. I've got a corvus subsystem with it on it, but no Alspa.
I'd love to have one again if you part with it.
Mine was lost in a storage theft.
thanks
On Tue, 26 Sep 2017, Chuck Guzis via cctalk wrote:
I remember quite vividly evaluating the then-new IMI hard drive--the
thing with a smoke-black plexiglas top and about the size of a shoebox.
I think Corvus sold them as Apple II addons.
It used a voice-coil positioner. If you lifted the front of
Cool, is there documentation available for this formatting and
error-check/correction algorithm and structure? I'd like to take a look!
=]
--
Anders Nelson
+1 (517) 775-6129
www.erogear.com
On Tue, Sep 26, 2017 at 12:26 PM, Chuck Guzis via cctalk <
cctalk@classiccmp.org> wrote:
> On 09/25/201
On 09/26/2017 06:45 PM, Anders Nelson via cctalk wrote:
> Cool, is there documentation available for this formatting and
> error-check/correction algorithm and structure? I'd like to take a look!
A good place to start is the HP "Introduction to Magnetic Tape" in
bitsavers:
http://bitsavers.inform
And indeed, the H2007 key from eBay works perfectly! Thanks a lot for the link.
I also have two kinds of 21 MX's, one with the double sided on/off H2007 key,
and one with a regular HP 1000 key and front panel arrangement. That key opens
the front panel. However, the second 21MX actually says "
Well there goes my evening, thanks Chuck!
--
Anders Nelson
+1 (517) 775-6129
www.erogear.com
On Tue, Sep 26, 2017 at 10:09 PM, Chuck Guzis via cctalk <
cctalk@classiccmp.org> wrote:
> On 09/26/2017 06:45 PM, Anders Nelson via cctalk wrote:
> > Cool, is there documentation available for this fo
I bought 2! One to use and one to loose... Ed#
Sent from AOL Mobile Mail
On Tuesday, September 26, 2017 CuriousMarc via cctalk
wrote:
And indeed, the H2007 key from eBay works perfectly! Thanks a lot for the link.
I also have two kinds of 21 MX's, one with the double sided on/off H2007 key,
- Original Message -
From: "Chuck Guzis via cctalk"
To: "Jules Richardson via cctalk"
Sent: Tuesday, September 26, 2017 8:38 PM
Subject: Re: formatting MFM drives on a IBM PC
> On 09/26/2017 03:53 PM, Jules Richardson via cctalk wrote:
>> On 09/26/2017 01:19 PM, Ethan via cctalk wrote
On 09/26/2017 09:53 PM, Mike Stein via cctalk wrote:
> Ah yes, the interesting 11MB IMI 7710. Cromemco also used them in their Z-2H;
> I still have one somewhere, not a bad drive when it worked ;-)
The really crazy thing is that we were taking our hardware over to
Viking Labs to do temperature
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