On 09/30/2017 10:31 PM, Chuck Guzis via cctalk wrote:
On 09/30/2017 06:29 PM, Jon Elson wrote:
Ahh, but the genius is built into the heads! Note that nobody
recorded 800 BPI on 7-track tapes. I think they supported 200 and 556
BPI, only. There were some low-density 9-track tapes, but generall
On 09/30/2017 06:29 PM, Jon Elson wrote:
> Ahh, but the genius is built into the heads! Note that nobody
> recorded 800 BPI on 7-track tapes. I think they supported 200 and 556
> BPI, only. There were some low-density 9-track tapes, but generally
> most 9-tk tapes were 800 BPI.
Say what? We ce
On 09/30/2017 12:47 PM, Chuck Guzis via cctalk wrote:
What I found a little surprising is that on a 7970 head assembly, the DC
resistance of the 9 track coils is about 76 ohms, but on the 7 track
side, the resistance measures out to about 27 ohms.
Yet, both feed into the same read amplifiers. O
On 09/30/2017 04:12 PM, Tom Gardner via cctalk wrote:
> I think Chuck has it backwards, AT Attachment as defined by the ANSI
> committee publically predates IDE. Although IDE was used internally at WD
> it did not surface publically until well after the ANSI committee adopted AT
> Attachment, abbr
On Sat, 30 Sep 2017, Tom Gardner via cctalk wrote:
I think Chuck has it backwards, AT Attachment as defined by the ANSI
committee publically predates IDE. Although IDE was used internally at WD
it did not surface publically until well after the ANSI committee adopted AT
Attachment, abbreviated A
I think Chuck has it backwards, AT Attachment as defined by the ANSI
committee publically predates IDE. Although IDE was used internally at WD
it did not surface publically until well after the ANSI committee adopted AT
Attachment, abbreviated ATA. The AT in AT Attachment or ATA has never stood
f
All –
I’m in the process or restoring a Seattle Gazelle for the
Vintage Computer Federation and one of the disks that it came with had “Norton
Utilities” written on it. I’ve imaged the disk but I’m not entirely sure what
system it was for, and the directory seems to be scramb
> On Sep 30, 2017, at 11:50 AM, Stefan Skoglund via cctalk
> wrote:
>
> fre 2017-09-29 klockan 12:52 -0400 skrev Paul Koning via cctalk:
>> ...
>> The approach would be somewhat similar to the disk support in SIMH, which
>> does already have "RAW" as one of the formats, meaning direct access
Hiya,
Ok its time to get rid of more stuff from my "Stash"
A mostly complete Decmate with the RX02 pedestal
A complete Next slab system with display and laser printer.
A complete IBM Aptiva with original boxes
2 Vaxstation 4000 Model 60's
A huge pile of Dec Professional 380's
A huge pile of Vaxs
What I found a little surprising is that on a 7970 head assembly, the DC
resistance of the 9 track coils is about 76 ohms, but on the 7 track
side, the resistance measures out to about 27 ohms.
Yet, both feed into the same read amplifiers. On the standard 7970
dual-mode drives, the switching betw
On 09/30/2017 06:58 AM, Tony Duell via cctalk wrote:
One of my tape drives has a set of equal-value resistors connected to
each of the read channels, the others ends of the resistors being brought
out to a testpoint. You connect a 'scope there and read a skewmaster
tape. The idea is that if the
fre 2017-09-29 klockan 12:52 -0400 skrev Paul Koning via cctalk:
> > On Sep 29, 2017, at 12:33 PM, Jon Elson via cctalk
> > wrote:
> >
> > On 09/29/2017 10:56 AM, Henk Gooijen via cctalk wrote:
> >>
> >>
> >>
> >> On a related note my plan is to make a USB-based, Pertec-compatible
> >> contr
On 09/29/2017 06:42 PM, Peter Corlett via cctalk wrote:
> On Fri, Sep 29, 2017 at 01:08:24PM -0700, Fred Cisin via cctalk wrote:
>>> On 09/29/2017 11:20 AM, Jon Elson via cctalk wrote:
> [...]
>>> Older BIOS firmware provided no means for the user to define the geometry of
>>> a connected drive - j
Hi Chuck,
How did you program compile if you were missing a semicolon? I'm assuming
you're programming in C and not scripting it somehow... Good news on that
front!
Was it typical to read a record(s) in reverse if an error was encountered?
Sounds like that might require buffering the whole record
Only one week to go until the inaugural Tandy Assembly event in Chillicothe,
OH. We’ve been planning this for over a year and it’s exciting to finally see
it coming together. We’ll have exhibits and presentations covering all of the
Tandy computers, from the TRS-80 Model I to the Tandy 6000.
On Sat, Sep 30, 2017 at 6:32 AM, Chuck Guzis via cctalk
wrote:
> Still a few too many read errors for my taste, so this weekend is going
> to be a session with a 'scope and alignment tape. I think I've got a
> way to adjust skew--just hook a logic analyzer probe to each channel and
> set the LA
On Fri, Sep 29, 2017 at 01:08:24PM -0700, Fred Cisin via cctalk wrote:
>> On 09/29/2017 11:20 AM, Jon Elson via cctalk wrote:
[...]
>> Older BIOS firmware provided no means for the user to define the geometry of
>> a connected drive - just a list of predefined types, and those often maxed
>> out at
17 matches
Mail list logo
