On Tue, Nov 1, 2016 at 3:53 AM, allison wrote:
> On 10/31/2016 07:45 PM, Al Kossow wrote:
> >
> > On 10/31/16 3:08 PM, Vincent Slyngstad wrote:
> >
> >> Isn't there some weird crap in track 0 on DECmate RX01s
>
> It also has the slushware code, aka front panel space code to do
> stuff on the IM61
On 10/31/2016 07:45 PM, Al Kossow wrote:
>
> On 10/31/16 3:08 PM, Vincent Slyngstad wrote:
>
>> Isn't there some weird crap in track 0 on DECmate RX01s
It also has the slushware code, aka front panel space code to do
stuff on the IM6100 chip and peripherals. the 6100/6120
have two spaces front pa
On 10/31/2016 12:41 PM, allison wrote:
On 10/31/16 3:26 PM, Paul Koning wrote:
On Oct 31, 2016, at 2:58 PM, jim stephens wrote:
If you cared about not erasing the drive manufacture's data on
sealed media Winchester and the like you have to avoid any writes to
cylinder 0 at all.
The drive
If you cared about not erasing the drive manufacture's data on sealed
media Winchester and the like you have to avoid any writes to cylinder 0
at all.
On a floppy?
It might not be relevant HERE, but SOME computers have a different
physical format on track 0 (such as systems that evolved from
On 10/31/16 3:08 PM, Vincent Slyngstad wrote:
> Isn't there some weird crap in track 0 on DECmate RX01s
It is IBM 3740 table of contents information.
GA21-9182-5_Diskette_General_Information_Manual_Jul80.pdf for the details
> From: Don North
> Track 0 is not used by standard DEC software
I wonder why DEC did't use track 0. The thing is small enough (256KB in the
original single-density) that even 1% is a good chunk to throw away. Does
anyone know? (I had a look online, but couldn't turn anything up.)
Isn't t
On 10/31/16 3:26 PM, Paul Koning wrote:
On Oct 31, 2016, at 2:58 PM, jim stephens wrote:
If you cared about not erasing the drive manufacture's data on sealed media
Winchester and the like you have to avoid any writes to cylinder 0 at all.
The drive formatting software could read that cylinde
On 10/31/16 2:58 PM, jim stephens wrote:
On 10/30/2016 4:24 PM, Don North wrote:
On 10/30/2016 5:47 AM, Noel Chiappa wrote:
> From: Don North
> .. the hardware bootstrap reads track 1 sectors 1, 3, 5, 7
Ah, thanks for that. Starting to look at the code, I had missed the
interleav
> On Oct 31, 2016, at 2:58 PM, jim stephens wrote:
>
> If you cared about not erasing the drive manufacture's data on sealed media
> Winchester and the like you have to avoid any writes to cylinder 0 at all.
>
> The drive formatting software could read that cylinder track 0 for a defect
> map
On 10/30/2016 4:24 PM, Don North wrote:
On 10/30/2016 5:47 AM, Noel Chiappa wrote:
> From: Don North
> .. the hardware bootstrap reads track 1 sectors 1, 3, 5, 7
Ah, thanks for that. Starting to look at the code, I had missed the
interleave.
So does DEC do anything with track 0,
On 31/10/2016 13:55, Noel Chiappa wrote:
I wonder why DEC did't use track 0. The thing is small enough (256KB in the
original single-density) that even 1% is a good chunk to throw away. Does
anyone know? (I had a look online, but couldn't turn anything up.)
If I had to _guess_, one possibility w
> On Oct 31, 2016, at 9:55 AM, Noel Chiappa wrote:
>
>> From: Don North
>
>> Track 0 is not used by standard DEC software
>
> I wonder why DEC did't use track 0. The thing is small enough (256KB in the
> original single-density) that even 1% is a good chunk to throw away. Does
> anyone know? (
> From: Don North
> Track 0 is not used by standard DEC software
I wonder why DEC did't use track 0. The thing is small enough (256KB in the
original single-density) that even 1% is a good chunk to throw away. Does
anyone know? (I had a look online, but couldn't turn anything up.)
If I h
On 10/30/2016 5:47 AM, Noel Chiappa wrote:
> From: Don North
> .. the hardware bootstrap reads track 1 sectors 1, 3, 5, 7
Ah, thanks for that. Starting to look at the code, I had missed the
interleave.
So does DEC do anything with track 0, or is it always just empty?
Noel
> From: Don North
> .. the hardware bootstrap reads track 1 sectors 1, 3, 5, 7
Ah, thanks for that. Starting to look at the code, I had missed the
interleave.
So does DEC do anything with track 0, or is it always just empty?
Noel
On 10/29/2016 2:32 PM, Ron Natalie wrote:
I think just like everything else the boot rom just pulls in the first
sector of the disk. I had RX02s on many of the BRL Gateways (my
implementation that replaced your MIT Gateway while you were in exile).
We put a V6 file system and I must have had a
I think just like everything else the boot rom just pulls in the first
sector of the disk. I had RX02s on many of the BRL Gateways (my
implementation that replaced your MIT Gateway while you were in exile).
We put a V6 file system and I must have had a regular V6 boot block on it
with a RX02. T
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