6 Aug
2008
6 Aug
'08
11:56 a.m.
Hey guys;
This may, or may not, be a silly question, but in all my years of
fiddling, I realised I had never tried this, so I'm unsure of what the
results will be.
My HP Logic Analyser (1630G) can talk to a HP 9121 via HP-IB. I have found
a 9122, which is a double-sided version of the same device, as far as I
can tell. I'm fairly confident the 1630G won't care - but the diskettes
that I have (inverse assembler pack, thanks Gavin - you rock) are
single-sided.
Is there any reason that the 9122 DS drive won't read a SS diskette for
the 9121?
Thank you for your help!
- JP
6 Aug
6 Aug
12:35 p.m.
New subject: Double-Sided disk drives reading Single-Sided disks (HP 9122 vs 9121)
can tell. I'm fairly confident the 1630G won't
care - but the diskettes
that I have (inverse assembler pack, thanks Gavin - you rock) are
single-sided.
I Sold my 16xx logic analyzer because i NEVER have been able to found
it. Would you mind to share it on a page?
Take a look here:
http://www.tabajara-labs.com.br/hal/index.htm
I'm sharing all I've got :o)
Thanks
Alexandre
3:20 p.m.
New subject: Double-Sided disk drives reading Single-Sided disks (HP 9122 vs
Hey guys;
This may, or may not, be a silly question, but in all my years of
fiddling, I realised I had never tried this, so I'm unsure of what the
results will be.
My HP Logic Analyser (1630G) can talk to a HP 9121 via HP-IB. I have found
a 9122, which is a double-sided version of the same device, as far as I
Is it? I thought the command set was different, but I might be thinking
of other HP drives that looked similar on the outside and were totally
different inside.
can tell. I'm fairly confident the 1630G won't
care - but the diskettes
that I have (inverse assembler pack, thanks Gavin - you rock) are
single-sided.
Is there any reason that the 9122 DS drive won't read a SS diskette for
the 9121?
The 9122 can certainly read SS disks. Whether the system can handle it is
another matter.
-tony
3:43 p.m.
New subject: Double-Sided disk drives reading Single-Sided disks (HP 9122 vs
On Wed, 6 Aug 2008, Tony Duell wrote:
Vassilis Prevelakis has informed me that the 9121 speaks Amigo, while the
9122 is SS80. Obviously this may throw a wrench in the works! I'm going to
have to go over the 1630 manual tonight and work out if it can speak both,
or not, but I'm not optimistic.
Don't suppose anyone out there has a 9121 I can buy? :)
- JP
Hey guys;
This may, or may not, be a silly question, but in all my years of
fiddling, I realised I had never tried this, so I'm unsure of what the
results will be.
My HP Logic Analyser (1630G) can talk to a HP 9121 via HP-IB. I have found
a 9122, which is a double-sided version of the same device, as far as I
Is it? I thought the command set was different, but I might be thinking
of other HP drives that looked similar on the outside and were totally
different inside. 
7 Aug
7 Aug
8:59 a.m.
JP Hindin ????????:
Is there any reason that the 9122 DS drive won't read a SS diskette for
the 9121?
A small thing about DOS formatted HP SSDD disks:
They are marked as double-sided. When the system reads the first
sector and sees that it's marked as double-sided it will try to read
the next sector off the other side. No idea why HP did this.
Naturally, MS|IBM-DOS ignores the double-sided bit.
A system has to try to read the next sector from the same side of the
disk if reading the second sector fails. There's nothing else to tell
the system it's single-sided.
Would be nice to get *nix & fdparm to work with SSDD floppies.
--
jd
5792
days inactive
5793
days old
4 comments
4 participants
participants (4)
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alexandre-listas＠e-secure.com.br -
ard＠p850ug1.demon.co.uk -
jplist2007＠kiwigeek.com -
onymouse＠garlic.com