29 Nov
2019
29 Nov
'19
4:01 p.m.
Let's try again with the right name in the Subject line!
It's not really classic (although it does try to pretend to be
but does anyone here do anything with the P112 SBC? I am trying to
get 8" disks running on it but I am seeing some rather strange behavior.
bill
30 Nov
30 Nov
6:15 a.m.
On 2019-11-29 19:01, Bill Gunshannon via cctalk wrote:
Let's try again with the right name in the Subject line!
It's not really classic (although it does try to pretend to be
but does anyone here do anything with the P112 SBC? I am trying to
get 8" disks running on it but I am seeing some rather strange behavior.
You should probably describe the "strange behavior". There is a chance,
it isn't a P112 problem?
9:22 a.m.
On 11/30/19 9:15 AM, emanuel stiebler wrote:
On 2019-11-29 19:01, Bill Gunshannon via cctalk
wrote:
I was waiting to see if there were any P112 users first,
I'll start with the simple and funny one. If i run FORMAT
it formats all 80 tracks. :-) Seems like the definition
for an 8" disk as selected in the config menu is just plain
wrong. Of course, once it formats all 80 :-) tracks any
attempt to access it, like a DIR, just returns "sector not
found".
bill
Let's try again with the right name in the Subject line!
It's not really classic (although it does try to pretend to be
but does anyone here do anything with the P112 SBC? I am trying to
get 8" disks running on it but I am seeing some rather strange behavior.
You should probably describe the "strange behavior". There is a chance,
it isn't a P112 problem?
4:16 p.m.
On Sat, 30 Nov 2019, Bill Gunshannon via cctalk wrote:
I'll start with the simple and funny one. If i
run FORMAT
it formats all 80 tracks. :-) Seems like the definition
for an 8" disk as selected in the config menu is just plain
wrong. Of course, once it formats all 80 :-) tracks any
attempt to access it, like a DIR, just returns "sector not
found".
A lot could depend on how the software is interpreting the FDC return
codes.
In the case of PC BIOS (765), error code number 4) that would mean that it
did format; it sees sectors, but not the one that you asked for.
That may be that the format command setup and the read are in
disagreement on sector numbers, and/or sector size.
It could also happen if it ended up on the wrong track. (then the C field
of the CHRN of the sector doesn't match the C field of the CHRN requested)
Even a non-functional stepper could do that. Be well aware thet "VERIFY"
checks whether there are READABLE sectors, not whether they have correct
content. If you want RELIABLE code, include a READ after WRITE, rather
than rely on the FDC "VERIFY".
A non-functional WRITE (including FORMAT) will VERIFY just fine, but leave
behind whatever had been on the track before, rather than what you though
that you had put there.
PC FDC returns error code 2 for not seeing address mark. However, MS-DOS
goes through a short list of codes that it knows, and then falls through
to "error, but none of the above" and says "General Failure" (I
can't help
but think that that was one of the brass in VietNam)
5:17 p.m.
On 11/30/19 7:16 PM, Fred Cisin via cctalk wrote:
On Sat, 30 Nov 2019, Bill Gunshannon via cctalk
wrote:
I think you missed something. This is a P112 SBC not a PC. I watch
the head step from track to track until it runs into the stop after
passing the last real track. I have a dbit 8" adapter and it displays
the track count and I watch it go from 0 to 79. I am assuming the
problem is that wherever the disk parameters are being stored on the
P112 they are wrong for 8" disks.
bill
I'll start with the simple and funny one.? If
i run FORMAT
it formats all 80 tracks.? :-)? Seems like the definition
for an 8" disk as selected in the config menu is just plain
wrong.? Of course, once it formats all 80 :-) tracks any
attempt to access it, like a DIR, just returns "sector not
found".
A lot could depend on how the software is interpreting the FDC return
codes.
In the case of PC BIOS (765), error code number 4) that would mean that
it did format; it sees sectors, but not the one that you asked for.
That may be that the format command setup and the read are in
disagreement on sector numbers, and/or sector size.
It could also happen if it ended up on the wrong track.? (then the C
field of the CHRN of the sector doesn't match the C field of the CHRN
requested)
Even a non-functional stepper could do that.? Be well aware thet
"VERIFY" checks whether there are READABLE sectors, not whether they
have correct content.? If you want RELIABLE code, include a READ after
WRITE, rather than rely on the FDC "VERIFY".
A non-functional WRITE (including FORMAT) will VERIFY just fine, but
leave behind whatever had been on the track before, rather than what you
though that you had put there.
PC FDC returns error code 2 for not seeing address mark.? However,
MS-DOS goes through a short list of codes that it knows, and then falls
through to "error, but none of the above" and says "General Failure"
(I
can't help but think that that was one of the brass in VietNam)
5:28 p.m.
> A lot could depend on how the software is
interpreting the FDC return
> codes.
>
> In the case of PC BIOS (765), error code number 4) that would mean that
On Sun, 1 Dec 2019, Bill Gunshannon via cctalk wrote:
I think you missed something. This is a P112 SBC not
a PC. I watch
the head step from track to track until it runs into the stop after
passing the last real track. I have a dbit 8" adapter and it displays
the track count and I watch it go from 0 to 79. I am assuming the
problem is that wherever the disk parameters are being stored on the
P112 they are wrong for 8" disks.
That's exactly why I said that it depended on how the software interprets
error codes, and used PC as an eaxample for comparison, not that it would
necessarily be the same.
You are absolutely right that I don't know anything about P112 disk
access.
You are right that the disk parameters are obviously wrong for 8", if only
the wrong track count. I have seen THAT error before.
Are the OTHER parameters at least usable?
If it says "sector not found", then there is a possibility (LIKE the PC
example that I used), that that may mean that it sees sectors, but not
the right ones. But, there is still the possibility that it is using
that message for any and all disk errors.
BTW, I understand that NEC uses 77 tracks on their high density 5.25 and
3.5 inch formats, and 360RPM for 3.5". (Same parameters for all three
sizes!)
5:41 p.m.
On 11/30/19 8:28 PM, Fred Cisin via cctalk wrote:
I was hoping there would be people here who did. I have had these
SBC's for several years but have never even powered one up before.
> A lot
could depend on how the software is interpreting the FDC return
> codes.
>
> In the case of PC BIOS (765), error code number 4) that would mean that
On Sun, 1 Dec 2019, Bill Gunshannon via cctalk wrote:
I think you missed something.? This is a P112 SBC
not a PC.? I watch
the head step from track to track until it runs into the stop after
passing the last real track.? I have a dbit 8" adapter and it displays
the track count and I watch it go from 0 to 79.? I am assuming the
problem is that wherever the disk parameters are being stored on the
P112 they are wrong for 8" disks.
That's exactly why I said that it depended on how the software
interprets error codes, and used PC as an eaxample for comparison, not
that it would necessarily be the same.
You are absolutely right that I don't know anything about P112 disk access.
You are right that the disk parameters are obviously wrong for 8", if
only the wrong track count.? I have seen THAT error before.
Are the OTHER parameters at least usable?
I have no way of knowing. My first test was to try formatting a disk
and then reading a (blank) directory. But, as I said, while it says
the format was successful it can not read the disk.
If it says "sector not found", then there is a possibility (LIKE the PC
example that I used), that that may mean that it sees sectors, but not
the right ones.? But, there is still the possibility that it is using
that message for any and all disk errors.
Again this is why I need to find someone with experience with the P112.
I am beginning to suspect these were not as popular in reality as they
seemed to be on mailing lists.
BTW, I understand that NEC uses 77 tracks on their high density 5.25 and
3.5 inch formats, and 360RPM for 3.5".?? (Same parameters for all three
sizes!)
Well, I haven't tried 5.25" but 3.5" disks format/read/write just fine.
bill
6:03 p.m.
On Sun, 1 Dec 2019, Bill Gunshannon via cctalk wrote:
Well, I haven't tried 5.25" but 3.5"
disks format/read/write just fine.
That is a significant succesful test of MOST of the hardware.
(leaving drive, cabling, and software as the likely alternate culprits)
Speculating (with no knowledge of P112 (or P118 :-)) about the wrong
parameters (even though 77 V 80 SEEMS minor), if the parameters are
stored separately for FORMAT V READ/WRITE, that could obviously do it.
If it were to have totally wrong parameters, and tried to put more
sectors on a track than would fit, would it wrap around (past index) and
overwrite the first sector with one of the later ones?
A couple of obvious other things to consider (that you probably
have already considered) trying:
1) do you have some other machine with 8" capability to look at the disk
that you formatted?
2) Do you get the same errors on a pre-formatted disk from something else?
(not necessarily much good as a test, because any format with different
sector size or sector numbering would probably also give that error)
3) Perhaps tell it that the 3.5" drive is an 8", and see what it does
(300RPM V 360RPM shouldn't prevent that interchange in that direction,
although "type 3" 3.5" drive (360RPM) would be ideal)
6:15 p.m.
The current P112 is a reissue from years ago, right? I remember I had one ? and I may
still have it somewhere ? but I only used it with 3.5? drives. Somehow I think it was
built that way by design (the board outline fit on a drive).
I don?t know how available the code is, but I would look at the firmware on the board. To
me it sounds like it has a bad drive definition. The 8272 is pretty easy to program for (I
use it on my IMSAI).
As an aside, I use a modified YD-380 (5.25? HD) drive to replace the 8? drives on my IMSAI
so as a quick test you could use one of those. At least it can step to 80 tracks and has
the same speed and bit rate. I have instructions on my site how to use it.
Rich
Get Outlook for iOS
On Sat, Nov 30, 2019 at 8:42 PM -0500, "Bill Gunshannon via cctalk" <cctalk
at classiccmp.org> wrote:
On 11/30/19 8:28 PM, Fred Cisin via cctalk wrote:
I was hoping there would be people here who did. I have had these
SBC's for several years but have never even powered one up before.
> A lot
could depend on how the software is interpreting the FDC return
> codes.
>
> In the case of PC BIOS (765), error code number 4) that would mean that
On Sun, 1 Dec 2019, Bill Gunshannon via cctalk wrote:
I think you missed something.? This is a P112 SBC
not a PC.? I watch
the head step from track to track until it runs into the stop after
passing the last real track.? I have a dbit 8" adapter and it displays
the track count and I watch it go from 0 to 79.? I am assuming the
problem is that wherever the disk parameters are being stored on the
P112 they are wrong for 8" disks.
That's exactly why I said that it depended on how the software
interprets error codes, and used PC as an eaxample for comparison, not
that it would necessarily be the same.
You are absolutely right that I don't know anything about P112 disk access.
You are right that the disk parameters are obviously wrong for 8", if
only the wrong track count.? I have seen THAT error before.
Are the OTHER parameters at least usable?
I have no way of knowing. My first test was to try formatting a disk
and then reading a (blank) directory. But, as I said, while it says
the format was successful it can not read the disk.
If it says "sector not found", then there is a possibility (LIKE the PC
example that I used), that that may mean that it sees sectors, but not
the right ones.? But, there is still the possibility that it is using
that message for any and all disk errors.
Again this is why I need to find someone with experience with the P112.
I am beginning to suspect these were not as popular in reality as they
seemed to be on mailing lists.
BTW, I understand that NEC uses 77 tracks on their high density 5.25 and
3.5 inch formats, and 360RPM for 3.5".?? (Same parameters for all three
sizes!)
Well, I haven't tried 5.25" but 3.5" disks format/read/write just fine.
bill
6:34 p.m.
On 11/30/2019 6:15 PM, Richard Cini via cctalk wrote:
The current P112 is a reissue from years ago, right? I remember I had one ? and I
may still have it somewhere ? but I only used it with 3.5? drives. Somehow I think it was
built that way by design (the board outline fit on a drive).
I don?t know how available the code is, but I would look at the firmware on the board. To
me it sounds like it has a bad drive definition. The 8272 is pretty easy to program for (I
use it on my IMSAI).
As an aside, I use a modified YD-380 (5.25? HD) drive to replace the 8? drives on my
IMSAI so as a quick test you could use one of those. At least it can step to 80 tracks and
has the same speed and bit rate. I have instructions on my site how to use it.
Rich
I have a archive and a board which I bought with the TCP option, as well
as CF adapter, etc.
I can share it if it's not available online
Here is the contents I have.
-rw-r--r--+ 1 1003 nogroup 915852 Sep? 9? 2000 bootdisk.img.gz
drwxrwxrwx+ 1 1003 nogroup??? 270 Oct? 9? 2014 daveb
drwxrwxrwx+ 1?? 98????? 98??? 674 Apr? 9? 2018 downloads-stack180
drwxrwxrwx+ 1?? 98????? 98??? 274 Apr? 9? 2018 gide
drwxrwxrwx+ 1?? 98????? 98??? 954 Apr? 9? 2018 hal-bower
drwxr-xr-x+ 1 1003 nogroup??? 574 Oct? 9? 2014 p112
drwxrwxrwx+ 1?? 98????? 98??? 552 Apr? 9? 2018 p112-2018
-rw-r--r--+ 1 1003 nogroup 331632 Sep 19? 2014 p112-doc.pdf
-rw-r--r--+ 1 1003 nogroup? 14305 Sep? 9? 2000 rawrite.exe
-rw-r--r--+ 1 1003 nogroup 357891 Oct 22? 2005 sc102205.img.gz
-rw-r--r--+ 1 1003 nogroup 445535 Nov 11? 2005 sc111105.img.gz
-rw-r--r--+ 1 1003 nogroup 436332 Nov 30? 2005 sc113005.img.gz
drwxr-xr-x+ 1 1003 nogroup?? 3660 Oct? 9? 2014 tcj-archive
drwxr-xr-x+ 1 1003 nogroup??? 268 Oct? 9? 2014 web
-rw-r--r--+ 1 1003 nogroup 660331 Oct 17? 2005 zs101805.img.gz
-rw-r--r--+ 1 1003 nogroup 513625 Oct 21? 2005 zs102205.img.gz
-rw-r--r--+ 1 1003 nogroup 612086 Nov 11? 2005 zs111105.img.gz
-rw-r--r--+ 1 1003 nogroup 552969 Nov 30? 2005 zs113005.img.gz
drwxr-xr-x+ 1 1003 nogroup??? 260 Oct? 9? 2014 zsdos
-rw-r--r--+ 1 1003 nogroup 554479 Apr 22? 2009 zsdos.pdf
7:08 p.m.
On Sat, Nov 30, 2019, 9:34 PM jim stephens via cctalk <cctalk at classiccmp.org wrote:
On 11/30/2019 6:15 PM, Richard Cini via cctalk wrote:
Today at our workshop meeting we got one of these up and running. We have
worshops in Kennett Square monthly if you're in the Philadelphia area. I
can put you in touch with the owner off line if you'd like.
Bill
The current P112 is a reissue from years ago, right? I remember I
had one ?
and I may still have it somewhere ? but I only used it with 3.5?
drives. Somehow I think it was built that way by design (the board outline
fit on a drive).
I don?t know how available the code is, but I
would look at the firmware
on the board. To me it sounds like it has a bad drive
definition. The 8272
is pretty easy to program for (I use it on my IMSAI).
As an aside, I use a modified YD-380 (5.25? HD)
drive to replace the 8?
drives on my IMSAI so as a quick test you could use one of
those. At least
it can step to 80 tracks and has the same speed and bit rate. I have
instructions on my site how to use it.
Rich
I have a archive and a board which I bought with the TCP option, as well
as CF adapter, etc.
I can share it if it's not available online
Here is the contents I have.
-rw-r--r--+ 1 1003 nogroup 915852 Sep 9 2000 bootdisk.img.gz
drwxrwxrwx+ 1 1003 nogroup 270 Oct 9 2014 daveb
drwxrwxrwx+ 1 98 98 674 Apr 9 2018 downloads-stack180
drwxrwxrwx+ 1 98 98 274 Apr 9 2018 gide
drwxrwxrwx+ 1 98 98 954 Apr 9 2018 hal-bower
drwxr-xr-x+ 1 1003 nogroup 574 Oct 9 2014 p112
drwxrwxrwx+ 1 98 98 552 Apr 9 2018 p112-2018
-rw-r--r--+ 1 1003 nogroup 331632 Sep 19 2014 p112-doc.pdf
-rw-r--r--+ 1 1003 nogroup 14305 Sep 9 2000 rawrite.exe
-rw-r--r--+ 1 1003 nogroup 357891 Oct 22 2005 sc102205.img.gz
-rw-r--r--+ 1 1003 nogroup 445535 Nov 11 2005 sc111105.img.gz
-rw-r--r--+ 1 1003 nogroup 436332 Nov 30 2005 sc113005.img.gz
drwxr-xr-x+ 1 1003 nogroup 3660 Oct 9 2014 tcj-archive
drwxr-xr-x+ 1 1003 nogroup 268 Oct 9 2014 web
-rw-r--r--+ 1 1003 nogroup 660331 Oct 17 2005 zs101805.img.gz
-rw-r--r--+ 1 1003 nogroup 513625 Oct 21 2005 zs102205.img.gz
-rw-r--r--+ 1 1003 nogroup 612086 Nov 11 2005 zs111105.img.gz
-rw-r--r--+ 1 1003 nogroup 552969 Nov 30 2005 zs113005.img.gz
drwxr-xr-x+ 1 1003 nogroup 260 Oct 9 2014 zsdos
-rw-r--r--+ 1 1003 nogroup 554479 Apr 22 2009 zsdos.pdf
9:45 p.m.
On 11/30/2019 8:34 PM, jim stephens via cctalk wrote:
On 11/30/2019 6:15 PM, Richard Cini via cctalk wrote:
What's in the p112-2018 directory?
???????? The current P112 is a reissue from years
ago, right? I
remember I had one ? and I may still have it somewhere ? but I only
used it with 3.5? drives. Somehow I think it was built that way by
design (the board outline fit on a drive).
I don?t know how available the code is, but I would look at the
firmware on the board. To me it sounds like it has a bad drive
definition. The 8272 is pretty easy to program for (I use it on my
IMSAI).
As an aside, I use a modified YD-380 (5.25? HD) drive to replace the
8? drives on my IMSAI so as a quick test you could use one of those.
At least it can step to 80 tracks and has the same speed and bit rate.
I have instructions on my site how to use it.
Rich
I have a archive and a board which I bought with the TCP option, as well
as CF adapter, etc.
I can share it if it's not available online
Here is the contents I have.
-rw-r--r--+ 1 1003 nogroup 915852 Sep? 9? 2000 bootdisk.img.gz
drwxrwxrwx+ 1 1003 nogroup??? 270 Oct? 9? 2014 daveb
drwxrwxrwx+ 1?? 98????? 98??? 674 Apr? 9? 2018 downloads-stack180
drwxrwxrwx+ 1?? 98????? 98??? 274 Apr? 9? 2018 gide
drwxrwxrwx+ 1?? 98????? 98??? 954 Apr? 9? 2018 hal-bower
drwxr-xr-x+ 1 1003 nogroup??? 574 Oct? 9? 2014 p112
drwxrwxrwx+ 1?? 98????? 98??? 552 Apr? 9? 2018 p112-2018
-rw-r--r--+ 1 1003 nogroup 331632 Sep 19? 2014 p112-doc.pdf
-rw-r--r--+ 1 1003 nogroup? 14305 Sep? 9? 2000 rawrite.exe
-rw-r--r--+ 1 1003 nogroup 357891 Oct 22? 2005 sc102205.img.gz
-rw-r--r--+ 1 1003 nogroup 445535 Nov 11? 2005 sc111105.img.gz
-rw-r--r--+ 1 1003 nogroup 436332 Nov 30? 2005 sc113005.img.gz
drwxr-xr-x+ 1 1003 nogroup?? 3660 Oct? 9? 2014 tcj-archive
drwxr-xr-x+ 1 1003 nogroup??? 268 Oct? 9? 2014 web
-rw-r--r--+ 1 1003 nogroup 660331 Oct 17? 2005 zs101805.img.gz
-rw-r--r--+ 1 1003 nogroup 513625 Oct 21? 2005 zs102205.img.gz
-rw-r--r--+ 1 1003 nogroup 612086 Nov 11? 2005 zs111105.img.gz
-rw-r--r--+ 1 1003 nogroup 552969 Nov 30? 2005 zs113005.img.gz
drwxr-xr-x+ 1 1003 nogroup??? 260 Oct? 9? 2014 zsdos
-rw-r--r--+ 1 1003 nogroup 554479 Apr 22? 2009 zsdos.pdf
11:32 p.m.
On 11/30/2019 9:45 PM, Eric Dittman via cctalk wrote:
On 11/30/2019 8:34 PM, jim stephens via cctalk wrote:
total 6192
-rwxrwxrwx+ 1? 98?????? 98 915852 Sep? 9? 2000 bootdisk.img.gz
-rwxrwxrwx+ 1? 98?????? 98 119042 Oct 31? 2004 files.zip
-rw-r--r--+ 1 jws hyperbox?? 1627 Apr? 9? 2018 link.txt
-rwxrwxrwx+ 1? 98?????? 98 763392 Aug 16? 2016 P112-012.PcbDoc
drwxrwxrwx+ 1? 98?????? 98???? 26 Apr? 9? 2018 P112 CPU Single Board
Computer Kit_files
-rwxrwxrwx+ 1? 98?????? 98? 12071 Apr? 9? 2018 P112 CPU Single Board
Computer Kit.html
-rwxrwxrwx+ 1? 98?????? 98 334019 Oct? 8? 2014 p112-doc.pdf
-rwxrwxrwx+ 1? 98?????? 98? 14305 Sep? 9? 2000 rawrite.exe
-rwxrwxrwx+ 1? 98?????? 98?? 8337 Apr? 9? 2018 rawwrite.html
-rwxrwxrwx+ 1? 98?????? 98 357891 Oct 22? 2005 sc102205.img.gz
-rwxrwxrwx+ 1? 98?????? 98 445535 Nov 11? 2005 sc111105.img.gz
-rwxrwxrwx+ 1? 98?????? 98 436332 Nov 30? 2005 sc113005.img.gz
-rwxrwxrwx+ 1? 98?????? 98 660331 Oct 17? 2005 zs101805.img.gz
-rwxrwxrwx+ 1? 98?????? 98 513625 Oct 21? 2005 zs102205.img.gz
-rwxrwxrwx+ 1? 98?????? 98 612086 Nov 11? 2005 zs111105.img.gz
-rwxrwxrwx+ 1? 98?????? 98 552969 Nov 30? 2005 zs113005.img.gz
-rwxrwxrwx+ 1? 98?????? 98 554479 Apr 22? 2009 zsdos.pdf
Contents of the 661.org site.? I pretty much sent the links file below
in another posting, but here it is anyway.
I bought a p112 in 2018 (hence the dir name), and had Terry Gulczynski
assemble it.
https://661.org/p112/
Links.txt
http://p112.sourceforge.net/
??? Here's a Sourceforge page for all sorts of information on getting
??? the most out of your P112.
http://stack180.com/
??? TG Consulting is where you'll find Terry Gulczynski's writings and
??? a schedule of services. Terry created the new Z-System with ZSDOS
??? for the P112 and updated the boot rom. He can assemble and test a
??? P112 kit for you or supply a GIDE interface board among other
??? things.
http://members.iinet.net.au/~daveb/p112/p112.html
??? Dave Brooks is the designer of the P112.
http://www.classiccmp.org/cpmarchives/cpm/Miscellany/BDOS-CCP/ZSDOS/HalBowe…
??? Hal Bower did lots of stuff in 1996 and now to help the P112 be
??? all it can be. Lots of CP/M tools and information can be found
??? at his page.
http://www.retrotechnology.com/herbs_stuff/z80_systems.html
??? Herb Johnson is another person who was helpful in getting my first
??? batch of P112 kits ready for use. He was the first to import and
??? sell the original GIDE interface in the United States. He also
??? had some influence on its design. See also this page for GIDE
??? history and other implementations of GIDE.
http://www.feedle.net/
??? Professor Feedlebom was enormously helpful in getting stuff to
??? and from the board-manufacturer and board-stuffer, and with
??? financing.
http://www.classiccmp.org/dunfield/img/index.htm
??? Daves Old Computers - Disk/Software Images. Boot disks for lots
??? of different vintage computers are here. It's not nearly the
??? size of Don Maslin's lost archive, but it's a start.
Here is the contents I have.
-rw-r--r--+ 1 1003 nogroup 915852 Sep? 9? 2000 bootdisk.img.gz
drwxrwxrwx+ 1 1003 nogroup??? 270 Oct? 9? 2014 daveb
drwxrwxrwx+ 1?? 98????? 98??? 674 Apr? 9? 2018 downloads-stack180
drwxrwxrwx+ 1?? 98????? 98??? 274 Apr? 9? 2018 gide
drwxrwxrwx+ 1?? 98????? 98??? 954 Apr? 9? 2018 hal-bower
drwxr-xr-x+ 1 1003 nogroup??? 574 Oct? 9? 2014 p112
drwxrwxrwx+ 1?? 98????? 98??? 552 Apr? 9? 2018 p112-2018
-rw-r--r--+ 1 1003 nogroup 331632 Sep 19? 2014 p112-doc.pdf
-rw-r--r--+ 1 1003 nogroup? 14305 Sep? 9? 2000 rawrite.exe
-rw-r--r--+ 1 1003 nogroup 357891 Oct 22? 2005 sc102205.img.gz
-rw-r--r--+ 1 1003 nogroup 445535 Nov 11? 2005 sc111105.img.gz
-rw-r--r--+ 1 1003 nogroup 436332 Nov 30? 2005 sc113005.img.gz
drwxr-xr-x+ 1 1003 nogroup?? 3660 Oct? 9? 2014 tcj-archive
drwxr-xr-x+ 1 1003 nogroup??? 268 Oct? 9? 2014 web
-rw-r--r--+ 1 1003 nogroup 660331 Oct 17? 2005 zs101805.img.gz
-rw-r--r--+ 1 1003 nogroup 513625 Oct 21? 2005 zs102205.img.gz
-rw-r--r--+ 1 1003 nogroup 612086 Nov 11? 2005 zs111105.img.gz
-rw-r--r--+ 1 1003 nogroup 552969 Nov 30? 2005 zs113005.img.gz
drwxr-xr-x+ 1 1003 nogroup??? 260 Oct? 9? 2014 zsdos
-rw-r--r--+ 1 1003 nogroup 554479 Apr 22? 2009 zsdos.pdf
What's in the p112-2018 directory?
1 Dec
1 Dec
7:59 a.m.
FWIW, there might be more users of P112 (old and new) on the RetroBrew
Computers Forum https://www.retrobrewcomputers.org/forum/
HTH
On Sun, Dec 1, 2019 at 8:33 AM jim stephens via cctalk
<cctalk at classiccmp.org> wrote:
On 11/30/2019 9:45 PM, Eric Dittman via cctalk wrote:
--
mvh
Torfinn
On 11/30/2019 8:34 PM, jim stephens via cctalk
wrote:
total 6192
-rwxrwxrwx+ 1 98 98 915852 Sep 9 2000 bootdisk.img.gz
-rwxrwxrwx+ 1 98 98 119042 Oct 31 2004 files.zip
-rw-r--r--+ 1 jws hyperbox 1627 Apr 9 2018 link.txt
-rwxrwxrwx+ 1 98 98 763392 Aug 16 2016 P112-012.PcbDoc
drwxrwxrwx+ 1 98 98 26 Apr 9 2018 P112 CPU Single Board
Computer Kit_files
-rwxrwxrwx+ 1 98 98 12071 Apr 9 2018 P112 CPU Single Board
Computer Kit.html
-rwxrwxrwx+ 1 98 98 334019 Oct 8 2014 p112-doc.pdf
-rwxrwxrwx+ 1 98 98 14305 Sep 9 2000 rawrite.exe
-rwxrwxrwx+ 1 98 98 8337 Apr 9 2018 rawwrite.html
-rwxrwxrwx+ 1 98 98 357891 Oct 22 2005 sc102205.img.gz
-rwxrwxrwx+ 1 98 98 445535 Nov 11 2005 sc111105.img.gz
-rwxrwxrwx+ 1 98 98 436332 Nov 30 2005 sc113005.img.gz
-rwxrwxrwx+ 1 98 98 660331 Oct 17 2005 zs101805.img.gz
-rwxrwxrwx+ 1 98 98 513625 Oct 21 2005 zs102205.img.gz
-rwxrwxrwx+ 1 98 98 612086 Nov 11 2005 zs111105.img.gz
-rwxrwxrwx+ 1 98 98 552969 Nov 30 2005 zs113005.img.gz
-rwxrwxrwx+ 1 98 98 554479 Apr 22 2009 zsdos.pdf
Contents of the 661.org site. I pretty much sent the links file below
in another posting, but here it is anyway.
I bought a p112 in 2018 (hence the dir name), and had Terry Gulczynski
assemble it.
https://661.org/p112/
Links.txt
http://p112.sourceforge.net/
Here's a Sourceforge page for all sorts of information on getting
the most out of your P112.
http://stack180.com/
TG Consulting is where you'll find Terry Gulczynski's writings and
a schedule of services. Terry created the new Z-System with ZSDOS
for the P112 and updated the boot rom. He can assemble and test a
P112 kit for you or supply a GIDE interface board among other
things.
http://members.iinet.net.au/~daveb/p112/p112.html
Dave Brooks is the designer of the P112.
http://www.classiccmp.org/cpmarchives/cpm/Miscellany/BDOS-CCP/ZSDOS/HalBowe…
Hal Bower did lots of stuff in 1996 and now to help the P112 be
all it can be. Lots of CP/M tools and information can be found
at his page.
http://www.retrotechnology.com/herbs_stuff/z80_systems.html
Herb Johnson is another person who was helpful in getting my first
batch of P112 kits ready for use. He was the first to import and
sell the original GIDE interface in the United States. He also
had some influence on its design. See also this page for GIDE
history and other implementations of GIDE.
http://www.feedle.net/
Professor Feedlebom was enormously helpful in getting stuff to
and from the board-manufacturer and board-stuffer, and with
financing.
http://www.classiccmp.org/dunfield/img/index.htm
Daves Old Computers - Disk/Software Images. Boot disks for lots
of different vintage computers are here. It's not nearly the
size of Don Maslin's lost archive, but it's a start.
Here is the contents I have.
-rw-r--r--+ 1 1003 nogroup 915852 Sep 9 2000 bootdisk.img.gz
drwxrwxrwx+ 1 1003 nogroup 270 Oct 9 2014 daveb
drwxrwxrwx+ 1 98 98 674 Apr 9 2018 downloads-stack180
drwxrwxrwx+ 1 98 98 274 Apr 9 2018 gide
drwxrwxrwx+ 1 98 98 954 Apr 9 2018 hal-bower
drwxr-xr-x+ 1 1003 nogroup 574 Oct 9 2014 p112
drwxrwxrwx+ 1 98 98 552 Apr 9 2018 p112-2018
-rw-r--r--+ 1 1003 nogroup 331632 Sep 19 2014 p112-doc.pdf
-rw-r--r--+ 1 1003 nogroup 14305 Sep 9 2000 rawrite.exe
-rw-r--r--+ 1 1003 nogroup 357891 Oct 22 2005 sc102205.img.gz
-rw-r--r--+ 1 1003 nogroup 445535 Nov 11 2005 sc111105.img.gz
-rw-r--r--+ 1 1003 nogroup 436332 Nov 30 2005 sc113005.img.gz
drwxr-xr-x+ 1 1003 nogroup 3660 Oct 9 2014 tcj-archive
drwxr-xr-x+ 1 1003 nogroup 268 Oct 9 2014 web
-rw-r--r--+ 1 1003 nogroup 660331 Oct 17 2005 zs101805.img.gz
-rw-r--r--+ 1 1003 nogroup 513625 Oct 21 2005 zs102205.img.gz
-rw-r--r--+ 1 1003 nogroup 612086 Nov 11 2005 zs111105.img.gz
-rw-r--r--+ 1 1003 nogroup 552969 Nov 30 2005 zs113005.img.gz
drwxr-xr-x+ 1 1003 nogroup 260 Oct 9 2014 zsdos
-rw-r--r--+ 1 1003 nogroup 554479 Apr 22 2009 zsdos.pdf
What's in the p112-2018 directory?
6 Dec
6 Dec
1:44 p.m.
New subject: HP DesignJet 600 plotter
I have an HP DesignJet 600 plotter available free for pickup in NW Indiana.
It worked the last time I needed it, sometime in the last 8 years.
--tom
10:45 p.m.
New subject: HP DesignJet 600 plotter
On Sat, Dec 7, 2019 at 12:07 AM Tom Uban via cctalk
<cctalk at classiccmp.org> wrote:
I have an HP DesignJet 600 plotter available free for pickup in NW Indiana.
It worked the last time I needed it, sometime in the last 8 years.
Do you know if it's the C2847A or C2848A? One is big; the other is even bigger.
7 Dec
7 Dec
9:01 a.m.
New subject: HP DesignJet 600 plotter
On 12/7/19 12:45 AM, Jason T via cctalk wrote:
On Sat, Dec 7, 2019 at 12:07 AM Tom Uban via cctalk
<cctalk at classiccmp.org> wrote:
C2848A It's pretty big. I also have a roll of paper for it.
I have an HP DesignJet 600 plotter available free
for pickup in NW Indiana.
It worked the last time I needed it, sometime in the last 8 years.
Do you know if
it's the C2847A or C2848A? One is big; the other is even bigger.
1 Dec
1 Dec
8:19 a.m.
On 2019/11/30 23:32:55 -0800, jim stephens via cctalk wrote:
On 11/30/2019 9:45 PM, Eric Dittman via cctalk wrote:
> On 11/30/2019 8:34 PM, jim stephens via cctalk wrote:
>>
[snip]
Links.txt
[snip]
http://www.classiccmp.org/dunfield/img/index.htm
??? Daves Old Computers - Disk/Software Images. Boot disks for lots
??? of different vintage computers are here. It's not nearly the
??? size of Don Maslin's lost archive, but it's a start.
I don't keep up with CP/M etc but I thought I recall it being
announced that Don Maslin's lost archive had been recovered?
Regards,
Peter Coghlan.
9:52 a.m.
New subject: P112 [Don Maslin Archive]
On 12/1/2019 8:19 AM, Peter Coghlan via cctalk wrote:
On 2019/11/30 23:32:55 -0800, jim stephens via cctalk wrote:
Here's the archive
http://www.retroarchive.org/maslin/
P112 I think is way newer than anything related though.
On 11/30/2019 9:45 PM, Eric Dittman via cctalk
wrote:
> On 11/30/2019 8:34 PM, jim stephens via cctalk wrote:
>>
[snip]
Links.txt
[snip]
http://www.classiccmp.org/dunfield/img/index.htm
???? Daves Old Computers - Disk/Software Images. Boot disks for lots
???? of different vintage computers are here. It's not nearly the
???? size of Don Maslin's lost archive, but it's a start.
I don't keep up with CP/M etc but I thought I recall it being
announced that Don Maslin's lost archive had been recovered?
Regards,
Peter Coghlan.
11:08 a.m.
New subject: P112 [Don Maslin Archive]
On December 1, 2019 9:52:03 AM PST, jim stephens via cctalk <cctalk at
classiccmp.org> wrote:
On 12/1/2019 8:19 AM, Peter Coghlan via cctalk wrote:
Correct.
On the 8" drive question, I haven't done it myself, but I've received reports
from people who've successfully used them with the P112. It involves pretending
they're HD 5.25" drives and using a hardware shim to deliver more current when
writing to tracks greater than X. I don't recall the specifics though.
BTW, I'm the one who's been selling them since Dave Brookes stopped doing so.
I'm out of boards again and probably won't be doing any more runs with
surface-mounts preinstalled on account of the difficulty of finding large quantities of
new and pristine super-IO chips. I might do a new run of naked boards.
--
David Griffith
dave at 661.org
On 2019/11/30 23:32:55 -0800, jim stephens via cctalk wrote:
Here's the archive
http://www.retroarchive.org/maslin/
P112 I think is way newer than anything related though. On 11/30/2019 9:45 PM, Eric Dittman via cctalk
wrote:
> On 11/30/2019 8:34 PM, jim stephens via cctalk wrote:
>>
[snip]
Links.txt
[snip]
http://www.classiccmp.org/dunfield/img/index.htm
???? Daves Old Computers - Disk/Software Images. Boot disks for lots
???? of different vintage computers are here. It's not nearly the
???? size of Don Maslin's lost archive, but it's a start.
I don't keep up with CP/M etc but I thought I recall it being
announced that Don Maslin's lost archive had been recovered?
2:40 p.m.
New subject: P112 [Don Maslin Archive]
On Sun, 1 Dec 2019, David Griffith via cctalk wrote:
On the 8" drive question, I haven't done it
myself, but I've received
reports from people who've successfully used them with the P112. It
involves pretending they're HD 5.25" drives and using a hardware shim to
deliver more current when writing to tracks greater than X. I don't
recall the specifics though.
As bill mentioned, though, 1.2M drives have 80 tracks; 8" have 77 tracks.
Otherwise, the 1.2M is a 5.25" version of an 8" drive in most respects.
In fact, the first one that I ever got (at a swap) was a Mitsubishi, that
had a 50 pin connector!
"TG43"
"Standard" (well, they sorta almost were) 8" drives, when they are on a
track greater then cylinder #43 use a reduced current when writing.
Some drives expect a signal on pin 2 from the FDC to tell them; some have
internal support for it, with the drive keeping track of the current
track, and don't need that signal (such as Shugart 860, and the later
versions of Tandon 848 (1E?, 2E?))
Disk controllers intended for 8" drives will usually have it.
PC controllers do not include it.
The DBIT FDADAP adapter (that I think Bill is using) handles it (in
addition to the 34 pin to 50 pin cable pinouts) Recent ones also have a 2
digit display of track number. Seek errors are not unknown,
especially if the track to track step time is faster than the drive can
keep up with (cf. Qume 142), so it is sometimes necessary to do a seek to
track 0 and count steps back in again, to correct track number.
TG43 is absolutely NOT needed for reading.
--
Grumpy Ol' Fred cisin at xenosoft.com
6:55 p.m.
New subject: P112 [Don Maslin Archive]
On 12/1/19 2:40 PM, Fred Cisin via cctalk wrote:
TG43 is absolutely NOT needed for reading.
TG43 is also referred to as "RWC" reduced write current. Mostly
useful for FM recording; MFM uses precompensation, which subtly shifts
the timing of write pulses.
--Chuck
11:09 a.m.
New subject: P112 [Don Maslin Archive]
Here's the archive
http://www.retroarchive.org/maslin/
HERE is the archive
https://www.computerhistory.org/collections/catalog/102703903
Another curator and I went down to San Diego and both ended up with heat exhaustion
recovering it from a storage unit in the middle of summer.
you're welcome..
11:26 a.m.
New subject: P112 [Don Maslin Archive]
On December 1, 2019 11:09:29 AM PST, Al Kossow via cctalk <cctalk at classiccmp.org>
wrote:
Thanks. I remember that summer when I sold several of Don's machines for his niece.
--
David Griffith
dave at 661.org
Here's the archive
http://www.retroarchive.org/maslin/
HERE is the archive
https://www.computerhistory.org/collections/catalog/102703903
Another curator and I went down to San Diego and both ended up with
heat exhaustion
recovering it from a storage unit in the middle of summer.
you're welcome.. 
12:16 p.m.
New subject: P112 [Don Maslin Archive]
On Sun, Dec 1, 2019, 12:09 PM Al Kossow via cctalk <cctalk at classiccmp.org>
wrote:
Thank you.
Btw, how does one access this archive?
Warner
Here's the archive
http://www.retroarchive.org/maslin/
HERE is the archive
https://www.computerhistory.org/collections/catalog/102703903
Another curator and I went down to San Diego and both ended up with heat
exhaustion
recovering it from a storage unit in the middle of summer.
you're welcome..
1:07 p.m.
New subject: P112 [Don Maslin Archive]
On Sun, 1 Dec 2019, Warner Losh via cctalk wrote:
On Sun, Dec 1, 2019, 12:09 PM Al Kossow via cctalk
<cctalk at classiccmp.org>
wrote:
Thank you.
Btw, how does one access this archive?
You don't.
g.
--
Proud owner of F-15C 80-0007
http://www.f15sim.com - The only one of its kind.
http://www.diy-cockpits.org/coll - Go Collimated or Go Home.
Some people collect things for a hobby. Geeks collect hobbies.
ScarletDME - The red hot Data Management Environment
A Multi-Value database for the masses, not the classes.
http://scarlet.deltasoft.com - Get it _today_!
Here's the archive
http://www.retroarchive.org/maslin/
HERE is the archive
https://www.computerhistory.org/collections/catalog/102703903
Another curator and I went down to San Diego and both ended up with heat
exhaustion
recovering it from a storage unit in the middle of summer.
you're welcome..
1:06 p.m.
New subject: P112 [Don Maslin Archive]
On Sun, 1 Dec 2019, Al Kossow via cctalk wrote:
It looks like a really cool list of stuff that nobody has access to...
Thanks!
g.
--
Proud owner of F-15C 80-0007
http://www.f15sim.com - The only one of its kind.
http://www.diy-cockpits.org/coll - Go Collimated or Go Home.
Some people collect things for a hobby. Geeks collect hobbies.
ScarletDME - The red hot Data Management Environment
A Multi-Value database for the masses, not the classes.
http://scarlet.deltasoft.com - Get it _today_!
Here's the archive
http://www.retroarchive.org/maslin/
HERE is the archive
https://www.computerhistory.org/collections/catalog/102703903
Another curator and I went down to San Diego and both ended up with heat exhaustion
recovering it from a storage unit in the middle of summer. 
30 Nov
30 Nov
4:37 p.m.
Don't 8 inch drives have 77 tracks?
Dwight
________________________________
From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Bill Gunshannon via
cctalk <cctalk at classiccmp.org>
Sent: Saturday, November 30, 2019 9:22 AM
To: emanuel stiebler <emu at e-bbes.com>; General Discussion: On-Topic and Off-Topic
Posts <cctalk at classiccmp.org>
Subject: Re: P112
On 11/30/19 9:15 AM, emanuel stiebler wrote:
On 2019-11-29 19:01, Bill Gunshannon via cctalk
wrote:
I was waiting to see if there were any P112 users first,
I'll start with the simple and funny one. If i run FORMAT
it formats all 80 tracks. :-) Seems like the definition
for an 8" disk as selected in the config menu is just plain
wrong. Of course, once it formats all 80 :-) tracks any
attempt to access it, like a DIR, just returns "sector not
found".
bill
Let's try again with the right name in the Subject line!
It's not really classic (although it does try to pretend to be
but does anyone here do anything with the P112 SBC? I am trying to
get 8" disks running on it but I am seeing some rather strange behavior.
You should probably describe the "strange behavior". There is a chance,
it isn't a P112 problem?
4:54 p.m.
On Sun, 1 Dec 2019, dwight via cctalk wrote:
Don't 8 inch drives have 77 tracks?
YES.
Although 8" "emulation" sometimes cheats and uses 80.
And some users with drives without a physical stop tried to squeeze a few
more tracks (and 41,42 on 360K)
The inability to read those "extra" tracks on a different drive didn't
show up until the disk was nearly full (inner tracks are normally last
allocated)
SA400 was 35 track (TRS80, and SA390 Apple)
Q: how many tracks are the HP formats?
6:40 p.m.
On 11/29/2019 4:01 PM, Bill Gunshannon via cctalk wrote:
Let's try again with the right name in the Subject
line!
It's not really classic (although it does try to pretend to be
but does anyone here do anything with the P112 SBC? I am trying to
get 8" disks running on it but I am seeing some rather strange behavior.
bill
I found a couple of links to the site I bought my system from:
https://661.org/p112/
https://661.org/p112/files/p112-doc.pdf
http://stack180.com/
Original source
http://members.iinet.net.au/~daveb/p112/p112.html
Figured it would be useful to have some links when people stumble by
this thread in a few years.? Hopefully in that case all are in
archive.org with info stored.
Thanks
Jim
2 Dec
2 Dec
8:31 a.m.
On 11/29/19 7:01 PM, Bill Gunshannon via cctalk wrote:
Let's try again with the right name in the Subject
line! It's not
really classic (although it does try to pretend to be but does anyone
here do anything with the P112 SBC? I am trying to get 8" disks
running on it but I am seeing some rather strange behavior.
Well, the P112 is a
classic of sorts, being a mid-1990's design (much
like the CPU280 from Tilmann Reh that I 'revived' a couple of years
back, and still have PCBs leftover.... :-) ).? The P112 kit was, up
until a few months ago, still available from David Griffith (661.org,
which you've already found).? I bought two while I was buying a few
years back, and built up one of them, which I still use a bit with a
GIDE from Terry.? I am actually planning to port the TRS-80 Model 4's
LS-DOS 6 to it for fun, but haven't had time to work too much with it.?
I was actually thinking about fabbing a few boards to try out faster
Z80182 chips (officially there is a 33MHz version that has been
overclocked by some to well over that speed) rather than risk
desoldering the 16MHz '182 from one of the two kit boards I bought, so,
for David Griffith's benefit, I would be interested in a bare board or
three myself if he decides to fab some.? Sourcing the SuperIO and doing
the fine-pitch SMD soldering will be a bit of a challenge, but worth it
I believe.
As far as 8-inch drives are concerned, you would need to do exactly
everything you would need to do to hook up an 8-inch drive to a PC,
since the P112 uses a PC SuperIO chip for the FDC, and the floppy
headers have PC pinouts and signal meanings (unlike the CPU280.....).?
The dBit FDADAP or similar would be needed to generate TG43 as well as
translate the pinout correctly.? I haven't tried single-density support
on the P112, so don't know if that would work or not, but the SuperIO
chip used should be able to do that.
1:05 p.m.
On 12/2/19 11:31 AM, Lamar Owen wrote:
As far as 8-inch drives are concerned, you would need to do exactly
everything you would need to do to hook up an 8-inch drive to a PC,
since the P112 uses a PC SuperIO chip for the FDC, and the floppy
headers have PC pinouts and signal meanings (unlike the CPU280.....).
The dBit FDADAP or similar would be needed to generate TG43 as well as
translate the pinout correctly.? I haven't tried single-density support
on the P112, so don't know if that would work or not, but the SuperIO
chip used should be able to do that.
Well, I have the dBit FDADAP. Works great. I have used them
before on a PC to access PDP-11 disks from PUTR and E11. The
P112 claims to support 8" but I am finding it unlikely. If it
(well, at least the OSes it runs) don't even know it only has
77 tracks I can't see how anyone has done 8" disks on it.
And then I went on to try the GIDE. I can't get FDISK to
create partitions of any kind.
I get
Command (h for help) : n
Partition number (1-8) : 1
First cylinder (1-17455, default 1) : 1
Value out of range
And that is what I get no matter what value I enter.
Why am I getting this sneaking suspicion that none of this
stuff actually works?
bill
1:55 p.m.
Well, I have the dBit FDADAP. Works great. I have
used them before
on a PC to access PDP-11 disks from PUTR and E11. The P112 claims to
support 8" but I am finding it unlikely. If it (well, at least the
OSes it runs) don't even know it only has 77 tracks I can't see how
anyone has done 8" disks on it.
I went spelunking in the ROM and BIOS sources the other day, and I don't
see any 8" drive stuff in there at all -- it's all 3.5" and 5.25". I
looked at FORMAT too. Am I looking at old code?
Why am I getting this sneaking suspicion that none of
this stuff
actually works?
I haven't had mine out in a while, but last I did, the GIDE did work.
Seems like there was some ordering of operations on HD setup that I did
wrong the first time.
It doesn't help that there are no docs for the thing other than whatever
paper came with it.
Sanity check your software versions? Mixing and matching variants can
be problematic since there are several generations and several forks of
the P112 and GIDE stuff; and there's at least one version of FORMAT
that's reputed to have a serious bug.
De
5:11 p.m.
On 12/2/19 4:55 PM, Dennis Boone via cctalk wrote:
The menu you get when you hit Escape on startup has an option
for setting a floppy as 8". Mine is ROM 5.7 which I believe
is the next to last. Unless it is different than the other
CP/M systems I have FORMAT should have no hardware dependent
code in it. It was the OS that tracked and controlled what
the underlying format of the floppies were.
The GIDE seems to work. It appears to be FDISK that is broken.
Given that, unless people had custom versions of FDISK I fail
to see how anyone set up a hard disk on a P112.
Well, I have
the dBit FDADAP. Works great. I have used them before
on a PC to access PDP-11 disks from PUTR and E11. The P112 claims to
support 8" but I am finding it unlikely. If it (well, at least the
OSes it runs) don't even know it only has 77 tracks I can't see how
anyone has done 8" disks on it.
I went spelunking in the ROM and BIOS sources the other day, and I don't
see any 8" drive stuff in there at all -- it's all 3.5" and 5.25". I
looked at FORMAT too. Am I looking at old code? Why am I getting this sneaking suspicion that
none of this stuff
actually works?
I haven't had mine out in a while, but last I did, the GIDE did work.
Seems like there was some ordering of operations on HD setup that I did
wrong the first time.
It doesn't help that there are no docs for the thing other than whatever
paper came with it.
Thus the reason for me searching places like this for help. :-)
Sanity check your software versions? Mixing and matching variants can
be problematic since there are several generations and several forks of
the P112 and GIDE stuff; and there's at least one version of FORMAT
that's reputed to have a serious bug.
No mix or match. Just using the images provided on the CD that
came with it. FORMAT works OK for 3.5" disks. I have had no
luck trying to FORMAT 5.25" or 8" floppies. And I can't even
get that far on a hard disk.
bill
5:36 p.m.
The menu you get when you hit Escape on startup has an
option for
setting a floppy as 8". Mine is ROM 5.7 which I believe is the next
to last. Unless it is different than the other CP/M systems I have
FORMAT should have no hardware dependent code in it. It was the OS
that tracked and controlled what the underlying format of the
floppies were.
That's literally the only thing I could find. I can't see any place
where a DPB is defined for an 8" drive. If the DPB is wrong, FORMAT
will misbehave. I'd be utterly unsurprised if more parameters than just
cylinder count weren't wrong.
You might try examining the active DPBs for the system to see what all
it's using, and even correct it with a monitor or debugger.
> I haven't had mine out in a while, but last I
did, the GIDE did
> work. Seems like there was some ordering of operations on HD setup
> that I did wrong the first time.
The more I think about this, the more I think maybe the thing that
"fixed" mine was wiping the drive before trying FDISK.
You didn't show the full FDISK session, or a listing of what partitions
it thinks are there to begin with. That might help shake free thoughts
from others.
Does dgriffi lurk on this list?
De
6:10 p.m.
On 12/2/19 8:36 PM, Dennis Boone via cctalk wrote:
I put 8" on a back burner for the moment.
Wiping with what.
The menu you
get when you hit Escape on startup has an option for
setting a floppy as 8". Mine is ROM 5.7 which I believe is the next
to last. Unless it is different than the other CP/M systems I have
FORMAT should have no hardware dependent code in it. It was the OS
that tracked and controlled what the underlying format of the
floppies were.
That's literally the only thing I could find. I can't see any place
where a DPB is defined for an 8" drive. If the DPB is wrong, FORMAT
will misbehave. I'd be utterly unsurprised if more parameters than just
cylinder count weren't wrong.
You might try examining the active DPBs for the system to see what all
it's using, and even correct it with a monitor or debugger. > I haven't had mine out in a while, but
last I did, the GIDE did
> work. Seems like there was some ordering of operations on HD setup
> that I did wrong the first time.
The more I think about this, the more I think maybe the thing that
"fixed" mine was wiping the drive before trying FDISK.
You didn't show the full FDISK session, or a listing of what partitions
it thinks are there to begin with. That might help shake free thoughts
from others.
It starts out with no partitions and claims the partition table
is not a valid P112 table. The "w" command fixes that but the
table is still empty. Interestingly enough, a 64M CF in an IDE
adapter works with FDISK. but then when I try to "INIT" it under
RSX180 it prints a stream of garbage on the screen and does nothing
to the disk/CF.
Not sure how much longer I am likely to keep beating my head
against the wall.
bill
13 Dec
13 Dec
3:14 a.m.
On 12/2/19 6:10 PM, Bill Gunshannon via cctalk wrote:
It starts out with no partitions and claims the
partition table
is not a valid P112 table. The "w" command fixes that but the
table is still empty. Interestingly enough, a 64M CF in an IDE
adapter works with FDISK. but then when I try to "INIT" it under
RSX180 it prints a stream of garbage on the screen and does nothing
to the disk/CF.
You found a bug in the INIt program: it was supposed to output an error
message saying that the partition is bigger than 32M and then exit,
but some reason the address of the message went to the wrong register
pair, and I never tested for that case. I've uploaded a fix, as well as
new floppy images.
Note also that FDISK is a rather old program, and as such will not
work properly with modern drives larger than 256Mb, and it doesn't
do LBA either (time to write a new version?).
Hector.
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aek＠bitsavers.org -
bill.gunshannon＠hotmail.com -
billdegnan＠gmail.com -
cclist＠sydex.com -
cctalk＠beyondthepale.ie -
cisin＠xenosoft.com -
dave＠661.org -
dittman＠dittman.net -
dkelvey＠hotmail.com -
drb＠msu.edu -
emu＠e-bbes.com -
geneb＠deltasoft.com -
imp＠bsdimp.com -
jwsmail＠jwsss.com -
lowen＠pari.edu -
peraza＠newsguy.com -
rich.cini＠verizon.net -
silent700＠gmail.com -
tingox＠gmail.com -
tom＠figureeightbrewing.com