On 4/23/22 13:12, Fred Cisin via cctalk wrote:
> On Sat, 23 Apr 2022, Craig Ruff via cctech wrote:
>> The P112's floppy controller is the one in the SMSC FDC37C665IR
>> SuperIO chip. The data sheet states it is a 2.88 MB "Licensed CMOS
>> 765B Floppy Disk Controller" and claims 100% IBM compatibili
On Sat, 23 Apr 2022, Craig Ruff via cctech wrote:
The P112's floppy controller is the one in the SMSC FDC37C665IR SuperIO
chip. The data sheet states it is a 2.88 MB "Licensed CMOS 765B Floppy
Disk Controller" and claims 100% IBM compatibility (for what that's
worth).
2.8M (it is not "2.88" u
The P112's floppy controller is the one in the SMSC FDC37C665IR SuperIO chip.
The data sheet states it is a 2.88 MB "Licensed CMOS 765B Floppy Disk
Controller" and claims 100% IBM compatibility (for what that's worth).
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 t
On 12/3/19 11:00 PM, Lamar Owen wrote:
>
>
> On Dec 3, 2019 8:55 PM, Bill Gunshannon via cctech
> wrote:
>
> Especially RSX180 as I have some other plans for that one.
>
> RSX180? Learn about something new everyday! This tidbit alone was
> worth watching the thread.
>
Well, glad it h
Hi Bill,
On Wed, Dec 04, 2019 at 01:06:39AM +, Bill Gunshannon via cctalk wrote:
> On 12/3/19 7:51 PM, Craig Ruff via cctech wrote:
> > Just in case someone else hasn't already responded, the P112 does not use
> > DOS style fdisk partitioning for a hard disk. It is done in the BIOS image,
>
On 12/3/19 8:15 PM, Fred Cisin via cctech wrote:
> On Wed, 4 Dec 2019, Bill Gunshannon via cctech wrote:
>> Along this line I have solved one problem. I mentioned INIT in
>> RSX180 printing gibberish on the screen when trying to init a
>> hard disk partition where it had worked on a floppy. Probl
On Wed, 4 Dec 2019, Bill Gunshannon via cctech wrote:
Along this line I have solved one problem. I mentioned INIT in
RSX180 printing gibberish on the screen when trying to init a
hard disk partition where it had worked on a floppy. Problem
was the size of the partitions. I had tried just makin
On 12/3/19 7:51 PM, Craig Ruff via cctech wrote:
> Just in case someone else hasn't already responded, the P112 does not use DOS
> style fdisk partitioning for a hard disk. It is done in the BIOS image, and
> then the logical disks have to be initialized. This is described in the "P112
> GIDE Co
Just in case someone else hasn't already responded, the P112 does not use DOS
style fdisk partitioning for a hard disk. It is done in the BIOS image, and
then the logical disks have to be initialized. This is described in the "P112
GIDE Construction.pdf" document.
I've only used 3.5" floppies,
On 12/2/19 8:36 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
> 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
On 12/2/19 4:55 PM, Dennis Boone via cctalk wrote:
> > 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
> 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 ha
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 meanin
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 rathe
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
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 writ
On Sun, 1 Dec 2019, Warner Losh via cctalk wrote:
On Sun, Dec 1, 2019, 12:09 PM Al Kossow via cctalk
wrote:
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 D
On Sun, 1 Dec 2019, Al Kossow via cctalk wrote:
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
On Sun, Dec 1, 2019, 12:09 PM Al Kossow via cctalk
wrote:
>
> > 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
>
On December 1, 2019 11:09:29 AM PST, Al Kossow via cctalk
wrote:
>
>> 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
>hea
> 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'
On December 1, 2019 9:52:03 AM PST, jim stephens via cctalk
wrote:
>
>
>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:
>>> On 11/30/2019 9:45 PM, Eric Dittman via cctalk wrote:
On 11/30/2019 8:34 PM, jim stephens via c
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:
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/dunfie
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
On 11/30/2019 8:34 PM, jim stephens via cctalk wrote:
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 buil
On Sat, Nov 30, 2019, 9:34 PM jim stephens via cctalk
wrote:
>
>
> 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”
> drive
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 f
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
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
On 11/30/19 8:28 PM, Fred Cisin via cctalk wrote:
>>> 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 som
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 tra
On 11/30/19 7:37 PM, dwight via cctalk wrote:
> Don't 8 inch drives have 77 tracks?
Give that man a cigar. Apparently the P112 doesn't know the
format of 8" disks even though it has an option to set a drive
as 8" in the config.
bill
On 11/30/19 7:16 PM, Fred Cisin via cctalk wrote:
> 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
>> wro
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
Don't 8 inch drives have 77 tracks?
Dwight
From: cctalk on behalf of Bill Gunshannon via
cctalk
Sent: Saturday, November 30, 2019 9:22 AM
To: emanuel stiebler ; General Discussion: On-Topic and
Off-Topic Posts
Subject: Re: P112
On 11/30/19 9:15 AM, em
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
On 11/30/19 9:15 AM, emanuel stiebler wrote:
> 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 tryi
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
> On 12/12/18 6:58 AM, David Griffith via cctalk wrote:
>
> > That's got me thinking... Suppose I redesign the P112 board to take a
> > Z280 CPU. Would you guys go for it? I'd like to come up with a way
> > to use a socketed CPU or put a surface-mounted chip on a carrier board
> > to allow greate
This?
http://searle.hostei.com/grant/MonitorKeyboard/index.html
It's much more efficient for a poster to provide URLs than for umpteen
others to have to go off searching.
You're welcome.
On Wed, Dec 12, 2018 at 2:04 PM allison via cctalk
wrote:
> >> That is the easy part, where is the 99 cent
On 12/12/18 6:58 AM, David Griffith via cctalk wrote:
My reply is at the bottom.
Please put your reply there too.
On Tue, 4 Dec 2018, ben via cctalk wrote:
On 12/4/2018 1:17 PM, Tony Nicholson via cctalk wrote:
Hello David
I saw your posting on the cctalk mailing list regarding RSX180.
It is
>> That is the easy part, where is the 99 cent dumb terminal to go with it?
>> Ben.
>
Ben,
look at Grant Searle's display system, not the Z80 CP/M but his three
chip display system.
Take two Atmel Atmega328Ps and a 74ls166 monitor and P2 keyboard required.
That yields a 24line x 80char display t
On 12/12/2018 07:58 AM, David Griffith via cctalk wrote:
>
> My reply is at the bottom.
> Please put your reply there too.
> On Tue, 4 Dec 2018, ben via cctalk wrote:
>> On 12/4/2018 1:17 PM, Tony Nicholson via cctalk wrote:
>>> Hello David
>>>
>>> I saw your posting on the cctalk mailing list rega
On 12/05/2018 05:00 PM, Torfinn Ingolfsen via cctalk wrote:
> There is a "contact" link on this page:
> http://p112.sourceforge.net/index.php?rsx180
> Maybe it works.
> On Tue, Dec 4, 2018 at 6:48 PM Al Kossow via cctalk
> wrote:
>>
>>
>> On 12/4/18 7:51 AM, Dennis Boone via cctalk wrote:
>>> > T
There is a "contact" link on this page:
http://p112.sourceforge.net/index.php?rsx180
Maybe it works.
On Tue, Dec 4, 2018 at 6:48 PM Al Kossow via cctalk
wrote:
>
>
>
> On 12/4/18 7:51 AM, Dennis Boone via cctalk wrote:
> > > That's all I could find, too. If anyone knows where the source might
>
On 12/4/2018 1:17 PM, Tony Nicholson via cctalk wrote:
Hello David
I saw your posting on the cctalk mailing list regarding RSX180.
It is Hector Peraza that's been tinkering with this. He intends making the
full source-code available via SourceForge or GitHub but is still working
on preliminary
Hello David
I saw your posting on the cctalk mailing list regarding RSX180.
It is Hector Peraza that's been tinkering with this. He intends making the
full source-code available via SourceForge or GitHub but is still working
on preliminary web pages and documenting etc. No doubt he will provide
On 12/4/18 7:51 AM, Dennis Boone via cctalk wrote:
> > That's all I could find, too. If anyone knows where the source might
> > be or stumbles on it, I would definitely be interested as well.
>
> I think that's Hector Peraza's site. His email address is listed; you
> could try writing to hi
> That's all I could find, too. If anyone knows where the source might
> be or stumbles on it, I would definitely be interested as well.
I think that's Hector Peraza's site. His email address is listed; you
could try writing to him.
De
On 12/4/18 10:28 AM, Warner Losh wrote:
On Tue, Dec 4, 2018 at 7:45 AM Bill Gunshannon via cctalk
mailto:cctalk@classiccmp.org>> wrote:
On 12/4/18 9:28 AM, allison via cctalk wrote:
> On 12/04/2018 04:26 AM, David Griffith via cctalk wrote:
>> I don't know who did it, but here's a video of a P
On Tue, Dec 4, 2018 at 7:45 AM Bill Gunshannon via cctalk <
cctalk@classiccmp.org> wrote:
>
> On 12/4/18 9:28 AM, allison via cctalk wrote:
> > On 12/04/2018 04:26 AM, David Griffith via cctalk wrote:
> >> I don't know who did it, but here's a video of a P112 running RSX:
> >> https://www.youtube.
On 12/4/18 9:28 AM, allison via cctalk wrote:
> On 12/04/2018 04:26 AM, David Griffith via cctalk wrote:
>> I don't know who did it, but here's a video of a P112 running RSX:
>> https://www.youtube.com/watch?v=5s6IOCCk3Uw
>>
>> If the creator of this thing is reading, I'd very much like to get my
On 12/04/2018 04:26 AM, David Griffith via cctalk wrote:
>
> I don't know who did it, but here's a video of a P112 running RSX:
> https://www.youtube.com/watch?v=5s6IOCCk3Uw
>
> If the creator of this thing is reading, I'd very much like to get my
> hands on RSX-180 and put it up on the P112 page a
David Griffith via cctalk wrote:
>
> On Mon, 3 Dec 2018, Joe Smith via cctech wrote:
> > Are there any boards available or rom monitor updates?
>
> No more boards are available. This is primarily due to difficulty in
> getting sufficient quantities of brand-new super-IO chips. The fabber I
>
On Mon, 3 Dec 2018, Joe Smith via cctech wrote:
Are there any boards available or rom monitor updates?
No more boards are available. This is primarily due to difficulty in
getting sufficient quantities of brand-new super-IO chips. The fabber I
used has problems with using pulls because th
On Mon, 9 Apr 2018, Mark G Thomas via cctalk wrote:
Hi Bill,
On Sun, Apr 08, 2018 at 12:36:35AM +, Bill Gunshannon via cctalk wrote:
It's not really Classic Hardware, but it does run some pretty classic
OSes. Anybody here working with the P112? I have had a couple for
ages but never had
Hi Bill,
On Sun, Apr 08, 2018 at 12:36:35AM +, Bill Gunshannon via cctalk wrote:
>
> It's not really Classic Hardware, but it does run some pretty classic
> OSes. Anybody here working with the P112? I have had a couple for
> ages but never had time to play with them. I see them now as a
>
On 2018-04-08 08:37, Bill Gunshannon via cctalk wrote:
>
> None of the disks created with winrawwrite work. I am going to
> assume at this point that USB floppies can not be used to build these
> images. I have a dos box with a real floppy interface but moving stuff
> to it is not easy. (time to
On Sun, 8 Apr 2018, Bill Gunshannon via cctalk wrote:
I have no idea of the format. I got the images and rawrite.exe and
told the computer to make them. They were unusable when I used
a USB External floppy but worked fine when I used a real internal
floppy.
I need to get the systems running b
On Sun, 8 Apr 2018, Fred Cisin via cctalk wrote:
Should be fun.
Is the FDC a 765 variant?
or a WD 179x variant?
On Sun, 8 Apr 2018, Bill Gunshannon via cctalk wrote:
SMC 37C651. Supports 500 Kb/s, 300 Kb/s and 250 Kb/s Data Rates.
Something else we lost with the PC.
That's a 765 variant.
Should have left it the way it was and have people set the Drive Select
themselves.
Radio Shack used a different approach to drive select by cable instead
of making use of the well documented drive select on the drive.
Radio shack jumpered all drive selects on on the drive, and pulled
pins in the
Should be fun.
Is the FDC a 765 variant?
or a WD 179x variant?
On Sun, 8 Apr 2018, Bill Gunshannon via cctalk wrote:
SMC 37C651. Supports 500 Kb/s, 300 Kb/s and 250 Kb/s Data Rates.
Something else we lost with the PC.
That's a 765 variant. Made by several companies, even WD!
Most of those
On 04/08/2018 04:11 PM, Bill Gunshannon via cctalk wrote:
>
> On 04/08/2018 02:11 PM, Fred Cisin wrote:
> Radio Shack used a different approach to drive select by cable instead
> of making use of the well documented drive select on the drive.
> Radio shack jumpered all drive selects on on the driv
I have a operational P112 with 3.5" floppies, GIDE/CF and CD-ROM. Do you know
which ROM you have installed?
On 04/08/2018 02:11 PM, Fred Cisin wrote:
I do have to admit that I find it hard to believe that the cable to
the
floppy can actually make a difference.
>>> A minor point, . . .
>>> On 5150/5160/5170, the SECOND drive is a straight cable, FIRST drive
>>> is crossed. Thus, drive A
> I see one about partitioning but not sure how one gets the FDISK
> utility onto a bootable P112 floppy.
The cpmtools has a diskdef for the p112 formats. One could therefore
copy from images to actual floppies, assuming the needed hardware can be
coaxed into connectivity with a supported os.
I do have to admit that I find it hard to believe that the cable to the
floppy can actually make a difference.
A minor point, . . .
On 5150/5160/5170, the SECOND drive is a straight cable, FIRST drive
is crossed. Thus, drive A: is at the end of the cable, B: is in the
middle of the cable.
On S
On 04/08/2018 01:34 PM, Fred Cisin via cctalk wrote:
> On Sun, 8 Apr 2018, Bill Gunshannon via cctalk wrote:
>> I do have to admit that I find it hard to believe that the cable to the
>> floppy can actually make a difference.
>
> A minor point, . . .
> On 5150/5160/5170, the SECOND drive is a str
On Sun, 8 Apr 2018, Bill Gunshannon via cctalk wrote:
I do have to admit that I find it hard to believe that the cable to the
floppy can actually make a difference.
A minor point, . . .
On 5150/5160/5170, the SECOND drive is a straight cable, FIRST drive is
crossed. Thus, drive A: is at the e
On 04/08/2018 01:02 PM, Dennis Boone wrote:
> > I am going to go back now and retest a bunch of the floppy drives and
> > cables to see if there really is a problem or if it was just the
> > images. Of course, this means my original floppy is bad so I need to
> > find another copy as I t
> I am going to go back now and retest a bunch of the floppy drives and
> cables to see if there really is a problem or if it was just the
> images. Of course, this means my original floppy is bad so I need to
> find another copy as I think the stuff I need to use the GIDE was on
> there. I
Success!!! Up to a point.
I have it booting on a floppy. I have confirmed that you can,
apparently, not make disk images with an external USB Floppy
drive.
I am going to go back now and retest a bunch of the floppy drives
and cables to see if there really is a problem or if it was just the
i
Some more data points.
I have tried four different floppy cables and 6 different floppy
drives (different brands, as well).
I had one combination where it actually booted the P112/GIDE
floppy. Got sector read errors. But wait, it gets better. I rebooted
about a half dozen times. The errors
On 04/08/2018 06:12 AM, Torfinn Ingolfsen via cctalk wrote:
> I have a P112 (bought as a kit) which I have assembled and plyed with a bit.
> Your description doesn't mention it, so we need more details:
> - did you build the P112 yourself, or did it come pre-assembled?
Bought it assembled and te
I have a P112 (bought as a kit) which I have assembled and plyed with a bit.
Your description doesn't mention it, so we need more details:
- did you build the P112 yourself, or did it come pre-assembled?
- has it been working before? Or is this your first time trying it?
- which version of the ROM
I'd prefer a full kit as well, but if you'd rather produce just the boards
with the SMD stuff already in place, that's OK with me, too.
I'm new to the list; how much would the full kit or board cost?
On Wed, Jul 26, 2017 at 5:02 AM, Fredrik Axtelius via cctalk <
cctalk@classiccmp.org> wrote:
> I
I want one... Full kit preferred.
--frax
On Wed, Jul 26, 2017 at 10:35 AM, David Griffith via cctalk <
cctalk@classiccmp.org> wrote:
>
> I've sold the last of my P112 boards. Is there still any interest in P112
> kits or boards?
>
> --
> David Griffith
> d...@661.org
>
> A: Because it fouls the
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