MFM Discuss

1–30 of 96

This groups is for support and discussion of the MFM disk reader/emulator project http://www.pdp8online.com/mfm.

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Jay Cotton, David Gesswein2

Jun 28

MFM Emulator ready bit

The read line goes low when the drive is selected. Assuming your using --drive 1 P7 sets what drive

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MFM Emulator ready bit

The read line goes low when the drive is selected. Assuming your using --drive 1 P7 sets what drive

Jun 28

John Dammeyer, David Gesswein4

Jun 2

On Thu, Jun 02, 2022 at 03:22:11PM -0700, John Dammeyer wrote: > Oh and I'm running the entire

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On Thu, Jun 02, 2022 at 03:22:11PM -0700, John Dammeyer wrote: > Oh and I'm running the entire

Jun 2

Forgotten Machines, … David Gesswein9

May 31

Building ST506 to CDC "Finch" drive hardware interface

On Tue, May 31, 2022 at 01:01:25PM -0700, Forgotten Machines wrote: > Thanks for this insight,

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Building ST506 to CDC "Finch" drive hardware interface

On Tue, May 31, 2022 at 01:01:25PM -0700, Forgotten Machines wrote: > Thanks for this insight,

May 31

Al Kossow, David Gesswein2

May 3

acb 4000 bad block behavior

On Tue, May 03, 2022 at 12:54:22PM -0700, Al Kossow wrote: > I just read a quantum 540 that was

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acb 4000 bad block behavior

On Tue, May 03, 2022 at 12:54:22PM -0700, Al Kossow wrote: > I just read a quantum 540 that was

May 3

ich.c...@gmail.com, David Gesswein6

Apr 30

Formating error - Drive 0 Cyl X -> Y select 1, head 0 dirty f

On Sat, Apr 30, 2022 at 02:03:52PM -0700, ich.c...@gmail.com wrote: > Other case : > Just this

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Formating error - Drive 0 Cyl X -> Y select 1, head 0 dirty f

On Sat, Apr 30, 2022 at 02:03:52PM -0700, ich.c...@gmail.com wrote: > Other case : > Just this

Apr 30

Marko Štamcar, Joan Touzet4

Apr 27

Iskra Delta Triglav (Trident) computer [Slovenia/Yugoslavia] - MFM drives archived using this hardware

Hello Joan, thanks for making the MFM reader/emulator + prepared Beaglebone so easily available - our

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Iskra Delta Triglav (Trident) computer [Slovenia/Yugoslavia] - MFM drives archived using this hardware

Hello Joan, thanks for making the MFM reader/emulator + prepared Beaglebone so easily available - our

Apr 27

Forgotten Machines, David Gesswein2

Apr 12

Coaxing more sectors & tracks from a bad ST-251

On Tue, Apr 12, 2022 at 02:03:44AM -0700, Forgotten Machines wrote: > > ./mfm_util -I -t ../

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Coaxing more sectors & tracks from a bad ST-251

On Tue, Apr 12, 2022 at 02:03:44AM -0700, Forgotten Machines wrote: > > ./mfm_util -I -t ../

Apr 12

Forgotten Machines, … Joan Touzet5

Apr 10

Using the BBGW MicroSD card for direct-access emulation files

Looks good. On 2022-04-10 6:24 pm, Forgotten Machines wrote: Thank you both, David & Joan for

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Using the BBGW MicroSD card for direct-access emulation files

Looks good. On 2022-04-10 6:24 pm, Forgotten Machines wrote: Thank you both, David & Joan for

Apr 10

Paul Devine, David Gesswein5

Mar 12

Help with low level format on Victor 9000

Also, should have started with a HUGE thank you to David. Thanks so much for all your great work in

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Help with low level format on Victor 9000

Also, should have started with a HUGE thank you to David. Thanks so much for all your great work in

Mar 12

Terry Fox, … David Gesswein8

Feb 12

Using HDD emulator in a Kaypro 10?

On Sat, Jan 08, 2022 at 04:09:43PM -0800, Brian Jones wrote: > Can anyone that's used this

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Using HDD emulator in a Kaypro 10?

On Sat, Jan 08, 2022 at 04:09:43PM -0800, Brian Jones wrote: > Can anyone that's used this

Feb 12

Per Mårtensson, … David Gesswein30

Jan 28

Help with extract data from a Micropolis driver 1304

Hi david, Did actully got it to work. Post you later, but all is fine :-) Per fredag 28 januari 2022

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Help with extract data from a Micropolis driver 1304

Hi david, Did actully got it to work. Post you later, but all is fine :-) Per fredag 28 januari 2022

Jan 28

Tom Stepleton, … Forgotten Machines9

Jan 8

--ignore_seek_errors behaviour

A smart observation, I should have thought of that! But I've already ordered, and if I bought in

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--ignore_seek_errors behaviour

A smart observation, I should have thought of that! But I've already ordered, and if I bought in

Jan 8

dave....@gmail.com, David Gesswein3

12/31/21

Position of Regulator

Thanks for the prompt reply. Now for the testing... Dave G4UGM > -----Original Message----- >

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Position of Regulator

Thanks for the prompt reply. Now for the testing... Dave G4UGM > -----Original Message----- >

12/31/21

Vladimir Romanov, … Forgotten Machines7

12/29/21

MFM emulator - can't read disk

I tried different settings (default value is 50,4) --retries 100,8 --retries 200,16 No luck. I can

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MFM emulator - can't read disk

I tried different settings (default value is 50,4) --retries 100,8 --retries 200,16 No luck. I can

12/29/21

Joan Touzet, David Gesswein2

12/19/21

Un-analyzeable CDC drive image?

If you think you can take a crack at it http://www.pdp8online.com/mfm/revb/adding_new_formats.shtml

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Un-analyzeable CDC drive image?

If you think you can take a crack at it http://www.pdp8online.com/mfm/revb/adding_new_formats.shtml

12/19/21

Tim Radde, … David Gesswein16

12/15/21

Anyone try to analyze an ST-251 on a Decmate II?

If I had a spare drive to donate a board I might try it Don't want to risk messing up one of the

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Anyone try to analyze an ST-251 on a Decmate II?

If I had a spare drive to donate a board I might try it Don't want to risk messing up one of the

12/15/21

Forgotten Machines, David Gesswein5

12/13/21

C code that creates the data pulses

On Mon, Dec 13, 2021 at 09:25:39AM -0800, Forgotten Machines wrote: > David, > > Digging

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C code that creates the data pulses

On Mon, Dec 13, 2021 at 09:25:39AM -0800, Forgotten Machines wrote: > David, > > Digging

12/13/21

PC-maniak, David Gesswein21

11/16/21

MFM emulator - error trying to initialize

On Mon, Nov 15, 2021 at 05:12:35AM -0800, PC-maniak wrote: > I'm sorry I don't have any

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MFM emulator - error trying to initialize

On Mon, Nov 15, 2021 at 05:12:35AM -0800, PC-maniak wrote: > I'm sorry I don't have any

11/16/21

10/31/21

Heads up on our (DECromancer's) latest units...

Hey there, we had a complaint from a customer regarding a boot loop situation on an MFM Emulator

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Heads up on our (DECromancer's) latest units...

Hey there, we had a complaint from a customer regarding a boot loop situation on an MFM Emulator

10/31/21

Jos Dreesen, David Gesswein8

10/31/21

Any chance for a Sage / Stride controller capability ?

Not yet tried opening the other disks, will be a task for a quiet December evening... BR Jos On Sun,

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Any chance for a Sage / Stride controller capability ?

Not yet tried opening the other disks, will be a task for a quiet December evening... BR Jos On Sun,

10/31/21

geneb, David Gesswein5

9/3/21

Need a format identified...

On Fri, 3 Sep 2021, David Gesswein wrote: > Got time to look at it. Format added Superbrain. >

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Need a format identified...

On Fri, 3 Sep 2021, David Gesswein wrote: > Got time to look at it. Format added Superbrain. >

9/3/21

snhi...@gmail.com, d...@pdp8online.com7

9/2/21

Missing format for ext2emu?

Sorry - I'm in the middle of a very busy period. Won't have time to address this until next

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Missing format for ext2emu?

Sorry - I'm in the middle of a very busy period. Won't have time to address this until next

9/2/21

Convergent MightyFrame, ich.c...@gmail.com2

8/31/21

Kudos to Adrian's Digital Basement...

Thanks ... I have a MFM Reader/emulator from David and it is often not easy to explain what it does

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Kudos to Adrian's Digital Basement...

Thanks ... I have a MFM Reader/emulator from David and it is often not easy to explain what it does

8/31/21

snhi...@gmail.com, David Gesswein4

8/7/21

Track length issue when emulating 2 drives

On Sat, Aug 07, 2021 at 01:10:07PM -0700, snhi...@gmail.com wrote: > So, the > problem is

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Track length issue when emulating 2 drives

On Sat, Aug 07, 2021 at 01:10:07PM -0700, snhi...@gmail.com wrote: > So, the > problem is

8/7/21

cyb 2600, … Ethan Dicks5

8/6/21

Problem with MFM Emulator and RQDX3

On Thu, Aug 5, 2021, 19:23 David Gesswein <djg@pdp8online.com> wrote: On Thu, Aug 05, 2021 at

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Problem with MFM Emulator and RQDX3

On Thu, Aug 5, 2021, 19:23 David Gesswein <djg@pdp8online.com> wrote: On Thu, Aug 05, 2021 at

8/6/21

Terry Fox, … David Gesswein4

7/29/21

How long to create a new blank hard drive image?

Thank you David! I was confused about it doing all the select messages. In addition, I forgot that

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How long to create a new blank hard drive image?

Thank you David! I was confused about it doing all the select messages. In addition, I forgot that

7/29/21

Tim Radde, … Joan Touzet9

7/26/21

Just got my assembled "blue" board with BB attached

Thanks, someone else pointed me to eBay. Guess I had not been searching for the right name. All I see

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Just got my assembled "blue" board with BB attached

Thanks, someone else pointed me to eBay. Guess I had not been searching for the right name. All I see

7/26/21

Convergent MightyFrame, … Tim Radde4

7/21/21

Black plastic Case for MFM Emulator/Reader

Just found this discussion. Downloaded both files to try each. Probably will use the non-faceplate.

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Black plastic Case for MFM Emulator/Reader

Just found this discussion. Downloaded both files to try each. Probably will use the non-faceplate.

7/21/21

5/18/21

hd samples project

@tubetimeus trying to figure out the format of an RLL disk he received prompted me to start working

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hd samples project

@tubetimeus trying to figure out the format of an RLL disk he received prompted me to start working

5/18/21

cro memcos, … David Gesswein16

5/18/21

Init Issue on Emulator Disks noticed on Cromemco

I just tested the --initialize=Cromemco option with your code level 237 No issues now, works

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Init Issue on Emulator Disks noticed on Cromemco

I just tested the --initialize=Cromemco option with your code level 237 No issues now, works

5/18/21

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