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

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Rasz, … BBMDonut35

12/7/25

sigrok-mfm mfm decoder

Awesome work! This thing really has come a long way in a pretty short amount of time. The retro

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sigrok-mfm mfm decoder

Awesome work! This thing really has come a long way in a pretty short amount of time. The retro

12/7/25

BBMDonut, … David Gesswein10

12/7/25

MFM Emulator Updates

Hi all! I just wanted to give an update on what's been going on behind the scenes. I had to take

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MFM Emulator Updates

Hi all! I just wanted to give an update on what's been going on behind the scenes. I had to take

12/7/25

Brian Minear, … David Gesswein13

11/12/25

Trying to image Miniscribe 3425, looking for tips!

Sounds like it was wiped. On Wed, Nov 12, 2025 at 11:31:52PM +0000, Brian Minear wrote: > > Try

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Trying to image Miniscribe 3425, looking for tips!

Sounds like it was wiped. On Wed, Nov 12, 2025 at 11:31:52PM +0000, Brian Minear wrote: > > Try

11/12/25

Tim Radde, David Gesswein15

10/29/25

What might cause a write error?

I have put BSD to the side for now. I have a very basic 2.9 install but it''s missing /usr.

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What might cause a write error?

I have put BSD to the side for now. I have a very basic 2.9 install but it''s missing /usr.

10/29/25

Tim Radde, David Gesswein7

10/23/25

How does the 2nd drive connector work (J5)?

I think I have a way to use a larger image rather than just an RD50 or 51. Gonna make an RD53 of 70M

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How does the 2nd drive connector work (J5)?

I think I have a way to use a larger image rather than just an RD50 or 51. Gonna make an RD53 of 70M

10/23/25

Tim Radde, David Gesswein3

10/17/25

Trying to figure another way to get a BSD 2.9 image on to my Pro-350

I can't say if they wrap the file system or not. So I am going the create real floppies using IMD

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Trying to figure another way to get a BSD 2.9 image on to my Pro-350

I can't say if they wrap the file system or not. So I am going the create real floppies using IMD

10/17/25

d...@pdp8online.com

10/6/25

Sorry about spam

Goggles spam filter blocks a bunch of real conversations so I have to manually approve post but not

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Sorry about spam

Goggles spam filter blocks a bunch of real conversations so I have to manually approve post but not

10/6/25

Alexey Pavlenko, David Gesswein3

10/3/25

Data extraction froma Wang 2200 emu file - pointers/help

Don't think anybody without a wang will be able to figure out what its doing. Some systems do

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Data extraction froma Wang 2200 emu file - pointers/help

Don't think anybody without a wang will be able to figure out what its doing. Some systems do

10/3/25

Tim Radde, … Joan Touzet5

10/3/25

Ok, but I am pretty sure this happened because I turned the machine off and then back on quite soon

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Ok, but I am pretty sure this happened because I turned the machine off and then back on quite soon

10/3/25

ich.c...@gmail.com, David Gesswein5

9/19/25

Bad harddisc controller HD5 from Janich&Klass (Germany)

>The pictures you linked to in the other post I get access denied. Probably not important for me

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Bad harddisc controller HD5 from Janich&Klass (Germany)

>The pictures you linked to in the other post I get access denied. Probably not important for me

9/19/25

Mayne Mihacsi, David Gesswein14

9/16/25

Image File Fails to show any files

Using Linux fdisk against the image it says partition 4 Start-C/H/S: 0/1/1 End-C/H/S: 384/9/17

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Image File Fails to show any files

Using Linux fdisk against the image it says partition 4 Start-C/H/S: 0/1/1 End-C/H/S: 384/9/17

9/16/25

Forgotten Machines, … d...@pdp8online.com5

9/9/25

Setup Autostart Drive Emulation on MFM Emulator

But then where do I specify the drive number and .emu image file for it to run after this? From page

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Setup Autostart Drive Emulation on MFM Emulator

But then where do I specify the drive number and .emu image file for it to run after this? From page

9/9/25

Alexey Pavlenko, d...@pdp8online.com9

8/17/25

Maxtor XT 2190 - From a Wang DS (Data Storage Cabinet)

I've uploaded a zip with the 2 files via the link. Thank you again for the help! On Saturday,

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Maxtor XT 2190 - From a Wang DS (Data Storage Cabinet)

I've uploaded a zip with the 2 files via the link. Thank you again for the help! On Saturday,

8/17/25

Jay Cotton, … Rob Pritchard10

8/12/25

Attempting to run 2 drives with mfm emulator

Appreciate this is an old thread, but I have MFM Emu working find with an RQDX3 in an 11/73 I'm

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Attempting to run 2 drives with mfm emulator

Appreciate this is an old thread, but I have MFM Emu working find with an RQDX3 in an 11/73 I'm

8/12/25

Steve Jones, Joan Touzet5

6/21/25

What are people running on the Beaglebone Green Wireless (BBGW)?

Looks like the DECromancer image `BBB_deb11.9_mfm_v4.31_2024-10-23.img` is working on a BBGW (v1.0)

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What are people running on the Beaglebone Green Wireless (BBGW)?

Looks like the DECromancer image `BBB_deb11.9_mfm_v4.31_2024-10-23.img` is working on a BBGW (v1.0)

6/21/25

Ashlin Inwood, d...@pdp8online.com5

6/3/25

MFM drive from NorthStar Horizon

Google implemented a poor spam filter a while ago that I have no control over. It also only notifies

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MFM drive from NorthStar Horizon

Google implemented a poor spam filter a while ago that I have no control over. It also only notifies

6/3/25

Tom Stepleton, David Gesswein7

5/7/25

Not sure how to convert PERQ_T2 .emu files to images

Thanks David, there's no need to look into it on my account; I'm happy to start fresh with

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Not sure how to convert PERQ_T2 .emu files to images

Thanks David, there's no need to look into it on my account; I'm happy to start fresh with

5/7/25

emu, David Gesswein2

4/20/25

You can use mfm_write. This way tou can read back to verify disk wiped. Use ext2emu to create the

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You can use mfm_write. This way tou can read back to verify disk wiped. Use ext2emu to create the

4/20/25

emu, … Kirk Barrett4

4/14/25

Reversed cables?

Absolutely fantastic boards!! On Sunday, April 13, 2025 at 12:22:33 PM UTC-4 e2k wrote: On 2025-04-13

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Reversed cables?

Absolutely fantastic boards!! On Sunday, April 13, 2025 at 12:22:33 PM UTC-4 e2k wrote: On 2025-04-13

4/14/25

Marcel Prisi, … Timo Hartong9

3/4/25

mfm_emu & Acorn A310

It has been tested it was almost no trouble. It is working as you have outlined ;-). On Tuesday,

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mfm_emu & Acorn A310

It has been tested it was almost no trouble. It is working as you have outlined ;-). On Tuesday,

3/4/25

3/4/25

ST506 Emulator working in Acorn A410/I

I also tested the ST506 emulator with an Acorn A410/I which has an onboard ST506 controller and it

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ST506 Emulator working in Acorn A410/I

I also tested the ST506 emulator with an Acorn A410/I which has an onboard ST506 controller and it

3/4/25

Timo Hartong, David Gesswein4

3/4/25

Images for Acorn Archimedes

Dear David, I saw the list and I saw I forgot to mention versions etc. They are : Revision board : D

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Images for Acorn Archimedes

Dear David, I saw the list and I saw I forgot to mention versions etc. They are : Revision board : D

3/4/25

Chris Tersteeg, David Gesswein2

2/3/25

LED PCB for the J7 Expansion Connector

Thanks. I've added links to this message to my site. On Sun, Feb 02, 2025 at 04:07:36PM -0800,

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LED PCB for the J7 Expansion Connector

Thanks. I've added links to this message to my site. On Sun, Feb 02, 2025 at 04:07:36PM -0800,

2/3/25

Chris Tersteeg, David Gesswein2

2/2/25

Command fault when analyzing a CMI 6426-S

On Sun, Feb 02, 2025 at 03:11:59PM -0800, Chris Tersteeg wrote: > No sectors readable from

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Command fault when analyzing a CMI 6426-S

On Sun, Feb 02, 2025 at 03:11:59PM -0800, Chris Tersteeg wrote: > No sectors readable from

2/2/25

Jay Cotton, … cub...@gmail.com10

1/14/25

simh and emulator file compatibility.

What do you mean by "I can't seem to link anything"?? 10MB would be way bigger than I

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simh and emulator file compatibility.

What do you mean by "I can't seem to link anything"?? 10MB would be way bigger than I

1/14/25

Alexander Huemer, … d...@pdp8online.com9

12/31/24

Requesting help in interpreting mfm_read output

The one message got stuck in a spam queue. Looks like you figured it out. On the image Phil was right

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Requesting help in interpreting mfm_read output

The one message got stuck in a spam queue. Looks like you figured it out. On the image Phil was right

12/31/24

Andrew Hudson, … cub...@gmail.com18

11/5/24

Resurrecting an ST-225 from a DEC Pro

I would be interested in an Ultrix image as well. I have v7m 1.0 floppies (which I also contributed

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Resurrecting an ST-225 from a DEC Pro

I would be interested in an Ultrix image as well. I have v7m 1.0 floppies (which I also contributed

11/5/24

Riccardo Cannavo

11/5/24

Reading an old MFM Drive

Hi all, I was wondering if anyone can give me a big favor, I would need to read an old drive as

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Reading an old MFM Drive

Hi all, I was wondering if anyone can give me a big favor, I would need to read an old drive as

11/5/24

ich.c...@gmail.com, David Gesswein4

11/2/24

Search for last 3.x OS 7.x image

> You can update to the current 4.xx code on the old OS if desired. Thanks David, yes - that's

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Search for last 3.x OS 7.x image

> You can update to the current 4.xx code on the old OS if desired. Thanks David, yes - that's

11/2/24

Tom Stepleton, … David Gesswein6

10/22/24

Anyone using an MFM emulator with a PERQ 2T2?

On Tue, Oct 22, 2024 at 12:17:41PM -0700, Joan Touzet wrote: > Hi Tom, > > Sadly, I don'

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Anyone using an MFM emulator with a PERQ 2T2?

On Tue, Oct 22, 2024 at 12:17:41PM -0700, Joan Touzet wrote: > Hi Tom, > > Sadly, I don'

10/22/24

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