re microdisc floppy controller board

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jdavis6809
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re microdisc floppy controller board

Post by jdavis6809 » Mon Sep 10, 2018 2:45 pm

hello,

I have a microdisc controller board (no case) and trying to connect to a hxc floppy controller rev c

without hxc floppy controller rev c connected atmos displays "insert system disc"

with hxc floppy controller rev c connected atmos displays "no system disc found"

using system images from emulator (oricutron) oricdos 1.13.dsk and sedoric3.dsk (have been converted to .hfc format)

also is there any special power up cycle required and pressing reset (floppy controller board)

I do have 3.5" floppy drives but cannot test as I have no 3.5" floppy system disc

regards

john

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Chema
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Re: re microdisc floppy controller board

Post by Chema » Mon Sep 10, 2018 8:19 pm

Hi jdavis6809!

I dont use an HxC with my Oric, but other users do, so they will be more helpful. In any case, we know this setup should work.

A couple of things that could be of importance, are you using an original Microdisc board? Are you confident it works ok? Are you connecting it to the Oric using an Amplibus? You know about the problems with bus signals...

Another thing I find strange is the error message. I get a "No operating system on disk" when the disk is not bootable (or the disk cannot be read without errors).

The cycle I use is booting, get bars and Oric does not boot, press reset, getting the "insert system disk" insert disk (or select image) and it boots. With cumulus I select the image, then reset, it boots.

Oric Man
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Re: re microdisc floppy controller board

Post by Oric Man » Sun Dec 02, 2018 4:28 pm

Hi jdavis6809,
I have similar hardware for my Atmos and use both a floopy disk drive and the HXC SD floppy drive without any problem, although initially the HXC needed setting correctly on the jumpers and it was also sensitive to a correctly formatted SD card. Anyway if it helps I can suggest a few things to get you moving forward.
1. I can provide you with a 3.5" operating disc (Oric Dos or Sedoric) and this will help you to fully check out your real floppy drive and interface.
2. You could send me your SD card so that I can test it on my functioning system to confirm that all is okay.
3. Happy to provide some further support and photos of my floppy disk configuration if you are still unable to resolve your issues.

jdavis6809
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Re: re microdisc floppy controller board

Post by jdavis6809 » Sun Dec 09, 2018 2:02 pm

hello oric man,

my problem still persists

see attached zip copy of sd card

my email address is jdavis6809@aol.com

I am located in the UK

yes would like 3.5" disk copy with 720k image oric dos

I have tried various combinations

Floppy drive only
HFE only
Floppy drive and HFE

the floppy drive cable made with twist like bbc micro

regards

john davis uk

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Chema
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Re: re microdisc floppy controller board

Post by Chema » Mon Dec 10, 2018 12:33 am

Mmmmm... the Microdisc interface follows the Shuggart standard. A flat cable is needed (no twist or modification), just remember to use a floppy which can be set as DS0.

You obviously need a bootable disk. If you cannot make one (you need a win98 box with an internal -no USB- floppy drive). If you can't, you can use a Gotek with the fastfloppy or HxC firmware set as DS0.

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