Miracle Systems FLP size determining algorithm known?

Nagging hardware related question? Post here!
stephen_usher
Trump Card
Posts: 181
Joined: Tue Mar 11, 2014 8:00 pm

Re: Miracle Systems FLP size determining algorithm known?

Postby stephen_usher » Sun Oct 20, 2019 12:59 pm

Well, something is definitely wrong with the detection somehow. I installed the logging feature of FF and got this when I tried to format on the Sandy Q-Board:

Code: Select all

Write 8[09]/9... 6039 us
IMG Bad Sector Offset: 4294961184 -> 9
Write 0[01]/9... 3512 us
Write 1[02]/9... 5982 us
Write 2[03]/9... 7468 us
Write 3[04]/9... 7479 us
Write 4[05]/9... 7630 us
Write 5[06]/9... 7363 us
Write 6[07]/9... 6424 us
Write 7[08]/9... 7478 us
Write 8[09]/9... 8282 us


Well, I won't get any further until the developer returns from his week away next week. (Half-term, maybe?)


stephen_usher
Trump Card
Posts: 181
Joined: Tue Mar 11, 2014 8:00 pm

Re: Miracle Systems FLP size determining algorithm known?

Postby stephen_usher » Mon Oct 21, 2019 6:37 pm

Further testing of ED disk images shows that they're very unreliable. It seems that the Gotek can't keep up with the data rate, at least during formatting. (QL ED disks have a higher data density/rate than the PC ED format, possibly pushing the technology to edge.)

I've been asked by the Flashfloppy maintainer to test file access using a pre-prepared image. Unfortunately I don't have an ED drive or disk. Does anyone know of a QL emulator which supports ED floppy images so that I can generate an image?

P.S. Having looked, there seems to be no emulators which support the ED images, so I'm going to have to abandon the attempt at getting the Gotek+Flashfloppy supporting them.


User avatar
NormanDunbar
Aurora
Posts: 781
Joined: Tue Dec 14, 2010 9:04 am
Location: Leeds, West Yorkshire, UK
Contact:

Re: Miracle Systems FLP size determining algorithm known?

Postby NormanDunbar » Tue Oct 22, 2019 2:08 am

You can create a blank ED image with qltools - https://github.com/NormanDunbar/qltools/releases

HTH

Cheers,
Norm.


Why do they put lightning conductors on churches?
If at first you don't succeed, don't take up skydiving!
If you think your job is pointless, remember, there's someone in Germany who fits indicators to BMWs.
stephen_usher
Trump Card
Posts: 181
Joined: Tue Mar 11, 2014 8:00 pm

Re: Miracle Systems FLP size determining algorithm known?

Postby stephen_usher » Tue Oct 22, 2019 8:23 am

NormanDunbar wrote:You can create a blank ED image with qltools - https://github.com/NormanDunbar/qltools/releases

HTH

Cheers,
Norm.


Excellent! I'll take a look.


Derek_Stewart
QL Wafer Drive
Posts: 1493
Joined: Mon Dec 20, 2010 11:40 am
Location: Runcorn, Cheshire, UK

Re: Miracle Systems FLP size determining algorithm known?

Postby Derek_Stewart » Tue Oct 22, 2019 9:36 am

stephen_usher wrote:Further testing of ED disk images shows that they're very unreliable. It seems that the Gotek can't keep up with the data rate, at least during formatting. (QL ED disks have a higher data density/rate than the PC ED format, possibly pushing the technology to edge.)

I've been asked by the Flashfloppy maintainer to test file access using a pre-prepared image. Unfortunately I don't have an ED drive or disk. Does anyone know of a QL emulator which supports ED floppy images so that I can generate an image?

P.S. Having looked, there seems to be no emulators which support the ED images, so I'm going to have to abandon the attempt at getting the Gotek+Flashfloppy supporting them.

Hi,

Does the Gotek support ED Disk formats, my Gotek drives only go up to HD format.

Can you tell me the model of the you Gotek drive that can read/write to ED Disk formats.


Regards,

Derek
stephen_usher
Trump Card
Posts: 181
Joined: Tue Mar 11, 2014 8:00 pm

Re: Miracle Systems FLP size determining algorithm known?

Postby stephen_usher » Tue Oct 22, 2019 6:24 pm

It can potentially. The Flashfloppy firmware merely needs a disk description in the IMG.CFG file. Apparently it can handle the PC ED format, but that has a smaller sector size, giving more time to process the data due the gaps.


stephen_usher
Trump Card
Posts: 181
Joined: Tue Mar 11, 2014 8:00 pm

Re: Miracle Systems FLP size determining algorithm known?

Postby stephen_usher » Tue Oct 22, 2019 7:10 pm

Right, I formatted an ED image using qltools and copied it onto the USB drive, created an IMG.CFG file with containing the QL disk geometries and loaded it into the Gotek.

I can write and read files from the images without issue, so it looks like the formatting process just tips over the edge of what Flashfloppy is capable of in terms of data rate.


User avatar
NormanDunbar
Aurora
Posts: 781
Joined: Tue Dec 14, 2010 9:04 am
Location: Leeds, West Yorkshire, UK
Contact:

Re: Miracle Systems FLP size determining algorithm known?

Postby NormanDunbar » Thu Oct 31, 2019 11:34 am

NormanDunbar wrote:You can create a blank ED image with qltools - https://github.com/NormanDunbar/qltools/releases


Ok, I updated the SinclairQL repository for QLTools this morning and merged in all my latest changes. This repository is now at 2.15.5 levels. I've created a new release under the following URL:

https://github.com/SinclairQL/qltools/releases/latest

It's probably best to clone and release from this repo, rather than from mine.


Cheers,
Norm.


Why do they put lightning conductors on churches?
If at first you don't succeed, don't take up skydiving!
If you think your job is pointless, remember, there's someone in Germany who fits indicators to BMWs.

Who is online

Users browsing this forum: No registered users and 4 guests