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#1 10-06-2018 03:30:16

witchy
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(Αιωρήσου για λεπτομέρειες)
Registered: 23-09-2017
Μηνυματα: 6
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Successful Gotek boot!

Hi folks,

Things have moved on a lot since Kluder's experiments with the HxC floppy emulator in the form of Keir Fraser's 'flash floppy' firmware which loads on the current crop of cheap Gotek drive emulators and provides support for a lot of 8-bit machines as well as native ADF support for Amigas.

Inspired by Asshen's post (and chatting a lot with him on Facebook) I set about trying to get a 'brain and a Gotek to talk to one another. After a lot of experimentation, coffee and swearing I got a Newbrain to boot from a disk image, at which point I may have let out a small maniacal laugh.

Aside from a Gotek loaded with FlashFloppy firmware (current is 0.9.20) the key to getting this working was one Keir's other utilities - disk-analyse - which converts between multiple image types.  The sequence needed went along the lines of:

Use Dave Dunfield's ImageDisk to create .IMD files of some Newbrain disks.
Download, compile and install Disk-Utilities onto a handy Linux host, in my case my floppy imaging PC.
Use disk-analyse to convert the .IMD images into .HFE
Copy the .HFE files onto the USB stick used for the Gotek
Select image and boot your Newbrain!

One thing I haven't got working properly is disk swapping. When you change image on the Gotek you have to force the 'brain to re-read it by giving it a fake drive select command ('A0:' works), but aside from that it works nicely.

ImageDisk - http://www.classiccmp.org/dunfield/img/index.htm
Disk Utilities - http://github.com/keirf/disk-utilities
Boot disk image - http://www.binarydinosaurs.co.uk/nbhfe.zip

Hopefully this is useful for someone!

Witchy/Binary Dinosaurs

 

#2 15-02-2019 01:14:53

kluder
Seasoned

(Αιωρήσου για λεπτομέρειες)
Registered: 25-04-2009
Μηνυματα: 23
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Re: Successful Gotek boot!

Hi

Just bought a USB gotek floppy emulator to try it and keep it up against the HXC floppy emulator.
The big difference between the two emulators is the number of file formats.
The gotek drive was with flashfloppy firmware v0.14 which I updated to firmware v0.15
download here https://github.com/keirf/FlashFloppy/wiki/Downloads
then it could read several file formats, including '.dsk' which can be taken directly from the NB emulator.
The disk shift has always had to be followed by ctrl/c in NewBrain CP/M
as there is no disk change in the system. No connection between pin 34 on drive and disk controller.

No difference in reading / writing speed.
considerable ease of use as it can read '.dsk' format directly after updating.
start NB emulator, enter the folder with floppy disks and copy the '.dsk' file onto a USB stick puts USB stick in the gothek emulator and start CP/M up or go into basic.
The disadvantage of gotek is that there can only be one disk at a time.
where in the HXC drive there can be two floppy disks at a time

Greetings
Klaus

Last edited by kluder (19-02-2019 14:50:08)


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