2.8" QD Disk Emulation

[AMSynths]

here it is...

[Jeff]

Does not work, verify error. Sorry...Real sample bank loaded from QD then saved to HxC

Don't be sorry ! Something is different in the file and this is interesting !

[Jeff]

Does not work, verify error. Sorry...Real sample bank loaded from QD then saved to HxC

Don't be sorry ! Something is different in the file and this is interesting !

So i confirm : i now see more blocks headers !

Can you retry the same on the 4.7s and 5.0s QD images ?

[Jeff]

(What's the name of the saved sample ? Is the name supposed to be recorded on the disk ?)

[AMSynths]

Sample Bank is called SoloSyn.4 and is written to disk along with the Bank Name - D in these examples.

[AMSynths]

4.7 second test

[AMSynths]

5.0 second test

[Jeff]

Have you tried to read back the 4.7s and 5.0s images ?

[AMSynths]

yep, Illegal QD

[Jeff]

So with some of my "quick and dirty" bruteforce tools i managed to find how is encoded the data !

I know now :

-> The sync word used
-> How to decode the datas
-> And which CRC is used to check the data integrity.

header.png (15.01 KiB) Viewed 3433 times

So the header is valid !

[AMSynths]

That is great progress - nice to see the data !

[Jeff]

That is great progress - nice to see the data !

That is great progress - nice to see the data !

Sure yes !

So now i can tell that the last test with the 5.0s files are valid regarding the different data blocks (3 blocks with valid CRC). We shouldn't be too far from something working. probably a ready signal timing issue.

viewtopic.php?f=2&t=773&start=135#p21103

[Jeff]

Can you try to read the attached file ?

DSKA0000.zip

(53.42 KiB) Downloaded 159 times

[AMSynths]

Tried a few times, but no...its doesnt read/load

[Trackdriver]

This is so great but seems a bit advanced. Will there be a kit or do I have to buy a drive and make the ribbon cable adapter myself?