2.8" QD Disk Emulation

[Jeff]

yep perfect

Very Interesting ! We are close ! I have just added some blank bytes (0x00) before the track beginning on your DSKA0004.QD.

So can you try write to this images ?

EDIT : DSKA0004.zip removed.

[Jeff]

Ignore the previous test/post and try this instead :

Update the firmware with 3.4.1.13 (attached)

And try to write to this image !

HxCUSBFE.UPD

(61.5 KiB) Downloaded 303 times

DSKA0004.zip

(418 Bytes) Downloaded 309 times

[AMSynths]

Load fails with Illegal QD and write fails with verify error.
I can no longer do a F! Load to read the bank name.

[Jeff]

Load fails with Illegal QD and write fails with verify error.
I can no longer do a F! Load to read the bank name.

Load fail is normal : The image is blank.

Please share the image after the write fail !

[AMSynths]

See attached. I tried reading after writing, last time it found the bank name.
Another write after a save does recognise that its a QD that has been written to.

[Jeff]

Retry to write on the last DSKA0000.QD image (the one from this post : viewtopic.php?f=2&t=773&start=225#p21206 )
with this firmware :

HxCUSBFE.UPD

(61 KiB) Downloaded 294 times

And share the image.

Also can you try to read these images and tell me what you get :

to_read2.zip

(1.43 KiB) Downloaded 299 times

[AMSynths]

Latest fw loaded
to_read2 gives Illegal QD
Last DSKA0000.QD gives I/O error 2 - from Sun Sep 01, 2019 2:25 pm

I can still write to 0004 with a verify error, and then successfully read the file back in

[Jeff]

I can still write to 0004 with a verify error, and then successfully read the file back in

Interesting. Which DSKA0004 from this thread exactly ?
Is the full read working ? (i mean with the sample ?)
This is maybe related to this ? :

0004 loads reliably time after time, and ok without pull up resistor.

I have noticed one change needed:
The full QD read after a F1 Load needs to be delayed until after the check read has gone to the end of the QD and stopped. At the moment I can hit Load during the check read and it stops with Illegal QD, because the Gotek has allowed a read during a read

Sequence should be:
F1 Load
Sampler reads the QD bank name AND continues to the end of the bank/disk - takes another 3 seconds or so
Any pressing of Load during this time is delayed to start reading until this first QD read has stopped
Once the check read has fully completed to the end of the Bank, a full Load can take place, and the sampler reads the QD bank into memory

Hope that helps!

I am not sure what do you mean by "because the Gotek has allowed a read during a read" but i suspect that the ready window is a bit too long then the ready signal still asserted too much time after the write and the verify start immediately. This is similar to what you describe.


attached a new firmware with a end of write splice support.

EDIT : HxCUSBFE.UPD removed.

[AMSynths]

Hi.
There are 3 types of Load QD:

1. Normal Load - reads the bank on the QD
2. F1 Load - reads the name of the bank and the structure only but keeps reading to the end of the bank, as the QD cant stop mid track. The sample data is not loaded.
3. F2 Load - reads the bank on the QD but does not load performance parameters, same use case as 1 in terms of disk handling

Because an F1 Load frees up the display and sampler controls early (within 1 second), it is possible to hit Load again.
Its important that this second command is actioned after the disk has reached the end of the read.
So the Gotek needs to complete a read before starting another one

Hope that helps

[AMSynths]

Latest fw loaded

0000 I/O Error 2
0001 Illegal QD
0002 Illegal QD
0003 Illegal QD
0004 Loads ok

[Jeff]

Can you try to write to each of these images ?. (They are currently all blanks with an increasing ready window size from 4.67s to 4.77s)
please post them back here.

EDIT : to_write_and_read.zip removed.

[AMSynths]

All fail verify

EDIT : archive removed!

[Jeff]

All fail verify

Some are fully readable when you try to read them ?

[AMSynths]

Only 0005 is readable, the rest fail with Illegal QD

[Jeff]

New firmware. Changes :

- Timing : Fix the track position after a write.
- Data line is masked outside the ready zone.

EDIT : HxCFEUSB.UPD removed.

EDIT : to_write_and_read2.zip removed.

The images are blank, try to write to each images and post them back.

And thanks for all the tests and your patience... This take longer than i expected...
(I think there is a last thing to fix if this fw still doesn't work properly with the Roland)