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Nibling using ZoomFloppy (XUM1541 / XU1541) on 1571 drive fails

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When I try to nibble using ZoomFloppy XUM1541/XU1541 my 1571 drive fails.

 

C:\Dump>nibread test.nib

nibread - Commodore 1541/1571 disk image nibbler
(C) Peter Rittwage and the rest of the C64 Preservation Project team
http://c64preservation.com
Revision 2014 - Built Apr 18 2017 09:40:05

Drive Version: 73,CBM DOS V3.0 1571,00,00
Drive type: 1571
Bumping...
Initializing
Sending 1571 SRQ support code...
Uploading floppy-side code ($0459 bytes, $300-$759)...done.
Starting custom drive code...USB error in xum1541_wait_status: libusb0-dll:err [_usb_reap_async] reaping request failed, win error: A device attached to the system is not functioning.

USB error in xum1541_ioctl cmd: libusb0-dll:err [_usb_reap_async] reaping request failed, win error: A device attached to the system is not functioning.
asked Mar 29, 2018 in Misc by Tomse C64 (174 points)

1 Answer

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Best answer
This can be a bug or an error in the 6526 chip (U20) which is socketed.

You can try with a new 6526 chip or MOS 8520(A) from the Amiga.
answered Mar 29, 2018 by Tomse C64 (174 points)
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