Since many years I'm using a Polar DDT Disk drive tester for function test of 3.5, 5 1/4 and 8 inch floppy disk drives.
The tester was made about 1989 by Polar Instruments Ltd (founder Doug Campbell).
The tester has become unreliable during startup, as it shows a checksum error, and occasionally it does not startup at all. Sometimes it works. Checking the internal ROMs showed, that bits of the firmware are not stable, others may have changed already.
I would like to program a new ROM, but need a working firmware file for it.
Attached a picture of the unit and the current dump of the firmware. The software version is V2.2 on a 32kB Eprom.
In first place, I've contacted Polar customer service, which have kindly responded, but no firmware or a device could be found anymore.
So, my hope is, that someone else owns this unit and could make a copy of the standard 32k internal Eprom.