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Re: GandALF, sub for 1541 custom IC MOS 325572-01

Posted: Tue Aug 08, 2017 12:57 am
by Gyro Gearloose
Man, I didn't know you had an Indus GT. Was it any good?
(Also, FYI, it's "discrete". )

Re: GandALF, sub for 1541 custom IC MOS 325572-01

Posted: Tue Aug 08, 2017 7:03 am
by eslapion
Gyro Gearloose wrote: Tue Aug 08, 2017 12:57 amMan, I didn't know you had an Indus GT. Was it any good?
It was nice looking and produced much less heat than an original 1541 with the PSU being external but it didn't have any striking features that would make it preferable to a drive like a 1571, since it was about the same price.

Re: GandALF, sub for 1541 custom IC MOS 325572-01

Posted: Sat Aug 19, 2017 9:20 pm
by eslapion
Ray Carlsen has tested a prototype. I am still waiting for the PCBs to make the 1st production run.
Francois,
I'm happy to report that your module works fine. I ran two
drives and copied whole disks and then individual files back and
forth, first with a copy program in a stock drive and then with
JiffyDOS installed which runs faster and is more critical of
misalignment and other problems. I found no difference between
GandALF and the stock controller chip. The programs I copied fill
virtually all of a disk and thus check drive operation at the
disk track limits. For most computer and drive diagnostics, test
software and firmware is fine but I prefer to "test it in combat"
in a real world setup. I's say your chip is ready for prime time.
Thanks! :-)


Ray

Re: GandALF, sub for 1541 custom IC MOS 325572-01

Posted: Tue Nov 28, 2017 4:33 am
by eslapion
GandALF is available and shipping. Half a dozen units have already sold.

Re: GandALF, sub for 1541 custom IC MOS 325572-01

Posted: Sun Oct 20, 2019 3:51 pm
by eslapion
Price dropped to 18 Euros or 20$US.

Re: GandALF, sub for 1541 custom IC MOS 325572-01

Posted: Wed Mar 09, 2022 9:24 pm
by T4077
I purchased this last week and it does seem to work correctly. Originally with the faulty drive array chip i was getting stepper motor juddering but spindle motor was working ok. With this chip i get no spindle motor control but the stepper motor working ok.
My pcb number is 250442 .
Is there any mods that need to done to make this chip compatable?

Re: GandALF, sub for 1541 custom IC MOS 325572-01

Posted: Thu Mar 10, 2022 11:48 pm
by eslapion
T4077 wrote: Wed Mar 09, 2022 9:24 pm I purchased this last week and it does seem to work correctly. Originally with the faulty drive array chip i was getting stepper motor juddering but spindle motor was working ok. With this chip i get no spindle motor control but the stepper motor working ok.
My pcb number is 250442 .
Is there any mods that need to done to make this chip compatable?
No mods required. It's supposed to be a drop-in replacement but short circuits on faulty boards can damage the XC9572XL CPLD.

This item is guaranteed for 3 years. Please provide a photo with the unit and a handwritten note so I know this is not just a photo snatched on Google as proof that you actually purchased it and send me a PM with your address and a replacement unit will be sent to you.

If you still have the same problem then the issue is with your board.