Twospruces
Veteran Member
Hi all
Trying to add an MFM controller to my Z171 so I can test a couple of MFM drives.
Only partially working.
To connect up the controller, I made an adapter board they extends the Z171 bus. Seems ok.
WDXT bios rom is readable and I can run the internal commands via DEBUG. So thats good.
The format program built in complains with error 20... bad controller. Oops!
CHECKIT reports the bios is present but it also reports that IRQ5 is unassigned. That seems bad since this controller needs IRQ5.
Z171 manuals state that irq5 is available on the bus and is used for external HDD.
Any suggestions as to where to look for issues?
Thanks!
Trying to add an MFM controller to my Z171 so I can test a couple of MFM drives.
Only partially working.
To connect up the controller, I made an adapter board they extends the Z171 bus. Seems ok.
WDXT bios rom is readable and I can run the internal commands via DEBUG. So thats good.
The format program built in complains with error 20... bad controller. Oops!
CHECKIT reports the bios is present but it also reports that IRQ5 is unassigned. That seems bad since this controller needs IRQ5.
Z171 manuals state that irq5 is available on the bus and is used for external HDD.
Any suggestions as to where to look for issues?
Thanks!