Re: MFM drive gone nuts

Date: Mon, 21 Jul 2014 00:50:15 +0200
Message-ID: <>

W dniu 2014-07-20 15:38, Julian Perry napisaƂ(a):

> As dodgy as it sounds, you might try switching 5/6/7/8 ALL CLOSED 
> (making
> drive selects 0,1,2,3 ALL responsive). Unlike Head select (which is a
> binary word) - Drive select are actual individual select lines.

I went home and tried that, but after I turned the computer on, 
something very wrong happened to the drive - it does not spin. The LED 
flashes an error message, which according to the technical manual 
indicates "Index pulse not detected during spinup" which as I understand 
indicates that the drive CPU detected that it cannot spin.

I think the drive just died :-(

Oddly, the computer failed too and now indicates "RAM Error" on startup. 
I wonder whether these two issues are related, but I have no idea how.

Now I need to find TMS4256 chips to replace the RAM in the computer, 
hopefully it will fix the issue. As for the drive, I am afraid it's 


       Message was sent through the cbm-hackers mailing list
Received on 2014-07-20 23:00:02

Archive generated by hypermail 2.2.0.