Quick question for anyone with a PC disk drive on their Sam... What changes need to be made to the normal WD1772 interface to make the PC drive work? I'm using both a home made board and an old interface from a sam drive - and each time the drive is detected by the Sam - but when accessed it just spins (disk light stays off too).... and times out with a 'check disk in drive' error. (The WD1772's im using are working - i've tested it in one of my citizen drives)
On the board from an old Sam drive - both Motor Enable pins (10 and 16) on the floppy connector are tied together from the signal from the WD1772 (through an invertor), but in the schematic for the external disk interface pin 10 (Motor Enable A) is tied to zero volts. I've tried both - same problem each time - the disk drive just spins when accessed... Anyone able to lend any advice on getting a PC drive working ? Cheers Colin Piggot ==== Quazar : Hardware and Software for the Sam http://www.quazar.clara.net/sam/
