FDC (NEC mirco765) programming

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1 total messages Started by bwl2324 Fri, 08 Jan 1993 11:49

#7526

Author: bwl2324
Date: Fri, 08 Jan 1993 11:49

12 lines
1032 bytes

Hello,

I try to program the FDC for sending disk sectors via DMA/channel 2
into memory. This works fine if I read the disk before starting my routine
but if I try to read a disk sector right after booting the FDC status shows
that FDC can't find the Address mark (bit 3 in status byte 0 is set).
I take this step to get the FAT-sector to examine the diskette's format.
I tried to recalibrate the disk drive but it doesn't help.
Any considerations ?

	Thanks for helping,
			Steve

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