FDC (NEC mirco765) programming

Article View: comp.os.msdos.programmer

Article #7526

Back to comp.os.msdos.programmer Previous Next

#7526

From: 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

Technical Details

Message-ID: <Q5K0TOU@minnie.zdv.uni-mainz.de>

Path:

arc1-ca.pugleaf.net!sparky!uunet!spool.mu.edu!yale.edu!ira.uka.de!math.fu-berlin.de!news.th-darmstadt.de!minnie!mzdmza.zdv.uni-mainz.de!BWL2324

Show Full Headers

Complete Article Headers

Newsgroups: comp.os.msdos.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!spool.mu.edu!yale.edu!ira.uka.de!math.fu-berlin.de!news.th-darmstadt.de!minnie!mzdmza.zdv.uni-mainz.de!BWL2324
From: bwl2324@mzdmza.zdv.uni-mainz.de
Subject: FDC (NEC mirco765) programming
Message-ID: <Q5K0TOU@minnie.zdv.uni-mainz.de>
Sender: usenet@minnie.zdv.uni-mainz.de (USENET News System)
Nntp-Posting-Host: vzdmzb.zdv.uni-mainz.de
Reply-To: bwl2324@mzdmza.zdv.uni-mainz.de
Organization: Johannes-Gutenberg Univ. Mainz
Date: Fri, 8 Jan 1993 11:49:46 GMT
Lines: 12