Xref: utzoo comp.sys.amiga.programmer:1397 comp.sys.amiga.hardware:7015
Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!uunet!munnari.oz.au!gondwana19!krooglik
From: krooglik@ecr.mu.oz.au (Alex Krooglik)
Newsgroups: comp.sys.amiga.programmer,comp.sys.amiga.hardware,aus.computers.amiga
Subject: Device interaction
Keywords: trackdisk device
Message-ID: <7041@munnari.oz.au>
Date: 11 Mar 91 01:42:35 GMT
Sender: news@cs.mu.oz.au
Lines: 21


  I have been programming the drive directly now for a couple of weeks and
I am writing a boot block loading program. It works fine for small programs
(ie. under 1 track length). However, I now wish to put larger programs on
and I am having problems doing so. I will explain what I have been doing.

  I use DOS library Open() and Read() to get my file into memory after an
AllocMem(). I then open my device and set up my MsgPort structure. (This is
all being done in 68k). I initalize my first IOStdReq structure and use
DoIO() to send it. This first packet simply sends the first track (ie 22*512)
bytes of information to the disk. I then have a small subroutine that
increases the buffer pointer by (22*512) and the block offset (io_Offset) by
the same amount. I do this 13 times because my program is 13 tracks long
and when I run it, it doesn't crash but the drive sits there aimlessly
flashing its light. WHAT AM I DOING WRONG?


--------krooglik@ecr.mu.OZ----
+	Alex Krooglik	     |________________
+       Faculty of Chemical Engineering	     |__________
+_______University of Melbourne________________________|