ACT apricot - Table of Contents

List of Contents
Page
INTRODUCTION .................. ...... ........... .... ............. ...... 2
DESCRIPTION ........................... '" ... ........... ................... 4
General ............................................................................ 4
Disk Write ....................................................................... 5
DiskRead ........................................................................ 5
Disk Formatting .............................................................. 6
Read/write Head Positioning ......................................... 8
FDC DETAIL .................................................................. 9
General ............................................................................ 9
Processor Interface ....................................................... 10
Disk Drive Control...................................................... 13
Command Register ............................................. :........ 14
Status Register ............................................................. 15
Track Register .............................................................. 15
Sector Register ............................................................. 15
Data Register ................................................................ 16
PROGRAMMING CONSIDERATIONS ................... 16
Disk Drive Selection .................................................... 16
Head Loading ............................................................... 16
Head Positioning .......................................................... 17
Data Transfers .............................................................. 21
Formatting Commands ............................................... 26
Force Interrupt Command .......................................... 32
INTERFACE CONNECTION DETAIL ..................... 33
System Connections .................................................... 33
Disk Drive Connections ......................... :.................... 35
TRACKFORMAT ....................................................... 37
List of Illustrations Figure
Floppy
Disk Interface block diagram ............................. 1
Track format ................................................................... 2