ACT apricot - Page 13

CONTENTS
3-3 MICROSCREEN DRIVER
INTRODUCTION ..... ...... .... ...... ...... ..... ........ ............. 1
APPLICATIONS INTEREST ..................................... 1
SYSTEMS INTEREST .......... ....... .......... ............... ...... 4
3-4 KEYBOARD DRIVER
INTRODUCTION ...... ............ ............... ..... ........ ....... 1
APPLICATIONS INTEREST .... ....... .... ........ ....... ....... 1
Keyboard Look-up table ......................................... 1
SYSTEMS INTEREST . .......... ............... ......... ...... ....... 4
Keyboard to Apricot Handler .............. ................... 4
Key
Make Code handler .......................... ............... 5
Key Break Code
handler ......................................... 7
Translation of data routines ................................... 8
Auto Repeat handler .............................................. 8
Non make/break code interpreter ......................... 8
Queue handlers for data to MS-DOS ..................... 9
MS-DOS queue ....................................................... 9
Local queue ............................................................. 9
Keyboard
queue ................................................... 10
3-5 CONTROL DEVICE DRIVER
INTRODUCTION ..... .............. ......... ......................... 1
APPLICATIONS INTEREST ..... ....... .... ..................... 1
Calling the control device ...................................... 1
Specification of the Apricot Control Device ......... 3
Screen Driver .......................................................... 3
Keyboard
Driver ..................................................... 3
MicroScreen Driver ................................................ 5
Serial Port Driver .................................................... 6
Parallel I/O Driver ............................................... 12
Sound Generator ................................................. 14
Floppy
Disk Drivers ............................................ 15
Cache/Graphics/IBM configuration ................... 16
SYSTEMS INTEREST ............................................. 17