ACT apricot - Page 7

CONTENTS
SECTION
2.HARWARE DETAIL
2-1 SYSTEM UNIT
CONTENTS ............................................................... 1
INTRODUCTION .... .......... ............ ..... ............... ....... 1
SYSTEM BOARD ....... ......... ............. ..... ...................... 2
DISK DRIVES ............................................................. 3
POWER SUPPLY DETAILS ....................................... 3
General ................................................................... 3
DC Supply Distribution ......................................... 4
Fuse Rating ............................................................. 4
PHYSICAL DIMENSIONS .... ............... ..................... 5
2-2 SYSTEM BOARD
CONTENTS ............................................................... 1
INTRODUCTION ......... : ........................................... 1
DESCRIPTION ..... ... ............ ...... ..... ..... ....... ............. ... 1
Processors .......................................................
, ., ., ., . 1
Communications Handling ................................... 2
Sound Generation .................................................. 3
System Memory ..................................................... 3
CRT Controller ...................................................... 4
Floppy
Disk Controller .......................................... 4
Expansion
Slots ...................................................... 4
Interrupt Controller ............................................... 4
Timer ...................................................................... 4
Input/Output Space ................................................ 5
2-3 INTERRUPT CONTROLLER
CONTENTS ............................................................... 1
INTRODUCTION . ................ ....... ........ .................. ... 1
DESCRIPTION ..... ........ ..... .... ........... .......................... 3
General ................................................................... 3
Interrupt Sequence ................................................. 4
Interrupt Masking .................................................. 5
PROGRAMMING CONSIDERATIONS .................. 5
General ............................................... "'................... 5
Initialization Command Words ............................. 6
Operational Command Words ............................... 8