Mitsubishi Electric LS Pro Hardware Technical Reference page 38

Contents
3 SYSTEM BOARD
3.1 Introduction ............................3/2
General ...................................... 3/2
Description .............................. 3/4
3.2 Processor system ................3/5
Address and data bus
structure ................................... 3/5
Software compatibility ........ 3/5
Modes of operation .............. 3/5
3.3 SCAMP ...................................3/6
Interrupt structure ............... 3/6
Direct Memory Access ....... 3/8
System timers ......................... 3/9
3.4 System memory .................3/10
General ................................... 3/10
Read only memory (ROM) .. 3/10
Random access memory
(RAM) ..................................... 3/10
Real time clock (RTC)RAM . 3/11
Contents of RTC RAM .... 3/11
3.5 Video adapter .....................3/14
General ................................... 3/14
System Identification Number
(SIN) ....................................... 3/2
Major components ............ 3/2
Coprocessor ....................... 3/4
System reset ........................ 3/4
80386SX processor features. 3/5
486SLC processor features.3/5
Memory controller ........... 3/6
System control port B ..... 3/6
List of hardware interrupts 3/7
Non-Maskable Interrupts 3/8
Address generation .......... 3/8
Operation ............................. 3/9
Video controllers ........... 3/15
LS PRO HARDWARE TECHNICAL REFERENCE 3/1
System Board
3.6 Floppy disk controller .......3/15
General ................................... 3/15
Drive formats ...................... 3/15
3.7 Hard disk interface ............3/16
General ................................... 3/16
Interface signal descriptions 3/16
3.8 Peripherals controller .......3/17
Serial ports ............................ 3/17
Programmable baud-rate
generator ........................... 3/17
Parallel port .......................... 3/18
3.9 Keyboard/mouse
controller ............................3/18
General ................................... 3/18
Keyboard password security . 3/18
3.10 LOC Technology ................3/19
3.11 Ethernet port .......................3/19
General ................................... 3/19
82596 LAN coprocessor .. 3/20
82C503 dual serial
transceiver ........................ 3/20
7997 ..................................... 3/20
3.12 Apricot Business Audio ....3/21
3.13 System board connectors..3/21
Hard disk drive connectors . 3/21
Control Connector ....... 3/21
Power connector ........... 3/22
Floppy drive connector ... 3/22
System board power
connector .............................. 3/22
Battery jumper .................... 3/22