Mitsubishi Electric Apricot LS Pro, Hardware Technical Reference

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Chapter 4
Chapter 6
Memory and I/O Usage
Appendix A
Appendix C
Pr
eface
Chapter 4Chapter 5
LS PRO HARDWARE TECHNICAL REFERENCE 5/1
Contents
Hard disk drive controller
registers .................................... 5/14
Serial port controller
registers .................................... 5/14
Ethernet controller ................. 5/15
82596 PORT address .......... 5/15
82596 CA address ............... 5/15
Ethernet ID PROM .............. 5/15
Ethernet status register ...... 5/15
Business audio .......................... 5/17
Address .................................. 5/17
Data ports ............................. 5/17
Floppy disk controller ............ 5/17
Parallel port controller .......... 5/18
Data address port ............... 5/18
Status Port ............................ 5/18
Parallel control port ........... 5/19
Video DAC .............................. 5/19
VGA Registers ......................... 5/20
General registers ................ 5/21
Sequencer registers ............ 5/21
CRT Controller registers . 5/22
Graphics controller
registers ................................ 5/23
Attribute controller
registers ................................ 5/23
CL-GD542X Extension
registers .................................... 5/25
5 MEMORY AND I/O USAGE
5.1 Introduction ............................. 5/2
5.2 Memory usage ........................ 5/2
Shadowing disabled ................ 5/3
Shadowing enabled ................ 5/3
5.3 I/O space .................................. 5/4
DMA I/O address map ............ 5/5
Interrupt controllers ................. 5/6
System timers ............................ 5/6
Keyboard controller ................ 5/6
Command/status port .......... 5/6
Port B .......................................... 5/8
Write operations .................. 5/8
Read operations .................... 5/8
RTC RAM/NMI mask ............... 5/9
SCAMP registers ...................... 5/10
EMS index register and data
ports ....................................... 5/10
Configuration index and data
registers ................................. 5/10
Apricot ports ............................ 5/11
LAN LED ............................... 5/11
1.6 Mbyte floppy .................. 5/12
IOCHCK ................................ 5/12
Option ROM page ............... 5/12
Token-ring daughterboard 5/12
Microphone level control .. 5/13