Mitsubishi Electric Apricot LS Pro, Hardware Technical Reference

Page: 102 / 142

Chapter 4
Chapter 6
Memory and I/O Usage
Appendix A
Appendix C
Pr
eface
Chapter 4Chapter 5
LS PRO HARDWARE TECHNICAL REFERENCE 5/11
Configuration The configuration index register is used to access the SCAMP configuration
index and data registers through the configuration data port. To access a particular register write
registers the index of the register to the configuration index register then access the register
via the configuration data port.
Index (hex) Register
0 Version
2 Slot pointer
3 DRAM map
5 DRAM control
6 Refresh control
7 Clock control
0A Reserved
0B EMS configuration 1
0C EMS configuration 2
0E A0000-BFFFFh segment access control
0F C0000-CFFFFh segment access control
10 D0000-DFFFFh segment access control
11 E0000-FFFFFh segment access control
13 Reserved
14 Miscellaneous control
15 ROM and DMA control
16 Bus control
Apricot ports
A block of 16 ports between 0120h and 012Fh are reserved for Apricot specific
functions.
Port Function
120 LAN LED
121 1.6 Mbyte floppy
122 reserved
0123, 0124 Option ROM page
0125-0127 reserved
128 Token ring daughterboard
0129-012B reserved
012C microphone level control
012D-012F reserved
LAN LED Only bit 0 of this port is used.
When it is set low (default) the LAN LED is not lit. When it is set high the LAN LED
is lit.