Mitsubishi Electric Apricot LS Pro, Hardware Technical Reference

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Memory and I/O Usage
Chapter 4
Chapter 6
Appendix A
Appendix C
Pr
eface
Chapter 4Chapter 5
5/16 LS PRO HARDWARE TECHNICAL REFERENCE
Bits 4, 5 These two bits indicate the presence or absence of a Token-Ring
daughterboard as shown in the following table
5 4 Significance
0 0 Token-ring fitted
0 1 reserved
1 0 reserved
1 1 No Token-Ring
Bit 6 This bit indicates the revision level of the system board. Revision C
boards return a 0, revision D boards return a 1.
Bit 7 This bit indicates the speed of the processor fitted to the system board.
Returns a 1 when a 33MHz processor is fitted. A 0 indicates a 25MHz
processor.
Write cycles
7 6 5 4 3 2 1 0
596reset
reserved
Bit 0 This bit is used to reset the 82596 Ethernet coprocessor. To reset the
82596 the following sequence must be followed:
write a 0 to bit 0 of 310h
write to port 08Eh
write a 1 to bit 0 of 310h
write to port 08Eh
write a 0 to bit 0 of 310h
write to port 08Eh
Bits 1-7 Reserved.