Module Configuration And Status Registers; Cpu Configuration Register; Table 1-16. Module Configuration And Status Registers - Motorola MTX Series Programmer's Reference Manual

The NVRAM and RTC is accessed through the above three registers.
When accessing a NVRAM/RTC location, follow the following
procedure:
1. Write the low address (A7-A0) of the NVRAM to the
2. Write the high address (A15-A8) of the NVRAM to the
3. Then read or write the NVRAM/RTC Data Port.
Refer to the MK48T59 Data Sheet, listed in
Documentation, for additional details and programming information.

Module Configuration and Status Registers

Three registers provide the configuration and status information about the
board. These registers are listed in the following table:

Table 1-16. Module Configuration and Status Registers

PCI I/O Address
0000 0800
0000 0802
0000 0803
0000 08C0 - 0000 08C1
The following sub-sections describe these registers in detail.

CPU Configuration Register

The CPU Configuration Register is an 8-bit register located at ISA I/O
address x0800. This register is defined for the MTX to provide
compatibility with existing firmware and AIX revisions. The Base Module
Status Register should be used to identify the base module type and the
System Configuration Register should be used to obtain information about
the overall system for future releases.
http://www.motorola.com/computer/literature
NVRAM/RTC STB0 register,
NVRAM/RTC STB1 register, and
Function
CPU Configuration Register
Base Module Feature Register
Base Module Status Register
Seven-Segment Display Register
ISA Local Resource Bus
Appendix A, Related
1
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