Module Configuration And Status Registers; Table 1-17. Mk48T59/559 Access Registers - Motorola MVME2600 Series Reference Manual

Strobe 1 Register, and the NVRAM/RTC Data Port Register. The
NVRAM/RTC Address Strobe 0 Register latches the lower 8 bits of the
address and the NVRAM/RTC Address Strobe 1 Register latches the upper
5 bits of the address.

Table 1-17. MK48T59/559 Access Registers

PCI I/O Address
0000 0074
0000 0075
0000 0077
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
NVRAM/RTC STB0 register,
2. Write the high address (A15-A8) of the NVRAM to the
NVRAM/RTC STB1 register, and
3. Then read or write the NVRAM/RTC Data Port.
Refer to the MK48T59 Data Sheet for additional details and programming
information.

Module Configuration and Status Registers

Four registers provide the configuration and status information about the
board. These registers are listed in the following table:
Function
NVRAM/RTC Address Strobe 0 (A7 - A0)
NVRAM/RTC Address Strobe 1 (A15 - A8)
NVRAM/RTC Data Register
ISA Local Resource Bus
1-35
1