Motorola MVME172 User Manual

Page 62

1-44

Computer Group Literature Center Web Site

Board Description and Memory Maps

minor version numbers. For example, if the version of this structure
is 1.0, this field contains:

0100

2. Twelve bytes are reserved for the serial number of the board in

ASCII format. For example, this field could contain:

000000470476

3. Sixteen bytes are reserved for the board ID in ASCII format. For

example, for an MVME172 board with MC68060, SCSI, Ethernet,
4MB DRAM, and 512KB SRAM, this field contains:

MVME172-

xxx

(The 12 characters are followed by four blanks.)

4. Sixteen bytes are reserved for the printed wiring assembly (PWA)

number assigned to this board in ASCII format. This includes the

01-W

prefix. This is for the main logic board if more than one board

is required for a set. Additional boards in a set are defined by a
structure for that set. For example, for an MVME172 board with
MC68060, SCSI, Ethernet, 4MB DRAM, and 512KB SRAM, at
revision A, the PWA field contains:

01-W318

xB01A

(The 12 characters are followed by four blanks.)

5. Four bytes contain the speed of the board in MHz. The first two

bytes are the whole number of MHz and the second two bytes are
fractions of MHz. For example, for a 60.00 MHz board, this field
contains:

6000

6. Six bytes are reserved for the Ethernet address. The address is stored

in hexadecimal format. (Refer to the detailed description earlier in
this chapter.) If the board does not support Ethernet, this field is
filled with zeros.

7. These two bytes are reserved.

8. Two bytes are reserved for the local SCSI ID. The SCSI ID is stored

in ASCII format.