Bbram,Tod Clock Memory Map; Table 3-13. Tod Clock Memory Map - Motorola MVME167-32 User Manual

Operating Instructions
3
Address
$FFFC1FF8
$FFFC1FF9
$FFFC1FFA
$FFFC1FFB
$FFFC1FFC
$FFFC1FFD
$FFFC1FFE
$FFFC1FFF
NOTES:

BBRAM,TOD Clock Memory Map

The MK48T08 BBRAM (also called Non-Volatile RAM or NVRAM) is divided into
six areas as shown in Table 3-11. MK48T08 BBRAM,TOD Clock Memory Map on page
3-25. The first five areas are defined by software, while the sixth area, the time-of-day
(TOD) clock, is defined by the chip hardware. The first area is reserved for user data.
The second area is used by Motorola networking software. The third area is used by
the SYSTEM V/68 operating system. The fourth area is used by the MVME167 board
debugger (MVME167Bug). The fifth area, detailed in Table 3-12. BBRAM
Configuration Area Memory Map on page 3-25, is the configuration area. The sixth
area, the TOD clock, detailed in Table 3-13. TOD Clock Memory Map on page 3-26,
is defined by the chip hardware.
The data structure of the configuration bytes starts at $FFFC1EF8 and is as follows.
struct brdi_cnfg {
3-26

Table 3-13. TOD Clock Memory Map

Data Bits
D7 D6 D5 D4
W R S
ST -- --
x -- --
x x --
x FT x
x x --
x x x
-- -- --
W = Write Bit R = Read Bit
ST = Stop Bit FT = Frequency Test
char version[4];
char serial[12];
char id[16];
char pwa[16];
char speed[4];
char ethernet_adr[6];
char fill[2];
char lscsiid[2];
char sysid[8];
char brd1_pwb[8];
char brd1_serial[8];
D3 D2 D1
-- -- -- --
-- -- -- --
-- -- -- --
-- -- -- --
x x -- --
-- -- -- --
-- -- -- --
-- -- -- --
S = Signbit
x = Unused
MVME167 Single Board Computer User's Manual
D0 Function
-- CONTROL 00
-- SECONDS 00
-- MINUTES 00
-- HOUR 00
-- DAY 01
-- DATE 01
-- MONTH 01
-- YEAR 00