Specifications

AMD Geode™ GeodeROM Functional Specification 151
System Services
32087C
12.1.10.25 Subfunction A8h - Set Warning
Description:
Set a summary screen warning with a string located at CX:DX. The system may contain up to three warning mes-
sages. If three already exist, this function places the warning in the third location.
Passed:
Returns:
Related Functions:
None.
12.1.10.26 Subfunction A9h - Read Companion Chip DWORD
Description:
Read a DWORD register from the PCI configuration space of any device in the companion chip.
Passed:
Returns:
Related Functions:
None.
Parameter Description
AX BEA8h
BX 4E53h (= ’NS’)
CX Segment of warning string
DX Offset of warning string
Parameter Description
CF 0 = Success
1 = Failure
Parameter Description
AX BEA9h
BX 4E53h (= ’NS’)
EDX PCI function address of register:
b[31] = 1
b[30:24] = reserved = 0
b[23:16] = bus number = 0
b[15:11] = device number = 12
b[10:8] = function number
b[7:2] = register number
b[1:0] = 00h
Parameter Description
EDX Register contents
CF 0 = Success
1 = Failure