Specifications

AMD Geode™ GeodeROM Functional Specification 133
System Services
32087C
Returns:
Related Functions:
None.
12.1.10.5 Subfunction 04h - Write NVRAM Data
Description:
Write data associated with a particular token to NVRAM. The data passed to the function should be right justified and
up to eight bits wide. GeodeROM is responsible for determining the correct location to which information is written. The
caller is responsible for knowing the format of the data (see Table 12-4 on page 136).
Passed:
Returns:
Related Functions:
None.
Parameter Description
CF 0 = Success
1 = Failure
DL Value read, or error code:
Error Codes:
00h = Reserved
01h = Token not supported
02h = Software support not present (e.g., not implemented)
03h = Hardware support not present (e.g., no CMOS in system)
04h = Invalid media specified
05h = Token not valid in particular media
Parameter Description
AX BE04h
BX 4E53h (= ‘NS’)
CX Token
DL Value to write
DH Media:
See "Subfunction 03h - Read NVRAM Data" on page 132
Parameter Description
CF 0 = Success
1 = Failure
DL Error code if failure:
See "Subfunction 03h - Read NVRAM Data" on page 132