Specifications

AMD Geode™ GeodeROM Functional Specification 131
System Services
32087C
12.1.10.1 Subfunction 00h - Read ACCESS.bus Byte
Description:
Read a byte of data from an ACCESS.bus device.
Passed:
Returns:
Related Functions:
None.
12.1.10.2 Subfunction 01h - Write ACCESS.bus Byte
Description:
Write a byte of data to an ACCESS.bus device.
Passed:
Returns:
Related Functions:
None.
Parameter Description
AX BE00h
BX 4E53h (= ‘NS’)
CL Register offset
CH ACCESS.bus address
Parameter Description
CF 0 = Success
1 = Failure
AL Data read
Parameter Description
AX BE00h
BX 4E53h (= ‘NS’)
CL Register offset
CH ACCESS.bus address
DL Data read
Parameter Description
CF 0 = Success
1 = Failure