Specifications

80 AMD Geode™ GeodeROM Functional Specification
PCI Support
32087C
7.1.5.2 Subfunction 09h - Read Config WORD
Description:
Reads one WORD from the configuration space of the caller-specified PCI device.
Passed:
Returns:
7.1.5.3 Subfunction 0Ah - Read Config DWORD
Description:
Reads one DWORD from the configuration space of the caller-specified PCI device.
Passed:
Returns:
Parameter Description
AH B1h (PCI Function ID)
AL 09h (Read Config WORD)
BH Bus number on which the device resides
BL Bits [7:3] = Device number
Bits [2:0] = Device function number
DI Register index (0-FFh) within the device’s or function’s configuration space
Parameter Description
CX WORD read from configuration space
CF Function completion status:
0 if function completed successfully
1 if an error occurred, AH contains error code
AH Function return status codes: See AH in Section 7.1.2 "Subfunction 02h - Find PCI Device" on page
76.
Parameter Description
AH B1h (PCI Function ID)
AL 0Ah (Read Config DWORD)
BH Bus number on which the device resides
BL Bits [7:3] = Device number
Bits [2:0] = Device function number
DI Register index (0-FFh) within the device’s or function’s configuration space
Parameter Description
CX DWORD read from configuration space
CF Function completion status:
0 if function completed successfully
1 if an error occurred, AH contains error code
AH Function return status codes: See AH in Section 7.1.2 "Subfunction 02h - Find PCI Device" on page
76.