Specifications

128 AMD Geodeā„¢ GeodeROM Functional Specification
System Services
32087C
12.1.8 Function 90h - Device Busy
Description:
Passed:
Returns:
Related Functions:
None.
Table 12-2. Global Descriptor Table (GDT)
Offset Size Description
00h 8 BYTEs Zeros (null descriptor)
08h 8 BYTEs GDT descriptor: See Table 12-3.
10h 8 BYTEs IDT descriptor
18h 8 BYTEs DS descriptor
20h 8 BYTEs ES descriptor
28h 8 BYTEs SS descriptor
30h 8 BYTEs CS descriptor
38h 8 BYTEs Uninitialized, used to build descriptor for BIOS CS Descriptor
Table 12-3. GDT Descriptor Table Format
Offset Size Description
00h WORD Segment limit, low WORD
02h 3 BYTEs Segment base address, low 24 bits
05h BYTE Access mode
06h BYTE Extended access mode
07h BYTE Segment base address, high 8 bits
Parameter Description
AH 90h
Parameter Description
CF 0 = Carry flag cleared