ST486SMM View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'ST486SMM' PDF : 34 Pages View PDF
ST486DX - SMM IMPLEMENTATION
2.3.6 SVDC - Save Register and Descriptor
Instruction
SVDC
Opcode
0F 78 [mod sreg3 r/m]
Parameters
sreg3, mem80
Core Clocks
18
SVDC saves the contents of a segment register/selector and its associated descriptor to memory at
mem80. This instruction can be used on any segment/selector including the Code Segment.
2.3.7 SVLDT - Save LDT and Descriptor
Instruction
SVLDT
Opcode
0F 7A [mod 000 r/m]
Parameters
mem80
Core Clocks
18
SVLDT saves the Local Descriptor Table Selector and non-programmer visible descriptor informa-
tion at the address location mem80.
2.3.8 SVTS - Save TSR and Descriptor
Instruction
SVTS
Opcode
0F 7C
Parameters
mem80
Core Clocks
18
SVTS saves the Task Register and its associated descriptor to address location mem80.
20
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