ST486DX ST Microelectronics, ST486DX Datasheet - Page 12

• Manufacturer Part Number: ST486DX
• Description: PROGRAMMING MANUAL
• Manufacturer: ST Microelectronics

ST486DX - SMM IMPLEMENTATION
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.
2.3.8
SVTS saves the Task Register and its associated descriptor to address location mem80.
2.3.6
2.3.7
SVLDT saves the Local Descriptor Table Selector and non-programmer visible descriptor informa-
tion at the address location mem80.
20
Instruction
Instruction
Instruction
SVLDT
SVDC
SVTS
SVTS - Save TSR and Descriptor
SVDC - Save Register and Descriptor
SVLDT - Save LDT and Descriptor
0F 78 [mod sreg3 r/m]
0F 7A [mod 000 r/m]
Opcode
Opcode
Opcode
0F 7C
sreg3, mem80
Parameters
Parameters
Parameters
mem80
mem80
Core Clocks
Core Clocks
Core Clocks
18
18
18