x86 Opcode UMOV

Opcode UMOV

CPU: AMD Am386SXLV,Am386DXLV
AMD 486s
IBM 486SLC2
Type of Instruction: Special System

Instruction: UMOV dest,sorc

Description:

dest <- sorc;

Note!!!!!: But all memory operands placed in Main memory only !
( i.e. not in SMRAM then in SMM )

WARNING: UMC's CPUs hang on execution this instruction !!!!!!
check that CPU is none UMC's before

Note: On Cyrix's CPUs UMOV opcodes do nothing. This way used to
determination of Cyrix Microprocessors.

Note: Pentium P54C never support this instruction

Flags Affected: None

CPU mode: RM?,PM?,VM?,SMM

+++++++++++++++++++++++
Physical Form: UMOV r/m8,r8
COP (Code of Operation) : 0FH 10H Postbyte

Clocks:
Am386SXLV or AM386DXLV: 2/2
IBM 486SLC2 : 4
+++++++++++++++++++++
Physical Form: UMOV r/m16,r16
UMOV r/m32,r32
COP (Code of Operation) : 0FH 11H Postbyte

Clocks:
Am386SXLV or AM386DXLV: 2/2
IBM 486SLC2 : 4
+++++++++++++++++++++++
Physical Form: UMOV r8,r/m8
COP (Code of Operation) : 0FH 12H Postbyte

Clocks:
Am386SXLV or AM386DXLV: 2/4
IBM 486SLC2 : 4
+++++++++++++++++++++
Physical Form: UMOV r16,r/m16
UMOV r32,r/m32
COP (Code of Operation) : 0FH 13H Postbyte

Clocks:
Am386SXLV or AM386DXLV: 2/4
IBM 486SLC2 : 4