ALXD800EEXJ2VD AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VD Datasheet - Page 618

• Manufacturer Part Number: ALXD800EEXJ2VD
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of ALXD800EEXJ2VD

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

8.1.4
The reg field (Table 8-10) determines which general registers are to be used. The selected register is dependent on
whether a 16-bit or 32-bit operation is current and on the status of the w bit.
8.1.4.1
The sreg2 field (Table 8-11) is a 2-bit field that allows one of the four 286-type segment registers to be specified.
8.1.4.2
The sreg3 field (Table 8-12) is 3-bit field that is similar to the sreg2 field, but allows use of the FS and GS segment registers.
618
sreg2 Field
sreg3 Field
reg
000
001
010
011
100
101
110
111
reg Field
sreg2 Field (ES, CS, SS, DS Register Selection)
sreg3 Field (FS and GS Segment Register Selection)
000
001
010
011
100
101
110
111
00
01
10
11
Table 8-12. sreg3 Field (FS and GS Segment Register Selection)
33234C
w = 0
AH
DH
BH
CL
DL
AL
BL
CH
16-Bit Operation
Table 8-11. sreg2 Field Encoding
Table 8-10. reg Field
w = 1
CX
DX
AX
BX
SP
BP
DI
SI
Segment Register Selected
Segment Register Selected
Undefined
Undefined
ES
CS
SS
DS
ES
CS
SS
DS
GS
FS
w = 0
AH
CH
DH
BH
AL
CL
DL
BL
AMD Geode™ LX Processors Data Book
32-Bit Operation
w = 1
EAX
ECX
EDX
EBX
ESP
EBP
ESI
EDI
Instruction Set