AMD-K6 AMD [Advanced Micro Devices], AMD-K6 Datasheet - Page 40

• Manufacturer Part Number: AMD-K6
• Description: AMD-K6 Processor
• Manufacturer: AMD [Advanced Micro Devices]

AMD-K6
Figure 6. EAX Register with 16-Bit and 8-Bit Name Components
22
31
®
Processor Data Sheet
AL (low order bits). The same naming convention applies to
EBX, ECX, and EDX. EDI, ESI, ESP, and EBP can be used as
smaller 16-bit registers called DI, SI, SP, and BP respectively,
but these registers do not have 8-bit versions. Figure 6 shows the
EAX register with its name components, and Table 3 lists the
dwo rd ( 3 2 b i t s ) g e n e ra l -p u rp o s e re g i s t e rs a n d t h e i r
corresponding word (16 bits) and byte (8 bits) versions.
Table 3.
32-Bit Name
(Dword)
EAX
EDX
EBX
ECX
ESP
EBP
EDI
ESI
General-Purpose Register Dword, Word, and Byte Names
Preliminary Information
Software Environment
16-Bit Name
16
(Word)
EAX
AX
DX
BX
CX
SP
BP
DI
SI
15
AH
(High-order Bits)
8-Bit Name
DH
AH
BH
CH
–
–
–
–
8
AX
7
(Low-order Bits)
8-Bit Name
AL
20695H/0—March 1998
AL
BL
CL
DL
–
–
–
–
Chapter 3
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