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John's Home Page PC Now 286 Programming Model
286 Register Set
 "General" Registers  
AX
AH (4)AL (0)
 0 Accumulator
CX
CH (5)CL (1)
 1 Counter
DX
DH (6)DL (2)
 2 Data
BX
BH (7)BL (3)
 3 Base
SP
 
 4 Stack Pointer
BP
 
 5 Base Pointer
SI
 
 6 Source Index
DI
 
 7 Destination Index
 Segment Registers  
ES
 
 0 Extra Segment
CS
 
 1 Code Segment
SS
 
 2 Stack Segment
DS
 
 3 Data Segment
 Program Registers  
IP
 
 Instruction Pointer
F
 
 Flags
Memory Space
224-1
 
0
I/O Space
216-1
 
0
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