Intel 8253 - Page 483

4/17/98 6-83 Addressing Modes and Data Types
CMP Rd, direct
Bytes: 3
Clocks: 4
Operation: (Rd) - (direct)
Encoding:
byte 3: lower 8 bits of direct
CMP Rd, #data8
Bytes: 3
Clocks: 3
Operation: (Rd) - #data8
Encoding:
byte 3: #data8
CMP Rd, #data16
Bytes: 4
Clocks: 3
Operation: (Rd) - #data16
Encoding:
byte 3: upper 8 bits of #data16
byte 4: lower 8 bits of #data16
CMP [Rd], #data8
Bytes: 3
Clocks: 4
Operation: ((WS:Rd)) - #data8
Encoding:
byte 3: #data8
0 1 0 0 SZ 1 1 0 d d d d 0 direct: 3 bits
1 0 0 1 0 0 0 1 d d d d 0 1 0 0
1 0 0 1 1 0 0 1 d d d d 0 1 0 0
1 0 0 1 0 0 1 0 0 d d d 0 1 0 0