Miscellaneous Instruction Execution Times - Motorola M68000 User Manual

Instruction

7.11 MISCELLANEOUS INSTRUCTION EXECUTION TIMES

Tables 7-13 and 7-14 list the timing data for miscellaneous instructions. The total number
of clock periods, the number of read cycles, and the number of write cycles are shown in
the previously described format. The number of clock periods, the number of read cycles,
and the number of write cycles, respectively, must be added to those of the effective
address calculation where indicated by a plus sign (+).
MOTOROLA M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL
Freescale Semiconductor, Inc.
Table 7-12. Multiprecision Instruction
Execution Times
Size
ADDX Byte
Word
Long
CMPM Byte,
Word
Long
SUBX Byte, \
Word
Long
ABCD Byte
SBCD Byte
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op Dn, Dn op M, M
8(2/0) 22(4/1)
8(2/0) 50(6/2)
12(2/0) 58(10/4)
— 16(4/0)
— 24(6/0)
— 40(10/0)
8(2/0) 22(4/1)
8(2/0) 50(6/2)
12(2/0) 58(10/4)
10(2/0) 20(4/1)
10(2/0) 20(4/1)
7- 9