Motorola CPU32 Reference Manual page 100

CHK2
Instruction Format:
15 14 13
0 0 0
D/A REGISTER
Instruction Fields:
Size field — Specifies the size of the operation.
00 — Byte operation
01 — Word operation
10 — Long operation
Effective Address field — Specifies the location of the bounds operands. Only control
addressing modes are allowed as shown:
Addressing Mode
Dn
An
(An)
(An) +
– (An)
(d , An)
16
(d , An, Xn)
8
(bd, An, Xn)
D/A field — Specifies whether an address register or data register is to be checked.
0 — Data register.
1 — Address register.
Register field — Specifies the address or data register that contains the value to be
checked.
MOTOROLA
4-52
Check Register Against Bounds
12 11 10 9
0 0 SIZE
1 0 0
Mode Register
— —
— —
010 Reg. number: An
— —
— —
101 Reg. number: An
110 Reg. number: An
110 Reg. number: An
INSTRUCTION SET
8 7 6 5
0 0 0
0 0 0 0
Addressing Mode
(xxx).W
(xxx).L
#〈data〉
(d , PC)
16
(d , PC, Xn)
8
(bd, PC, Xn)
CHK2
4 3 2 1
EFFECTIVE ADDRESS
MODE REGISTER
0 0 0 0
Mode Register
111 000
111 001
— —
111 010
111 011
111 011
REFERENCE MANUAL
0
0
CPU32