INSTRUCTION SET REFERENCE

Table A-6. Instruction Set (Continued)

Mnemonic

 

 

 

Operation

 

 

 

 

Instruction Format

 

 

 

 

ANDB

LOGICAL AND BYTES. ANDs the two source

 

DEST, SRC1, SRC2

(3 operands)

byte operands and stores the result into the

ANDB

Dbreg, Sbreg, baop

 

destination operand. The result has ones in

 

(010100aa) (baop) (Sbreg) (Dbreg)

 

only the bit positions in which both operands

 

 

 

 

had a “1” and zeros in all other bit positions.

 

 

 

(DEST) (SRC1) AND (SRC2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PSW Flag Settings

 

 

 

 

 

 

Z

N

C

V

VT

ST

 

 

 

 

 

0

 

0

 

 

 

 

 

 

 

BMOV

BLOCK MOVE. Moves a block of word data

 

PTRS, CNTREG

 

from one location in memory to another. The

BMOV

lreg, wreg

 

source and destination addresses are

 

(11000001) (wreg) (lreg)

 

calculated using the indirect with autoin-

 

 

 

 

crement addressing mode. A long register

 

 

 

(PTRS) addresses the source and destination

NOTE: The pointers are autoincre-

 

pointers, which are stored in adjacent word

 

 

mented during this instruction.

 

registers. The source pointer (SRCPTR) is

 

 

 

However, CNTREG is not decre-

 

the low word and the destination pointer

 

 

 

mented. Therefore, it is easy to

 

(DSTPTR) is the high word of PTRS. A word

 

 

 

unintentionally create a long,

 

register (CNTREG) specifies the number of

 

 

 

uninterruptible operation with the

 

transfers. The blocks of word data can be

 

 

 

BMOV instruction. Use the

 

located anywhere in register RAM, but should

 

 

 

BMOVI instruction for an interrupt-

 

not overlap.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ible operation.

 

COUNT

 

 

 

 

 

 

 

 

 

(CNTREG)

 

 

 

 

 

 

 

LOOP: SRCPTR

(PTRS)

 

 

 

 

 

 

DSTPTR (PTRS + 2)

 

 

 

 

 

 

(DSTPTR) (SRCPTR)

 

 

 

 

 

 

(PTRS) SRCPTR + 2

 

 

 

 

 

 

(PTRS + 2) DSTPTR + 2

 

 

 

 

 

COUNT

COUNT – 1

 

 

 

 

 

 

if COUNT 0 then

 

 

 

 

 

 

 

 

go to LOOP

 

 

 

 

 

 

 

 

 

end_if

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PSW Flag Settings

 

 

 

 

 

 

Z

N

C

V

VT

ST

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A-9

Page 398
Image 398
Intel 8XC196MC, 8XC196MD, 8XC196MH manual PTRS, Cntreg, Count