Specifications

Arithmetic Operations-

Operation: (src) + (dst)

Condition Codes:

Z: set if (src) = 0; cleared otherwise

N: set if (src) < 0; cleared otherwise

C: not affected

V: cleared

Description: Moves the source operand to the destination location. The pre-

vious contents of the destination are lost. The contents of the source are

not affected.

The MOV instruction is a generalization of ‘load,” “store,” “setup,” ‘push,”

“pop,’ and interregister transfer operations.

General registers may be loaded with the contents of memory addresses with

instructions of the form:

MOV src, R

Registers may be loaded with a counter, and pointer values with MOV in-

structions:

MOV #n. R

iwhich loads the number n into register R)

Operands may be pushed onto a stack by:

MOV src, -(R)

and may be popped off a stack by:

MOV (R)+, dst

Interregister transfers are simply:

MOV RA, RB

(RA and RB are general registers)

Memory-to-memory transfers may be done with the MOV instruction in the

general form:

MOV src, dst

ADD

ADD WC. dsi

2.3~

6 WC

I I I I

dst ,

I I

(5 12 11 6 5 0

Operation: (src) + (dst) + (dst)

Condition Codes: Z: set if result = 0; cleared otherwise

N: set if result < 0; cleared otherwise

C: set if there was a carry from the most significant bit

of the result; cleared otherwise

V: set if there was arithmetic overflow as a result of the

operation, that is, if both dperands were of the same

sign and the result was of the opposite sign; cleared

otherwise