DESCRIPTION OF INSTRUCTIONS

48. JNZ code address (Jump if accumulator is not 0)

 

 

7

 

 

 

 

 

 

 

 

 

0

 

Instruction code

:

0

 

1

1

1

 

 

0

0

0

0

Byte 1

 

 

7

 

 

 

 

 

 

 

 

 

0

 

Relative offset

 

R7

R6

R5

R4

 

 

R3

R2

R1

R0

Byte 2

Operations

: (PC)(PC)+2

 

 

 

 

 

 

 

 

 

 

IF (A)0

 

 

 

 

 

 

 

 

 

 

 

THEN

 

 

 

 

 

 

 

 

 

 

 

 

(PC)(PC)+relative offset

 

 

 

 

Number of bytes

: 2

 

 

 

 

 

 

 

 

 

 

 

Number of cycles

: 2

 

 

 

 

 

 

 

 

 

 

 

Flags

:

C

AC

F0

RS1

 

 

RS0

OV

F1

P

 

(PSW)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Description

: Control is shifted to a relative jump address if the accumulator

 

 

contents are not 0. Control is shifted to the next address

 

 

following this instruction if the contents are 0.

 

305

Page 312
Image 312
Sonic Alert msm83c154s, msm80154s, msm85c154hvs user manual JNZ code address Jump if accumulator is not, 305