MSM80C154S/83C154S/85C154HVS

5. ADD A, data address (Add memory)

 

 

 

7

 

 

 

 

 

 

 

 

 

 

0

 

Instruction code

:

 

0

 

0

 

 

1

 

0

0

1

0

1

Byte 1

 

 

 

7

 

 

 

 

 

 

 

 

 

 

0

 

Data address

 

a7

a6

a5

a4

a3 a2 a1

a0

Byte 2

Operation

: (A)(A)+(data address)

 

 

 

 

Number of bytes

: 2

 

 

 

 

 

 

 

 

 

 

 

 

 

Number of cycles

: 1

 

 

 

 

 

 

 

 

 

 

 

 

 

Flags

:

 

C

AC

F0

RS1

RS0

OV

F1

P

 

(PSW)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Description

: The specified data address contents are added to the

 

 

accumulator. The result is placed in the accumulator, and the

 

 

flags are updated.

 

 

 

 

 

 

Example ADD A, P1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

0

 

 

 

 

 

Instruction code

:

0

0

1

0

 

0

1

0

1

Byte 1

 

 

 

 

7

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

1

0

0

1

 

0

0

0

0

Byte 2

 

 

 

Before execution Accumulator

0 1 1 1 0 0 1 0

7

0

Port 1(90H)

 

1 1 0 0 0 1 1 0

70

After execution Accumulator

0 0 1 1 1 0 0 0

7

0

Port 1(90H)

 

1 1 0 0 0 1 1 0

70

250

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Sonic Alert msm85c154hvs, msm83c154s, msm80154s user manual MSM80C154S/83C154S/85C154HVS ADD A, data address Add memory, 250