CHAPTER 4: INSTRUCTION SET

ADC %B,%A,n4 Add with carry A reg. to B reg. in specified radix

2 cycles

Function: B ← N's adjust (B + A + C)

Adds the content of the A register and carry (C) to the B register. The operation result is adjusted with n4 as the radix. The C flag is set by a carry according to the radix.

Code:

Mnemonic

 

 

MSB

LSB

 

ADC %B,%A,n4

 

1

0

0

0

0

1

1

0

1

[10H-n4]

10D0H–10DFH

 

 

 

 

 

 

 

 

 

 

Flags:

E

 

I

C

 

Z

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mode:

Src: Register direct

 

 

 

 

 

 

 

 

 

 

 

 

 

Dst: Register direct

 

 

 

 

 

 

 

 

 

 

 

 

 

Extended addressing: Invalid

 

 

Note: n4 should be specified with a value from 1 to 16.

ADC %B,[%ir],n4 Add with carry location [ir reg.] to B reg. in specified radix

2 cycles

Function: B ← N's adjust (B + [ir] + C)

Adds the content of the data memory addressed by the ir register (X or Y) and carry (C) to the B register. The operation result is adjusted with n4 as the radix. The C flag is set by a carry according to the radix.

Code:

Mnemonic

 

MSB

 

 

 

 

 

 

 

LSB

 

 

 

ADC %B,[%X],n4

 

1

 

1

1

0

1

1

1

0

0

[10H-n4]

1DC0H–1DCFH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ADC %B,[%Y],n4

 

1

 

1

1

0

1

1

1

1

0

[10H-n4]

1DE0H–1DEFH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Flags:

E

I

C

 

 

Z

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mode:

Src: Register indirect

 

 

 

 

 

 

 

 

 

 

 

 

 

Dst: Register direct

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Extended addressing: Valid

 

 

 

 

 

 

 

 

 

 

Extended

LDB

%EXT,imm8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

operation: ADC

%B,[%X],n4

 

B

N’s adjust (B + [00imm8] + C) (00imm8 = 0000H + 00H to FFH)

 

LDB

%EXT,imm8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ADC

%B,[%Y],n4

 

B

N’s adjust (B + [FFimm8] + C) (FFimm8 = FF00H + 00H to FFH)

Note: n4 should be specified with a value from 1 to 16.

S1C63000 CORE CPU MANUAL

EPSON

65