Epson S1C63000 - Manual (Page 131)

S1C63000 CORE CPU MANUAL EPSON 125
CHAPTER 4: INSTRUCTION SET
SBC %r,[%ir]+ Subtract with carry location [ir reg.] from r reg. and increment ir reg. 1 cycle
Function: r
←
r - [ir] - C, ir
←
ir + 1
Subtracts the content of the data memory addressed by the ir register (X or Y) and carry (C)
from the r register (A or B). Then increments the ir register (X or Y). The flags change due to the
operation result of the r register and the increment result of the ir register does not affect the
flags.
Code: Mnemonic MSB LSB
SBC %A,[%X]+ 1 1 0 0 0 1 1 1 0 0 0 0 1 18E1H
SBC %A,[%Y]+ 1 1 0 0 0 1 1 1 0 0 0 1 1 18E3H
SBC %B,[%X]+ 1 1 0 0 0 1 1 1 0 0 1 0 1 18E5H
SBC %B,[%Y]+ 1 1 0 0 0 1 1 1 0 0 1 1 1 18E7H
Flags: E I C Z
↓
– ↕ ↕
Mode: Src: Register indirect
Dst: Register direct
Extended addressing: Invalid
SBC [%ir],%r Subtract with carry r reg. from location [ir reg.] 2 cycles
Function: [ir]
←
[ir] - r - C
Subtracts the content of the r register (A or B) and carry (C) from the data memory addressed
by the ir register (X or Y).
Code: Mnemonic MSB LSB
SBC [%X],%A 1 1 0 0 0 1 1 1 0 1 0 0 0 18E8H
SBC [%X],%B 1 1 0 0 0 1 1 1 0 1 1 0 0 18ECH
SBC [%Y],%A 1 1 0 0 0 1 1 1 0 1 0 1 0 18EAH
SBC [%Y],%B 1 1 0 0 0 1 1 1 0 1 1 1 0 18EEH
Flags: E I C Z
↓
– ↕ ↕
Mode: Src: Register direct
Dst: Register indirect
Extended addressing: Valid
Extended LDB %EXT,imm8
operation: SBC [%X],%r [00imm8]
←
[00imm8] - r - C (00imm8 = 0000H + 00H to FFH)
LDB %EXT,imm8
SBC [%Y],%r [FFimm8]
←
[FFimm8] - r - C (FFimm8 = FF00H + 00H to FFH)