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S1C63000 CORE CPU MANUAL EPSON 137
CHAPTER 4: INSTRUCTION SET
SUB [%ir],%r
SUB [%ir]+,%r Subtract r reg. from location [ir reg.] and increment ir reg. 2 cycles
Function: [ir] ← [ir] - r, ir ← ir + 1
Subtracts the content of the r register (A or B) from the data memory addressed by the ir
register (X or Y). Then increments the ir register (X or Y). The flags change due to the operation
result of the data memory and the increment result of the ir register does not affect the flags.
Code:
Mnemonic MSB LSB
SUB [%X]+,%A 11000011010011869H
SUB [%X]+,%B 1100001101101186DH
SUB [%Y]+,%A 1100001101011186BH
SUB [%Y]+,%B 1100001101111186FH
Flags: EICZ
↓ – ↕↕
Mode: Src: Register direct
Dst: Register indirect
Extended addressing: Invalid
Subtract r reg. from location [ir reg.] 2 cycles
Function: [ir] ← [ir] - r
Subtracts the content of the r register (A or B) from the data memory addressed by the ir
register (X or Y).
Code:
Mnemonic MSB LSB
SUB [%X],%A 11000011010001868H
SUB [%X],%B 1100001101100186CH
SUB [%Y],%A 1100001101010186AH
SUB [%Y],%B 1100001101110186EH
Flags: EICZ
↓ – ↕↕
Mode: Src: Register direct
Dst: Register indirect
Extended addressing: Valid
Extended LDB %EXT,imm8
operation: SUB [%X],%r [00imm8] ← [00imm8] - r (00imm8 = 0000H + 00H to FFH)
LDB %EXT,imm8
SUB [%Y],%r [FFimm8] ← [FFimm8] - r (FFimm8 = FF00H + 00H to FFH)