KS57C2308/P2308/C2316/P2316
SAM47 INSTRUCTION SET
5-81
SBC
— Subtract With Carry
SBC
(Continued)
Examples:
3. If SBC A,@HL is followed by an ADS A,#im, the SBC skips on “no borrow” to the instruction
immediately after the ADS. An “ADS A,#im” instruction immediately after the “SBC A,@HL”
instruction does not skip even if an overflow occurs. This function is useful for decimal
adjustment operations.
a. 8 – 6 decimal addition (the contents of the address specified by the HL register is 6H):
RCF
; C
←
"0"
LD
A,#8H
; A
←
8H
SBC
A,@HL
; A
←
8H – 6H – C(0) = 2H, C
←
"0"
ADS
A,#0AH
; Skip this instruction because no borrow after SBC result
JPS
XXX
b. 3 – 4 decimal addition (the contents of the address specified by the HL register is 4H):
RCF
; C
←
"0"
LD
A,#3H
; A
←
3H
SBC
A,@HL
; A
←
3H – 4H – C(0) = 0FH, C
←
"1"
ADS
A,#0AH
; No skip. A
←
0FH + 0AH = 9H
; (The skip function of “ADS A,#im” is inhibited after a
; “SBC A,@HL” instruction even if an overflow occurs.)
JPS
XXX
Summary of Contents for C2316
Page 30: ...ADDRESS SPACES KS57C2308 P2308 C2316 P2316 2 22 NOTES ...
Page 168: ...SAM47 INSTRUCTION SET KS57C2308 P2308 C2316 P2316 5 94 NOTES ...
Page 170: ......
Page 206: ...POWER DOWN KS57C2308 P2308 C2316 P2316 8 8 NOTES ...
Page 210: ...RESET KS57C2308 P2308 C2316 P2316 9 4 NOTES ...
Page 222: ...I O PORTS KS57C2308 P2308 C2316 P2316 10 12 NOTES ...
Page 272: ...LCD CONTROLLER DRIVER KS57C2308 P2308 C2316 P2316 12 24 NOTES ...
Page 280: ...SERIAL I O INTERFACE KS57C2308 P2308 C2316 P2316 13 8 NOTES ...
Page 294: ...MECHANICAL DATA KS57C2308 P2308 C2316 P2316 15 2 NOTES ...
Page 310: ...KS57P2308 P2316 OTP KS57C2308 P2308 C2316 P2316 16 16 NOTES ...
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