KS57C2308/P2308/C2316/P2316
SAM47 INSTRUCTION SET
5-27
ADS
— Add And Skip On Overflow
ADS
(Continued)
Examples:
2. If the extended accumulator contains the value 0C3H, register pair HL the value 12H, and
the carry flag = "0":
ADS
EA,HL
; EA
←
0C3H + 12H = 0D5H
JPS
XXX
; Jump to XXX; no skip after ADS.
3. If “ADC A,@HL” is followed by an “ADS A,#im”, the ADC skips on overflow to the instruction
immediately after the ADS. An “ADS A,#im” instruction immediately after the “ADC A,@HL”
does not skip even if overflow occurs. This function is useful for decimal adjustment
operations.
a. 8 + 9 decimal addition (the contents of the address specified by the HL register is 9H):
RCF
; C
←
"0"
LD
A,#8H
; A
←
8H
ADS
A,#6H
; A
←
8H + 6H = 0EH
ADC
A,@HL
; A
←
0EH + 9H + C(0) = 7H, C
←
"1"
ADS
A,#0AH
; Skip this instruction because C = "1" after ADC 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
ADS
A,#6H
; A
←
3H + 6H = 9H
ADC
A,@HL
; A
←
9H + 4H + C(0) = 0DH, C
←
"0"
ADS
A,#0AH
; No skip. A
←
0DH + 0AH = 7H
; (The skip function for “ADS A,#im” is inhibited after an
; “ADC A,@HL” instruction even if an overflow occurs.)
JPS
XXX
Summary of Contents for KS57C2308
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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