Pokémon mini Development Documentation

ADC = Addition with Carry (16-bits)

Hex	Mnemonic	Cycles
CF 04	ADC BA,BA	4
CF 05	ADC BA,HL	4
CF 06	ADC BA,IX	4
CF 07	ADC BA,IY	4
CF 24	ADC HL,BA	4
CF 25	ADC HL,HL	4
CF 26	ADC HL,IX	4
CF 27	ADC HL,IY	4
CF 60 nn mm	ADC BA,#mmnn	4
CF 61 nn mm	ADC HL,#mmnn	4

Execute

#mmnn = Immediate unsigned 16-bits
BA    = Register BA: (B shl 8) or A
HL    = Register HL: (H shl 8) or L
IX    = Register IX
IY    = Register IY

; ADC Ds, Sc
;
; Ds = Destination
; Sc = Source

Ds = Ds + Sc + Carry

Description

16-bits Source and Carry adds to the 16-bits Destination.

Conditions

• Zero: Set when result is 0
• Carry: Set when result is >= 65536
• Overflow: Set when result exceeds 16-bits signed range (< -32768 OR > 32767)
• Negative: Set when bit 15 of the result is 1

Examples

; BA = 0x0EF0
; SC = (Carry=1)
ADC BA, $1337
; BA = 0x2228 (0x0EF0 + 0x1337 + 0x0001 = 0x(0)2228)
; SC = (Zero=0):(Carry=0):(Overflow=0):(Negative=0)

; HL = 0xBB7E
; BA = 0xCF12
; SC = (Carry=0)
ADC BA, HL
; HL = 0xBB7E
; BA = 0x8A90 (0xCF12 + 0xBB7E + 0x0000 = 0x(1)8A90)
; SC = (Zero=0):(Carry=1):(Overflow=0):(Negative=1)

; IX = 0xBEEF
; BA = 0xDEAD
; SC = (Carry=1)
ADC BA, IX
; IX = 0xBEEF
; BA = 0x9D9D (0xDEAD + 0xBEEF + 0x0001 = 0x(1)9D9D)
; SC = (Zero=0):(Carry=1):(Overflow=1):(Negative=0)

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