PM Opc ADD16

ADD = Addition (16-Bits)

Hex	Mnemonic	Cycles
C0 nn nn	ADD BA, #nnnn	12
C1 nn nn	ADD HL, #nnnn	12
C2 nn nn	ADD X, #nnnn	12
C3 nn nn	ADD Y, #nnnn	12
CF 68 nn nn	ADD SP, #nnnn	16
CF 00	ADD BA, BA	16
CF 01	ADD BA, HL	16
CF 02	ADD BA, X	16
CF 03	ADD BA, Y	16
CF 20	ADD HL, BA	16
CF 21	ADD HL, HL	16
CF 22	ADD HL, X	16
CF 23	ADD HL, Y	16
CF 40	ADD X, BA	16
CF 41	ADD X, HL	16
CF 42	ADD Y, BA	16
CF 43	ADD Y, HL	16
CF 44	ADD SP, BA	16
CF 45	ADD SP, HL	16

Execute

#nnnn    = Immediate unsigned 16-Bits
BA       = Register BA: (B shl 8) or A
HL       = Register HL: (H shl 8) or L
X        = Register X
Y        = Register Y
SP       = Register SP (Stack Pointer)

; ADD Ds, Sc
;
; Ds = Destination
; Sc = Source

Ds = Ds + Sc

Description

16-Bits Source adds to the 16-Bits Destination.

Conditions

Zero: Set when result is 0

Carry: Set when result is >= 65536

Overflow: Set when result overflow 16-bits signed range (< -32768 OR > 32767)

Sign: Set when 15th bit of the result is 1

Examples

; BA = 0x0EF0
ADD BA, $1337
; BA = 0x2227 (0x0EF0 + 0x1337 = 0x(0)2227)
; F = (Zero = 0):(Carry = 0):(Overflow=0):(Sign=0)

; HL = 0xBB7E
; BA = 0xCF12
ADD BA, HL
; HL = 0xBB7E
; BA = 0x8A90 (0xCF12 + 0xBB7E = 0x(1)8A90)
; F = (Zero = 0):(Carry = 1):(Overflow=0):(Sign=1)

; X = 0xBEEF
; BA = 0xDEAD
ADD BA, X
; X = 0xBEEF
; BA = 0x9D9C (0xDEAD + 0xBEEF = 0x(1)9D9C)
; F = (Zero = 0):(Carry = 1):(Overflow=1):(Sign=0)

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