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 bit 15 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)