PM Opc DIV
DIV = Divide
|CE D9||DIV HL, A||52|
; DIV HL, A ; ; HL is the Dividend ; A is the Divisor ; L will be the Quotient ; H will be the Remainder/Rest Ds = HL ÷ A IF Ds < 256 THEN L = Ds ; Quotient H = HL % A ; Remainder ENDIF
Can throw Division by Zero if Divisor is 0 (We need to research more about this).
If Quotient can't fit in 8-Bits range, Overflow flag will be set and the result won't be saved.
"16-Bits Register HL" divide by "8-Bits Register A", Quotient will be stored at "8-Bits Register L" and Remainder will be stored at "8-Bits Register H".
Zero: Set when result is 0
Carry: Always Clear
Overflow: Set when Quotient can't fit in 8-Bits range
Sign: Set when bit 7 of Quotient is 1
; A = 0x02 ; HL = 0x0007 DIV HL, A ; L = 0x03 (0x0007 / 0x02 = 0x03 (with rest 0x01)) ; H = 0x01 (Remainder/Rest) ; F = (Zero=0):(Carry=0):(Overflow=0):(Sign=0)
; A = 0x00 ; HL = 0x0007 DIV HL, A ; (0x0007 / 0x00 = Division by Zero) ; HL = 0x???? (Unpredictable result!?) ; F = (Zero=?):(Carry=?):(Overflow=?):(Sign=?) ; - Throw Division by Zero Exception
; A = 0x02 ; HL = 0xFFFD DIV HL, A ; (0xFFFD / 0x02 = 0x7FFE (with rest 0x01)) ; HL = 0xFFFD (Results are unchanged since Quotient exceed 8-Bits range) ; F = (Zero=0):(Carry=0):(Overflow=1):(Sign=1)