Difference between revisions of "User:CoBB"

Revision as of 03:32, 25 February 2006

Ez az Ã©n kis jÃ¡tszÃ³terem.

Instruction	Opcode	Time	S	Z	X	H	Y	P	N	C	Effect
call A	`11001101 Al Ah`	17	-	-	-	-	-	-	-	-	sp -= 2, (sp) := pc, pc := A
ccf	`00111111`	4	-	-	v	X	v	-	0	X	hf := cf, cf := !cf
ld R1,R2	`01xxxyyy`	4	-	-	-	-	-	-	-	-	R1 := R2
pop P	`11xx0001`	10	-	-	-	-	-	-	-	-	P := (sp), sp += 2
push P	`11xx0101`	11	-	-	-	-	-	-	-	-	sp -= 2, (sp) := P
ret	`11001001`	10	-	-	-	-	-	-	-	-	pc := (sp), sp += 2

Notation	Meaning	Respective opcode bits
A	16-bit address	Al - low byte, Ah - high byte
P	16-bit register pair: bc, de, hl, af	00, 01, 10, 11
Q	16-bit register: bc, de, hl, sp	00, 01, 10, 11
R	8-bit general purpose register: a, b, c, d, e, h, l	111, 000, 001, 010, 011, 100, 101

@@ Line 8: / Line 8: @@
 |-
 | call A || <tt>11001101 Al Ah</tt> || 17 || - || - || - || - || - || - || - || - || sp -= 2, (sp) := pc, pc := A
+|-
+| ccf || <tt>00111111</tt> || 4 || - || - || v || X || v || - || 0 || X || hf := cf, cf := !cf
 |-
 | ld R1,R2 || <tt>01xxxyyy</tt> || 4 || - || - || - || - || - || - || - || - || R1 := R2
@@ Line 30: / Line 32: @@
 | R || 8-bit general purpose register: a, b, c, d, e, h, l || 111, 000, 001, 010, 011, 100, 101
 |}
+=== Flags ===
+* - = no change
+* 0 = always reset
+* 1 = always set
+* X = change, described under Effect
+* v = OR with the respective bit of the accumulator