Data commit

Task/Collections/Z80-Assembly/collections-1.z80

@@ -0,0 +1,2 @@
+List:
+byte 1,2,3,4,5

Task/Collections/Z80-Assembly/collections-2.z80

@@ -0,0 +1,25 @@
+List:
+byte 5             ;size byte
+byte 1,2,3,4,5     ;the actual list
+byte 0,0,0,0,0     ;free space
+
+;NOTE: separating the above list into different rows is just for visual clarity - it makes no difference to the CPU!
+
+AppendList:
+;input: A = the value you wish to append.     ​
+     ​ld hl,List
+     ld a,(HL)                  ;get the size byte
+     ld b,a                     ;store in B to use as loop counter for DJNZ
+     inc hl			;increment HL past the "size byte" to the actual data.
+         ​push hl                ;save this pointer for later
+	 push af                ;save the value we want to append for later.
+
+GotoEndOfList:
+           ​inc hl
+           ​djnz GotoEndOfList
+;now, HL points to the first "free" byte.
+	   pop af
+	   ld (HL),a		;store at the end of the list
+	pop hl			;go back to beginning of the list.
+	inc (hl)		;add 1 to the size byte.
+	ret