Data commit

Task/Copy-a-string/Z80-Assembly/copy-a-string-1.z80

@@ -0,0 +1,8 @@
+ld hl,MyString
+ld (PointerVariable),hl
+
+MyString:          ;assembler equates this label to a memory location at compile time
+byte "Hello",0
+
+PointerVariable:
+word 0             ;placeholder for the address of the above string, gets written to by the code above.

Task/Copy-a-string/Z80-Assembly/copy-a-string-2.z80

@@ -0,0 +1,4 @@
+ld a,<MyString           ; < represents the low byte of the address. Some assemblers use LOW() with the label in the parentheses.
+ld (PointerVariable),a
+ld a,>MyString           ; > represents the high byte of the address. Some assemblers use HIGH() with the label in the parentheses.
+ld (PointerVariable+1),a

Task/Copy-a-string/Z80-Assembly/copy-a-string-3.z80

@@ -0,0 +1,12 @@
+StrCpy:
+;input: HL = base address of string you wish to copy
+;       DE = where you want to copy it to.
+;       This program assumes that the string is null-terminated, and that there is enough RAM to hold the entire string.
+
+        ld a,(hl)
+        or a        ;compare A to 0.
+        ret z
+        ld (de),a
+        inc hl
+        inc de
+        jr StrCpy

Task/Copy-a-string/Z80-Assembly/copy-a-string-4.z80

@@ -0,0 +1,15 @@
+ld hl,myString
+ld c,(hl)
+ld b,0
+inc c
+ld de,buffer
+ldir  ;copies from (HL) to (DE), BC times.
+ret
+
+myString:
+byte 5  ;len("Hello")
+byte "Hello"
+
+buffer:
+byte 0
+byte 0,0,0,0,0