Data commit

Task/Generate-lower-case-ASCII-alphabet/ARM-Assembly/generate-lower-case-ascii-alphabet.arm

@@ -0,0 +1,26 @@
+ProgramStart:
+	mov sp,#0x03000000			;Init Stack Pointer
+	
+	mov r4,#0x04000000  		        ;DISPCNT -LCD Control
+	mov r2,#0x403    			;4= Layer 2 on / 3= ScreenMode 3
+	str r2,[r4]         	                ;hardware specific routine, activates Game Boy's bitmap mode
+
+	mov r0,#0x61				;ASCII "a"
+	mov r2,#ramarea
+	mov r1,#26					
+	
+rep_inc_stosb:                                  ;repeatedly store a byte into memory, incrementing the destination and the value stored
+                                                ;    each time.
+	strB r0,[r2]
+	add r0,r0,#1
+	add r2,r2,#1
+	subs r1,r1,#1
+	bne rep_inc_stosb
+	mov r0,#255		
+	strB r0,[r2]				;store a 255 terminator into r1
+	
+	mov r1,#ramarea
+	bl PrintString                          ;Prints a 255-terminated string using a pre-defined bitmap font. Code omitted for brevity
+
+forever:
+        b forever                               ;halt the cpu