armitage_asm_display

ds test
mov r8,r14    ; back up link-address in r8

mov r2,#0     ; r2 = 0
loopa:

mov r1,#99    
lsl r1,r1,#4  ; r1 = 100<<4 = 1600 (40x40 zeichen display)

loopb:

lsl r0,r2,#0  ; r0 = r2

sym display      ; r7 = display address
add r7,r7,r1     ; add offset in r1 to display address
strb r0,[r7,#0]  ; output r0 to display

add r2,r2,#1     ; r2++

sub r1,r1,#1     ; r1--
cmp r1,#0        ; if r1 != 0
bne loopb        ; goto loopb

mov r11,r2       ; backup r2 in r11 (gets clobbered)
sym readKey      ; load readKey function pointer in r7
call             ; macro to call r7 and return
cmp r0,#32       ; key is in r0, is it space (32)?
mov r2,r11       ;    [restore r2]
bne loopa        ; no, go to loopa

bx r8            ; return from program