Generate lower case ASCII alphabet: Difference between revisions
Generate lower case ASCII alphabet (view source)
Revision as of 20:09, 28 October 2021
, 2 years ago→{{header|ARM Assembly}}
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<lang ApplesoftBasic>L$="":FORI=1TO26:L$=L$+CHR$(96+I):NEXT</lang>
=={{header|ARM Assembly}}==
{{trans|Z80 Assembly}}
Uses VASM syntax. PrintString routine courtesy of [http://www.chibiakumas.com Chibiakumas]
Hardware: Game Boy Advance (ARM7TDMI)
<lang ARM Assembly>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</lang>
[https://ibb.co/4SbsgzP Picture of output]
=={{header|Arturo}}==
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{{out}}
<pre>a b c d e f g h i j k l m n o p q r s t u v w x y z</pre>
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