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8bitworkshop/presets/msx/helloworld.s
2019-08-17 18:42:21 -04:00

35 lines
586 B
ArmAsm

; Hello World example
; ROM routine for character output
CHGET = #0x009F
CHPUT = #0x00A2
; Bank 1
.area _CODE
; MSX cartridge header @ 0x4000 - 0x400f
.dw 0x4241
.dw Init
.dw Init
.dw 0
.dw 0
.dw 0
.dw 0
.dw 0
; initialize and print message
Init:
ld hl,#msg
call puts
jp Init ; loop forever
puts: ; print 0-terminated string in HL
ld a,(hl)
or a
ret z
call CHPUT ; displays one character in A
inc hl
jr puts
; ASCII message + CR LF
msg: .ascii "Hello, world!\n\r\0"