34 lines
1.2 KiB
NASM
34 lines
1.2 KiB
NASM
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; Hello World for Vectrex computer with 6809 CPU
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; by Frog ( http://frog.enlight.ru )
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; 24 March 2016
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;***************************************************************************
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org 0
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; this header required to identify ROM by Vectrex hardware (only year allowed to change)
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db "g GCE 2016", $80 ; 'g' is copyright sign
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dw $F600 ; music from the rom (no music)
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db $FC, $30, 33, -$2a ; height, width, rel y, rel x for app title
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db "HELLO WORLD", $80 ; app title, ending with $80
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db 0 ; end of header
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; main loop (required to redraw vectors on CRT screen)
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loop:
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; recalibrate CRT, reset beam to 0,0 (center of the screen)
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jsr $f192 ; Wait_Recal subroutine in ROM
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ldu #helloworld ; string address
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lda #10 ; Y
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ldb #-45 ; X
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jsr $f37a ; Print_Str_d subroutine in ROM
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bra loop
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; Text data ($80 - end of line)
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helloworld: db 'HELLO WORLD!',$80
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