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81 lines
2.0 KiB
ArmAsm
81 lines
2.0 KiB
ArmAsm
; Multiple segment ATARI file format sample, using custom linker script.
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;
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; This sample defines a custom display-list screen with no code, writing all
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; memory areas directly.
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;
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; See the linker script (multi-xex.cfg) for the definition of memory areas and
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; segments.
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;
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; Compile with:
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; cl65 -tatari -Cmulti-xex.cfg multi-xex.s -o prog.xex
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.include "atari.inc"
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.macpack atari
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; Default RUNAD is "start", export that:
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.export start, show_load
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; Loader
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.segment "LOADER"
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show_load:
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ldx #0 ; channel 0
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lda #<msg_load
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sta ICBAL,x ; address
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lda #>msg_load
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sta ICBAH,x
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lda #$FF
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sta ICBLL,x ; length
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sta ICBLH,x
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lda #PUTREC
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sta ICCOM,x
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jmp CIOV
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msg_load:
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.byte "Loading....", ATEOL
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; We load color values directly into registers
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.segment "COLOR"
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.byte $16 ; COLOR0
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.byte $46 ; COLOR1
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.byte $00 ; COLOR2
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.byte $6A ; COLOR3
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.byte $82 ; COLOR4
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; We load our display list over page 6
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.segment "PAGE6"
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display_list:
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.byte DL_BLK8
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.byte DL_BLK8
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.byte DL_BLK8
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.byte DL_BLK8
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.byte DL_BLK8
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.byte DL_BLK8
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.byte DL_CHR20x8x2 | DL_LMS
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.word screen_memory
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.byte DL_CHR40x8x1
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.byte DL_JVB
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.word display_list
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screen_memory:
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; first text line: 20 bytes
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scrcode " HeLlO wOrLd! "
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; second text line, 40 bytes
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.byte 0, 0, 0, 0, 0, 0, 0, 0,70,71,70,71,70,71,70,71,70,71,70,71
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.byte 70,71,70,71,70,71,70,71,70,71,70,71, 0, 0, 0, 0, 0, 0, 0, 0
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; We write directly to the display list pointer
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.segment "SDLST"
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.word display_list
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; And we load our main program
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.code
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.proc start
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; Jump forever
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jmp start
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.endproc
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