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79 lines
2.7 KiB
ArmAsm
79 lines
2.7 KiB
ArmAsm
; Maciej 'YTM/Elysium' Witkowiak
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; 06.06.2002
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; This is the source for the main VLIR-structured program part
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; include some GEOS defines
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.include "../../libsrc/geos/inc/const.inc"
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.include "../../libsrc/geos/inc/jumptab.inc"
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.include "../../libsrc/geos/inc/geossym.inc"
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.include "../../libsrc/geos/inc/geosmac.inc"
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; import load addresses for all VLIR chains
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; these labels are defined upon linking with ld65
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.import __OVERLAYADDR__
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.import __OVERLAYSIZE__
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; import names of functions defined (and exported) in each VLIR part
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; of your application
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; here I used an OVERLAYx_ prefix to prevent name clashes
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.import OVERLAY1_Function1
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.import OVERLAY2_Function1
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; segments "STARTUP", "CODE", "DATA", "RODATA" and "BSS" all go to VLIR0 chain
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.segment "STARTUP"
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; code segment for VLIR 0 chain
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ProgExec:
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LoadW r0, paramString ; show something
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jsr DoDlgBox
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MoveW dirEntryBuf+OFF_DE_TR_SC, r1
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LoadW r4, fileHeader
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jsr GetBlock ; load back VLIR t&s table
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bnex error
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lda #1
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jsr PointRecord ; we want next module (#1)
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LoadW r2, __OVERLAYSIZE__ ; length - as many bytes as we have room for
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LoadW r7, __OVERLAYADDR__ ; all VLIR segments have the same load address
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jsr ReadRecord ; load it
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bnex error
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jsr OVERLAY1_Function1 ; execute something
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lda #2
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jsr PointRecord ; next module
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LoadW r2, __OVERLAYSIZE__
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LoadW r7, __OVERLAYADDR__
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jsr ReadRecord ; load it
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bnex error
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jsr OVERLAY2_Function1 ; execute something
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error: jmp EnterDeskTop ; end of application
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.segment "RODATA"
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; read-only data segment
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paramString:
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.byte DEF_DB_POS | 1
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.byte DBTXTSTR, TXT_LN_X, TXT_LN_2_Y
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.word line1
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.byte DBTXTSTR, TXT_LN_X, TXT_LN_3_Y
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.word line2
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.byte OK, DBI_X_0, DBI_Y_2
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.byte NULL
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line1: .byte BOLDON, "Hello World!",0
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line2: .byte OUTLINEON,"Hello",PLAINTEXT," world!",0
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.segment "DATA"
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; read/write initialized data segment
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counter: .word 0
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.segment "BSS"
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; read/write uninitialized data segment
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; this space doesn't go into output file, only its size and
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; position is remembered
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