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65 lines
1.5 KiB
ArmAsm
65 lines
1.5 KiB
ArmAsm
;
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; This must be the *second* file on the linker command line
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; (.cvt header must be the *first* one)
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; Maciej 'YTM/Elysium' Witkowiak
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; 26.10.99, 10.3.2000, 15.8.2001, 23.12.2002
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.import __RAM_START__, __RAM_SIZE__ ; Linker generated
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.import initlib, donelib
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.import pushax
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.import _main
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.import _MainLoop, _EnterDeskTop
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.import zerobss
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.importzp sp
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.export _exit
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; ------------------------------------------------------------------------
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; Create an empty GEOSZP segment to avoid linker warnings
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.segment "GEOSZP", zeropage
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; ------------------------------------------------------------------------
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; Create an empty LOWCODE segment to avoid linker warnings
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.segment "LOWCODE"
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; ------------------------------------------------------------------------
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; Place the startup code in a special segment.
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.segment "STARTUP"
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; Clear the BSS data
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jsr zerobss
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; Setup stack
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lda #<(__RAM_START__ + __RAM_SIZE__)
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sta sp
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lda #>(__RAM_START__ + __RAM_SIZE__)
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sta sp+1 ; Set argument stack ptr
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; Call module constructors
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jsr initlib
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; Pass an empty command line
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lda #0
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tax
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jsr pushax ; argc
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jsr pushax ; argv
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cli
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ldy #4 ; Argument size
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jsr _main ; call the users code
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jmp _MainLoop ; jump to GEOS MainLoop
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; Call module destructors. This is also the _exit entry which must be called
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; explicitly by the code.
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_exit: jsr donelib ; Run module destructors
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jmp _EnterDeskTop ; return control to the system
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