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Added screen initialization on Apple GEOS.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@5568 b7a2c559-68d2-44c3-8de9-860c34a00d81
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ol.sc 2012-02-28 21:24:17 +00:00
parent 204aba1577
commit f6825b244a
1 changed files with 31 additions and 11 deletions
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42
libsrc/geos-common/system/crt0.s
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@ -5,43 +5,63 @@
; 26.10.99, 10.3.2000, 15.8.2001, 23.12.2002
.export _exit
.export __STARTUP__ : absolute = 1 ; Mark as startup
.export __STARTUP__ : absolute = 1 ; Mark as startup
.import __VLIR0_START__, __VLIR0_SIZE__ ; Linker generated
.import __STACKSIZE__ ; Linker generated
.import __STACKSIZE__, __BACKBUFSIZE__ ; Linker generated
.import initlib, donelib
.import callmain
.import zerobss
.importzp sp
.include "jumptab.inc"
.include "geossym.inc"
.include "const.inc"
; ------------------------------------------------------------------------
; Place the startup code in a special segment.
.segment "STARTUP"
; Clear the BSS data
; GEOS 64/128 initializes the screen before starting an application while
; Apple GEOS does not. In order to provide identical startup conditions
; we initialize the screen here on Apple GEOS. For the same reason we set
; the pattern and dispBufferOn even on GEOS 64/128 although we don't use
; them here.
lda #2 ; Checkerboard pattern
jsr SetPattern
lda #<(ST_WR_FORE | .MIN (ST_WR_BACK, __BACKBUFSIZE__))
sta dispBufferOn
.ifdef __GEOS_APPLE__
jsr i_Rectangle
.byte 0
.byte SC_PIX_HEIGHT-1
.word 0
.word SC_PIX_WIDTH-1
.endif
; Clear the BSS data.
jsr zerobss
; Setup stack
; Setup stack.
lda #<(__VLIR0_START__ + __VLIR0_SIZE__ + __STACKSIZE__)
ldx #>(__VLIR0_START__ + __VLIR0_SIZE__ + __STACKSIZE__)
sta sp
lda #>(__VLIR0_START__ + __VLIR0_SIZE__ + __STACKSIZE__)
sta sp+1 ; Set argument stack ptr
stx sp+1
; Call module constructors
; Call module constructors.
jsr initlib
; Push arguments and call main()
; Push arguments and call main().
cli
jsr callmain
jsr callmain
; Call module destructors.
_exit: jsr donelib ; Run module destructors
_exit: jsr donelib
jmp EnterDeskTop ; return control to the system
jmp EnterDeskTop ; Return control to the system