X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=libsrc%2Flynx%2Fcrt0.s;h=116b39f76a26b11b229642a91b1d13281ad19062;hb=f16516047a551319c82debd339ded8bc2b587212;hp=7cf823c90cda8bca0d0693a3069ebf42bc7e638a;hpb=f11067e2603d98b1475da308308e3a255dbe072f;p=cc65

diff --git a/libsrc/lynx/crt0.s b/libsrc/lynx/crt0.s
index 7cf823c90..116b39f76 100644
--- a/libsrc/lynx/crt0.s
+++ b/libsrc/lynx/crt0.s
@@ -15,131 +15,23 @@
 ; on the front of the fully linked binary (see EXEHDR segment.)
 ;
 
-	.include        "lynx.inc"
-	.export         _exit
+        .export         _exit
         .export         __STARTUP__ : absolute = 1      ; Mark as startup
 
-	.import         callirq, initlib, donelib
-	.import         zerobss
-	.import	     	callmain
-	.import         _main
-	.import         __BSS_LOAD__
-	.import	       	__INTERRUPTOR_COUNT__
-	.import         __RAM_START__, __RAM_SIZE__, __STACKSIZE__
-	.import         __BSS_SIZE__
+        .import         initlib, donelib
+        .import         zerobss
+        .import         callmain
+        .import         _main
+        .import         __RAM_START__, __RAM_SIZE__, __STACKSIZE__
 
-	.include        "zeropage.inc"
+        .include        "zeropage.inc"
         .include        "extzp.inc"
-
-
-; ------------------------------------------------------------------------
-; EXE header
-__BLOCKSIZE__=1024
-	.segment "EXEHDR"
-	.byte	'L','Y','N','X'				; magic
-	.word	__BLOCKSIZE__				; bank 0 page size
-	.word	__BLOCKSIZE__				; bank 1 page size
-	.word	1					; version number
-	.asciiz	"Cart name                      "	; 32 bytes cart name
-	.asciiz	"Manufacturer   "			; 16 bytes manufacturer
-	.byte	0					; rotation 1=left
-							; rotation 2=right
-	.byte	0,0,0,0,0				; spare
-
-__LOADER_SIZE__=410
-
-	; The cart starts with an encrypted loader for 1024 bytes/block
-	; images. The size of the loader is 410 bytes followed by two
-	; mandatory directory entries.
-	.byte	$FD,$C1,$0D,$8E,$E9,$EE,$09,$13,$E5,$96
-	.byte	$0C,$34,$64,$DA,$D4,$BB,$99,$EC,$CE,$4F
-	.byte	$AA,$8C,$ED,$65,$F0,$32,$70,$A3,$84,$C4
-	.byte	$FC,$A2,$6D,$3A,$F8,$77,$4B,$AC,$9B,$54
-	.byte	$7D,$82,$6F,$F8,$A5,$06,$4D,$7B,$77,$55
-	.byte	$E4,$31,$C4,$2C,$2F,$2F,$B6,$4D,$15,$A9
-	.byte	$C7,$99,$5D,$6E,$B3,$97,$92,$44,$7B,$2B
-	.byte	$85,$18,$E6,$F1,$96,$F4,$C4,$DE,$A4,$CF
-	.byte	$79,$E2,$C1,$1A,$E0,$0C,$93,$C5,$26,$BD
-	.byte	$A3,$16,$8A,$C3,$59,$A0,$39,$38,$A0,$3B
-	.byte	$EF,$BB,$1D,$5C,$0D,$1D,$CC,$48,$1D,$DD
-	.byte	$98,$9A,$7A,$F7,$96,$F9,$61,$03,$50,$DA
-	.byte	$47,$69,$94,$C3,$80,$DA,$A9,$99,$A1,$21
-	.byte	$2B,$2E,$7D,$F5,$E4,$F7,$B3,$5C,$A8,$14
-	.byte	$FA,$E9,$06,$AC,$1E,$9F,$B5,$31,$BE,$42
-	.byte	$14,$08,$0E,$05,$FB,$25,$BB,$5C,$5C,$66
-	.byte	$76,$8E,$36,$E8,$EB,$39,$F2,$26,$BD,$17
-	.byte	$29,$F4,$B8,$1D,$7E,$EE,$47,$61,$BB,$9E
-	.byte	$F5,$72,$C9,$BC,$26,$37,$D5,$78,$8F,$D0
-	.byte	$CE,$95,$21,$EB,$4A,$07,$8D,$3A,$3A,$01
-	.byte	$82,$CF,$01,$C5,$1E,$1D,$A8,$41,$4F,$BD
-	.byte	$C1,$76,$22,$A3,$88,$D9,$57,$C9,$51,$3A
-	.byte	$26,$BE,$4A,$1A,$7F,$42,$61,$CF,$FC,$FC
-	.byte	$5B,$06,$94,$D2,$2C,$78,$45,$BA,$93,$C4
-	.byte	$7D,$7C,$81,$73,$07,$4F,$E2,$6C,$E9,$81
-	.byte	$1A,$DE,$77,$74,$87,$DE,$26,$9E,$7A,$A8
-	.byte	$19,$A7,$34,$32,$70,$ED,$59,$A8,$4A,$D8
-	.byte	$FE,$CB,$DD,$02,$2F,$CE,$92,$E9,$13,$A6
-	.byte	$FF,$B4,$4B,$18,$9D,$63,$48,$E0,$3B,$3B
-	.byte	$0D,$2B,$FC,$04,$A4,$E3,$5E,$4C,$3C,$94
-	.byte	$70,$C4,$F0,$64,$15,$48,$68,$17,$DE,$14
-	.byte	$72,$F0,$59,$33,$4C,$49,$47,$8D,$B6,$F4
-	.byte	$82,$4E,$B7,$4E,$01,$C9,$C2,$82,$0B,$7A
-	.byte	$AC,$67,$9B,$0F,$04,$E1,$B6,$78,$34,$C8
-	.byte	$4F,$2A,$11,$ED,$D0,$1C,$6D,$CD,$3D,$47
-	.byte	$09,$8B,$E5,$38,$19,$7A,$31,$6E,$30,$71
-	.byte	$1C,$90,$34,$E5,$44,$CC,$00,$C7,$41,$D0
-	.byte	$27,$8A,$06,$29,$5C,$2B,$E4,$26,$63,$09
-	.byte	$52,$D3,$97,$33,$D7,$59,$1C,$36,$2F,$C9
-	.byte	$A9,$A2,$B5,$BB,$A9,$1D,$E6,$36,$7E,$56
-	.byte	$05,$A4,$9C,$E0,$45,$59,$21,$E1,$E6,$21
-
-	; The directory structure required by the 410 byte bootloader
-__DIRECTORY_START__:
-; Entry 0 - title sprite (mandatory)
-off0=__LOADER_SIZE__+(__DIRECTORY_END__-__DIRECTORY_START__)
-blocka=off0/__BLOCKSIZE__
-len0=(__TITLE_END__-__TITLE_START__)
-        .byte   <blocka
-        .word   off0 & (__BLOCKSIZE__ - 1)
-        .byte   $00
-        .word   __TITLE_START__
-        .word   len0
-
-; Entry 1 - first executable (mandatory)
-off1=off0+len0
-block1=off1/__BLOCKSIZE__
-len1=__RAM_SIZE__-__BSS_SIZE__
-        .byte   <block1
-        .word   off1 & (__BLOCKSIZE__ - 1)
-        .byte   $88
-        .word   __RAM_START__
-        .word   len1
-__DIRECTORY_END__:
-	.org $b000
-__TITLE_START__:
-	; The palette for the title sprite. Complete black.
-	.byte $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
-        .byte $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
-	; The title sprite
-cls_sprite:
-        .byte   %00000001			; A pixel sprite
-       	.byte   %00010000
-       	.byte   %00100000
-       	.addr   0,pixel_bitmap
-       	.word   0
-       	.word   0
-       	.word   $a000  	                        ; 160
-       	.word   $6600	                        ; 102
-       	.byte   $00
-pixel_bitmap:
-        .byte   3,%10000100,%00000000, $0       ; A pixel bitmap
-__TITLE_END__:
-	.reloc
+        .include        "lynx.inc"
 
 ; ------------------------------------------------------------------------
 ; Mikey and Suzy init data, reg offsets and data
 
-	.rodata
+        .rodata
 
 SuzyInitReg:    .byte $28,$2a,$04,$06,$92,$83,$90
 SuzyInitData:   .byte $7f,$7f,$00,$00,$24,$f3,$01
@@ -147,101 +39,89 @@ SuzyInitData:   .byte $7f,$7f,$00,$00,$24,$f3,$01
 MikeyInitReg:   .byte $00,$01,$08,$09,$20,$28,$30,$38,$44,$50,$8a,$8b,$8c,$92,$93
 MikeyInitData:  .byte $9e,$18,$68,$1f,$00,$00,$00,$00,$00,$ff,$1a,$1b,$04,$0d,$29
 
-
 ; ------------------------------------------------------------------------
 ; Actual code
 
-	.segment "STARTUP"
+        .segment "STARTUP"
 
 ; set up system
 
-	sei
-	cld
-	ldx     #$FF
-	txs
+        sei
+        cld
+        ldx     #$FF
+        txs
 
 ; init bank switching
 
-       	lda     #$C
-       	sta     MAPCTL                  ; $FFF9
+        lda     #$C
+        sta     MAPCTL          ; $FFF9
 
 ; disable all timer interrupts
 
-       	lda     #$80
-       	trb     TIM0CTLA
-       	trb     TIM1CTLA
-       	trb     TIM2CTLA
-       	trb     TIM3CTLA
-       	trb     TIM5CTLA
-       	trb     TIM6CTLA
-       	trb     TIM7CTLA
+        lda     #$80
+        trb     TIM0CTLA
+        trb     TIM1CTLA
+        trb     TIM2CTLA
+        trb     TIM3CTLA
+        trb     TIM5CTLA
+        trb     TIM6CTLA
+        trb     TIM7CTLA
 
 ; disable TX/RX IRQ, set to 8E1
 
-       	lda     #%11101
-       	sta     SERCTL
+        lda     #%11101
+        sta     SERCTL
 
 ; clear all pending interrupts
 
-       	lda     INTSET
-       	sta     INTRST
+        lda     INTSET
+        sta     INTRST
 
 ; setup the stack
 
-	lda     #<(__RAM_START__ + __RAM_SIZE__ + __STACKSIZE__)
-	sta     sp
-	lda     #>(__RAM_START__ + __RAM_SIZE__ + __STACKSIZE__)
-	sta     sp+1
+        lda     #<(__RAM_START__ + __RAM_SIZE__ + __STACKSIZE__)
+        sta     sp
+        lda     #>(__RAM_START__ + __RAM_SIZE__ + __STACKSIZE__)
+        sta     sp+1
 
 ; Init Mickey
 
-	ldx     #.sizeof(MikeyInitReg)-1
+        ldx     #.sizeof(MikeyInitReg)-1
 mloop:  ldy     MikeyInitReg,x
-	lda     MikeyInitData,x
-	sta     $fd00,y
-	dex
-	bpl     mloop
+        lda     MikeyInitData,x
+        sta     $fd00,y
+        dex
+        bpl     mloop
 
 ; these are RAM-shadows of read only regs
 
-	ldx     #$1b
-	stx     __iodat
-	dex                             ; $1A
-       	stx     __iodir
-	ldx     #$d
-	stx     __viddma
+        ldx     #$1b
+        stx     __iodat
+        dex                     ; $1A
+        stx     __iodir
+        ldx     #$d
+        stx     __viddma
 
 ; Init Suzy
 
-	ldx     #.sizeof(SuzyInitReg)-1
+        ldx     #.sizeof(SuzyInitReg)-1
 sloop:  ldy     SuzyInitReg,x
-	lda     SuzyInitData,x
-	sta     $fc00,y
-	dex
-	bpl     sloop
+        lda     SuzyInitData,x
+        sta     $fc00,y
+        dex
+        bpl     sloop
 
-	lda     #$24
-	sta     __sprsys
+        lda     #$24
+        sta     __sprsys
+        cli
 
 ; Clear the BSS data
 
-	jsr     zerobss
-
-; If we have IRQ functions, set the IRQ vector
-; as Lynx is a console there is not much point in releasing the IRQ
-
-        lda     #<__INTERRUPTOR_COUNT__
-      	beq	NoIRQ1
-      	lda	#<IRQStub
-      	ldx	#>IRQStub
-      	sei
-      	sta	INTVECTL
-      	stx	INTVECTH
-      	cli
+        jsr     zerobss
 
 ; Call module constructors
 
-NoIRQ1: jsr     initlib
+        jsr     initlib
 
 ; Push arguments and call main
 
@@ -254,19 +134,3 @@ _exit:  jsr     donelib         ; Run module destructors
 ; Endless loop
 
 noret:  bra     noret
-
-
-	.segment "CODE"
-IRQStub:
-	phy
-	phx
-	pha
-	cld
-       	jsr    	callirq
-	lda	INTSET
-	sta	INTRST
-	pla
-	plx
-	ply
-	rti
-