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Latest versions of startup code and config by Karri Kaksonen. Citing: The new
header contains an encrypted loader, a small directory structure and a single pixel black title screen. This is directly bootable on a real Lynx. git-svn-id: svn://svn.cc65.org/cc65/trunk@4890 b7a2c559-68d2-44c3-8de9-860c34a00d81
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@ -33,9 +33,8 @@ information.
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<sect>Binary format<p>
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The standard binary output format generated by the linker for the Lynx target
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is a machine language program with an executable header. It is of course
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possible to change this behaviour by using a modified startup file and linker
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config.
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is a cart image. It is of course possible to change this behaviour by using a
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modified startup file and linker config.
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You can also produce real carts with directory structures and encrypted
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headers by modifying the startup and linker config files. There is a simple
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@ -26,21 +26,115 @@
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.import __BSS_LOAD__
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.import __INTERRUPTOR_COUNT__
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.import __RAM_START__, __RAM_SIZE__, __STACKSIZE__
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.import __BSS_SIZE__
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.include "zeropage.inc"
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.include "extzp.inc"
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; ------------------------------------------------------------------------
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; EXE header (BLL header)
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; EXE header
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__BLOCKSIZE__=1024
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.segment "EXEHDR"
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.word $0880
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.dbyt __RAM_START__
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.dbyt __BSS_LOAD__ - __RAM_START__ + 10
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.byte $42,$53
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.byte $39,$33
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.byte 'L','Y','N','X' ; magic
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.word __BLOCKSIZE__ ; bank 0 page size
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.word __BLOCKSIZE__ ; bank 1 page size
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.word 1 ; version number
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.asciiz "Cart name " ; 32 bytes cart name
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.asciiz "Manufacturer " ; 16 bytes manufacturer
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.byte 0 ; rotation 1=left
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; rotation 2=right
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.byte 0,0,0,0,0 ; spare
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__LOADER_SIZE__=410
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; The cart starts with an encrypted loader for 1024 bytes/block
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; images. The size of the loader is 410 bytes followed by two
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; mandatory directory entries.
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.byte $FD,$C1,$0D,$8E,$E9,$EE,$09,$13,$E5,$96
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.byte $0C,$34,$64,$DA,$D4,$BB,$99,$EC,$CE,$4F
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.byte $AA,$8C,$ED,$65,$F0,$32,$70,$A3,$84,$C4
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.byte $FC,$A2,$6D,$3A,$F8,$77,$4B,$AC,$9B,$54
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.byte $7D,$82,$6F,$F8,$A5,$06,$4D,$7B,$77,$55
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.byte $E4,$31,$C4,$2C,$2F,$2F,$B6,$4D,$15,$A9
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.byte $C7,$99,$5D,$6E,$B3,$97,$92,$44,$7B,$2B
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.byte $85,$18,$E6,$F1,$96,$F4,$C4,$DE,$A4,$CF
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.byte $79,$E2,$C1,$1A,$E0,$0C,$93,$C5,$26,$BD
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.byte $A3,$16,$8A,$C3,$59,$A0,$39,$38,$A0,$3B
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.byte $EF,$BB,$1D,$5C,$0D,$1D,$CC,$48,$1D,$DD
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.byte $98,$9A,$7A,$F7,$96,$F9,$61,$03,$50,$DA
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.byte $47,$69,$94,$C3,$80,$DA,$A9,$99,$A1,$21
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.byte $2B,$2E,$7D,$F5,$E4,$F7,$B3,$5C,$A8,$14
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.byte $FA,$E9,$06,$AC,$1E,$9F,$B5,$31,$BE,$42
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.byte $14,$08,$0E,$05,$FB,$25,$BB,$5C,$5C,$66
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.byte $76,$8E,$36,$E8,$EB,$39,$F2,$26,$BD,$17
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.byte $29,$F4,$B8,$1D,$7E,$EE,$47,$61,$BB,$9E
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.byte $F5,$72,$C9,$BC,$26,$37,$D5,$78,$8F,$D0
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.byte $CE,$95,$21,$EB,$4A,$07,$8D,$3A,$3A,$01
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.byte $82,$CF,$01,$C5,$1E,$1D,$A8,$41,$4F,$BD
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.byte $C1,$76,$22,$A3,$88,$D9,$57,$C9,$51,$3A
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.byte $26,$BE,$4A,$1A,$7F,$42,$61,$CF,$FC,$FC
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.byte $5B,$06,$94,$D2,$2C,$78,$45,$BA,$93,$C4
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.byte $7D,$7C,$81,$73,$07,$4F,$E2,$6C,$E9,$81
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.byte $1A,$DE,$77,$74,$87,$DE,$26,$9E,$7A,$A8
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.byte $19,$A7,$34,$32,$70,$ED,$59,$A8,$4A,$D8
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.byte $FE,$CB,$DD,$02,$2F,$CE,$92,$E9,$13,$A6
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.byte $FF,$B4,$4B,$18,$9D,$63,$48,$E0,$3B,$3B
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.byte $0D,$2B,$FC,$04,$A4,$E3,$5E,$4C,$3C,$94
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.byte $70,$C4,$F0,$64,$15,$48,$68,$17,$DE,$14
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.byte $72,$F0,$59,$33,$4C,$49,$47,$8D,$B6,$F4
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.byte $82,$4E,$B7,$4E,$01,$C9,$C2,$82,$0B,$7A
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.byte $AC,$67,$9B,$0F,$04,$E1,$B6,$78,$34,$C8
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.byte $4F,$2A,$11,$ED,$D0,$1C,$6D,$CD,$3D,$47
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.byte $09,$8B,$E5,$38,$19,$7A,$31,$6E,$30,$71
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.byte $1C,$90,$34,$E5,$44,$CC,$00,$C7,$41,$D0
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.byte $27,$8A,$06,$29,$5C,$2B,$E4,$26,$63,$09
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.byte $52,$D3,$97,$33,$D7,$59,$1C,$36,$2F,$C9
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.byte $A9,$A2,$B5,$BB,$A9,$1D,$E6,$36,$7E,$56
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.byte $05,$A4,$9C,$E0,$45,$59,$21,$E1,$E6,$21
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; The directory structure required by the 410 byte bootloader
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__DIRECTORY_START__:
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; Entry 0 - title sprite (mandatory)
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off0=__LOADER_SIZE__+(__DIRECTORY_END__-__DIRECTORY_START__)
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blocka=off0/__BLOCKSIZE__
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len0=(__TITLE_END__-__TITLE_START__)
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.byte <blocka
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.word off0 & (__BLOCKSIZE__ - 1)
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.byte $00
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.word __TITLE_START__
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.word len0
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; Entry 1 - first executable (mandatory)
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off1=off0+len0
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block1=off1/__BLOCKSIZE__
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len1=__RAM_SIZE__-__BSS_SIZE__
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.byte <block1
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.word off1 & (__BLOCKSIZE__ - 1)
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.byte $88
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.word __RAM_START__
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.word len1
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__DIRECTORY_END__:
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.org $b000
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__TITLE_START__:
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; The palette for the title sprite. Complete black.
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.byte $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
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.byte $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
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; The title sprite
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cls_sprite:
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.byte %00000001 ; A pixel sprite
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.byte %00010000
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.byte %00100000
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.addr 0,pixel_bitmap
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.word 0
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.word 0
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.word $a000 ; 160
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.word $6600 ; 102
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.byte $00
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pixel_bitmap:
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.byte 3,%10000100,%00000000, $0 ; A pixel bitmap
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__TITLE_END__:
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.reloc
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; ------------------------------------------------------------------------
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; Mikey and Suzy init data, reg offsets and data
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@ -3,7 +3,7 @@ SYMBOLS {
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}
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MEMORY {
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ZP: file = "", define = yes, start = $0000, size = $0100;
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HEADER: file = %O, start = $0000, size = $000A;
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HEADER: file = %O, start = $0000, size = $021e;
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RAM: file = %O, define = yes, start = $0400, size = $BC38 - __STACKSIZE__;
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}
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SEGMENTS {
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