From f11067e2603d98b1475da308308e3a255dbe072f Mon Sep 17 00:00:00 2001 From: uz Date: Wed, 22 Dec 2010 15:37:20 +0000 Subject: [PATCH] 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 --- doc/lynx.sgml | 5 +- libsrc/lynx/crt0.s | 110 +++++++++++++++++++++++++++++++++++++++--- src/ld65/cfg/lynx.cfg | 2 +- 3 files changed, 105 insertions(+), 12 deletions(-) diff --git a/doc/lynx.sgml b/doc/lynx.sgml index 856b909ec..a8c2525c2 100644 --- a/doc/lynx.sgml +++ b/doc/lynx.sgml @@ -33,9 +33,8 @@ information. Binary format

The standard binary output format generated by the linker for the Lynx target -is a machine language program with an executable header. It is of course -possible to change this behaviour by using a modified startup file and linker -config. +is a cart image. It is of course possible to change this behaviour by using a +modified startup file and linker config. You can also produce real carts with directory structures and encrypted headers by modifying the startup and linker config files. There is a simple diff --git a/libsrc/lynx/crt0.s b/libsrc/lynx/crt0.s index 397d85bb3..7cf823c90 100644 --- a/libsrc/lynx/crt0.s +++ b/libsrc/lynx/crt0.s @@ -26,21 +26,115 @@ .import __BSS_LOAD__ .import __INTERRUPTOR_COUNT__ .import __RAM_START__, __RAM_SIZE__, __STACKSIZE__ + .import __BSS_SIZE__ .include "zeropage.inc" .include "extzp.inc" ; ------------------------------------------------------------------------ -; EXE header (BLL header) - +; EXE header +__BLOCKSIZE__=1024 .segment "EXEHDR" - .word $0880 - .dbyt __RAM_START__ - .dbyt __BSS_LOAD__ - __RAM_START__ + 10 - .byte $42,$53 - .byte $39,$33 - + .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