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Shring the bootloader by 20 bytes and remove restrictions on file size
git-svn-id: svn://svn.cc65.org/cc65/trunk@5824 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
karri
parent
574c8fa273
commit
2222df9143
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@ -23,7 +23,7 @@
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; .org $0200
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;
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; ; 1. force Mikey to be in memory
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; stz MAPCTL
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; stz MAPCTL
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;
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; ; 3. set ComLynx to open collector
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; lda #4 ; a = 00000100
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@ -35,7 +35,7 @@
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;
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; ; 5. read in secondary exe + 8 bytes from the cart and store it in $f000
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; ldx #0 ; x = 0
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; ldy #$AB ; y = secondary loader size (171 bytes)
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; ldy #$97 ; y = secondary loader size (151 bytes)
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;rloop1: lda RCART0 ; read a byte from the cart
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; sta EXE,X ; EXE[X] = a
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; inx ; x++
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@ -49,13 +49,13 @@
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;**********************************
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; After compilation, encryption and obfuscation it turns into this.
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;**********************************
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.byte $ff, $dc, $e3, $bd, $bc, $7f, $f8, $94
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.byte $b7, $dd, $68, $bb, $da, $5b, $50, $5c
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.byte $ea, $9f, $2b, $df, $96, $80, $3f, $7e
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.byte $ef, $15, $81, $ae, $ad, $e4, $6e, $b3
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.byte $46, $d7, $72, $58, $f7, $76, $8a, $4a
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.byte $c7, $99, $bd, $ff, $02, $3e, $5b, $3f
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.byte $0c, $49, $1b, $22
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.byte $ff, $30, $73, $35, $4a, $a8, $54, $ef
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.byte $54, $20, $f5, $38, $f4, $35, $7e, $31
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.byte $7a, $c3, $f6, $eb, $ee, $30, $e3, $e5
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.byte $81, $91, $85, $bf, $4b, $d9, $cf, $80
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.byte $5f, $54, $36, $b5, $8a, $b0, $50, $d6
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.byte $38, $22, $3e, $c1, $01, $a6, $dd, $f5
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.byte $4b, $5e, $6b, $21
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;**********************************
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; Now we have the secondary loader
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@ -76,20 +76,12 @@ rloop: lda RCART0 ; read a byte from the cart
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jsr seclynxblock
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; 3. Skip over the block offset
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lda _FileBlockOffset+1
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eor #$FF
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tay
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lda _FileBlockOffset
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ldx _FileBlockOffset+1
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phx ; The BLL kit uses negative offsets
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plx ; while the basic Lynx uses positive
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bmi @1 ; Make all offsets negative
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eor #$FF
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pha
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txa
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eor #$FF
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bra @2
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@1: pha
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txa
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@2: tay
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plx
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tax
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jsr seclynxskip0
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; 4. Read in the main exe to RAM
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@ -97,20 +89,12 @@ rloop: lda RCART0 ; read a byte from the cart
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ldx _FileDestAddr+1
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sta _FileDestPtr
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stx _FileDestPtr+1
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lda _FileFileLen+1
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eor #$FF
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tay
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lda _FileFileLen
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ldx _FileFileLen+1
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phx ; The BLL kit uses negative counts
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plx ; while the basic Lynx uses positive
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bmi @3 ; make all counts negative
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eor #$FF
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pha
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txa
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eor #$FF
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bra @4
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@3: pha
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txa
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@4: tay
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plx
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tax
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jsr seclynxread0
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; 5. Jump to start of the main exe code
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@ -190,5 +174,6 @@ seclynxblock:
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pla
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exit: rts
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.reloc
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@ -122,20 +122,12 @@ flagsok:
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lda _FileStartBlock
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sta _FileCurrBlock
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jsr lynxblock
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lda _FileBlockOffset+1
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eor #$FF
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tay
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lda _FileBlockOffset
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ldx _FileBlockOffset+1
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phx ; The BLL kit uses negative offsets
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plx ; while tha basic Lynx uses positive
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bmi @1 ; Make all offsets negative
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eor #$FF
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pha
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txa
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eor #$FF
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bra @2
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@1: pha
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txa
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@2: tay
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plx
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tax
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jsr lynxskip0
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jsr stax0sp
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jmp incsp8
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@ -8,8 +8,7 @@
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; reads bytes from a raw cart and does not understand the concept of files.
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; So if you read over the end of file you get data from the next file.
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;
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; The count-parameter can be positive (Atari style) or negative (BLL style).
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; In any case the read routine will work correctly.
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; The count-parameter is positive (Atari style).
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;
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; int __fastcall__ read(int fd,void *buf,int count)
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;
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@ -30,18 +29,13 @@
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sta _FileDestPtr
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stx _FileDestPtr+1
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jsr ldax0sp
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phx ; The BLL kit uses negative counts
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plx ; while the basic Lynx uses positive
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bmi @1 ; make all counts negative
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eor #$FF
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pha
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txa
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txa
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eor #$FF
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bra @2
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@1: pha
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txa
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@2: tay
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plx
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tay
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pla
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eor #$FF
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tax
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jsr lynxread0
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jsr ldax0sp
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jmp incsp6
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@ -1,6 +1,6 @@
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SYMBOLS {
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__STACKSIZE__: type = weak, value = $0800; # 2k stack
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__STARTOFDIRECTORY__: type = weak, value = $00DF; # start just after loader
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__STARTOFDIRECTORY__: type = weak, value = $00CB; # start just after loader
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__BLOCKSIZE__: type = weak, value = 1024; # cart block size
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__BLLHDR__: type = import;
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}
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@ -1,6 +1,6 @@
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SYMBOLS {
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__STACKSIZE__: type = weak, value = $0800; # 2k stack
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__STARTOFDIRECTORY__: type = weak, value = $00DF; # start just after loader
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__STARTOFDIRECTORY__: type = weak, value = $00CB; # start just after loader
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__BLOCKSIZE__: type = weak, value = 1024; # cart block size
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__EXEHDR__: type = import;
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__BOOTLDR__: type = import;
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@ -1,6 +1,6 @@
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SYMBOLS {
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__STACKSIZE__: type = weak, value = $0800; # 2k stack
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__STARTOFDIRECTORY__: type = weak, value = $00DF; # start just after loader
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__STARTOFDIRECTORY__: type = weak, value = $00CB; # start just after loader
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__BLOCKSIZE__: type = weak, value = 1024; # cart block size
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__EXEHDR__: type = import;
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__BOOTLDR__: type = import;
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@ -1,6 +1,6 @@
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SYMBOLS {
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__STACKSIZE__: type = weak, value = $0800; # 2k stack
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__STARTOFDIRECTORY__: type = weak, value = $00DF; # start just after loader
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__STARTOFDIRECTORY__: type = weak, value = $00CB; # start just after loader
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__BLOCKSIZE__: type = weak, value = 1024; # cart block size
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__EXEHDR__: type = import;
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__BOOTLDR__: type = import;
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