mirror of
https://github.com/cc65/cc65.git
synced 2024-12-28 06:30:16 +00:00
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
@ -35,7 +35,7 @@
|
||||
;
|
||||
; ; 5. read in secondary exe + 8 bytes from the cart and store it in $f000
|
||||
; ldx #0 ; x = 0
|
||||
; ldy #$AB ; y = secondary loader size (171 bytes)
|
||||
; ldy #$97 ; y = secondary loader size (151 bytes)
|
||||
;rloop1: lda RCART0 ; read a byte from the cart
|
||||
; sta EXE,X ; EXE[X] = a
|
||||
; inx ; x++
|
||||
@ -49,13 +49,13 @@
|
||||
;**********************************
|
||||
; After compilation, encryption and obfuscation it turns into this.
|
||||
;**********************************
|
||||
.byte $ff, $dc, $e3, $bd, $bc, $7f, $f8, $94
|
||||
.byte $b7, $dd, $68, $bb, $da, $5b, $50, $5c
|
||||
.byte $ea, $9f, $2b, $df, $96, $80, $3f, $7e
|
||||
.byte $ef, $15, $81, $ae, $ad, $e4, $6e, $b3
|
||||
.byte $46, $d7, $72, $58, $f7, $76, $8a, $4a
|
||||
.byte $c7, $99, $bd, $ff, $02, $3e, $5b, $3f
|
||||
.byte $0c, $49, $1b, $22
|
||||
.byte $ff, $30, $73, $35, $4a, $a8, $54, $ef
|
||||
.byte $54, $20, $f5, $38, $f4, $35, $7e, $31
|
||||
.byte $7a, $c3, $f6, $eb, $ee, $30, $e3, $e5
|
||||
.byte $81, $91, $85, $bf, $4b, $d9, $cf, $80
|
||||
.byte $5f, $54, $36, $b5, $8a, $b0, $50, $d6
|
||||
.byte $38, $22, $3e, $c1, $01, $a6, $dd, $f5
|
||||
.byte $4b, $5e, $6b, $21
|
||||
|
||||
;**********************************
|
||||
; Now we have the secondary loader
|
||||
@ -76,20 +76,12 @@ rloop: lda RCART0 ; read a byte from the cart
|
||||
jsr seclynxblock
|
||||
|
||||
; 3. Skip over the block offset
|
||||
lda _FileBlockOffset+1
|
||||
eor #$FF
|
||||
tay
|
||||
lda _FileBlockOffset
|
||||
ldx _FileBlockOffset+1
|
||||
phx ; The BLL kit uses negative offsets
|
||||
plx ; while the basic Lynx uses positive
|
||||
bmi @1 ; Make all offsets negative
|
||||
eor #$FF
|
||||
pha
|
||||
txa
|
||||
eor #$FF
|
||||
bra @2
|
||||
@1: pha
|
||||
txa
|
||||
@2: tay
|
||||
plx
|
||||
tax
|
||||
jsr seclynxskip0
|
||||
|
||||
; 4. Read in the main exe to RAM
|
||||
@ -97,20 +89,12 @@ rloop: lda RCART0 ; read a byte from the cart
|
||||
ldx _FileDestAddr+1
|
||||
sta _FileDestPtr
|
||||
stx _FileDestPtr+1
|
||||
lda _FileFileLen+1
|
||||
eor #$FF
|
||||
tay
|
||||
lda _FileFileLen
|
||||
ldx _FileFileLen+1
|
||||
phx ; The BLL kit uses negative counts
|
||||
plx ; while the basic Lynx uses positive
|
||||
bmi @3 ; make all counts negative
|
||||
eor #$FF
|
||||
pha
|
||||
txa
|
||||
eor #$FF
|
||||
bra @4
|
||||
@3: pha
|
||||
txa
|
||||
@4: tay
|
||||
plx
|
||||
tax
|
||||
jsr seclynxread0
|
||||
|
||||
; 5. Jump to start of the main exe code
|
||||
@ -190,5 +174,6 @@ seclynxblock:
|
||||
pla
|
||||
|
||||
exit: rts
|
||||
|
||||
.reloc
|
||||
|
||||
|
||||
@ -122,20 +122,12 @@ flagsok:
|
||||
lda _FileStartBlock
|
||||
sta _FileCurrBlock
|
||||
jsr lynxblock
|
||||
lda _FileBlockOffset+1
|
||||
eor #$FF
|
||||
tay
|
||||
lda _FileBlockOffset
|
||||
ldx _FileBlockOffset+1
|
||||
phx ; The BLL kit uses negative offsets
|
||||
plx ; while tha basic Lynx uses positive
|
||||
bmi @1 ; Make all offsets negative
|
||||
eor #$FF
|
||||
pha
|
||||
txa
|
||||
eor #$FF
|
||||
bra @2
|
||||
@1: pha
|
||||
txa
|
||||
@2: tay
|
||||
plx
|
||||
tax
|
||||
jsr lynxskip0
|
||||
jsr stax0sp
|
||||
jmp incsp8
|
||||
|
||||
@ -8,8 +8,7 @@
|
||||
; reads bytes from a raw cart and does not understand the concept of files.
|
||||
; So if you read over the end of file you get data from the next file.
|
||||
;
|
||||
; The count-parameter can be positive (Atari style) or negative (BLL style).
|
||||
; In any case the read routine will work correctly.
|
||||
; The count-parameter is positive (Atari style).
|
||||
;
|
||||
; int __fastcall__ read(int fd,void *buf,int count)
|
||||
;
|
||||
@ -30,18 +29,13 @@
|
||||
sta _FileDestPtr
|
||||
stx _FileDestPtr+1
|
||||
jsr ldax0sp
|
||||
phx ; The BLL kit uses negative counts
|
||||
plx ; while the basic Lynx uses positive
|
||||
bmi @1 ; make all counts negative
|
||||
eor #$FF
|
||||
pha
|
||||
txa
|
||||
eor #$FF
|
||||
bra @2
|
||||
@1: pha
|
||||
txa
|
||||
@2: tay
|
||||
plx
|
||||
tay
|
||||
pla
|
||||
eor #$FF
|
||||
tax
|
||||
jsr lynxread0
|
||||
jsr ldax0sp
|
||||
jmp incsp6
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
SYMBOLS {
|
||||
__STACKSIZE__: type = weak, value = $0800; # 2k stack
|
||||
__STARTOFDIRECTORY__: type = weak, value = $00DF; # start just after loader
|
||||
__STARTOFDIRECTORY__: type = weak, value = $00CB; # start just after loader
|
||||
__BLOCKSIZE__: type = weak, value = 1024; # cart block size
|
||||
__BLLHDR__: type = import;
|
||||
}
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
SYMBOLS {
|
||||
__STACKSIZE__: type = weak, value = $0800; # 2k stack
|
||||
__STARTOFDIRECTORY__: type = weak, value = $00DF; # start just after loader
|
||||
__STARTOFDIRECTORY__: type = weak, value = $00CB; # start just after loader
|
||||
__BLOCKSIZE__: type = weak, value = 1024; # cart block size
|
||||
__EXEHDR__: type = import;
|
||||
__BOOTLDR__: type = import;
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
SYMBOLS {
|
||||
__STACKSIZE__: type = weak, value = $0800; # 2k stack
|
||||
__STARTOFDIRECTORY__: type = weak, value = $00DF; # start just after loader
|
||||
__STARTOFDIRECTORY__: type = weak, value = $00CB; # start just after loader
|
||||
__BLOCKSIZE__: type = weak, value = 1024; # cart block size
|
||||
__EXEHDR__: type = import;
|
||||
__BOOTLDR__: type = import;
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
SYMBOLS {
|
||||
__STACKSIZE__: type = weak, value = $0800; # 2k stack
|
||||
__STARTOFDIRECTORY__: type = weak, value = $00DF; # start just after loader
|
||||
__STARTOFDIRECTORY__: type = weak, value = $00CB; # start just after loader
|
||||
__BLOCKSIZE__: type = weak, value = 1024; # cart block size
|
||||
__EXEHDR__: type = import;
|
||||
__BOOTLDR__: type = import;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user