; -------------------------------------------------------------------
; this file is intended to be assembled with ACME.
; It has not been tested with any other assemblers or linkers.
; -------------------------------------------------------------------
; -------------------------------------------------------------------
; example usage of the standard decruncher
; this program decrunches data to memory
; -------------------------------------------------------------------
; if decrunching forwards then the following line must be uncommented.
;DECRUNCH_FORWARDS = 1
!ifndef DECRUNCH_FORWARDS {
DECRUNCH_FORWARDS = 0
}
; -------------------------------------------------------------------
* = $0801
        !byte $0b,$08,<2019,>2019,$9e,$32,$30,$36,$31,0,0,0
; -------------------------------------------------------------------
; we begin here
; -------------------------------------------------------------------
!if DECRUNCH_FORWARDS = 0 {
        lda $04
        sta _byte_lo
        lda $05
        sta _byte_hi
} else {
        lda $02
        sta _byte_lo
        lda $03
        sta _byte_hi
}
        jmp exod_decrunch
; -------------------------------------------------------------------
exod_get_crunched_byte:
!if DECRUNCH_FORWARDS = 0 {
        lda _byte_lo
        bne _byte_skip_hi
        dec _byte_hi
_byte_skip_hi:
        dec _byte_lo
}
_byte_lo = * + 1
_byte_hi = * + 2
        lda $ffff               ; needs to be set correctly before
!if DECRUNCH_FORWARDS != 0 {
        inc _byte_lo
        bne _byte_skip_hi
        inc _byte_hi
_byte_skip_hi:
}
        rts                     ; decrunch_file is called.
; end_of_data needs to point to the address just after the address
; of the last byte of crunched data.
; -------------------------------------------------------------------
        !source "exodecrunch.asm"