222 lines
6 KiB
NASM
222 lines
6 KiB
NASM
;Exomizer 3 Z80 decoder
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;Copyright (C) 2008-2018 by Jaime Tejedor Gomez (Metalbrain)
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;
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;Optimized by Antonio Villena and Urusergi
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;
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;Compression algorithm by Magnus Lind
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; exomizer raw -P13 -T0 -b (literals=1) (reuse=0)
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; exomizer raw -P13 -T1 -b (literals=0) (reuse=0)
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; exomizer raw -P45 -T0 -b (literals=1) (reuse=1)
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; exomizer raw -P45 -T1 -b (literals=0) (reuse=1)
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;
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; This depacker is free software; you can redistribute it and/or
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; modify it under the terms of the GNU Lesser General Public
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; License as published by the Free Software Foundation; either
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; version 2.1 of the License, or (at your option) any later version.
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;
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; This library is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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; Lesser General Public License for more details.
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;
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; You should have received a copy of the GNU Lesser General Public
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; License along with this library; if not, write to the Free Software
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; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;
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IF mapbase-mapbase/256*256<240 AND mapbase-mapbase/256*256>135
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ld iy, 256+mapbase/256*256
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ELSE
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ld iy, (mapbase+16)/256*256+112
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ENDIF
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ld a, 128
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ld b, 52
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push de
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cp a
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init ld c, 16
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jr nz, get4
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ld de, 1
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ld ixl, c
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get4 add a, a
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call z, getbit
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rl c
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jr nc, get4
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IF mapbase-mapbase/256*256<240 AND mapbase-mapbase/256*256>135
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ld (iy-256+mapbase-mapbase/256*256), c
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ELSE
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ld (iy-112+mapbase-(mapbase+16)/256*256), c
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ENDIF
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push hl
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ld hl, 1
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defb 210
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setbit add hl, hl
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dec c
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jr nz, setbit
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IF mapbase-mapbase/256*256<240 AND mapbase-mapbase/256*256>135
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ld (iy-204+mapbase-mapbase/256*256), e
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ld (iy-152+mapbase-mapbase/256*256), d
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ELSE
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ld (iy-60+mapbase-(mapbase+16)/256*256), e
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ld (iy-8+mapbase-(mapbase+16)/256*256), d
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ENDIF
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add hl, de
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ex de, hl
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inc iyl
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pop hl
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dec ixl
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djnz init
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IF reuse=1
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push iy
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pop ix
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IF mapbase-mapbase/256*256<240 AND mapbase-mapbase/256*256>135
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ld (ix-152+mapbase-mapbase/256*256), 1
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ELSE
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ld (ix-6+mapbase-(mapbase+16)/256*256), 1
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ENDIF
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scf
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ENDIF
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pop de
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litcop ldd
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mloo1
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IF reuse=1
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IF mapbase-mapbase/256*256<240 AND mapbase-mapbase/256*256>135
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rl (ix-152+mapbase-mapbase/256*256)
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ELSE
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rl (ix-6+mapbase-(mapbase+16)/256*256)
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ENDIF
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ENDIF
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mloop add a, a
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call z, getbit
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jr c, litcop
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IF mapbase-mapbase/256*256<240 AND mapbase-mapbase/256*256>135
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ld c, 256-1
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ELSE
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ld c, 112-1
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ENDIF
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getind add a, a
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call z, getbit
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inc c
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jr nc, getind
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IF mapbase-mapbase/256*256<240 AND mapbase-mapbase/256*256>135
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bit 4, c
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IF literals=1
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jr nz, litcat
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ELSE
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ret nz
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ENDIF
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ELSE
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IF literals=1
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jp m, litcat
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ELSE
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ret m
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ENDIF
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ENDIF
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push de
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ld iyl, c
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call getpair
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IF reuse=1
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IF mapbase-mapbase/256*256<240 AND mapbase-mapbase/256*256>135
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rl (ix-152+mapbase-mapbase/256*256)
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ELSE
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rl (ix-6+mapbase-(mapbase+16)/256*256)
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ENDIF
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ENDIF
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push de
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IF mapbase-mapbase/256*256<240 AND mapbase-mapbase/256*256>135
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ld bc, 512+48
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dec e
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jr z, goit
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dec e
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ld bc, 1024+32
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jr z, goit
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ld c, 16
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ELSE
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ld bc, 512+160
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dec e
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jr z, goit
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dec e
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ld bc, 1024+144
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jr z, goit
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ld c, 128
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ENDIF
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goit
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IF reuse=1
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IF mapbase-mapbase/256*256<240 AND mapbase-mapbase/256*256>135
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ld e, (ix-152+mapbase-mapbase/256*256)
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ELSE
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ld e, (ix-6+mapbase-(mapbase+16)/256*256)
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ENDIF
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bit 1, e
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jr z, aqui
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bit 2, e
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jr nz, aqui
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add a, a
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call z, getbit
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ld de, (mapbase+156)
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jr c, caof
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aqui
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ENDIF
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call getbits
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ld iyl, c
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add iy, de
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call getpair
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IF reuse=1
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ld (mapbase+156), de
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ENDIF
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caof pop bc
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ex (sp), hl
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ex de, hl
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add hl, de
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lddr
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pop hl
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jr mloop
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IF literals=1
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litcat
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IF mapbase-mapbase/256*256<240 AND mapbase-mapbase/256*256>135
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rl c
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ENDIF
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ret pe
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push de
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ld b, 16
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call getbits
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ld b, d
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ld c, e
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pop de
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lddr
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IF reuse=1
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scf
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ENDIF
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jr mloo1
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ENDIF
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IF mapbase-mapbase/256*256<240 AND mapbase-mapbase/256*256>135
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getpair ld b, (iy-256+mapbase-mapbase/256*256)
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ELSE
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getpair ld b, (iy-112+mapbase-(mapbase+16)/256*256)
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ENDIF
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call getbits
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ex de, hl
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IF mapbase-mapbase/256*256<240 AND mapbase-mapbase/256*256>135
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ld c, (iy-204+mapbase-mapbase/256*256)
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ld b, (iy-152+mapbase-mapbase/256*256)
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ELSE
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ld c, (iy-60+mapbase-(mapbase+16)/256*256)
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ld b, (iy-8+mapbase-(mapbase+16)/256*256)
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ENDIF
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add hl, bc
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ex de, hl
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ret
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getbits ld de, 0
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gbcont dec b
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ret m
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add a, a
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call z, getbit
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rl e
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rl d
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jr gbcont
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getbit ld a, (hl)
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dec hl
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adc a, a
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ret |