hgr_viewer: update and put things together
This commit is contained in:
Vince Weaver
parent
d0c491b6b7
commit
77bd42616f
|
|
@ -1,32 +0,0 @@
|
|||
include ../../../Makefile.inc
|
||||
|
||||
DOS33 = ../../../utils/dos33fs-utils/dos33
|
||||
DOS33_RAW = ../../../utils/dos33fs-utils/dos33_raw
|
||||
TOKENIZE = ../../../utils/asoft_basic-utils/tokenize_asoft
|
||||
LINKER_SCRIPTS = ../../../linker_scripts
|
||||
EMPTY_DISK = ../../../empty_disk
|
||||
|
||||
all: mona.dsk
|
||||
|
||||
mona.dsk: HELLO MONA
|
||||
cp $(EMPTY_DISK)/empty.dsk mona.dsk
|
||||
$(DOS33) -y mona.dsk SAVE A HELLO
|
||||
$(DOS33) -y mona.dsk BSAVE -a 0x6000 MONA
|
||||
###
|
||||
|
||||
HELLO: hello.bas
|
||||
$(TOKENIZE) < hello.bas > HELLO
|
||||
|
||||
###
|
||||
|
||||
MONA: mona.o
|
||||
ld65 -o MONA mona.o -C $(LINKER_SCRIPTS)/apple2_6000.inc
|
||||
|
||||
mona.o: mona.s graphics/graphics.inc
|
||||
ca65 -o mona.o mona.s -l mona.lst
|
||||
|
||||
###
|
||||
|
||||
clean:
|
||||
rm -f *~ *.o *.lst HELLO MONA
|
||||
|
||||
|
|
@ -1,370 +0,0 @@
|
|||
; note -- modified by Vince Weaver to assemble with ca65
|
||||
; in this case, A = page to decompress to
|
||||
; getsrc_smc+1, getsrc_smc+2 is src location
|
||||
|
||||
; -----------------------------------------------------------------------------
|
||||
; Decompress raw LZSA2 block.
|
||||
; Create one with lzsa -r -f2 <original_file> <compressed_file>
|
||||
;
|
||||
; in:
|
||||
; * LZSA_SRC_LO and LZSA_SRC_HI contain the compressed raw block address
|
||||
; * LZSA_DST_LO and LZSA_DST_HI contain the destination buffer address
|
||||
;
|
||||
; out:
|
||||
; * LZSA_DST_LO and LZSA_DST_HI contain the last decompressed byte address, +1
|
||||
;
|
||||
; -----------------------------------------------------------------------------
|
||||
; Backward decompression is also supported, use lzsa -r -b -f2 <original_file> <compressed_file>
|
||||
; To use it, also define BACKWARD_DECOMPRESS=1 before including this code!
|
||||
;
|
||||
; in:
|
||||
; * LZSA_SRC_LO/LZSA_SRC_HI must contain the address of the last byte of compressed data
|
||||
; * LZSA_DST_LO/LZSA_DST_HI must contain the address of the last byte of the destination buffer
|
||||
;
|
||||
; out:
|
||||
; * LZSA_DST_LO/LZSA_DST_HI contain the last decompressed byte address, -1
|
||||
;
|
||||
; -----------------------------------------------------------------------------
|
||||
;
|
||||
; Copyright (C) 2019 Emmanuel Marty, Peter Ferrie
|
||||
;
|
||||
; This software is provided 'as-is', without any express or implied
|
||||
; warranty. In no event will the authors be held liable for any damages
|
||||
; arising from the use of this software.
|
||||
;
|
||||
; Permission is granted to anyone to use this software for any purpose,
|
||||
; including commercial applications, and to alter it and redistribute it
|
||||
; freely, subject to the following restrictions:
|
||||
;
|
||||
; 1. The origin of this software must not be misrepresented; you must not
|
||||
; claim that you wrote the original software. If you use this software
|
||||
; in a product, an acknowledgment in the product documentation would be
|
||||
; appreciated but is not required.
|
||||
; 2. Altered source versions must be plainly marked as such, and must not be
|
||||
; misrepresented as being the original software.
|
||||
; 3. This notice may not be removed or altered from any source distribution.
|
||||
; -----------------------------------------------------------------------------
|
||||
|
||||
;NIBCOUNT = $FC ; zero-page location for temp offset
|
||||
|
||||
decompress_lzsa2_fast:
|
||||
|
||||
sta LZSA_DST_HI
|
||||
|
||||
ldy #$00
|
||||
sty LZSA_DST_LO
|
||||
sty NIBCOUNT
|
||||
|
||||
decode_token:
|
||||
jsr getsrc ; read token byte: XYZ|LL|MMM
|
||||
pha ; preserve token on stack
|
||||
|
||||
and #$18 ; isolate literals count (LL)
|
||||
beq no_literals ; skip if no literals to copy
|
||||
cmp #$18 ; LITERALS_RUN_LEN_V2?
|
||||
bcc prepare_copy_literals ; if less, count is directly embedded in token
|
||||
|
||||
jsr getnibble ; get extra literals length nibble
|
||||
; add nibble to len from token
|
||||
adc #$02 ; (LITERALS_RUN_LEN_V2) minus carry
|
||||
cmp #$12 ; LITERALS_RUN_LEN_V2 + 15 ?
|
||||
bcc prepare_copy_literals_direct ; if less, literals count is complete
|
||||
|
||||
jsr getsrc ; get extra byte of variable literals count
|
||||
; the carry is always set by the CMP above
|
||||
; GETSRC doesn't change it
|
||||
sbc #$EE ; overflow?
|
||||
jmp prepare_copy_literals_direct
|
||||
|
||||
prepare_copy_literals_large:
|
||||
; handle 16 bits literals count
|
||||
; literals count = directly these 16 bits
|
||||
jsr getlargesrc ; grab low 8 bits in X, high 8 bits in A
|
||||
tay ; put high 8 bits in Y
|
||||
bcs prepare_copy_literals_high ; (*same as JMP PREPARE_COPY_LITERALS_HIGH but shorter)
|
||||
|
||||
prepare_copy_literals:
|
||||
lsr ; shift literals count into place
|
||||
lsr
|
||||
lsr
|
||||
|
||||
prepare_copy_literals_direct:
|
||||
tax
|
||||
bcs prepare_copy_literals_large ; if so, literals count is large
|
||||
|
||||
prepare_copy_literals_high:
|
||||
txa
|
||||
beq copy_literals
|
||||
iny
|
||||
|
||||
copy_literals:
|
||||
jsr getput ; copy one byte of literals
|
||||
dex
|
||||
bne copy_literals
|
||||
dey
|
||||
bne copy_literals
|
||||
|
||||
no_literals:
|
||||
pla ; retrieve token from stack
|
||||
pha ; preserve token again
|
||||
asl
|
||||
bcs repmatch_or_large_offset ; 1YZ: rep-match or 13/16 bit offset
|
||||
|
||||
asl ; 0YZ: 5 or 9 bit offset
|
||||
bcs offset_9_bit
|
||||
|
||||
; 00Z: 5 bit offset
|
||||
|
||||
ldx #$FF ; set offset bits 15-8 to 1
|
||||
|
||||
jsr getcombinedbits ; rotate Z bit into bit 0, read nibble for bits 4-1
|
||||
ora #$E0 ; set bits 7-5 to 1
|
||||
bne got_offset_lo ; go store low byte of match offset and prepare match
|
||||
|
||||
offset_9_bit: ; 01Z: 9 bit offset
|
||||
;;asl ; shift Z (offset bit 8) in place
|
||||
rol
|
||||
rol
|
||||
and #$01
|
||||
eor #$FF ; set offset bits 15-9 to 1
|
||||
bne got_offset_hi ; go store high byte, read low byte of match offset and prepare match
|
||||
; (*same as JMP GOT_OFFSET_HI but shorter)
|
||||
|
||||
repmatch_or_large_offset:
|
||||
asl ; 13 bit offset?
|
||||
bcs repmatch_or_16bit ; handle rep-match or 16-bit offset if not
|
||||
|
||||
; 10Z: 13 bit offset
|
||||
|
||||
jsr getcombinedbits ; rotate Z bit into bit 8, read nibble for bits 12-9
|
||||
adc #$DE ; set bits 15-13 to 1 and substract 2 (to substract 512)
|
||||
bne got_offset_hi ; go store high byte, read low byte of match offset and prepare match
|
||||
; (*same as JMP GOT_OFFSET_HI but shorter)
|
||||
|
||||
repmatch_or_16bit: ; rep-match or 16 bit offset
|
||||
;;ASL ; XYZ=111?
|
||||
bmi rep_match ; reuse previous offset if so (rep-match)
|
||||
|
||||
; 110: handle 16 bit offset
|
||||
jsr getsrc ; grab high 8 bits
|
||||
got_offset_hi:
|
||||
tax
|
||||
jsr getsrc ; grab low 8 bits
|
||||
got_offset_lo:
|
||||
sta OFFSLO ; store low byte of match offset
|
||||
stx OFFSHI ; store high byte of match offset
|
||||
|
||||
rep_match:
|
||||
.ifdef BACKWARD_DECOMPRESS
|
||||
|
||||
; Backward decompression - substract match offset
|
||||
|
||||
sec ; add dest + match offset
|
||||
lda putdst+1 ; low 8 bits
|
||||
OFFSLO = *+1
|
||||
sbc #$AA
|
||||
sta copy_match_loop+1 ; store back reference address
|
||||
lda putdst+2
|
||||
OFFSHI = *+1
|
||||
sbc #$AA ; high 8 bits
|
||||
sta copy_match_loop+2 ; store high 8 bits of address
|
||||
sec
|
||||
|
||||
.else
|
||||
|
||||
; Forward decompression - add match offset
|
||||
|
||||
clc ; add dest + match offset
|
||||
lda putdst+1 ; low 8 bits
|
||||
OFFSLO = *+1
|
||||
adc #$AA
|
||||
sta copy_match_loop+1 ; store back reference address
|
||||
OFFSHI = *+1
|
||||
lda #$AA ; high 8 bits
|
||||
adc putdst+2
|
||||
sta copy_match_loop+2 ; store high 8 bits of address
|
||||
.endif
|
||||
|
||||
pla ; retrieve token from stack again
|
||||
and #$07 ; isolate match len (MMM)
|
||||
adc #$01 ; add MIN_MATCH_SIZE_V2 and carry
|
||||
cmp #$09 ; MIN_MATCH_SIZE_V2 + MATCH_RUN_LEN_V2?
|
||||
bcc prepare_copy_match ; if less, length is directly embedded in token
|
||||
|
||||
jsr getnibble ; get extra match length nibble
|
||||
; add nibble to len from token
|
||||
adc #$08 ; (MIN_MATCH_SIZE_V2 + MATCH_RUN_LEN_V2) minus carry
|
||||
cmp #$18 ; MIN_MATCH_SIZE_V2 + MATCH_RUN_LEN_V2 + 15?
|
||||
bcc prepare_copy_match ; if less, match length is complete
|
||||
|
||||
jsr getsrc ; get extra byte of variable match length
|
||||
; the carry is always set by the CMP above
|
||||
; GETSRC doesn't change it
|
||||
sbc #$E8 ; overflow?
|
||||
|
||||
prepare_copy_match:
|
||||
tax
|
||||
bcc prepare_copy_match_y ; if not, the match length is complete
|
||||
beq decompression_done ; if EOD code, bail
|
||||
|
||||
; Handle 16 bits match length
|
||||
jsr getlargesrc ; grab low 8 bits in X, high 8 bits in A
|
||||
tay ; put high 8 bits in Y
|
||||
|
||||
prepare_copy_match_y:
|
||||
txa
|
||||
beq copy_match_loop
|
||||
iny
|
||||
|
||||
copy_match_loop:
|
||||
lda $AAAA ; get one byte of backreference
|
||||
jsr putdst ; copy to destination
|
||||
|
||||
.ifdef BACKWARD_DECOMPRESS
|
||||
|
||||
; Backward decompression -- put backreference bytes backward
|
||||
|
||||
lda copy_match_loop+1
|
||||
beq getmatch_adj_hi
|
||||
getmatch_done:
|
||||
dec copy_match_loop+1
|
||||
|
||||
.else
|
||||
|
||||
; Forward decompression -- put backreference bytes forward
|
||||
|
||||
inc copy_match_loop+1
|
||||
beq getmatch_adj_hi
|
||||
getmatch_done:
|
||||
|
||||
.endif
|
||||
|
||||
dex
|
||||
bne copy_match_loop
|
||||
dey
|
||||
bne copy_match_loop
|
||||
jmp decode_token
|
||||
|
||||
.ifdef BACKWARD_DECOMPRESS
|
||||
|
||||
getmatch_adj_hi:
|
||||
dec copy_match_loop+2
|
||||
jmp getmatch_done
|
||||
|
||||
.else
|
||||
|
||||
getmatch_adj_hi:
|
||||
inc copy_match_loop+2
|
||||
jmp getmatch_done
|
||||
.endif
|
||||
|
||||
getcombinedbits:
|
||||
eor #$80
|
||||
asl
|
||||
php
|
||||
|
||||
jsr getnibble ; get nibble into bits 0-3 (for offset bits 1-4)
|
||||
plp ; merge Z bit as the carry bit (for offset bit 0)
|
||||
combinedbitz:
|
||||
rol ; nibble -> bits 1-4; carry(!Z bit) -> bit 0 ; carry cleared
|
||||
decompression_done:
|
||||
rts
|
||||
|
||||
getnibble:
|
||||
NIBBLES = *+1
|
||||
lda #$AA
|
||||
lsr NIBCOUNT
|
||||
bcc need_nibbles
|
||||
and #$0F ; isolate low 4 bits of nibble
|
||||
rts
|
||||
|
||||
need_nibbles:
|
||||
inc NIBCOUNT
|
||||
jsr getsrc ; get 2 nibbles
|
||||
sta NIBBLES
|
||||
lsr
|
||||
lsr
|
||||
lsr
|
||||
lsr
|
||||
sec
|
||||
rts
|
||||
|
||||
.ifdef BACKWARD_DECOMPRESS
|
||||
|
||||
; Backward decompression -- get and put bytes backward
|
||||
|
||||
getput:
|
||||
jsr getsrc
|
||||
putdst:
|
||||
LZSA_DST_LO = *+1
|
||||
LZSA_DST_HI = *+2
|
||||
sta $AAAA
|
||||
lda putdst+1
|
||||
beq putdst_adj_hi
|
||||
dec putdst+1
|
||||
rts
|
||||
|
||||
putdst_adj_hi:
|
||||
dec putdst+2
|
||||
dec putdst+1
|
||||
rts
|
||||
|
||||
getlargesrc:
|
||||
jsr getsrc ; grab low 8 bits
|
||||
tax ; move to X
|
||||
; fall through grab high 8 bits
|
||||
|
||||
getsrc:
|
||||
LZSA_SRC_LO = *+1
|
||||
LZSA_SRC_HI = *+2
|
||||
lda $AAAA
|
||||
pha
|
||||
lda getsrc+1
|
||||
beq getsrc_adj_hi
|
||||
dec getsrc+1
|
||||
pla
|
||||
rts
|
||||
|
||||
getsrc_adj_hi:
|
||||
dec getsrc+2
|
||||
dec getsrc+1
|
||||
pla
|
||||
rts
|
||||
|
||||
.else
|
||||
|
||||
; Forward decompression -- get and put bytes forward
|
||||
|
||||
getput:
|
||||
jsr getsrc
|
||||
putdst:
|
||||
LZSA_DST_LO = *+1
|
||||
LZSA_DST_HI = *+2
|
||||
sta $AAAA
|
||||
inc putdst+1
|
||||
beq putdst_adj_hi
|
||||
rts
|
||||
|
||||
putdst_adj_hi:
|
||||
inc putdst+2
|
||||
rts
|
||||
|
||||
getlargesrc:
|
||||
jsr getsrc ; grab low 8 bits
|
||||
tax ; move to X
|
||||
; fall through grab high 8 bits
|
||||
|
||||
getsrc:
|
||||
getsrc_smc:
|
||||
LZSA_SRC_LO = *+1
|
||||
LZSA_SRC_HI = *+2
|
||||
lda $AAAA
|
||||
inc getsrc+1
|
||||
beq getsrc_adj_hi
|
||||
rts
|
||||
|
||||
getsrc_adj_hi:
|
||||
inc getsrc+2
|
||||
rts
|
||||
.endif
|
||||
|
||||
|
|
@ -1 +0,0 @@
|
|||
mona.png: by JiskeyJasket on twitter
|
||||
|
|
@ -1,3 +0,0 @@
|
|||
5 HOME
|
||||
20 PRINT CHR$(4)"CATALOG"
|
||||
|
||||
|
|
@ -1,27 +0,0 @@
|
|||
|
||||
NIBCOUNT = $09
|
||||
|
||||
HGR2 = $F3D8
|
||||
|
||||
|
||||
hgr_display:
|
||||
jsr HGR2 ; Hi-res graphics, no text at bottom
|
||||
; Y=0, A=0 after this called
|
||||
|
||||
lda #<(mona_lzsa)
|
||||
sta getsrc_smc+1
|
||||
lda #>(mona_lzsa)
|
||||
sta getsrc_smc+2
|
||||
|
||||
lda #$40
|
||||
|
||||
jsr decompress_lzsa2_fast
|
||||
|
||||
|
||||
forever:
|
||||
jmp forever
|
||||
|
||||
|
||||
.include "decompress_fast_v2.s"
|
||||
|
||||
.include "graphics/graphics.inc"
|
||||
|
|
@ -4,109 +4,85 @@ DOS33 = ../../utils/dos33fs-utils/dos33
|
|||
B2D = ../../utils/bmp2dhr/b2d
|
||||
PNG_TO_40x96 = ../../utils/gr-utils/png_to_40x96
|
||||
PNG_TO_RLE = ../../utils/gr-utils/png2rle
|
||||
EMPTY_DISK = ../../empty_disk/empty.dsk
|
||||
TOKENIZE = ../../utils/asoft_basic-utils/tokenize_asoft
|
||||
|
||||
all: hires.dsk
|
||||
all: hires_plain.dsk hires_special.dsk hires_jiskey.dsk
|
||||
|
||||
hires.dsk: HELLO HIRES bbl.img.lz4t bbl2.img.lz4t \
|
||||
girl.hgr.lz4t 1bg.hgr.lz4t fup.hgr.lz4t witch.hgr.lz4t
|
||||
$(DOS33) -y hires.dsk SAVE A HELLO
|
||||
$(DOS33) -y hires.dsk BSAVE -a 0x0c00 HIRES
|
||||
$(DOS33) -y hires.dsk BSAVE -a 0xa000 bbl.img.lz4t BBL.LZ4
|
||||
$(DOS33) -y hires.dsk BSAVE -a 0xa000 bbl2.img.lz4t BBL2.LZ4
|
||||
$(DOS33) -y hires.dsk BSAVE -a 0xa000 girl.hgr.lz4t GIRL.LZ4
|
||||
$(DOS33) -y hires.dsk BSAVE -a 0xa000 1bg.hgr.lz4t OBG.LZ4
|
||||
$(DOS33) -y hires.dsk BSAVE -a 0xa000 fup.hgr.lz4t FUP.LZ4
|
||||
$(DOS33) -y hires.dsk BSAVE -a 0xa000 witch.hgr.lz4t WITCH.LZ4
|
||||
hires_special.dsk: HELLO HIRES_SPECIAL \
|
||||
special/bbl.hgr.zx02 special/bbl2.hgr.zx02 \
|
||||
special/grl.hgr.zx02 special/1bg.hgr.zx02 \
|
||||
special/fup.hgr.zx02 special/witch.hgr.zx02
|
||||
cp $(EMPTY_DISK) hires_special.dsk
|
||||
$(DOS33) -y hires_special.dsk SAVE A HELLO
|
||||
$(DOS33) -y hires_special.dsk BSAVE -a 0x0c00 HIRES_SPECIAL HIRES
|
||||
$(DOS33) -y hires_special.dsk BSAVE -a 0xa000 ./special/bbl.hgr.zx02 BBL.ZX02
|
||||
$(DOS33) -y hires_special.dsk BSAVE -a 0xa000 ./special/bbl2.hgr.zx02 BBL2.ZX02
|
||||
$(DOS33) -y hires_special.dsk BSAVE -a 0xa000 ./special/grl.hgr.zx02 GRL.ZX02
|
||||
$(DOS33) -y hires_special.dsk BSAVE -a 0xa000 ./special/1bg.hgr.zx02 OBG.ZX02
|
||||
$(DOS33) -y hires_special.dsk BSAVE -a 0xa000 ./special/fup.hgr.zx02 FUP.ZX02
|
||||
$(DOS33) -y hires_special.dsk BSAVE -a 0xa000 ./special/witch.hgr.zx02 WITCH.ZX02
|
||||
|
||||
####
|
||||
|
||||
HIRES: hires.o
|
||||
ld65 -o HIRES hires.o -C ../../linker_scripts/apple2_c00.inc
|
||||
hires_plain.dsk: HELLO HIRES_PLAIN \
|
||||
./plain/gp.hgr.zx02 ./plain/peddle.hgr.zx02
|
||||
cp $(EMPTY_DISK) hires_plain.dsk
|
||||
$(DOS33) -y hires_plain.dsk SAVE A HELLO
|
||||
$(DOS33) -y hires_plain.dsk BSAVE -a 0x0c00 HIRES_PLAIN HIRES
|
||||
$(DOS33) -y hires_plain.dsk BSAVE -a 0xa000 ./plain/gp.hgr.zx02 GP.ZX02
|
||||
$(DOS33) -y hires_plain.dsk BSAVE -a 0xa000 ./plain/peddle.hgr.zx02 PEDDLE.ZX02
|
||||
|
||||
hires.o: hires.s \
|
||||
####
|
||||
|
||||
hires_jiskey.dsk: HELLO HIRES_JISKEY \
|
||||
jiskey/grl.hgr.zx02 jiskey/witch.hgr.zx02 \
|
||||
jiskey/mona.hgr.zx02 jiskey/gw.hgr.zx02
|
||||
cp $(EMPTY_DISK) hires_jiskey.dsk
|
||||
$(DOS33) -y hires_jiskey.dsk SAVE A HELLO
|
||||
$(DOS33) -y hires_jiskey.dsk BSAVE -a 0x0c00 HIRES_JISKEY HIRES
|
||||
$(DOS33) -y hires_jiskey.dsk BSAVE -a 0xa000 ./jiskey/grl.hgr.zx02 GRL.ZX02
|
||||
$(DOS33) -y hires_jiskey.dsk BSAVE -a 0xa000 ./jiskey/witch.hgr.zx02 WITCH.ZX02
|
||||
$(DOS33) -y hires_jiskey.dsk BSAVE -a 0xa000 ./jiskey/mona.hgr.zx02 MONA.ZX02
|
||||
$(DOS33) -y hires_jiskey.dsk BSAVE -a 0xa000 ./jiskey/gw.hgr.zx02 GW.ZX02
|
||||
|
||||
|
||||
####
|
||||
|
||||
HIRES_SPECIAL: hires_special.o
|
||||
ld65 -o HIRES_SPECIAL hires_special.o -C ../../linker_scripts/apple2_c00.inc
|
||||
|
||||
hires_special.o: hires_special.s zx02_optim.s \
|
||||
zp.inc hardware.inc
|
||||
ca65 -o hires.o hires.s -l hires.lst
|
||||
ca65 -o hires_special.o hires_special.s -l hires_special.lst
|
||||
|
||||
####
|
||||
|
||||
HIRES_PLAIN: hires_plain.o
|
||||
ld65 -o HIRES_PLAIN hires_plain.o -C ../../linker_scripts/apple2_c00.inc
|
||||
|
||||
hires_plain.o: hires_plain.s \
|
||||
zp.inc hardware.inc
|
||||
ca65 -o hires_plain.o hires_plain.s -l hires_plain.lst
|
||||
|
||||
####
|
||||
|
||||
HIRES_JISKEY: hires_jiskey.o
|
||||
ld65 -o HIRES_JISKEY hires_jiskey.o -C ../../linker_scripts/apple2_c00.inc
|
||||
|
||||
hires_jiskey.o: hires_jiskey.s \
|
||||
zp.inc hardware.inc
|
||||
ca65 -o hires_jiskey.o hires_jiskey.s -l hires_jiskey.lst
|
||||
|
||||
|
||||
####
|
||||
|
||||
HELLO: hello.bas
|
||||
$(TOKENIZE) < hello.bas > HELLO
|
||||
|
||||
####
|
||||
|
||||
bbl.img.lz4t: bbl.img.lz4
|
||||
dd if=bbl.img.lz4 of=bbl.img.lz4t bs=1 skip=11
|
||||
truncate bbl.img.lz4t -s -8
|
||||
|
||||
bbl.img.lz4: bbl.img
|
||||
lz4 -f -16 bbl.img
|
||||
|
||||
bbl.img: bbl.png
|
||||
../hgr-utils/png2hgr bbl.png > bbl.img
|
||||
|
||||
####
|
||||
|
||||
bbl2.img.lz4t: bbl2.img.lz4
|
||||
dd if=bbl2.img.lz4 of=bbl2.img.lz4t bs=1 skip=11
|
||||
truncate bbl2.img.lz4t -s -8
|
||||
|
||||
bbl2.img.lz4: bbl2.img
|
||||
lz4 -f -16 bbl2.img
|
||||
|
||||
bbl2.img: bbl2.png
|
||||
../hgr-utils/png2hgr bbl2.png > bbl2.img
|
||||
|
||||
####
|
||||
|
||||
1bg.hgr.lz4t: 1bg.hgr.lz4
|
||||
dd if=1bg.hgr.lz4 of=1bg.hgr.lz4t bs=1 skip=11
|
||||
truncate 1bg.hgr.lz4t -s -8
|
||||
|
||||
1bg.hgr.lz4: 1bg.hgr
|
||||
lz4 -f -16 1bg.hgr
|
||||
|
||||
1bg.hgr: 1bg.png
|
||||
../hgr-utils/png2hgr 1bg.png > 1bg.hgr
|
||||
|
||||
|
||||
####
|
||||
|
||||
fup.hgr.lz4t: fup.hgr.lz4
|
||||
dd if=fup.hgr.lz4 of=fup.hgr.lz4t bs=1 skip=11
|
||||
truncate fup.hgr.lz4t -s -8
|
||||
|
||||
fup.hgr.lz4: fup.hgr
|
||||
lz4 -f -16 fup.hgr
|
||||
|
||||
fup.hgr: fup.png
|
||||
../hgr-utils/png2hgr fup.png > fup.hgr
|
||||
|
||||
####
|
||||
|
||||
witch.hgr.lz4t: witch.hgr.lz4
|
||||
dd if=witch.hgr.lz4 of=witch.hgr.lz4t bs=1 skip=11
|
||||
truncate witch.hgr.lz4t -s -8
|
||||
|
||||
witch.hgr.lz4: witch.hgr
|
||||
lz4 -f -16 witch.hgr
|
||||
|
||||
witch.hgr: witch.png
|
||||
../hgr-utils/png2hgr witch.png > witch.hgr
|
||||
|
||||
|
||||
|
||||
###
|
||||
|
||||
girl.hgr.lz4t: girl.hgr.lz4
|
||||
dd if=girl.hgr.lz4 of=girl.hgr.lz4t bs=1 skip=11
|
||||
truncate girl.hgr.lz4t -s -8
|
||||
|
||||
girl.hgr.lz4: girl.hgr
|
||||
lz4 -f -16 girl.hgr
|
||||
|
||||
###
|
||||
|
||||
|
||||
clean:
|
||||
rm -f *~ *.o *.lst HIRES
|
||||
rm -f *~ *.o *.lst HIRES_PLAIN HIRES_SPECIAL HIRES_JISKEY HELLO
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,84 @@
|
|||
;; HARDWARE LOCATIONS
|
||||
|
||||
KEYPRESS = $C000
|
||||
KEYRESET = $C010
|
||||
|
||||
;; SOFT SWITCHES
|
||||
CLR80COL = $C000 ; PAGE0/PAGE1 normal
|
||||
SET80COL = $C001 ; PAGE0/PAGE1 switches PAGE0 in Aux instead
|
||||
EIGHTYCOLOFF = $C00C
|
||||
EIGHTYCOLON = $C00D
|
||||
SPEAKER = $C030
|
||||
SET_GR = $C050
|
||||
SET_TEXT = $C051
|
||||
FULLGR = $C052
|
||||
TEXTGR = $C053
|
||||
PAGE0 = $C054
|
||||
PAGE1 = $C055
|
||||
LORES = $C056 ; Enable LORES graphics
|
||||
HIRES = $C057 ; Enable HIRES graphics
|
||||
AN3 = $C05E ; Annunciator 3
|
||||
|
||||
PADDLE_BUTTON0 = $C061
|
||||
PADDL0 = $C064
|
||||
PTRIG = $C070
|
||||
|
||||
;; BASIC ROUTINES
|
||||
|
||||
NORMAL = $F273
|
||||
|
||||
;; MONITOR ROUTINES
|
||||
|
||||
HLINE = $F819 ;; HLINE Y,$2C at A
|
||||
VLINE = $F828 ;; VLINE A,$2D at Y
|
||||
CLRSCR = $F832 ;; Clear low-res screen
|
||||
CLRTOP = $F836 ;; clear only top of low-res screen
|
||||
SETCOL = $F864 ;; COLOR=A
|
||||
TEXT = $FB36
|
||||
TABV = $FB5B ;; VTAB to A
|
||||
BASCALC = $FBC1 ;;
|
||||
VTAB = $FC22 ;; VTAB to CV
|
||||
HOME = $FC58 ;; Clear the text screen
|
||||
WAIT = $FCA8 ;; delay 1/2(26+27A+5A^2) us
|
||||
SETINV = $FE80 ;; INVERSE
|
||||
SETNORM = $FE84 ;; NORMAL
|
||||
COUT = $FDED ;; output A to screen
|
||||
COUT1 = $FDF0 ;; output A to screen
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
COLOR_BLACK = 0
|
||||
COLOR_RED = 1
|
||||
COLOR_DARKBLUE = 2
|
||||
COLOR_PURPLE = 3
|
||||
COLOR_DARKGREEN = 4
|
||||
COLOR_GREY = 5
|
||||
COLOR_MEDIUMBLUE = 6
|
||||
COLOR_LIGHTBLUE = 7
|
||||
COLOR_BROWN = 8
|
||||
COLOR_ORANGE = 9
|
||||
COLOR_GREY2 = 10
|
||||
COLOR_PINK = 11
|
||||
COLOR_LIGHTGREEN = 12
|
||||
COLOR_YELLOW = 13
|
||||
COLOR_AQUA = 14
|
||||
COLOR_WHITE = 15
|
||||
|
||||
COLOR_BOTH_BLACK = $00
|
||||
COLOR_BOTH_RED = $11
|
||||
COLOR_BOTH_DARKBLUE = $22
|
||||
COLOR_BOTH_DARKGREEN = $44
|
||||
COLOR_BOTH_GREY = $55
|
||||
COLOR_BOTH_MEDIUMBLUE = $66
|
||||
COLOR_BOTH_LIGHTBLUE = $77
|
||||
COLOR_BOTH_BROWN = $88
|
||||
COLOR_BOTH_ORANGE = $99
|
||||
COLOR_BOTH_PINK = $BB
|
||||
COLOR_BOTH_LIGHTGREEN = $CC
|
||||
COLOR_BOTH_YELLOW = $DD
|
||||
COLOR_BOTH_AQUA = $EE
|
||||
COLOR_BOTH_WHITE = $FF
|
||||
|
||||
|
|
@ -0,0 +1,2 @@
|
|||
5 HOME
|
||||
105 PRINT CHR$ (4)"BRUN HIRES"
|
||||
|
|
@ -0,0 +1,128 @@
|
|||
; VMW Productions HIRES viewer
|
||||
;
|
||||
; by deater (Vince Weaver) <vince@deater.net>
|
||||
|
||||
.include "zp.inc"
|
||||
.include "hardware.inc"
|
||||
|
||||
hires_start:
|
||||
|
||||
;===================
|
||||
; Init RTS disk code
|
||||
;===================
|
||||
|
||||
jsr rts_init
|
||||
|
||||
;===================
|
||||
; set graphics mode
|
||||
;===================
|
||||
jsr HOME
|
||||
|
||||
bit HIRES
|
||||
bit FULLGR
|
||||
bit SET_GR
|
||||
bit PAGE0
|
||||
|
||||
;===================
|
||||
; Load graphics
|
||||
;===================
|
||||
load_loop:
|
||||
|
||||
;=============================
|
||||
|
||||
lda #<grl_filename
|
||||
sta OUTL
|
||||
lda #>grl_filename
|
||||
sta OUTH
|
||||
|
||||
jsr load_image
|
||||
|
||||
jsr wait_until_keypress
|
||||
|
||||
|
||||
;=============================
|
||||
|
||||
lda #<witch_filename
|
||||
sta OUTL
|
||||
lda #>witch_filename
|
||||
sta OUTH
|
||||
|
||||
jsr load_image
|
||||
|
||||
jsr wait_until_keypress
|
||||
|
||||
;=============================
|
||||
|
||||
;=============================
|
||||
|
||||
lda #<mona_filename
|
||||
sta OUTL
|
||||
lda #>mona_filename
|
||||
sta OUTH
|
||||
|
||||
jsr load_image
|
||||
|
||||
jsr wait_until_keypress
|
||||
|
||||
;=============================
|
||||
|
||||
;=============================
|
||||
|
||||
lda #<gw_filename
|
||||
sta OUTL
|
||||
lda #>gw_filename
|
||||
sta OUTH
|
||||
|
||||
jsr load_image
|
||||
|
||||
jsr wait_until_keypress
|
||||
|
||||
;=============================
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
jmp load_loop
|
||||
|
||||
|
||||
;==========================
|
||||
; Load Image
|
||||
;===========================
|
||||
|
||||
load_image:
|
||||
jsr opendir_filename ; open and read entire file into memory
|
||||
|
||||
; size in ldsizeh:ldsizel (f1/f0)
|
||||
|
||||
comp_data = $a000
|
||||
out_addr = $2000
|
||||
|
||||
|
||||
jsr full_decomp
|
||||
|
||||
rts
|
||||
|
||||
.align $100
|
||||
.include "wait_keypress.s"
|
||||
.include "zx02_optim.s"
|
||||
.include "rts.s"
|
||||
|
||||
|
||||
; filename to open is 30-character Apple text:
|
||||
grl_filename: ; .byte "GRL.ZX02",0
|
||||
.byte 'G'|$80,'R'|$80,'L'|$80,'.'|$80,'Z'|$80,'X'|$80
|
||||
.byte '0'|$80,'2'|$80,$00
|
||||
|
||||
witch_filename: ; .byte "WITCH.ZX02",0
|
||||
.byte 'W'|$80,'I'|$80,'T'|$80,'C'|$80,'H'|$80
|
||||
.byte '.'|$80,'Z'|$80,'X'|$80,'0'|$80,'2'|$80,$00
|
||||
|
||||
mona_filename: ; .byte "MONA.ZX02",0
|
||||
.byte 'M'|$80,'O'|$80,'N'|$80,'A'|$80
|
||||
.byte '.'|$80,'Z'|$80,'X'|$80,'0'|$80,'2'|$80,$00
|
||||
|
||||
gw_filename: ; .byte "GW.ZX02",0
|
||||
.byte 'G'|$80,'W'|$80
|
||||
.byte '.'|$80,'Z'|$80,'X'|$80,'0'|$80,'2'|$80,$00
|
||||
|
||||
|
|
@ -0,0 +1,89 @@
|
|||
; VMW Productions HIRES viewer
|
||||
;
|
||||
; by deater (Vince Weaver) <vince@deater.net>
|
||||
|
||||
.include "zp.inc"
|
||||
.include "hardware.inc"
|
||||
|
||||
hires_start:
|
||||
|
||||
;===================
|
||||
; Init RTS disk code
|
||||
;===================
|
||||
|
||||
jsr rts_init
|
||||
|
||||
;===================
|
||||
; set graphics mode
|
||||
;===================
|
||||
jsr HOME
|
||||
|
||||
bit HIRES
|
||||
bit FULLGR
|
||||
bit SET_GR
|
||||
bit PAGE0
|
||||
|
||||
;===================
|
||||
; Load graphics
|
||||
;===================
|
||||
load_loop:
|
||||
|
||||
;=============================
|
||||
|
||||
lda #<gp_filename
|
||||
sta OUTL
|
||||
lda #>gp_filename
|
||||
sta OUTH
|
||||
|
||||
jsr load_image
|
||||
|
||||
jsr wait_until_keypress
|
||||
|
||||
;=============================
|
||||
|
||||
lda #<peddle_filename
|
||||
sta OUTL
|
||||
lda #>peddle_filename
|
||||
sta OUTH
|
||||
|
||||
jsr load_image
|
||||
|
||||
jsr wait_until_keypress
|
||||
|
||||
;=============================
|
||||
|
||||
|
||||
jmp load_loop
|
||||
|
||||
|
||||
;==========================
|
||||
; Load Image
|
||||
;===========================
|
||||
|
||||
load_image:
|
||||
jsr opendir_filename ; open and read entire file into memory
|
||||
|
||||
; size in ldsizeh:ldsizel (f1/f0)
|
||||
|
||||
comp_data = $a000
|
||||
out_addr = $2000
|
||||
|
||||
|
||||
jsr full_decomp
|
||||
|
||||
rts
|
||||
|
||||
.align $100
|
||||
.include "wait_keypress.s"
|
||||
.include "zx02_optim.s"
|
||||
.include "rts.s"
|
||||
|
||||
|
||||
; filename to open is 30-character Apple text:
|
||||
gp_filename: ; .byte "GP.ZX02",0
|
||||
.byte 'G'|$80,'P'|$80
|
||||
.byte '.'|$80,'Z'|$80,'X'|$80,'0'|$80,'2'|$80,$00
|
||||
|
||||
peddle_filename: ; .byte "PEDDLE.ZX02",0
|
||||
.byte 'P'|$80,'E'|$80,'D'|$80,'D'|$80,'L'|$80,'E'|$80
|
||||
.byte '.'|$80,'Z'|$80,'X'|$80,'0'|$80,'2'|$80,$00
|
||||
|
|
@ -0,0 +1,156 @@
|
|||
; VMW Productions HIRES viewer
|
||||
;
|
||||
; by deater (Vince Weaver) <vince@deater.net>
|
||||
|
||||
.include "zp.inc"
|
||||
.include "hardware.inc"
|
||||
|
||||
hires_start:
|
||||
|
||||
;===================
|
||||
; Init RTS disk code
|
||||
;===================
|
||||
|
||||
jsr rts_init
|
||||
|
||||
;===================
|
||||
; set graphics mode
|
||||
;===================
|
||||
jsr HOME
|
||||
|
||||
bit HIRES
|
||||
bit FULLGR
|
||||
bit SET_GR
|
||||
bit PAGE0
|
||||
|
||||
;===================
|
||||
; Load graphics
|
||||
;===================
|
||||
load_loop:
|
||||
|
||||
;=============================
|
||||
|
||||
lda #<bbl_filename
|
||||
sta OUTL
|
||||
lda #>bbl_filename
|
||||
sta OUTH
|
||||
|
||||
jsr load_image
|
||||
|
||||
jsr wait_until_keypress
|
||||
|
||||
;=============================
|
||||
|
||||
lda #<bbl2_filename
|
||||
sta OUTL
|
||||
lda #>bbl2_filename
|
||||
sta OUTH
|
||||
|
||||
jsr load_image
|
||||
|
||||
jsr wait_until_keypress
|
||||
|
||||
;=============================
|
||||
|
||||
lda #<grl_filename
|
||||
sta OUTL
|
||||
lda #>grl_filename
|
||||
sta OUTH
|
||||
|
||||
jsr load_image
|
||||
|
||||
jsr wait_until_keypress
|
||||
|
||||
;=============================
|
||||
|
||||
;=============================
|
||||
|
||||
lda #<obg_filename
|
||||
sta OUTL
|
||||
lda #>obg_filename
|
||||
sta OUTH
|
||||
|
||||
jsr load_image
|
||||
|
||||
jsr wait_until_keypress
|
||||
|
||||
;=============================
|
||||
|
||||
lda #<fup_filename
|
||||
sta OUTL
|
||||
lda #>fup_filename
|
||||
sta OUTH
|
||||
|
||||
jsr load_image
|
||||
|
||||
jsr wait_until_keypress
|
||||
|
||||
;=============================
|
||||
|
||||
;=============================
|
||||
|
||||
lda #<witch_filename
|
||||
sta OUTL
|
||||
lda #>witch_filename
|
||||
sta OUTH
|
||||
|
||||
jsr load_image
|
||||
|
||||
jsr wait_until_keypress
|
||||
|
||||
;=============================
|
||||
|
||||
|
||||
|
||||
|
||||
jmp load_loop
|
||||
|
||||
|
||||
;==========================
|
||||
; Load Image
|
||||
;===========================
|
||||
|
||||
load_image:
|
||||
jsr opendir_filename ; open and read entire file into memory
|
||||
|
||||
; size in ldsizeh:ldsizel (f1/f0)
|
||||
|
||||
comp_data = $a000
|
||||
out_addr = $2000
|
||||
|
||||
|
||||
jsr full_decomp
|
||||
|
||||
rts
|
||||
|
||||
.align $100
|
||||
.include "wait_keypress.s"
|
||||
.include "zx02_optim.s"
|
||||
.include "rts.s"
|
||||
|
||||
|
||||
; filename to open is 30-character Apple text:
|
||||
bbl_filename: ; .byte "BBL.ZX02",0
|
||||
.byte 'B'|$80,'B'|$80,'L'|$80,'.'|$80,'Z'|$80,'X'|$80,'0'|$80
|
||||
.byte '2'|$80,$00
|
||||
|
||||
bbl2_filename: ; .byte "BBL2.ZX02",0
|
||||
.byte 'B'|$80,'B'|$80,'L'|$80,'2'|$80,'.'|$80,'Z'|$80,'X'|$80
|
||||
.byte '0'|$80,'2'|$80,$00
|
||||
|
||||
grl_filename: ; .byte "GRL.ZX02",0
|
||||
.byte 'G'|$80,'R'|$80,'L'|$80,'.'|$80,'Z'|$80,'X'|$80
|
||||
.byte '0'|$80,'2'|$80,$00
|
||||
|
||||
obg_filename: ; .byte "OBG.ZX02",0
|
||||
.byte 'O'|$80,'B'|$80,'G'|$80,'.'|$80,'Z'|$80,'X'|$80
|
||||
.byte '0'|$80,'2'|$80,$00
|
||||
|
||||
fup_filename: ; .byte "FUP.ZX02",0
|
||||
.byte 'F'|$80,'U'|$80,'P'|$80,'.'|$80,'Z'|$80,'X'|$80
|
||||
.byte '0'|$80,'2'|$80,$00
|
||||
|
||||
witch_filename: ; .byte "WITCH.ZX02",0
|
||||
.byte 'W'|$80,'I'|$80,'T'|$80,'C'|$80,'H'|$80
|
||||
.byte '.'|$80,'Z'|$80,'X'|$80,'0'|$80,'2'|$80,$00
|
||||
|
||||
|
|
@ -0,0 +1,2 @@
|
|||
All images by JiskeyJasket on twitter
|
||||
|
||||
Binary file not shown.
Binary file not shown.
|
Before Width: | Height: | Size: 18 KiB After Width: | Height: | Size: 18 KiB |
Binary file not shown.
|
|
@ -0,0 +1,25 @@
|
|||
include ../../../Makefile.inc
|
||||
|
||||
ZX02 = ~/research/6502_compression/zx02.git/build/zx02
|
||||
PNG_TO_HGR = ../../../utils/hgr-utils/png2hgr
|
||||
|
||||
all: gp.hgr.zx02 peddle.hgr.zx02
|
||||
|
||||
####
|
||||
|
||||
gp.hgr.zx02: gp.hgr
|
||||
$(ZX02) gp.hgr gp.hgr.zx02
|
||||
|
||||
gp.hgr: gp.png
|
||||
$(PNG_TO_HGR) gp.png > gp.hgr
|
||||
|
||||
####
|
||||
|
||||
peddle.hgr.zx02: peddle.hgr
|
||||
$(ZX02) peddle.hgr peddle.hgr.zx02
|
||||
|
||||
####
|
||||
|
||||
clean:
|
||||
rm -f *~ *.o *.lst
|
||||
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
gp.png: Морская свинка by ax34 https://zxart.ee/eng/authors/a/ax34/morskaja-svinka/
|
||||
peddle.hgr: based on https://www.flickr.com/photos/textfiles/10333719586
|
||||
by Jason Scott, via Wikipedia
|
||||
Binary file not shown.
|
After Width: | Height: | Size: 20 KiB |
Binary file not shown.
|
|
@ -0,0 +1,557 @@
|
|||
; read any file slot 6 version
|
||||
; based on FASTLD6 and RTS copyright (c) Peter Ferrie 2011-2013,2018
|
||||
|
||||
; modified to assembled with ca65 -- vmw
|
||||
; added code to patch it to run from current disk slot -- vmw
|
||||
|
||||
; USAGE:
|
||||
; file to load in namlo:namhi
|
||||
; Loads file contents to addr from filesystem
|
||||
; also stores filesize in ldsizel:ldsizeh
|
||||
|
||||
dirbuf = $900
|
||||
; note, don't put this immediately below
|
||||
; the value being read as destaddr-4
|
||||
; is temporarily overwritten during read
|
||||
; process
|
||||
|
||||
;======================
|
||||
|
||||
|
||||
|
||||
; filename to open is 30-character Apple text:
|
||||
filename:
|
||||
.byte $A0,$A0,$A0,$A0,$A0,$A0,$A0,$A0
|
||||
.byte $A0,$A0,$A0,$A0,$A0,$A0,$A0,$A0
|
||||
.byte $A0,$A0,$A0,$A0,$A0,$A0,$A0,$A0
|
||||
.byte $A0,$A0,$A0,$A0,$A0,$A0
|
||||
|
||||
;=======================================================
|
||||
;=======================================================
|
||||
;=======================================================
|
||||
;unhook DOS and build nibble table
|
||||
rts_init:
|
||||
; patch to use current drive
|
||||
|
||||
; locate input paramater list
|
||||
jsr $3E3
|
||||
; result is in A:Y
|
||||
sta $FF
|
||||
sty $FE
|
||||
ldy #1
|
||||
lda ($FE),y
|
||||
|
||||
; list+1 should have slot<<8
|
||||
|
||||
|
||||
ora #$80 ; add in $80
|
||||
|
||||
; c0e0
|
||||
sta mlsmc06+1
|
||||
|
||||
; c0e8
|
||||
clc
|
||||
adc #8
|
||||
sta mlsmc02+1
|
||||
|
||||
; c0e9
|
||||
clc
|
||||
adc #1
|
||||
sta mlsmc01+1
|
||||
|
||||
; c0ec
|
||||
clc
|
||||
adc #3
|
||||
sta mlsmc03+1
|
||||
sta mlsmc04+1
|
||||
sta mlsmc05+1
|
||||
|
||||
jsr $fe93 ; clear COUT
|
||||
jsr $fe89 ; clear KEYIN
|
||||
|
||||
;========================
|
||||
; Create nibble table
|
||||
; Note: the table starts 16 bytes in, and is sparse
|
||||
; so it doesn't entirely look like the DOS33 table at
|
||||
|
||||
ldy #0
|
||||
ldx #3
|
||||
L1: stx $3c ; store tempx (3?)
|
||||
txa ; a=x (a=3)
|
||||
asl ; a*=2 (a=6)
|
||||
bit $3c ; a&tempx, set N/V (a=6)
|
||||
beq L3 ; if 0, skip to L3
|
||||
ora $3c ; a|=tempx (a=7)
|
||||
eor #$ff ; a=~a (a=f8)
|
||||
and #$7e ; a&=0x7e 0111 1110 (a=78)
|
||||
L2: bcs L3 ; this set way back at asl??
|
||||
lsr ; a>>1 a=3c c=0
|
||||
; a=1e c=0
|
||||
; a=0f c=0
|
||||
; a=07 c=1
|
||||
bne L2 ; if a!=0 goto l2
|
||||
tya ; if a==0, a=y
|
||||
sta nibtbl, x ; write out to table
|
||||
iny ; increment y
|
||||
L3: inx ; increment x x=4, a=0f
|
||||
bpl L1 ; loop while high bit not set
|
||||
|
||||
rts
|
||||
|
||||
|
||||
;=======================================================
|
||||
;=======================================================
|
||||
;=======================================================
|
||||
|
||||
; filename in OUTL:OUTH
|
||||
|
||||
opendir_filename:
|
||||
|
||||
; clear out the filename with $A0 (space)
|
||||
|
||||
lda #<filename
|
||||
sta namlo
|
||||
lda #>filename
|
||||
sta namhi
|
||||
|
||||
ldy #29
|
||||
wipe_filename_loop:
|
||||
lda #$A0
|
||||
sta (namlo),Y
|
||||
dey
|
||||
bpl wipe_filename_loop
|
||||
|
||||
ldy #0
|
||||
copy_filename_loop:
|
||||
lda (OUTL),Y
|
||||
beq copy_filename_done
|
||||
sta (namlo),Y
|
||||
iny
|
||||
bne copy_filename_loop
|
||||
|
||||
copy_filename_done:
|
||||
|
||||
; fallthrough
|
||||
|
||||
;=======================================================
|
||||
;=======================================================
|
||||
;=======================================================
|
||||
|
||||
;===========================
|
||||
; opendir
|
||||
;===========================
|
||||
|
||||
; turn on drive and read volume table of contents
|
||||
opendir:
|
||||
mlsmc01:lda $c0e9 ; turn slot#6 drive on
|
||||
ldx #0
|
||||
stx adrlo ; zero out adrlo
|
||||
stx secsize ; zero out secsize
|
||||
lda #$11 ; a=$11 (VTOC)
|
||||
jsr readdirsec
|
||||
firstent:
|
||||
|
||||
lda dirbuf+1
|
||||
|
||||
; lock if entry not found
|
||||
entry_not_found:
|
||||
beq entry_not_found
|
||||
|
||||
; read directory sector
|
||||
|
||||
ldx dirbuf+2
|
||||
jsr seekread1
|
||||
ldy #7 ;number of directory entries in a sector
|
||||
ldx #$2b ;offset of filename in directory entry
|
||||
nextent:
|
||||
tya
|
||||
pha ; was **phy**
|
||||
txa
|
||||
pha ; was **phx**
|
||||
ldy #$1d
|
||||
|
||||
; match name backwards (slower but smaller)
|
||||
|
||||
L4:
|
||||
lda (namlo), y
|
||||
cmp dirbuf, x
|
||||
beq foundname
|
||||
pla
|
||||
|
||||
; move to next directory in this block, if possible
|
||||
|
||||
clc
|
||||
adc #$23
|
||||
tax
|
||||
pla
|
||||
tay ; was **ply**
|
||||
dey
|
||||
bne nextent
|
||||
beq firstent ; was **bra**
|
||||
|
||||
foundname:
|
||||
dex
|
||||
dey
|
||||
bpl L4
|
||||
pla
|
||||
tay ; was **ply**
|
||||
pla
|
||||
|
||||
; read track/sector list
|
||||
|
||||
lda dirbuf-32, y
|
||||
ldx dirbuf-31, y
|
||||
jsr seekread1
|
||||
|
||||
; read load offset and length info only, initially
|
||||
|
||||
lda #<filbuf
|
||||
sta adrlo
|
||||
lda #4
|
||||
sta secsize
|
||||
lda dirbuf+12
|
||||
ldx dirbuf+13
|
||||
ldy #>filbuf
|
||||
jsr seekread
|
||||
|
||||
; reduce load offset by 4, to account for offset and length
|
||||
|
||||
sec
|
||||
lda filbuf
|
||||
sbc #4
|
||||
sta adrlo
|
||||
|
||||
lda filbuf+1
|
||||
sbc #0
|
||||
sta adrhi
|
||||
|
||||
; save on stack bytes that will be overwritten by extra read
|
||||
|
||||
ldy #3
|
||||
L5:
|
||||
lda (adrlo), y
|
||||
pha
|
||||
dey
|
||||
bpl L5
|
||||
|
||||
lda adrhi
|
||||
pha
|
||||
lda adrlo
|
||||
pha
|
||||
|
||||
; increase load size by 4, to account for offst and length
|
||||
|
||||
lda filbuf+2
|
||||
sta ldsizel ; store out raw size
|
||||
|
||||
adc #3
|
||||
sta sizelo
|
||||
sta secsize
|
||||
|
||||
lda filbuf+3
|
||||
sta ldsizeh ; store out raw size
|
||||
|
||||
adc #0
|
||||
sta sizehi
|
||||
sta ldsizeh
|
||||
beq readfirst
|
||||
lda #0 ; was **stz secsize**
|
||||
sta secsize
|
||||
|
||||
readfirst:
|
||||
ldy #$0c
|
||||
|
||||
; read a file sector
|
||||
|
||||
readnext:
|
||||
tya
|
||||
pha
|
||||
lda dirbuf, y ; A = track
|
||||
ldx dirbuf+1, y ; x = sector
|
||||
jsr seekread1
|
||||
pla
|
||||
tay
|
||||
|
||||
; if low count is non-zero then we are done
|
||||
; (can happen only for partial last block)
|
||||
|
||||
lda secsize
|
||||
bne readdone
|
||||
|
||||
; continue if more than $100 bytes left
|
||||
|
||||
dec sizehi
|
||||
bne L6
|
||||
|
||||
; set read size to min(length, $100)
|
||||
|
||||
lda sizelo
|
||||
beq readdone
|
||||
sta secsize
|
||||
L6:
|
||||
inc adrhi
|
||||
iny
|
||||
iny
|
||||
bne readnext
|
||||
|
||||
; save current address for after t/s read
|
||||
|
||||
lda adrhi
|
||||
pha
|
||||
lda adrlo
|
||||
pha
|
||||
lda #0
|
||||
sta adrlo ; was **stz adrlo**
|
||||
|
||||
; read next track/sector sector
|
||||
|
||||
lda dirbuf+1
|
||||
ldx dirbuf+2
|
||||
jsr readdirsec
|
||||
clc
|
||||
|
||||
; restore current address
|
||||
readdone:
|
||||
pla
|
||||
; sta adrhi
|
||||
; pla
|
||||
sta adrlo ; code originally had this backwards
|
||||
pla
|
||||
sta adrhi
|
||||
bcc readfirst
|
||||
|
||||
mlsmc02:lda $c0e8
|
||||
|
||||
; restore from stack bytes that were overwritten by extra read
|
||||
|
||||
ldx #3
|
||||
ldy #0
|
||||
L7:
|
||||
pla
|
||||
sta (adrlo), y
|
||||
iny
|
||||
dex
|
||||
bpl L7
|
||||
rts
|
||||
|
||||
|
||||
;======================
|
||||
; readdirsec
|
||||
;======================
|
||||
; a = track?
|
||||
; x = sector?
|
||||
readdirsec:
|
||||
ldy #>dirbuf
|
||||
seekread:
|
||||
sty adrhi
|
||||
seekread1:
|
||||
sta phase
|
||||
lda sectbl, x
|
||||
sta reqsec
|
||||
jsr readadr
|
||||
|
||||
; if track does not match, then seek
|
||||
|
||||
cpx phase
|
||||
beq checksec
|
||||
jsr seek
|
||||
|
||||
|
||||
;=========================================
|
||||
; re merge in with qkumba's recent changes
|
||||
; to fix seek problem?
|
||||
;=========================================
|
||||
|
||||
; [re-]read sector
|
||||
|
||||
re_read_addr:
|
||||
jsr readadr
|
||||
checksec:
|
||||
cmp reqsec
|
||||
bne re_read_addr
|
||||
|
||||
;=========================
|
||||
; read sector data
|
||||
;=========================
|
||||
|
||||
readdata:
|
||||
jsr readd5aa
|
||||
eor #$ad ; zero A if match
|
||||
bne re_read_addr
|
||||
|
||||
L12:
|
||||
mlsmc03:ldx $c0ec ; read until valid data (high bit set)
|
||||
bpl L12
|
||||
eor nibtbl-$80, x
|
||||
sta bit2tbl-$aa, y
|
||||
iny
|
||||
bne L12
|
||||
L13:
|
||||
mlsmc04:ldx $c0ec ; read until valid data (high bit set)
|
||||
bpl L13
|
||||
eor nibtbl-$80, x
|
||||
sta (adrlo), y ; the real address
|
||||
iny
|
||||
cpy secsize
|
||||
bne L13
|
||||
ldy #0
|
||||
L14:
|
||||
ldx #$a9
|
||||
L15:
|
||||
inx
|
||||
beq L14
|
||||
lda (adrlo), y
|
||||
lsr bit2tbl-$aa, x
|
||||
rol
|
||||
lsr bit2tbl-$aa, x
|
||||
rol
|
||||
sta (adrlo), y
|
||||
iny
|
||||
cpy secsize
|
||||
bne L15
|
||||
rts
|
||||
|
||||
; no tricks here, just the regular stuff
|
||||
|
||||
;=======================
|
||||
; readaddr -- read the address field
|
||||
;=======================
|
||||
; Find address field, put track in cutrk, sector in tmpsec
|
||||
|
||||
readadr:
|
||||
jsr readd5aa
|
||||
cmp #$96
|
||||
bne readadr
|
||||
ldy #3 ; three?
|
||||
; first read volume/volume
|
||||
; then track/track
|
||||
; then sector/sector?
|
||||
adr_read_two_bytes:
|
||||
tax
|
||||
jsr readnib
|
||||
rol
|
||||
sta tmpsec
|
||||
jsr readnib
|
||||
and tmpsec
|
||||
dey
|
||||
bne adr_read_two_bytes
|
||||
rts
|
||||
|
||||
;========================
|
||||
; make sure we see the $D5 $AA pattern
|
||||
|
||||
readd5aa:
|
||||
L16:
|
||||
jsr readnib
|
||||
L17:
|
||||
cmp #$d5
|
||||
bne L16
|
||||
jsr readnib
|
||||
cmp #$aa
|
||||
bne L17
|
||||
tay ; we need Y=#$AA later
|
||||
|
||||
readnib:
|
||||
mlsmc05:lda $c0ec ; read until valid (high bit set)
|
||||
bpl readnib
|
||||
|
||||
seekret:
|
||||
rts
|
||||
|
||||
;=====================
|
||||
; SEEK
|
||||
;=====================
|
||||
; current track in X?
|
||||
; desired track in phase
|
||||
|
||||
seek:
|
||||
ldy #0
|
||||
sty step
|
||||
asl phase ; multiply by two
|
||||
txa ; current track?
|
||||
asl ; mul by two
|
||||
copy_cur:
|
||||
tax
|
||||
sta tmptrk
|
||||
sec
|
||||
sbc phase
|
||||
beq L22
|
||||
bcs L18
|
||||
eor #$ff
|
||||
inx
|
||||
bcc L19
|
||||
L18:
|
||||
sbc #1
|
||||
dex
|
||||
L19:
|
||||
cmp step
|
||||
bcc L20
|
||||
lda step
|
||||
L20:
|
||||
cmp #8
|
||||
bcs L21
|
||||
tay
|
||||
sec
|
||||
L21:
|
||||
txa
|
||||
pha
|
||||
ldx step1, y
|
||||
L22:
|
||||
php
|
||||
bne L24
|
||||
L23:
|
||||
clc
|
||||
lda tmptrk
|
||||
ldx step2, y
|
||||
L24:
|
||||
stx tmpsec
|
||||
and #3
|
||||
rol
|
||||
tax
|
||||
lsr
|
||||
mlsmc06:lda $c0e0, x
|
||||
L25:
|
||||
ldx #$12
|
||||
L26:
|
||||
dex
|
||||
bpl L26
|
||||
dec tmpsec
|
||||
bne L25
|
||||
bcs L23
|
||||
plp
|
||||
beq seekret
|
||||
pla
|
||||
inc step
|
||||
bne copy_cur
|
||||
|
||||
|
||||
step1: .byte $01, $30, $28, $24, $20, $1e, $1d, $1c
|
||||
step2: .byte $70, $2c, $26, $22, $1f, $1e, $1d, $1c
|
||||
|
||||
sectbl: .byte $00,$0d,$0b,$09,$07,$05,$03,$01,$0e,$0c,$0a,$08,$06,$04,$02,$0f
|
||||
|
||||
|
||||
; From $BA96 of DOS33
|
||||
nibtbl: .res 128 ; = *
|
||||
; .byte $00,$01,$98,$99,$02,$03,$9C,$04 ; $BA96 ; 00
|
||||
; .byte $05,$06,$A0,$A1,$A2,$A4,$A4,$A5 ; $BA9E ; 08
|
||||
; .byte $07,$08,$A8,$A9,$AA,$09,$0A,$0B ; $BAA6 ; 10
|
||||
; .byte $0C,$0D,$B0,$B1,$0E,$0F,$10,$11 ; $BAAE ; 18
|
||||
; .byte $12,$13,$B8,$14,$15,$16,$17,$18 ; $BAB6 ; 20
|
||||
; .byte $19,$1A,$C0,$C1,$C2,$C3,$C4,$C5 ; $BABE ; 28
|
||||
; .byte $C6,$C7,$C8,$C9,$CA,$1B,$CC,$1C ; $BAC6 ; 30
|
||||
; .byte $1D,$1E,$D0,$D1,$D2,$1E,$D4,$D5 ; $BACE ; 38
|
||||
; .byte $20,$21,$D8,$22,$23,$24,$25,$26 ; $BAD6 ; 40
|
||||
; .byte $27,$28,$E0,$E1,$E2,$E3,$E4,$29 ; $BADE ; 48
|
||||
; .byte $2A,$2B,$E8,$2C,$2D,$2E,$2F,$30 ; $BAE6 ; 50
|
||||
; .byte $31,$32,$F0,$F1,$33,$34,$35,$36 ; $BAEE ; 58
|
||||
; .byte $37,$38,$F8,$39,$3A,$3B,$3C,$3D ; $BAF6 ; 60
|
||||
; .byte $3E,$3F,$13,$00,$01,$02,$01,$00 ; $BAFE ; 68
|
||||
; .byte $00,$00,$00,$00,$00,$00,$00,$00
|
||||
; .byte $00,$00,$00,$00,$00,$00,$00,$00
|
||||
|
||||
|
||||
bit2tbl: .res 86 ; = nibtbl+128
|
||||
filbuf: .res 4 ; = bit2tbl+86
|
||||
;dataend = filbuf+4
|
||||
|
||||
|
|
@ -0,0 +1,60 @@
|
|||
include ../../../Makefile.inc
|
||||
|
||||
ZX02 = ~/research/6502_compression/zx02.git/build/zx02
|
||||
PNG_TO_HGR = ../../../utils/hgr-utils/png2hgr
|
||||
|
||||
all: bbl.hgr.zx02 bbl2.hgr.zx02 \
|
||||
grl.hgr.zx02 1bg.hgr.zx02 fup.hgr.zx02 witch.hgr.zx02
|
||||
|
||||
####
|
||||
|
||||
bbl.hgr.zx02: bbl.hgr
|
||||
$(ZX02) bbl.hgr bbl.hgr.zx02
|
||||
|
||||
bbl.hgr: bbl.png
|
||||
$(PNG_TO_HGR) bbl.png > bbl.hgr
|
||||
|
||||
####
|
||||
|
||||
bbl2.hgr.zx02: bbl2.hgr
|
||||
$(ZX02) bbl2.hgr bbl2.hgr.zx02
|
||||
|
||||
bbl2.hgr: bbl2.png
|
||||
$(PNG_TO_HGR) bbl2.png > bbl2.hgr
|
||||
|
||||
####
|
||||
|
||||
1bg.hgr.zx02: 1bg.hgr
|
||||
$(ZX02) 1bg.hgr 1bg.hgr.zx02
|
||||
|
||||
1bg.hgr: 1bg.png
|
||||
$(PNG_TO_HGR) 1bg.png > 1bg.hgr
|
||||
|
||||
|
||||
####
|
||||
|
||||
fup.hgr.zx02: fup.hgr
|
||||
$(ZX02) fup.hgr fup.hgr.zx02
|
||||
|
||||
fup.hgr: fup.png
|
||||
$(PNG_TO_HGR) fup.png > fup.hgr
|
||||
|
||||
####
|
||||
|
||||
witch.hgr.zx02: witch.hgr
|
||||
$(ZX02) witch.hgr witch.hgr.zx02
|
||||
|
||||
witch.hgr: witch.png
|
||||
$(PNG_TO_HGR) witch.png > witch.hgr
|
||||
|
||||
###
|
||||
|
||||
grl.hgr.zx02: grl.hgr
|
||||
$(ZX02) grl.hgr grl.hgr.zx02
|
||||
|
||||
###
|
||||
|
||||
|
||||
clean:
|
||||
rm -f *~ *.o *.lst
|
||||
|
||||
|
|
@ -0,0 +1,5 @@
|
|||
wait_until_keypress:
|
||||
lda KEYPRESS ; 4
|
||||
bpl wait_until_keypress ; 3
|
||||
bit KEYRESET ; clear the keyboard buffer
|
||||
rts ; 6
|
||||
|
|
@ -0,0 +1,200 @@
|
|||
;; Zero Page
|
||||
|
||||
FRAMEBUFFER = $00 ; $00 - $0F
|
||||
|
||||
;; LZ4 addresses
|
||||
|
||||
FLAME_STATE = $00
|
||||
FLAME1 = $01
|
||||
FLAME2 = $02
|
||||
FLAME3 = $03
|
||||
FLAME4 = $04
|
||||
FLAME5 = $05
|
||||
|
||||
|
||||
LZ4_SRC = $00
|
||||
LZ4_DST = $02
|
||||
LZ4_END = $04
|
||||
COUNT = $06
|
||||
DELTA = $08
|
||||
|
||||
;; Zero page monitor routines addresses
|
||||
|
||||
WNDLFT = $20
|
||||
WNDWDTH = $21
|
||||
WNDTOP = $22
|
||||
WNDBTM = $23
|
||||
CH = $24
|
||||
CV = $25
|
||||
GBASL = $26
|
||||
GBASH = $27
|
||||
BASL = $28
|
||||
BASH = $29
|
||||
H2 = $2C
|
||||
V2 = $2D
|
||||
MASK = $2E
|
||||
COLOR = $30
|
||||
;INVFLG = $32
|
||||
|
||||
; dos33 zero page = 26-2f, 35-38, 3e 3f 40-4d
|
||||
; overlap applesoft 67-6a,6f,70,af,b0,ca-cd,d8
|
||||
|
||||
|
||||
; DOS33: Confirmed kills $68
|
||||
|
||||
RWTSL = $60
|
||||
RWTSH = $61
|
||||
DOSBUFL = $62
|
||||
DOSBUFH = $63
|
||||
FILEML = $64
|
||||
FILEMH = $65
|
||||
|
||||
|
||||
FRAME = $60
|
||||
FRAMEH = $61
|
||||
WAITING = $62
|
||||
LETTERL = $63
|
||||
LETTERH = $64
|
||||
LETTERX = $65
|
||||
LETTERY = $66
|
||||
LETTERD = $67
|
||||
LETTER = $68
|
||||
BLARGH = $69
|
||||
|
||||
;FACTOR_I = $66
|
||||
;FACTOR_F = $67
|
||||
;DX_I = $68
|
||||
;DX_F = $69
|
||||
;SPACEX_I = $6A
|
||||
;SPACEX_F = $6B
|
||||
;CX_I = $6C
|
||||
;CX_F = $6D
|
||||
;DY_I = $6E
|
||||
;DY_F = $6F
|
||||
|
||||
|
||||
ZPOS = $78
|
||||
|
||||
REGISTER_DUMP = $70
|
||||
A_FINE_TONE = $70
|
||||
A_COARSE_TONE = $71
|
||||
B_FINE_TONE = $72
|
||||
B_COARSE_TONE = $73
|
||||
C_FINE_TONE = $74
|
||||
C_COARSE_TONE = $75
|
||||
NOISE = $76
|
||||
ENABLE = $77
|
||||
A_VOLUME = $78
|
||||
B_VOLUME = $79
|
||||
C_VOLUME = $7A
|
||||
ENVELOPE_FINE = $7B
|
||||
ENVELOPE_COARSE = $7C
|
||||
ENVELOPE_SHAPE = $7D
|
||||
|
||||
|
||||
COPY_OFFSET = $7E
|
||||
DECODER_STATE = $7F
|
||||
|
||||
|
||||
REGISTER_DUMP2 = $80
|
||||
A_FINE_TONE2 = $80
|
||||
A_COARSE_TONE2 = $81
|
||||
B_FINE_TONE2 = $82
|
||||
B_COARSE_TONE2 = $83
|
||||
C_FINE_TONE2 = $84
|
||||
C_COARSE_TONE2 = $85
|
||||
NOISE2 = $86
|
||||
ENABLE2 = $87
|
||||
A_VOLUME2 = $88
|
||||
B_VOLUME2 = $89
|
||||
C_VOLUME2 = $8A
|
||||
ENVELOPE_FINE2 = $8B
|
||||
ENVELOPE_COARS2 = $8C
|
||||
ENVELOPE_SHAPE2 = $8D
|
||||
LYRICSL = $8E
|
||||
LYRICSH = $8F
|
||||
|
||||
FRAME_COUNT = $90
|
||||
MB_VALUE = $91
|
||||
MB_ADDRL = $91
|
||||
MB_ADDRH = $92
|
||||
DONE_PLAYING = $93
|
||||
MB_CHUNK_OFFSET = $94
|
||||
MB_FRAME = $94
|
||||
MB_PATTERN = $95
|
||||
CHUNKSIZE = $95
|
||||
LZ4_DONE = $96
|
||||
DECODE_ERROR = $97
|
||||
COPY_TIME = $98
|
||||
DECOMPRESS_TIME = $99
|
||||
TIME_TAKEN = $9A
|
||||
LYRICS_ACTIVE = $9B
|
||||
;FORTYCOL = $9C
|
||||
CURSOR = $9D
|
||||
|
||||
; More zero-page addresses
|
||||
; we try not to conflict with anything DOS, MONITOR or BASIC related
|
||||
|
||||
;COLOR1 = $E0
|
||||
;COLOR2 = $E1
|
||||
;MATCH = $E2
|
||||
XX = $E3
|
||||
YY = $E4
|
||||
HGR_COLOR = $E4
|
||||
;SHIPY = $E4
|
||||
;YADD = $E5
|
||||
;LOOP = $E6
|
||||
;MEMPTRL = $E7
|
||||
;MEMPTRH = $E8
|
||||
;NAMEL = $E9
|
||||
;NAMEH = $EA
|
||||
;NAMEX = $EB
|
||||
;CHAR = $EC
|
||||
STATE = $ED
|
||||
DISP_PAGE = $ED
|
||||
DRAW_PAGE = $EE
|
||||
OFFSET = $EF
|
||||
|
||||
;FIRST = $F0
|
||||
|
||||
LASTKEY = $F1
|
||||
PADDLE_STATUS = $F2
|
||||
|
||||
SPRITETEMP = $F2
|
||||
XPOS = $F3
|
||||
YPOS = $F4
|
||||
TEMP = $FA
|
||||
TEMPY = $FB
|
||||
INL = $FC
|
||||
INH = $FD
|
||||
OUTL = $FE
|
||||
OUTH = $FF
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
; read any file slot 6 version
|
||||
; based on FASTLD6 and RTS copyright (c) Peter Ferrie 2011-2013,2018
|
||||
|
||||
; modified to assembled with ca64 -- vmw
|
||||
; added code to patch it to run from current disk slot -- vmw
|
||||
|
||||
|
||||
adrlo = $26 ; constant from boot prom
|
||||
adrhi = $27 ; constant from boot prom
|
||||
tmpsec = $3c ; constant from boot prom
|
||||
reqsec = $3d ; constant from boot prom
|
||||
sizelo = $44
|
||||
sizehi = $45
|
||||
secsize = $46
|
||||
|
||||
ldsizel = $f0
|
||||
ldsizeh = $f1
|
||||
namlo = $fb
|
||||
namhi = $fc
|
||||
step = $fd ; state for stepper motor
|
||||
tmptrk = $fe ; temporary copy of current track
|
||||
phase = $ff ; current phase for /seek
|
||||
|
||||
|
|
@ -0,0 +1,144 @@
|
|||
; De-compressor for ZX02 files
|
||||
; ----------------------------
|
||||
;
|
||||
; Decompress ZX02 data (6502 optimized format), optimized for speed and size
|
||||
; 138 bytes code, 58.0 cycles/byte in test file.
|
||||
;
|
||||
; Compress with:
|
||||
; zx02 input.bin output.zx0
|
||||
;
|
||||
; (c) 2022 DMSC
|
||||
; Code under MIT license, see LICENSE file.
|
||||
|
||||
|
||||
ZP=$80
|
||||
|
||||
offset = ZP+0
|
||||
ZX0_src = ZP+2
|
||||
ZX0_dst = ZP+4
|
||||
bitr = ZP+6
|
||||
pntr = ZP+7
|
||||
|
||||
; Initial values for offset, source, destination and bitr
|
||||
zx0_ini_block:
|
||||
.byte $00, $00, <comp_data, >comp_data, <out_addr, >out_addr, $80
|
||||
|
||||
;--------------------------------------------------
|
||||
; Decompress ZX0 data (6502 optimized format)
|
||||
|
||||
full_decomp:
|
||||
; Get initialization block
|
||||
ldy #7
|
||||
|
||||
copy_init: lda zx0_ini_block-1, y
|
||||
sta offset-1, y
|
||||
dey
|
||||
bne copy_init
|
||||
|
||||
; Decode literal: Ccopy next N bytes from compressed file
|
||||
; Elias(length) byte[1] byte[2] ... byte[N]
|
||||
decode_literal:
|
||||
jsr get_elias
|
||||
|
||||
cop0: lda (ZX0_src), y
|
||||
inc ZX0_src
|
||||
bne plus1
|
||||
inc ZX0_src+1
|
||||
plus1: sta (ZX0_dst),y
|
||||
inc ZX0_dst
|
||||
bne plus2
|
||||
inc ZX0_dst+1
|
||||
plus2: dex
|
||||
bne cop0
|
||||
|
||||
asl bitr
|
||||
bcs dzx0s_new_offset
|
||||
|
||||
; Copy from last offset (repeat N bytes from last offset)
|
||||
; Elias(length)
|
||||
jsr get_elias
|
||||
dzx0s_copy:
|
||||
lda ZX0_dst
|
||||
sbc offset ; C=0 from get_elias
|
||||
sta pntr
|
||||
lda ZX0_dst+1
|
||||
sbc offset+1
|
||||
sta pntr+1
|
||||
|
||||
cop1:
|
||||
lda (pntr), y
|
||||
inc pntr
|
||||
bne plus3
|
||||
inc pntr+1
|
||||
plus3: sta (ZX0_dst),y
|
||||
inc ZX0_dst
|
||||
bne plus4
|
||||
inc ZX0_dst+1
|
||||
plus4: dex
|
||||
bne cop1
|
||||
|
||||
asl bitr
|
||||
bcc decode_literal
|
||||
|
||||
; Copy from new offset (repeat N bytes from new offset)
|
||||
; Elias(MSB(offset)) LSB(offset) Elias(length-1)
|
||||
dzx0s_new_offset:
|
||||
; Read elias code for high part of offset
|
||||
jsr get_elias
|
||||
beq exit ; Read a 0, signals the end
|
||||
; Decrease and divide by 2
|
||||
dex
|
||||
txa
|
||||
lsr ; @
|
||||
sta offset+1
|
||||
|
||||
; Get low part of offset, a literal 7 bits
|
||||
lda (ZX0_src), y
|
||||
inc ZX0_src
|
||||
bne plus5
|
||||
inc ZX0_src+1
|
||||
plus5:
|
||||
; Divide by 2
|
||||
ror ; @
|
||||
sta offset
|
||||
|
||||
; And get the copy length.
|
||||
; Start elias reading with the bit already in carry:
|
||||
ldx #1
|
||||
jsr elias_skip1
|
||||
|
||||
inx
|
||||
bcc dzx0s_copy
|
||||
|
||||
; Read an elias-gamma interlaced code.
|
||||
; ------------------------------------
|
||||
get_elias:
|
||||
; Initialize return value to #1
|
||||
ldx #1
|
||||
bne elias_start
|
||||
|
||||
elias_get: ; Read next data bit to result
|
||||
asl bitr
|
||||
rol ; @
|
||||
tax
|
||||
|
||||
elias_start:
|
||||
; Get one bit
|
||||
asl bitr
|
||||
bne elias_skip1
|
||||
|
||||
; Read new bit from stream
|
||||
lda (ZX0_src), y
|
||||
inc ZX0_src
|
||||
bne plus6
|
||||
inc ZX0_src+1
|
||||
plus6: ;sec ; not needed, C=1 guaranteed from last bit
|
||||
rol ;@
|
||||
sta bitr
|
||||
|
||||
elias_skip1:
|
||||
txa
|
||||
bcs elias_get
|
||||
; Got ending bit, stop reading
|
||||
exit:
|
||||
rts
|
||||
Loading…
Reference in New Issue