mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-26 11:30:12 +00:00
xmas2019: add compressed loader
This commit is contained in:
Vince Weaver
parent
86f50cdcaa
commit
7f0290d56b
@ -7,10 +7,11 @@ PNG_TO_40x96 = ../gr-utils/png_to_40x96
|
||||
|
||||
all: xmas2019.dsk sine_table
|
||||
|
||||
xmas2019.dsk: SNOW TREE XMAS2019 LOADER HELLO
|
||||
xmas2019.dsk: SNOW TREE XMAS2019 XMAS2019_LZ4 LOADER HELLO
|
||||
cp empty.dsk xmas2019.dsk
|
||||
$(DOS33) -y xmas2019.dsk SAVE A HELLO
|
||||
$(DOS33) -y xmas2019.dsk BSAVE -a 0x4000 XMAS2019
|
||||
$(DOS33) -y xmas2019.dsk BSAVE -a 0x2000 XMAS2019_LZ4
|
||||
$(DOS33) -y xmas2019.dsk BSAVE -a 0x1000 SNOW
|
||||
$(DOS33) -y xmas2019.dsk BSAVE -a 0x1000 TREE
|
||||
$(DOS33) -y xmas2019.dsk BSAVE -a 0x800 LOADER
|
||||
@ -56,6 +57,10 @@ xmas2019.o: xmas2019.s \
|
||||
move_letters.s letters.s
|
||||
ca65 -o xmas2019.o xmas2019.s -l xmas2019.lst
|
||||
|
||||
####
|
||||
|
||||
XMAS2019_LZ4: XMAS2019
|
||||
lz4 -f -16 XMAS2019 XMAS2019_LZ4
|
||||
|
||||
#####
|
||||
|
||||
|
||||
@ -1,4 +1,11 @@
|
||||
+ FAST LOADER
|
||||
Load to HGR
|
||||
Decompress to HGR2
|
||||
|
||||
+ LZ4 Decompression (fit in 4k)
|
||||
+ Re-arrange sound playing to try to avoid glitch
|
||||
|
||||
|
||||
+ Make SINE twice as fast (64 instead of 128 entries?)
|
||||
+ rmove sine4
|
||||
+ Add snow
|
||||
+ Add music
|
||||
|
||||
|
||||
|
||||
@ -1 +1,14 @@
|
||||
10 PRINT "HELLO"
|
||||
5 HOME
|
||||
10 PRINT " LOADING XMAS-2019 FOR APPLE ]["
|
||||
20 PRINT
|
||||
30 PRINT " WILL RUN ON ANY APPLE ][ WITH 48K"
|
||||
40 PRINT
|
||||
50 PRINT " MUSIC IF MOCKINGBOARD IN SLOT#4"
|
||||
60 PRINT
|
||||
70 PRINT " USES CYCLE COUNTING AND VAPOR LOCK"
|
||||
80 PRINT " TO GENERATE UNUSUAL GRAPHICS COMBOS"
|
||||
90 PRINT
|
||||
100 PRINT" ______"
|
||||
100 PRINT" A \/\/\/ SOFTWARE PRODUCTION"
|
||||
110 PRINT
|
||||
120 PRINT CHR$(4);"BRUN LOADER"
|
||||
|
||||
@ -12,6 +12,14 @@ filbuf = $3D6 ; filbuf: .res 4 ; = bit2tbl+86
|
||||
; added code to patch it to run from current disk slot -- vmw
|
||||
|
||||
|
||||
.include "hardware.inc"
|
||||
LZ4_SRC = $00
|
||||
LZ4_DST = $02
|
||||
LZ4_END = $04
|
||||
COUNT = $06
|
||||
DELTA = $08
|
||||
|
||||
|
||||
adrlo = $26 ; constant from boot prom
|
||||
adrhi = $27 ; constant from boot prom
|
||||
tmpsec = $3c ; constant from boot prom
|
||||
@ -41,7 +49,10 @@ filbuf = $3D6 ; filbuf: .res 4 ; = bit2tbl+86
|
||||
start:
|
||||
jsr init ; unhook DOS, init nibble table
|
||||
|
||||
|
||||
bit SET_GR
|
||||
bit HIRES
|
||||
bit FULLGR
|
||||
bit PAGE0
|
||||
|
||||
clear_out_ram:
|
||||
ldx #$14
|
||||
@ -117,7 +128,7 @@ filenames_high:
|
||||
.byte >demosplash_filename
|
||||
|
||||
demosplash_filename:
|
||||
.byte "XMAS2019",0
|
||||
.byte "XMAS2019_LZ4",0
|
||||
|
||||
;unhook DOS and build nibble table
|
||||
|
||||
@ -379,7 +390,33 @@ L7:
|
||||
iny
|
||||
dex
|
||||
bpl L7
|
||||
rts
|
||||
|
||||
;=======================================
|
||||
;=======================================
|
||||
; go to our entry point
|
||||
;=======================================
|
||||
;=======================================
|
||||
|
||||
bit PAGE1 ; display as we decode
|
||||
|
||||
lda #<($2000+11)
|
||||
sta LZ4_SRC
|
||||
lda #>($2000+11)
|
||||
sta LZ4_SRC+1
|
||||
|
||||
lda #<($2000+6241+11-8)
|
||||
sta LZ4_END
|
||||
lda #>($2000+6241+11-8)
|
||||
sta LZ4_END+1
|
||||
|
||||
lda #$40 ; load to $4000
|
||||
|
||||
jsr lz4_decode
|
||||
|
||||
jmp $4000
|
||||
|
||||
|
||||
; rts
|
||||
|
||||
|
||||
;======================
|
||||
@ -780,3 +817,4 @@ sectbl: .byte $00,$0d,$0b,$09,$07,$05,$03,$01,$0e,$0c,$0a,$08,$06,$04,$02,$0f
|
||||
;filbuf: .res 4 ; = bit2tbl+86
|
||||
;dataend = filbuf+4
|
||||
|
||||
.include "lz4_decode.s"
|
||||
|
||||
207
xmas_2019/lz4_decode.s
Normal file
207
xmas_2019/lz4_decode.s
Normal file
@ -0,0 +1,207 @@
|
||||
; LZ4 data decompressor for Apple II
|
||||
|
||||
|
||||
; NOTE: this version is optimized for loading LORES graphics
|
||||
; on even page boundaries (usually $C00)
|
||||
; Don't use it for generic purposes!
|
||||
|
||||
; Code originally by Peter Ferrie (qkumba) (peter.ferrie@gmail.com)
|
||||
; "LZ4 unpacker in 143 bytes (6502 version) (2013)"
|
||||
; http://pferrie.host22.com/misc/appleii.htm
|
||||
|
||||
; For LZ4 reference see
|
||||
; https://github.com/lz4/lz4/wiki/lz4_Frame_format.md
|
||||
|
||||
|
||||
; We expect src in LZ4_SRC
|
||||
; Incoming Accumulator is page to write to
|
||||
; Size is in first 2 bytes pointed to by LZ4_SRC
|
||||
; LZ4 data should have 11 byte header stripped off beginning
|
||||
; and 8 byte checksum stripped off the end
|
||||
|
||||
;LZ4_SRC EQU $00 ; 25:10 (size=7c)
|
||||
;LZ4_DST EQU $02 ; 0c:00
|
||||
;LZ4_END EQU $04 ; 25:8c
|
||||
;COUNT EQU $06
|
||||
;DELTA EQU $08
|
||||
|
||||
|
||||
;======================
|
||||
; LZ4 decode
|
||||
;======================
|
||||
; input buffer in LZ4_SRC
|
||||
; A is destination page
|
||||
; size in first two bytes
|
||||
lz4_decode:
|
||||
sta LZ4_DST+1 ; set to page we want
|
||||
lda #0
|
||||
sta LZ4_DST
|
||||
|
||||
ldy #0
|
||||
|
||||
; calculate LZ4_END based on start and total size in
|
||||
; first two bytes
|
||||
; clc
|
||||
; lda (LZ4_SRC),Y ; size (low)
|
||||
; adc LZ4_SRC
|
||||
; sta LZ4_END
|
||||
; iny
|
||||
; lda (LZ4_SRC),Y ; size (high)
|
||||
; adc LZ4_SRC+1
|
||||
; sta LZ4_END+1
|
||||
|
||||
; skip past size
|
||||
; clc
|
||||
; lda LZ4_SRC
|
||||
; adc #2
|
||||
; sta LZ4_SRC
|
||||
; lda LZ4_SRC+1
|
||||
; adc #0
|
||||
; sta LZ4_SRC+1
|
||||
|
||||
|
||||
unpmain:
|
||||
ldy #0 ; used to index, always zero
|
||||
|
||||
parsetoken:
|
||||
jsr getsrc ; get next token
|
||||
pha ; save for later (need bottom 4 bits)
|
||||
|
||||
lsr ; number of literals in top 4 bits
|
||||
lsr ; so shift into place
|
||||
lsr
|
||||
lsr
|
||||
beq copymatches ; if zero, then no literals
|
||||
; jump ahead and copy
|
||||
|
||||
jsr buildcount ; add up all the literal sizes
|
||||
; result is in ram[count+1]-1:A
|
||||
tax ; now in ram[count+1]-1:X
|
||||
jsr docopy ; copy the literals
|
||||
|
||||
lda LZ4_SRC ; 16-bit compare
|
||||
cmp LZ4_END ; to see if we have reached the end
|
||||
lda LZ4_SRC+1
|
||||
sbc LZ4_END+1
|
||||
bcs done
|
||||
|
||||
copymatches:
|
||||
jsr getsrc ; get 16-bit delta value
|
||||
sta DELTA
|
||||
jsr getsrc
|
||||
sta DELTA+1
|
||||
|
||||
pla ; restore token
|
||||
and #$0f ; get bottom 4 bits
|
||||
; match count. 0 means 4
|
||||
; 15 means 19+, must be calculated
|
||||
|
||||
jsr buildcount ; add up count bits, in ram[count+1]-:A
|
||||
|
||||
clc
|
||||
adc #4 ; adjust count by 4 (minmatch)
|
||||
|
||||
tax ; now in ramp[count+1]-1:X
|
||||
|
||||
beq copy_no_adjust ; BUGFIX, don't increment if
|
||||
; exactly a multiple of 0x100
|
||||
bcc copy_no_adjust
|
||||
|
||||
inc COUNT+1 ; increment if we overflowed
|
||||
copy_no_adjust:
|
||||
|
||||
lda LZ4_SRC+1 ; save src on stack
|
||||
pha
|
||||
lda LZ4_SRC
|
||||
pha
|
||||
|
||||
sec ; subtract delta
|
||||
lda LZ4_DST ; from destination, make new src
|
||||
sbc DELTA
|
||||
sta LZ4_SRC
|
||||
lda LZ4_DST+1
|
||||
sbc DELTA+1
|
||||
sta LZ4_SRC+1
|
||||
|
||||
jsr docopy ; do the copy
|
||||
|
||||
pla ; restore the src
|
||||
sta LZ4_SRC
|
||||
pla
|
||||
sta LZ4_SRC+1
|
||||
|
||||
jmp parsetoken ; back to parsing tokens
|
||||
|
||||
done:
|
||||
pla
|
||||
rts
|
||||
|
||||
;=========
|
||||
; getsrc
|
||||
;=========
|
||||
; gets byte from src into A, increments pointer
|
||||
getsrc:
|
||||
lda (LZ4_SRC), Y ; get a byte from src
|
||||
inc LZ4_SRC ; increment pointer
|
||||
bne done_getsrc ; update 16-bit pointer
|
||||
inc LZ4_SRC+1 ; on 8-bit overflow
|
||||
done_getsrc:
|
||||
rts
|
||||
|
||||
;============
|
||||
; buildcount
|
||||
;============
|
||||
buildcount:
|
||||
ldx #1 ; high count starts at 1
|
||||
stx COUNT+1 ; (loops at zero?)
|
||||
cmp #$0f ; if LITERAL_COUNT < 15, we are done
|
||||
bne done_buildcount
|
||||
buildcount_loop:
|
||||
sta COUNT ; save LITERAL_COUNT (15)
|
||||
jsr getsrc ; get the next byte
|
||||
tax ; put in X
|
||||
clc
|
||||
adc COUNT ; add new byte to old value
|
||||
bcc bc_8bit_oflow ; if overflow, increment high byte
|
||||
inc COUNT+1
|
||||
bc_8bit_oflow:
|
||||
inx ; check if read value was 255
|
||||
beq buildcount_loop ; if it was, keep looping and adding
|
||||
done_buildcount:
|
||||
rts
|
||||
|
||||
;============
|
||||
; getput
|
||||
;============
|
||||
; gets a byte, then puts the byte
|
||||
getput:
|
||||
jsr getsrc
|
||||
; fallthrough to putdst
|
||||
|
||||
;=============
|
||||
; putdst
|
||||
;=============
|
||||
; store A into destination
|
||||
putdst:
|
||||
sta (LZ4_DST), Y ; store A into destination
|
||||
inc LZ4_DST ; increment 16-bit pointer
|
||||
bne putdst_end ; if overflow, increment top byte
|
||||
inc LZ4_DST+1
|
||||
putdst_end:
|
||||
rts
|
||||
|
||||
;=============================
|
||||
; docopy
|
||||
;=============================
|
||||
; copies ram[count+1]-1:X bytes
|
||||
; from src to dst
|
||||
docopy:
|
||||
|
||||
docopy_loop:
|
||||
jsr getput ; get/put byte
|
||||
dex ; decrement count
|
||||
bne docopy_loop ; if not zero, loop
|
||||
dec COUNT+1 ; if zero, decrement high byte
|
||||
bne docopy_loop ; if not zero, loop
|
||||
|
||||
rts
|
||||
@ -1,12 +1,3 @@
|
||||
sine_table4:
|
||||
.byte 23,23,23,24,24,24,24,24,25,25,25,25,25,25,26,26
|
||||
.byte 26,26,26,26,26,26,27,27,27,27,27,27,27,27,27,27
|
||||
.byte 27,27,27,27,27,27,27,27,27,27,27,26,26,26,26,26
|
||||
.byte 26,26,26,25,25,25,25,25,25,24,24,24,24,24,23,23
|
||||
.byte 23,23,23,22,22,22,22,22,21,21,21,21,21,21,20,20
|
||||
.byte 20,20,20,20,20,20,19,19,19,19,19,19,19,19,19,19
|
||||
.byte 19,19,19,19,19,19,19,19,19,19,19,20,20,20,20,20
|
||||
.byte 20,20,20,21,21,21,21,21,21,22,22,22,22,22,23,23
|
||||
sine_table5:
|
||||
.byte 23,23,23,24,24,24,24,25,25,25,25,26,26,26,26,26
|
||||
.byte 27,27,27,27,27,27,27,28,28,28,28,28,28,28,28,28
|
||||
|
||||
Loading…
Reference in New Issue
Block a user