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l65/samples/vcs_mcart.l65
g012 d27e4ce8d1 Added VCS music cart sample.
2017-12-12 18:20:03 +01:00

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require'vcs'
-- change this if for some reason it fails to link
-- space for 10 song pointers
local FREESPACE = 3759-10*2
#pragma encapsulate far farcall
#pragma alias and dna
mappers.F4()
rom0.name = "core"
do
local ram = {
{ tt_timer=1 },
{ tt_cur_pat_index=2 },
{ tt_cur_note_index=2 },
{ tt_envelope_index=2 },
{ tt_cur_ins=2 },
{ tt_ptr = \(tmp) },
{ tt_song = \(tmp+2) },
{ tt_ptrtab = \(tmp+4) },
{ tt_song_ix=1 }, -- index into song_table
{ tt_song_ix_next=1 }, -- queued song to play after fade out
{ song_delay=1 }, -- fade out timer
{ cur_song_ix=1 }, -- current song index, cached
{ input_prev=1 }, -- previous SWCHA 4 MSB (player 0) value >> 1 | INPT4 MSB (fire player 0)
{ AUDC0s=1 }, { AUDC1s=1 }, { AUDF0s=1 }, { AUDF1s=1 }, { AUDV0s=1 }, { AUDV1s=1 },
{ vubars=16 },
{ tmp=30 },
{ print_txt = \(tmp+1) }, -- text pointer, can cross
{ print_line_count = \(tmp) }, -- number of lines to print
{ print_ptr = \(tmp+3) }, -- array of pointers to the characters
}
local ad = 0x80
for k,v in ipairs(ram) do
local f,t = pairs(v)
k,v = f(t)
if type(v) ~= 'function' then
_ENV[k] = ad
ad = ad + v
end
end
assert(ad <= 0x100)
for k,v in ipairs(ram) do
local f,t = pairs(v)
k,v = f(t)
if type(v) == 'function' then _ENV[k] = v() end
symbols[k] = _ENV[k]
end
end
-- 30 bytes fixed per song
TT_INSCTRLTABLE = 0
TT_INSADINDEXES = 2
TT_INSSUSTAININDEXES = 4
TT_INSRELEASEINDEXES = 6
TT_INSFREQVOLTABLE = 8
TT_PERCINDEXES = 10
TT_PERCFREQTABLE = 12
TT_PERCCTRLVOLTABLE = 14
TT_PATTERNSPEEDS = 16
TT_SEQUENCETABLE = 18
TT_PATTERNPTRLO = 20
TT_PATTERNPTRHI = 22
TT_PTR_SZ = 24
TT_GLOBAL_SPEED = 0+TT_PTR_SZ
TT_SPEED = 1+TT_PTR_SZ
TT_ODD_SPEED = 2+TT_PTR_SZ
TT_USE_FUNKTEMPO = 3+TT_PTR_SZ
TT_C0INIT = 4+TT_PTR_SZ
TT_C1INIT = 5+TT_PTR_SZ
TT_FREQ_MASK = 0b00011111
TT_INS_HOLD = 8
TT_INS_PAUSE = 16
TT_FIRST_PERC = 17
-- far calls to players to generate the stubs - the section will be stripped as it's unreferenced
location(rom0)
local sec_farstubgen = section("farstubsgen")
-- full ttt player with all possible options active, one for each rom bank but 0
for i=1,7 do
local loc = location(_ENV['rom'..i])
loc.songs_lo,loc.songs_hi = section("songs_lo"..i), section("songs_hi"..i)
local tt_fetchCurrentNote = section("tt_fetchCurrentNote"..i)
@_constructPatPtr
ldy tt_cur_pat_index,x lda (tt_ptrtab+TT_SEQUENCETABLE),y
bpl _noPatternGoto
dna #0b01111111 sta tt_cur_pat_index,x bpl _constructPatPtr
@_noPatternGoto
tay lda (tt_ptrtab+TT_PATTERNPTRLO),y sta tt_ptr lda (tt_ptrtab+TT_PATTERNPTRHI),y sta tt_ptr+1
clv
lda tt_cur_note_index,x bpl _notPrefetched
dna #0b01111111 sta tt_cur_note_index,x
bit "bit6Set"..i
@_notPrefetched
tay
lda (tt_ptr),y bne _noEndOfPattern
sta tt_cur_note_index,x
inc tt_cur_pat_index,x
bne _constructPatPtr
@_noEndOfPattern
rts
local tt_CalcInsIndex = section("tt_CalcInsIndex"..i)
lsr lsr lsr lsr lsr
tay
label("bit6Set"..i)
rts
loc.tt_tick = section("tt_tick"..i).instructions[1] -- get label table, used as index for far stubs
lda loc.songs_lo,y sta tt_song lda loc.songs_hi,y sta tt_song+1
bit tt_timer bpl _nosonginit
lda #0 sta tt_timer
ldy #TT_C0INIT lda (tt_song),y sta tt_cur_pat_index iny lda (tt_song),y sta tt_cur_pat_index+1
@_nosonginit
ldy #TT_PTR_SZ-1 @_setptrs lda (tt_song),y sta tt_ptrtab,y dey bpl _setptrs
dec tt_timer bpl _noNewNote
ldx #1
@_advanceLoop
jsr tt_fetchCurrentNote
cmp #TT_INS_PAUSE
beq _pause
bcs _newNote
adc tt_cur_ins,x sec sbc #8 sta tt_cur_ins,x
bcs _finishedNewNote
@_pause
lda tt_cur_ins,x jsr tt_CalcInsIndex
lda (tt_ptrtab+TT_INSRELEASEINDEXES),y
clc adc #1 bcc _storeADIndex
@_newNote
sta tt_cur_ins,x
cmp #TT_FREQ_MASK+1 bcs _startInstrument
tay
lda (tt_ptrtab+TT_PERCINDEXES),y
bne _storeADIndex
@_startInstrument
bvs _finishedNewNote
jsr tt_CalcInsIndex
lda (tt_ptrtab+TT_INSADINDEXES),y
@_storeADIndex
sta tt_envelope_index,x
@_finishedNewNote
inc tt_cur_note_index,x
@_sequencerNextChannel
dex
bpl _advanceLoop
ldy #TT_GLOBAL_SPEED lda (tt_song),y beq _localspeed
iny lax (tt_song),y
ldy #TT_USE_FUNKTEMPO lda (tt_song),y beq _globalnofunktempo
lda tt_cur_note_index lsr bcc _noOddFrame ldy #TT_ODD_SPEED lax (tt_song),y @_noOddFrame
@_globalnofunktempo
stx tt_timer
jmp _speeddone
@_localspeed
ldy tt_cur_pat_index lda (tt_ptrtab+TT_SEQUENCETABLE),y tay
sty tt_ptr ldy #TT_USE_FUNKTEMPO lda (tt_song),y ldy tt_ptr cmp #0 beq _localnofunktempo
lda tt_cur_note_index lsr
lda (tt_ptrtab+TT_PATTERNSPEEDS),y
bcc _evenFrame
dna #0x0f
bcs _storeFunkTempo
@_evenFrame
lsr lsr lsr lsr
@_storeFunkTempo
sta tt_timer
jmp _speeddone
@_localnofunktempo
lda (tt_ptrtab+TT_PATTERNSPEEDS),y sta tt_timer
@_speeddone
@_noNewNote
ldx #1
@_updateLoop
lda tt_cur_ins,x
beq _afterAudioUpdate
cmp #TT_FREQ_MASK+1 bcs _instrument
ldy tt_envelope_index,x
lda (tt_ptrtab+TT_PERCCTRLVOLTABLE),y beq _endOfPercussion inc tt_envelope_index,x @_endOfPercussion
sta AUDV0s,x lsr lsr lsr lsr sta AUDC0s,x
lda (tt_ptrtab+TT_PERCFREQTABLE),y
sta AUDF0s,x
bpl _afterAudioUpdate
jsr tt_fetchCurrentNote
cmp #TT_FREQ_MASK+1
bcc _afterAudioUpdate
sta tt_cur_ins,x
jsr tt_CalcInsIndex
lda (tt_ptrtab+TT_INSSUSTAININDEXES),y sta tt_envelope_index,x
asl tt_cur_note_index,x sec ror tt_cur_note_index,x
bmi _afterAudioUpdate
@_instrument
jsr tt_CalcInsIndex
lda (tt_ptrtab+TT_INSCTRLTABLE),y sta AUDC0s,x
lda tt_envelope_index,x cmp (tt_ptrtab+TT_INSRELEASEINDEXES),y bne _noEndOfSustain lda (tt_ptrtab+TT_INSSUSTAININDEXES),y @_noEndOfSustain
tay
lda (tt_ptrtab+TT_INSFREQVOLTABLE),y beq _endOfEnvelope iny @_endOfEnvelope
sty tt_envelope_index,x
sta AUDV0s,x
lsr lsr lsr lsr clc adc tt_cur_ins,x sec sbc #8
sta AUDF0s,x
@_afterAudioUpdate
dex
bpl _updateLoop
rts
section(sec_farstubgen) far loc.tt_tick
end
-- set free size in each location
location(rom0)
local songs_meta_lo,songs_meta_hi = section("songs_meta_lo"),section("songs_meta_hi")
local locsz = {}
for lix,loc in ipairs(locations) do
if loc ~= rom0 then
location(rom0)
local secmeta = section("songs"..lix.."_meta")
section(songs_meta_lo) byte_lo(secmeta)
section(songs_meta_hi) byte_hi(secmeta)
table.insert(locsz, { lix=lix, secmeta=secmeta, space=FREESPACE })
end
end
-- load all songs
local songs = {}
do
local lfs = require'lfs'
local dir = ... or lfs.currentdir()
for file in lfs.dir(dir) do
if file:sub(-4) == '.ttt' then
local song = ttt(dir .. '/' .. file)
table.insert(songs, song)
local size = 0
for _,v in pairs(song) do
if type(v) == 'table' then
if type(v[1]) == 'table' then
for _,vv in ipairs(v) do size = size + #vv end
else
size = size + #v
end
end
end
size = size + 2*#song.patterns -- pattern pointers
song.size = size + 30
song.filename = file:sub(1,-5)
end
end
end
-- place all songs
charset(" abcdefghijklmnopqrstuvwxyz", \x(x*8))
local meta = function(txt)
txt = txt:lower()
local out = {}
for i=1,#txt do
local c = string.byte(txt:sub(i,i))
if c < string.byte('a') or c > string.byte('z') then c = string.byte(' ') end
table.insert(out, string.char(c))
end
for i = 1, 12-#out do
if i&1 ~= 0 then table.insert(out, 1, ' ')
else table.insert(out, ' ')
end
end
return table.concat(out):sub(1,12)
end
local song_ids = {} -- 4 LSB: song index, 4 MSB: bank index
table.sort(songs, \a,b(a.size > b.size))
for _,song in ipairs(songs) do
table.sort(locsz, function(a,b)
if a.space == b.space then return locations[a.lix].start < locations[b.lix].start end
return a.space < b.space
end)
for _,locinfo in ipairs(locsz) do
if locinfo.space >= song.size then
locinfo.space = locinfo.space - song.size
local loc = location(locations[locinfo.lix])
local n = song.filename
song_ids[n] = locinfo.lix-2 << 4 | #loc.songs_lo.instructions-1
local s = function(str) return section(str..n) end
s("tt_InsCtrlTable") byte(song.insctrltable)
s("tt_InsADIndexes") byte(song.insadindexes)
s("tt_InsSustainIndexes") byte(song.inssustainindexes)
s("tt_InsReleaseIndexes") byte(song.insreleaseindexes)
s("tt_InsFreqVolTable") byte(song.insfreqvoltable)
s("tt_PercIndexes") byte(song.percindexes)
s("tt_PercFreqTable") byte(song.percfreqtable)
s("tt_PercCtrlVolTable") byte(song.percctrlvoltable)
local patterns = {}
for i,pattern in ipairs(song.patterns) do
table.insert(patterns, section("pattern"..n..i)) byte(pattern)
end
s("tt_PatternSpeeds") byte(song.patternspeeds)
s("tt_PatternPtrLo") byte_lo(patterns)
s("tt_PatternPtrHi") byte_hi(patterns)
s("tt_SequenceTable") byte(song.sequence[1]) byte(song.sequence[2])
s("tt_song")
local function ptr(t, v) t=t..n v=v or 0 byte_lo(\(symbols[t]-v)) byte_hi(\(symbols[t]-v)) end
ptr("tt_InsCtrlTable", 1)
ptr("tt_InsADIndexes", 1)
ptr("tt_InsSustainIndexes", 1)
ptr("tt_InsReleaseIndexes", 1)
ptr("tt_InsFreqVolTable")
ptr("tt_PercIndexes", 17)
ptr("tt_PercFreqTable", 1)
ptr("tt_PercCtrlVolTable", 1)
ptr("tt_PatternSpeeds")
ptr("tt_SequenceTable")
ptr("tt_PatternPtrLo")
ptr("tt_PatternPtrHi")
dc.b song.globalspeed and 1 or 0, song.speed-1, song.oddspeed-1, song.usefunktempo and 1 or 0
dc.b song.c0init, song.c1init
-- append song pointer to pointer table
section(loc.songs_lo) byte_lo("tt_song"..n)
section(loc.songs_hi) byte_hi("tt_song"..n)
-- rom0 data
section(locinfo.secmeta)
byte(meta(song.author))
byte(meta(song.name and #song.name>0 and song.name or song.filename))
break
end
end
end
----------------------------------------------------------------------
-- songs data
----------------------------------------------------------------------
-- sort songs by alphabetic order
local song_ixs = {}
for k in pairs(song_ids) do song_ixs[#song_ixs+1] = k end
table.sort(song_ixs)
for k,v in ipairs(song_ixs) do song_ixs[k] = song_ids[v] end
location(rom0)
@@song_table byte(song_ixs)
-- player pointers table
local song_players = {}
for i=1,7 do
table.insert(song_players, \(op_resolve(far_stubs[location(_ENV['rom'..i]).tt_tick][rom0])-1))
end
location(rom0)
@@song_players_lo byte_lo(song_players)
@@song_players_hi byte_hi(song_players)
@@song_tick
lda cur_song_ix
tax lsr lsr lsr lsr tay
lda song_players_hi,y pha lda song_players_lo,y pha
txa dna #0xf tay
rts
@@song_switch
ldy tt_song_ix_next sty tt_song_ix lda song_table,y sta cur_song_ix
lda #0x80 sta tt_timer -- request song reset from player
lda #0 ldx #8 @_resettt sta tt_timer,x dex bne _resettt
ldx #5 @_resetaud sta AUDC0s,x dex bpl _resetaud
rts
local song_norm = function()
-- clamp to valid TIA range
lda AUDC0s dna #0x0f sta AUDC0s lda AUDC1s dna #0x0f sta AUDC1s
lda AUDF0s dna #0x1f sta AUDF0s lda AUDF1s dna #0x1f sta AUDF1s
lda AUDV0s dna #0x0f sta AUDV0s lda AUDV1s dna #0x0f sta AUDV1s
end
@volmul for x=0,255 do dc.b math.floor(15*(((x/16)/16)*((x%16)/15))) end
local song_transition = function()
lda song_delay beq _transdone bpl _transapply
inc song_delay bne _noswitch
jsr song_switch jmp _transdone
@_noswitch
lda song_delay eor #0xff sec adc #0
@_transapply
asl asl asl dna #0xf0 ora AUDV0s tay ldx volmul,y stx AUDV0s
dna #0xf0 ora AUDV1s tay ldx volmul,y stx AUDV1s
@_transdone
-- set result
ldx #5 @_setaud lda AUDC0s,x sta AUDC0,x dex bpl _setaud
end
----------------------------------------------------------------------
-- display song name and author
----------------------------------------------------------------------
section{ "font", align=256 } dc.b
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,-- <SPC>
0x18,0x3c,0x66,0x7e,0x66,0x66,0x66,0x00,-- A
0x7c,0x66,0x66,0x7c,0x66,0x66,0x7c,0x00,-- B
0x3c,0x66,0x60,0x60,0x60,0x66,0x3c,0x00,-- C
0x78,0x6c,0x66,0x66,0x66,0x6c,0x78,0x00,-- D
0x7e,0x60,0x60,0x78,0x60,0x60,0x7e,0x00,-- E
0x7e,0x60,0x60,0x78,0x60,0x60,0x60,0x00,-- F
0x3c,0x66,0x60,0x6e,0x66,0x66,0x3c,0x00,-- G
0x66,0x66,0x66,0x7e,0x66,0x66,0x66,0x00,-- H
0x3c,0x18,0x18,0x18,0x18,0x18,0x3c,0x00,-- I
0x1e,0x0c,0x0c,0x0c,0x0c,0x6c,0x38,0x00,-- J
0x66,0x6c,0x78,0x70,0x78,0x6c,0x66,0x00,-- K
0x60,0x60,0x60,0x60,0x60,0x60,0x7e,0x00,-- L
0x63,0x77,0x7f,0x6b,0x63,0x63,0x63,0x00,-- M
0x66,0x76,0x7e,0x7e,0x6e,0x66,0x66,0x00,-- N
0x3c,0x66,0x66,0x66,0x66,0x66,0x3c,0x00,-- O
0x7c,0x66,0x66,0x7c,0x60,0x60,0x60,0x00,-- P
0x3c,0x66,0x66,0x66,0x66,0x3c,0x0e,0x00,-- Q
0x7c,0x66,0x66,0x7c,0x78,0x6c,0x66,0x00,-- R
0x3c,0x66,0x60,0x3c,0x06,0x66,0x3c,0x00,-- S
0x7e,0x18,0x18,0x18,0x18,0x18,0x18,0x00,-- T
0x66,0x66,0x66,0x66,0x66,0x66,0x3c,0x00,-- U
0x66,0x66,0x66,0x66,0x66,0x3c,0x18,0x00,-- V
0x63,0x63,0x63,0x6b,0x7f,0x77,0x63,0x00,-- W
0x66,0x66,0x3c,0x18,0x3c,0x66,0x66,0x00,-- X
0x66,0x66,0x66,0x3c,0x18,0x18,0x18,0x00,-- Y
0x7e,0x06,0x0c,0x18,0x30,0x60,0x7e,0x00 -- Z
-- a = line count
@@print12
sta print_line_count
lda#6 sta NUSIZ0 sta NUSIZ1
-- set MSB of font character addresses
lda#font>>8 ldx#23 @_loadfont sta print_ptr,x dex dex bpl _loadfont
-- position sprites
samepage
sta WSYNC
ldx#6 @_delay dex bne _delay
sta RESP0 nop sta RESP1 lda#0x70 sta HMP0 lda#0x60 sta HMP1 sta WSYNC sta HMOVE
end
@_loop
-- load text line
ldx#0 ldy#0 @_loadline lda (print_txt),y sta print_ptr,x inx inx iny cpy#12 bne _loadline
lda#0x80 sta HMP0 sta HMP1
ldy#0 samepage @_printline
sta WSYNC sta HMOVE
-- first scanline
lda (print_ptr+2),y sta GRP0 lda (print_ptr+6),y sta GRP1
lda (print_ptr+22),y tax sleep(6)
lda (print_ptr+10),y sta GRP0 lda (print_ptr+14),y sta GRP1 lda (print_ptr+18),y sta GRP0 stx GRP1
sta HMCLR sleep(8) sta HMOVE
-- second scanline
lda (print_ptr),y sta GRP0 lda (print_ptr+4),y sta GRP1
lda (print_ptr+20),y tax lda#0x80 sta HMP0 sta HMP1 nop
lda (print_ptr+8),y sta GRP0 lda (print_ptr+12),y sta GRP1 lda (print_ptr+16),y sta GRP0 stx GRP1
iny cpy#8 bne _printline
end
dec print_line_count beq _end
lda print_txt clc adc#12 sta print_txt lda print_txt+1 adc#0 sta print_txt+1
jmp _loop
@_end
lda#0 sta GRP0 sta GRP1
rts
----------------------------------------------------------------------
-- equalizer anim
----------------------------------------------------------------------
-- convert to freq: http://atariage.com/forums/topic/257526-musicsound-programming-question-atari-2600/
-- maps AUDCi to 0-7 3 bits (<<5) value for wave length of: 1, 2, 6, 15, 31, 93, 465, 511
@@wavlen samepage
dc.b 0x00,0x60,0xC0,0xC0,0x20,0x20,0x80,0x80,
0xF0,0x80,0x80,0x00,0x40,0x40,0xA0,0xA0
end
local wavelen_map = { 1, 2, 6, 15, 31, 93, 465, 511 }
local freq_ranges = { 30, 60, 120, 240, 480, 960, 1920, 9999999 }
local t = {}
for i=0,255 do
local wavelen = wavelen_map[(i>>5)+1]
local note = (i&31)+1
local freq = 3546894 / 114 / wavelen / note
for x=1,9 do
if freq <= freq_ranges[x] then
t[#t+1] = x-1
break
end
end
end
section{'regfreq', align=256} byte(t)
@@vm_pf2 samepage
dc.b 0x00,0x80,0xC0,0xE0,0xF0,0xF8,0xFC,0xFE,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF
end
@@vm_pf1 samepage
dc.b 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x01,0x03,0x07,0x0F,0x1F,0x3F,0x7F
end
@@vm_col samepage
dc.b 0x3C,0x7C,0x9C,0xDC,0x2C,0x4C,0x6C,0xAC
end
local vumeter_tick = function()
lda #0 ldy #15 @_vudec ldx vubars,y dex bmi _vudecskip stx vubars,y @_vudecskip dey bpl _vudec
lda AUDF0s ldy AUDC0s ora wavlen,y tax ldy regfreq,x
lda AUDV0s cmp vubars,y bcc _vuless0 sta vubars,y @_vuless0
lda AUDF1s ldy AUDC1s ora wavlen,y tax ldy regfreq,x
lda AUDV1s cmp vubars+8,y bcc _vuless1 sta vubars+8,y @_vuless1
end
local vumeter_draw = function()
lda #ctrlpf.PF_MIRRORED sta CTRLPF
ldy #7
@_vudraw
samepage
lda #16 sta tmp
@_vudraw1
sta WSYNC
lda vm_col,y sta COLUPF sleep(4)
ldx vubars,y
lda vm_pf1,x sta PF1
lda vm_pf2,x sta PF2
sleep(8)
ldx vubars+8,y
lda vm_pf2,x sta PF2
lda vm_pf1,x sta PF1
dec tmp bpl _vudraw1
sta WSYNC lda #0 sta PF2 sta PF1
sta WSYNC
dey bpl _vudraw
end
lda #0 sta CTRLPF
sta WSYNC sta WSYNC
end
@@song_count dc.b #songs
local next_song = function()
inc tt_song_ix_next lda song_count cmp tt_song_ix_next bne _nextsongdone lda#0 sta tt_song_ix_next @_nextsongdone
end
local prev_song = function()
dec tt_song_ix_next bpl _prevsongdone lda song_count sta tt_song_ix_next dec tt_song_ix_next @_prevsongdone
end
local check_input = function()
local JOYSTICK_RIGHT= 0x80
local JOYSTICK_LEFT = 0x40
lda SWCHA cmp input_prev beq _inputend
sta input_prev
lda #JOYSTICK_RIGHT bit input_prev bne _noright next_song() jmp _inputdone @_noright
lda #JOYSTICK_LEFT bit input_prev bne _inputdone prev_song()
@_inputdone
lda #0xe0 sta song_delay
@_inputend
end
local tick = function()
jsr song_tick
song_norm()
song_transition()
vumeter_tick()
end
@@mul24 for x=0,9 do byte(x*24) end
local kernel = function()
lda#0x8a sta COLUP0 sta COLUP1
lda cur_song_ix tax lsr lsr lsr lsr tay
lda songs_meta_lo,y sta print_txt lda songs_meta_hi,y sta print_txt+1
txa dna #0xf tay lda mul24,y clc adc print_txt sta print_txt lda print_txt+1 adc #0 sta print_txt+1
lda#1 jsr print12
vumeter_draw()
lda#0xaa sta COLUP0 sta COLUP1
lda print_txt clc adc #12 sta print_txt lda print_txt+1 adc #0 sta print_txt+1
lda#1 jsr print12
end
@@main
init()
lda SWCHA sta input_prev
jsr song_switch
@_frame
overscan(check_input) vblank(tick) screen(kernel) jmp _frame
; -- needed if last instruction is implied
writebin(filename..'.bin')
writesym(filename..'.sym')
print(stats)
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