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Utilities/!CRC/!RunImage

This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.

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Filename: Utilities/!CRC/!RunImage
Read OK:
File size: 1CBE bytes
Load address: 0000
Exec address: 0000
File contents
   10REM >!RunImage
   20REM (C)1990 PAUL VIGAY
   30REM Written by Paul Vigay
   40REM With thanks to Laurence Kirby for supplying the 32bit CRC algorhythm.
   50REM
   60REM Date started: 10th December 1990
   70REM
   80version$="1.00 (28th Dec 1990)"
   90REM Alterations
  100REM
  110task%=&4B534154
  120path$="<CRC$Path>."
  130SYS "Wimp_Initialise",200,task%,"CRC" TO ,task_handle%
  140PROCinit
  150ON ERROR PROCerror
  160REPEAT
  170  SYS "Wimp_Poll",0,pb% TO reason%
  180  CASE reason% OF
  190    WHEN 2:PROCopen_window(pb%!0)
  200    WHEN 3:w%=pb%!0:PROCclose_window(w%)
  210    WHEN 6:PROCmouseclick(pb%!0,pb%!4,pb%!8,pb%!12,pb%!16)
  220    WHEN 9:PROCmenu(pb%)
  230    WHEN 17,18:PROCmessage(pb%)
  240  ENDCASE
  250UNTIL end%
  260SYS "Wimp_CloseDown",task_handle%,task%
  270END
  280
  290DEFPROCopen_window(handle%)
  300IF handle%=-1 ENDPROC
  310pb%!0=handle%:SYS "Wimp_OpenWindow",,pb%
  320ENDPROC
  330
  340DEFPROCclose_window(handle%)
  350IF handle%=window%(2) E%=FALSE
  360!pb%=handle%:SYS "Wimp_CloseWindow",,pb%
  370ENDPROC
  380
  390DEFPROCfront(handle%)
  400IF handle%=-1 ENDPROC
  410PROCgetw(handle%)
  420PROCopen_window(handle%)
  430ENDPROC
  440
  450DEFPROCupdateicon(window%,icon%,mem_ptr%,text$)
  460pb%!0=window%:pb%!8=0:pb%!12=0
  470$mem_ptr%=text$:pb%!4=icon%
  480SYS "Wimp_SetIconState",0,pb%
  490ENDPROC
  500
  510DEFFNgetstring(A%)
  520A1%=A%
  530WHILE ?A%<>0
  540  A%+=1
  550ENDWHILE
  560?A%=13
  570=$A1%
  580
  590DEFPROCgetw(handle%)
  600!pb%=handle%
  610SYS "Wimp_GetWindowState",,pb%
  620vminx%=pb%!4:vminy%=pb%!8:vmaxx%=pb%!12:vmaxy%=pb%!16
  630scrollx%=pb%!20:scrolly%=pb%!24:bhandle%=pb%!28:flags%=pb%!32
  640bx%=vminx%-scrollx%:by%=vmaxy%-scrolly%
  650ENDPROC
  660
  670DEFPROCgeti(handle%,icon%)
  680pb%!0=handle%:pb%!4=icon%:SYS "Wimp_GetIconState",,pb%
  690ix0%=pb%!8:iy0%=pb%!12:ix1%=pb%!16:iy1%=pb%!20
  700iflags%=pb%!24:idata%=pb%+28
  710ENDPROC
  720
  730DEFPROCgetp
  740SYS "Wimp_GetPointerInfo",,pb%
  750mousex%=!pb%:mousey%=pb%!4:buttons%=pb%!8
  760window%=pb%!12:icon%=pb%!16
  770ENDPROC
  780
  790DEFFNicon_bar
  800LOCAL sp$,ih%
  810pb%!0=-1:pb%!4=0:pb%!8=0:pb%!12=68:pb%!16=68:pb%!20=&2102
  820DIM spr% 9:$spr%="!CRC"
  830pb%!24=spr%
  840pb%!28=sprites%:pb%!32=7
  850SYS "Wimp_CreateIcon",,pb% TO ih%
  860=ih%
  870
  880DEFPROCinit
  890DIM factors% 15,pixtrans% 15,pb% 256,oldpb% 256
  900PROCloadin_sprites
  910end%=FALSE
  920E%=FALSE
  930scrapref%=-1:saveref%=-1:key_pressed%=0:wkp%=0:ikp%=0:open%=FALSE
  940DIM ws% templen% :REM workspace for icons in windows
  950DIM wb% templen% :REM window block (multi-purpose)
  960DIM mb% 100:REM menu data block
  970DIM md% 50  :REM menu block containing in-directed data
  980nw%=2        :REM number of windows supported
  990DIM window%(nw%)
 1000icon%=FNicon_bar
 1010PROCload_windows
 1020PROCmenu_create
 1030buffer_size%=10000
 1040length%=0:max_length%=0:name$="":crc=0:DIM buffer% buffer_size%+10
 1050DIM code% 2000
 1060PROCmcode
 1070PROCinitpoly
 1080ENDPROC
 1090
 1100DEFPROCinitpoly
 1110LOCAL N%
 1120polynomial=&EDB88320
 1130FOR N%=0 TO 255
 1140 crctable!(4*N%)=0
 1150NEXT N%
 1160crcsum=polynomial
 1170bit%=&80
 1180REPEAT
 1190  FOR N%=0 TO &FF
 1200    IF (N% AND bit%) crctable!(4*N%)=crctable!(4*N%) EOR crcsum
 1210  NEXT N%
 1220  IF (crcsum AND 1) THEN
 1230    crcsum=(crcsum>>1)AND&7FFFFFFF
 1240    crcsum=crcsum EOR polynomial
 1250  ELSE
 1260    crcsum=(crcsum>>1)AND&7FFFFFFF
 1270  ENDIF
 1280  bit%=(bit%>>1)
 1290UNTIL bit%=0
 1300ENDPROC
 1310
 1320DEFPROCloadin_sprites
 1330LOCAL s%,t%
 1340s%=OPENIN(path$+"Templates"):templen%=EXT#s%:CLOSE#s%
 1350s%=OPENIN(path$+"Sprites"):t%=EXT#s%+16:CLOSE#s%
 1360DIM sprites% t%
 1370!sprites%=t%:sprites%!8=16
 1380SYS "OS_SpriteOp",&109,sprites%
 1390SYS "OS_SpriteOp",&10A,sprites%,path$+"Sprites"
 1400ENDPROC
 1410
 1420DEFPROCmenu_create
 1430LOCAL loop%,pass%,T$,C1%,C2%,C3%,C4%,W%,H%,V%,NI%,items%,menu2,menu3,menu4,f0%,f1%,f2%,f3%
 1440FOR pass%=0 TO 2 STEP 2
 1450  f0%=49:f1%=1:f2%=0:f3%=7
 1460  P%=mb%:indir%=md%:menu%=P%:RESTORE 1660
 1470  [ OPT pass%
 1480    EQUS "!CRC":EQUD 0:EQUD 0
 1490    EQUB 7:EQUB 2:EQUB 3:EQUB 0:EQUD 88:EQUD 44:EQUD 0
 1500  ]
 1510  FOR items%=1 TO 2
 1520    READ t$,nm%
 1530    f4%=indir%:f5%=-1:f6%=LEN(t$):$f4%=t$:indir%=indir%+f6%+1
 1540    CASE t$ OF
 1550      WHEN "Info":f%=0:nm%=window%(1)
 1560      WHEN "Quit":f%=&80
 1570    ENDCASE
 1580    [ OPT pass%
 1590      EQUD f%:EQUD nm%:EQUB f0%:EQUB f1%:EQUB f2%
 1600      EQUB f3%:EQUD f4%:EQUD f5%:EQUD f6%
 1610    ]:NEXT items%
 1620NEXT pass%
 1630ENDPROC
 1640
 1650REM data for menu 1
 1660DATA "Info",101
 1670DATA "Quit",-1
 1680
 1690DEFPROCload_windows
 1700LOCAL N%,W%,window$
 1710SYS "Wimp_OpenTemplate",,path$+"Templates"
 1720wm%=ws%+templen%
 1730RESTORE 1890
 1740FOR W%=1 TO nw%
 1750  READ window$
 1760  SYS "Wimp_LoadTemplate",,wb%,ws%,wm%,-1,window$,0 TO ,,ws%
 1770  CASE window$ OF
 1780    WHEN "info":$(wb%!(88+128+20))=version$
 1790    WHEN "main":filenamei%=(wb%!(88+(3*32)+20))
 1800                lengthi%=(wb%!(88+(4*32)+20))
 1810                crci%=(wb%!(88+(5*32)+20))
 1820                wb%!(88+(6*32)+24)=sprites%
 1830                wb%!(88+(7*32)+24)=sprites%
 1840  ENDCASE
 1850  SYS "Wimp_CreateWindow",,wb% TO window%(W%)
 1860NEXT W%
 1870SYS "Wimp_CloseTemplate"
 1880ENDPROC
 1890DATA info,main
 1900
 1910DEFPROCerror
 1920*CLOSE
 1930VDU7
 1940E%=FNerror(3,ERR,REPORT$)
 1950IF E%=2 end%=TRUE
 1960ENDPROC
 1970
 1980DEFFNerror(E%,N%,M$)
 1990SYS "Hourglass_Smash"
 2000SYS "Wimp_DragBox",,-1
 2010!pb%=N%:$(pb%+4)=M$+" at "+STR$(ERL)+CHR$(0)
 2020SYS "Wimp_ReportError",pb%,E%,"!CRC" TO ,E%
 2030=E%
 2040
 2050DEFPROCmouseclick(mousex%,mousey%,b%,w%,i%)
 2060CASE b% OF
 2070  WHEN 1,4:CASE w% OF
 2080    WHEN -2:PROCfront(window%(2))
 2090    WHEN window%(2):CASE i% OF
 2100        WHEN 6:IF name$<>"" AND length%>0 THEN
 2110                 length%-=1
 2120                 PROCupdateicon(window%(2),4,lengthi%,STR$(length%))
 2130               ENDIF
 2140        WHEN 7:IF name$<>"" AND length%<max_length% THEN
 2150                 length%+=1
 2160                 PROCupdateicon(window%(2),4,lengthi%,STR$(length%))
 2170               ENDIF
 2180        WHEN 8:IF name$<>"" THEN
 2190                 crc=FNcrc(length%)
 2200                 PROCupdateicon(window%(2),5,crci%,STR$~crc)
 2210               ENDIF
 2220      ENDCASE
 2230  ENDCASE
 2240  WHEN 2:CASE w% OF
 2250    WHEN -2:SYS "Wimp_CreateMenu",,menu%,pb%!0-56,184
 2260    ENDCASE
 2270ENDCASE
 2280ENDPROC
 2290
 2300DEFPROCmessage(pb%)
 2310LOCAL N%
 2320FOR N%=0 TO !pb%-1 STEP4:oldpb%!N%=pb%!N%:NEXT N%
 2330CASE pb%!16 OF
 2340  WHEN 0:end%=TRUE
 2350  WHEN 3:CASE pb%!20 OF
 2360           WHEN -2,window%(2):PROCfront(window%(2))
 2370                   filename$=FNgetstring(pb%+44)
 2380                   PROCload(filename$)
 2390         ENDCASE
 2400ENDCASE
 2410ENDPROC
 2420
 2430DEFPROCmenu(pb%)
 2440o%=0
 2450WHILE pb%!o%<>-1:o%+=4:ENDWHILE:n%=o%/4-1:f%=10^n%:o%=0:e%=f%
 2460WHILE pb%!o%<>-1:e%=e%+(pb%!o%)*f%:f%=f%/10:o%+=4:ENDWHILE
 2470SYS "Wimp_GetPointerInfo",,pb%
 2480b%=pb%!8
 2490IF b% THEN
 2500  CASE e% OF
 2510    WHEN 2:end%=TRUE
 2520  ENDCASE
 2530ENDIF
 2540PROCmenu_create
 2550ENDPROC
 2560
 2570DEFPROCload(filename$)
 2580LOCAL X%,n%
 2590n%=LEN(filename$)
 2600WHILE MID$(filename$,n%,1)<>"." AND n%>0:n%-=1:ENDWHILE
 2610name$=MID$(filename$,n%+1):$filename=filename$
 2620X%=OPENIN(filename$):length%=EXT#X%:CLOSE#X%
 2630max_length%=length%:crc=FNcrc(length%)
 2640PROCupdateicon(window%(2),3,filenamei%,name$)
 2650PROCupdateicon(window%(2),4,lengthi%,STR$(length%))
 2660PROCupdateicon(window%(2),5,crci%,STR$~crc)
 2670ENDPROC
 2680
 2690DEFFNcrc(length%)
 2700LOCAL crc
 2710!maxlength=length%
 2720SYS "Hourglass_On":crc=USR(calccrc):SYS "Hourglass_Off"
 2730=crc
 2740
 2750DEFPROCmcode
 2760LOCAL N%,P%,sp,link
 2770sp=13:link=14:crc=12:spare=8:length=4:maxlen=5:table=9
 2780FOR N%=0 TO 2 STEP 2
 2790P%=code%
 2800[ OPT N%
 2810.calccrc
 2820 STMFD (sp)!,{link}
 2830 MOV length,#0
 2840 ADR crc,crcseed
 2850 LDR crc,[crc]
 2860 ADR maxlen,maxlength
 2870 LDR maxlen,[maxlen]
 2880 ADR table,crctable
 2890 MOV R0,#%01001111
 2900 ADR R1,filename
 2910 SWI "OS_Find"
 2920 CMP R0,#0
 2930 BEQ exit
 2940 MOV R1,R0
 2950 .loop
 2960 SWI "OS_BGet"
 2970 BCS exit
 2980 ADD length,length,#1
 2990 CMP length,maxlen
 3000 BGT exit
 3010 AND spare,crc,#&FF
 3020 EOR spare,R0,spare
 3030 LDR spare,[table,spare, LSL #2]
 3040 EOR crc,spare,crc,LSR #8
 3050 B loop
 3060.exit
 3070 MOV R0,#0
 3080 SWI "OS_Find"
 3090 MOV R0,crc
 3100 LDMFD (sp)!,{PC}
 3110 ALIGN
 3120.crcseed
 3130 EQUD &FFFFFFFF
 3140 ALIGN
 3150.filename
 3160 EQUS STRING$(255," ")
 3170 ALIGN
 3180.maxlength
 3190 EQUD 0
 3200 ALIGN
 3210.crctable
 3220]
 3230NEXT N%
 3240ENDPROC

� >!RunImage
� (C)1990 PAUL VIGAY
� Written by Paul Vigay
(K� With thanks to Laurence Kirby for supplying the 32bit CRC algorhythm.
2�
<&� Date started: 10th December 1990
F�
P#version$="1.00 (28th Dec 1990)"
Z� Alterations
d�
ntask%=&4B534154
xpath$="<CRC$Path>."
�8ș "Wimp_Initialise",200,task%,"CRC" � ,task_handle%
�	�init
�� � �error
��
�$  ș "Wimp_Poll",0,pb% � reason%
�  Ȏ reason% �
�    � 2:�open_window(pb%!0)
�&    � 3:w%=pb%!0:�close_window(w%)
�8    � 6:�mouseclick(pb%!0,pb%!4,pb%!8,pb%!12,pb%!16)
�    � 9:�menu(pb%)
�    � 17,18:�message(pb%)
�  �
�
� end%
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�

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�.��updateicon(window%,icon%,mem_ptr%,text$)
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�

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�2� wb% templen% :� window block (multi-purpose)
�� mb% 100:� menu data block
�7� md% 50  :� menu block containing in-directed data
�/nw%=2        :� number of windows supported
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�
���menu_create
�Z� loop%,pass%,T$,C1%,C2%,C3%,C4%,W%,H%,V%,NI%,items%,menu2,menu3,menu4,f0%,f1%,f2%,f3%
�� pass%=0 � 2 � 2
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�  [ OPT pass%
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�:    EQUB 7:EQUB 2:EQUB 3:EQUB 0:EQUD 88:EQUD 44:EQUD 0
�  ]
�  � items%=1 � 2
�    � t$,nm%
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,    [ OPT pass%
65      EQUD f%:EQUD nm%:EQUB f0%:EQUB f1%:EQUB f2%
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h
r� data for menu 1
|� "Info",101
�� "Quit",-1
�
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�� N%,W%,window$
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�wm%=ws%+templen%
�
� �DbG
�� W%=1 � nw%
�  � window$
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�  Ȏ window$ �
�,    � "info":$(wb%!(88+128+20))=version$
�0    � "main":filenamei%=(wb%!(88+(3*32)+20))
1                lengthi%=(wb%!(88+(4*32)+20))
.                crci%=(wb%!(88+(5*32)+20))
/                wb%!(88+(6*32)+24)=sprites%
&/                wb%!(88+(7*32)+24)=sprites%
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:/  ș "Wimp_CreateWindow",,wb% � window%(W%)
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�
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HB                 �updateicon(window%(2),4,lengthi%,�(length%))
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�  � 2:Ȏ w% �
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	81           � -2,window%(2):�front(window%(2))
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x
�ݤcrc(length%)
�	� crc
�!maxlength=length%
�7ș "Hourglass_On":crc=�(calccrc):ș "Hourglass_Off"
�=crc
�
���mcode
�� N%,P%,sp,link
�:sp=13:link=14:crc=12:spare=8:length=4:maxlen=5:table=9
�� N%=0 � 2 � 2
�P%=code%
�[ OPT N%
�.calccrc
 STMFD (sp)!,{link}
 MOV length,#0
 ADR crc,crcseed
" LDR crc,[crc]
, ADR maxlen,maxlength
6 LDR maxlen,[maxlen]
@ ADR table,crctable
J MOV R0,#%01001111
T ADR R1,filename
^ SWI "OS_Find"
h CMP R0,#0
r
 BEQ exit
| MOV R1,R0
�
 .loop
� SWI "OS_BGet"
�
 BCS exit
� ADD length,length,#1
� CMP length,maxlen
�
 BGT exit
� � spare,crc,#&FF
� � spare,R0,spare
�$ LDR spare,[table,spare, LSL #2]
� � crc,spare,crc,LSR #8
� B loop
�	.exit
� MOV R0,#0
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00001a50  44 52 20 6d 61 78 6c 65  6e 2c 6d 61 78 6c 65 6e  |DR maxlen,maxlen|
00001a60  67 74 68 0d 0b 36 18 20  4c 44 52 20 6d 61 78 6c  |gth..6. LDR maxl|
00001a70  65 6e 2c 5b 6d 61 78 6c  65 6e 5d 0d 0b 40 17 20  |en,[maxlen]..@. |
00001a80  41 44 52 20 74 61 62 6c  65 2c 63 72 63 74 61 62  |ADR table,crctab|
00001a90  6c 65 0d 0b 4a 16 20 4d  4f 56 20 52 30 2c 23 25  |le..J. MOV R0,#%|
00001aa0  30 31 30 30 31 31 31 31  0d 0b 54 14 20 41 44 52  |01001111..T. ADR|
00001ab0  20 52 31 2c 66 69 6c 65  6e 61 6d 65 0d 0b 5e 12  | R1,filename..^.|
00001ac0  20 53 57 49 20 22 4f 53  5f 46 69 6e 64 22 0d 0b  | SWI "OS_Find"..|
00001ad0  68 0e 20 43 4d 50 20 52  30 2c 23 30 0d 0b 72 0d  |h. CMP R0,#0..r.|
00001ae0  20 42 45 51 20 65 78 69  74 0d 0b 7c 0e 20 4d 4f  | BEQ exit..|. MO|
00001af0  56 20 52 31 2c 52 30 0d  0b 86 0a 20 2e 6c 6f 6f  |V R1,R0.... .loo|
00001b00  70 0d 0b 90 12 20 53 57  49 20 22 4f 53 5f 42 47  |p.... SWI "OS_BG|
00001b10  65 74 22 0d 0b 9a 0d 20  42 43 53 20 65 78 69 74  |et".... BCS exit|
00001b20  0d 0b a4 19 20 41 44 44  20 6c 65 6e 67 74 68 2c  |.... ADD length,|
00001b30  6c 65 6e 67 74 68 2c 23  31 0d 0b ae 16 20 43 4d  |length,#1.... CM|
00001b40  50 20 6c 65 6e 67 74 68  2c 6d 61 78 6c 65 6e 0d  |P length,maxlen.|
00001b50  0b b8 0d 20 42 47 54 20  65 78 69 74 0d 0b c2 15  |... BGT exit....|
00001b60  20 80 20 73 70 61 72 65  2c 63 72 63 2c 23 26 46  | . spare,crc,#&F|
00001b70  46 0d 0b cc 15 20 82 20  73 70 61 72 65 2c 52 30  |F.... . spare,R0|
00001b80  2c 73 70 61 72 65 0d 0b  d6 24 20 4c 44 52 20 73  |,spare...$ LDR s|
00001b90  70 61 72 65 2c 5b 74 61  62 6c 65 2c 73 70 61 72  |pare,[table,spar|
00001ba0  65 2c 20 4c 53 4c 20 23  32 5d 0d 0b e0 1b 20 82  |e, LSL #2].... .|
00001bb0  20 63 72 63 2c 73 70 61  72 65 2c 63 72 63 2c 4c  | crc,spare,crc,L|
00001bc0  53 52 20 23 38 0d 0b ea  0b 20 42 20 6c 6f 6f 70  |SR #8.... B loop|
00001bd0  0d 0b f4 09 2e 65 78 69  74 0d 0b fe 0e 20 4d 4f  |.....exit.... MO|
00001be0  56 20 52 30 2c 23 30 0d  0c 08 12 20 53 57 49 20  |V R0,#0.... SWI |
00001bf0  22 4f 53 5f 46 69 6e 64  22 0d 0c 12 0f 20 4d 4f  |"OS_Find".... MO|
00001c00  56 20 52 30 2c 63 72 63  0d 0c 1c 15 20 4c 44 4d  |V R0,crc.... LDM|
00001c10  46 44 20 28 73 70 29 21  2c 7b 50 43 7d 0d 0c 26  |FD (sp)!,{PC}..&|
00001c20  0a 20 41 4c 49 47 4e 0d  0c 30 0c 2e 63 72 63 73  |. ALIGN..0..crcs|
00001c30  65 65 64 0d 0c 3a 13 20  45 51 55 44 20 26 46 46  |eed..:. EQUD &FF|
00001c40  46 46 46 46 46 46 0d 0c  44 0a 20 41 4c 49 47 4e  |FFFFFF..D. ALIGN|
00001c50  0d 0c 4e 0d 2e 66 69 6c  65 6e 61 6d 65 0d 0c 58  |..N..filename..X|
00001c60  13 20 45 51 55 53 20 c4  32 35 35 2c 22 20 22 29  |. EQUS .255," ")|
00001c70  0d 0c 62 0a 20 41 4c 49  47 4e 0d 0c 6c 0e 2e 6d  |..b. ALIGN..l..m|
00001c80  61 78 6c 65 6e 67 74 68  0d 0c 76 0b 20 45 51 55  |axlength..v. EQU|
00001c90  44 20 30 0d 0c 80 0a 20  41 4c 49 47 4e 0d 0c 8a  |D 0.... ALIGN...|
00001ca0  0d 2e 63 72 63 74 61 62  6c 65 0d 0c 94 05 5d 0d  |..crctable....].|
00001cb0  0c 9e 08 ed 20 4e 25 0d  0c a8 05 e1 0d ff        |.... N%.......|
00001cbe