Home » Personal collection » Acorn tapes » Electron_User » Electron_User_tape33b_acorn_eu_1992_april.wav » Q.SfEcho
Q.SfEcho
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.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
Tape/disk: | Home » Personal collection » Acorn tapes » Electron_User » Electron_User_tape33b_acorn_eu_1992_april.wav |
Filename: | Q.SfEcho |
Read OK: | ✔ |
File size: | 0C76 bytes |
Load address: | FFFF1900 |
Exec address: | FFFF801F |
Duplicates
There are 3 duplicate copies of this file in the archive:
- AEW website » mu » mu_5_25_discs_Micro_User_10_02_D-MU10_02.ssd » Q.SfEcho
- AEW website » mu » mu_Micro_User_10_02_MU10-2_B.uef » Q.SfEcho
- Personal collection » Acorn tapes » Electron_User » Electron_User_tape33a_acorn_eu_1992_april.wav » Q.SfEcho
- Personal collection » Acorn tapes » Electron_User » Electron_User_tape33b_acorn_eu_1992_april.wav » Q.SfEcho
File contents
10PRINT"BEEB BODY BUILDING COURSE" 20PRINT"Serial Sound Sampler" 30PRINT"Echo Chamber" 40PRINT:PRINT"Using Internal Sound Chip" 50PRINT"By Mike Cook" 60PRINT 70PRINT"Calculating look up table" 80V=15/LOG(255) 90P%=&900 100FOR A%=1 TO 255 110?P%=15-INT(LOG(A%)*V) 120P%=P%+1 130NEXT 140?&900=15 150MODE 1 160*KEY10 OLD|M RUN|M 170FOR PASS=0 TO 2 STEP 2 180P%=&A00 190[ 200OPT PASS 210.SETUP \ INITILISE 220SEI \ DISABLE INTERRUPTS 230LDA #&40 240LDY #0 250LDX #&30 260STA &FE6B \ ENABLE TIMER 1 270LDA #&C0 280STA &FE6E \ ENABLE INTERRUPT 290LDA #0 300STA &FE65 \ START IT OFF 310RTS 320.ECHO 330JSR SETUP:JSR INIT 340.LOOP 350LDA (&72),Y \ GET VALUE TO OUTPUT 360JSR SND1 \ OUTPUT IT 370.HOLD 380LDA &FE6D \ GET INTERRUPT FLAG 390BPL HOLD \ LOOP UNTIL TIME OUT 400STA &FE6D \ CLEAR INTERRUPT 410JSR sin 420STA (&72),Y 430INY \ MOVE POINTER ON 440BNE LOOP \ LOOP FOR ANOTHER 450INC &73 \ MOVE INPUT POINTER 460LDA &70 \ GET LIMIT 470CMP &73 \ HAS INPUT POINTER REACHED IT 480BNE LOOP \ BRANCH IF NOT 490LDX #&30 500STX &73 \ RESET IT 510JMP LOOP 520.sin \ SAMPLE IN 530LDX #10:LDA #0 540STA &FE60 \ CS AND CLOCK LOW 550.SLOOP 560LDA &FE60 \ GET DATA 570LSR A:ROL &80 \ MOVE INTO MEMORY 580LDA #2:STA &FE60 \ CLOCK HIGH 590LDA #0:STA &FE60 \ CLOCK LOW 600DEX : BNE SLOOP 610LDA #6: STA &FE60 620LDA &80 \ GET SAMPLE 630RTS 640.BACK 650JSR SETUP:JSR INIT 660.LOOPB 670LDA (&74),Y \ GET VALUE TO OUTPUT 680JSR SND1 \ OUTPUT IT 690DEC &74 \ REDUCE OUTPUT POINTER 700LDA #&FF 710CMP &74 \ TEST FOR WRAP AROUND 720BNE SKIP1 \ BRANCH IF NOT OVER PAGE 730DEC &75 \ DECREMENT PAGE 740LDA #&30 \ SEE IF IT HAS REACHED THE END 750CMP &75 760BNE SKIP1 \ BRANCH IF IT HAS NOT 770LDA &70 \ GET LIMIT 780STA &75 \ MAKE OUTPUT POINTER LIMIT 790.SKIP1 800JSR sin \ GET INPUT SAMPLE 810STA (&72),Y 820INC &72 \ MOVE ON INPUT POINTER 830BNE SKIP2 840INC &73 \ MOVE ON PAGE 850LDA &70 \ GET LIMIT 860CMP &73 \ HAS INPUT POINTER REACHED IT 870BNE SKIP2 \ BRANCH IF NOT 880LDA #&30 \ PUT POINTER BACK TO START 890STA &73 900.SKIP2 910LDA &FE6D \ GET INTERRUPT FLAG 920BPL SKIP2 \ LOOP UNTIL TIME OUT 930STA &FE6D \ CLEAR INTERRUPT 940JMP LOOPB 950.INIT \ INITILISE SOUND CHIP 960LDA #&FF:STA &FE43 970LDA #&84:JSR SND 980LDA #&00:JSR SND 990LDA #&A4:JSR SND 1000LDA #&00:JSR SND 1010LDA #&C4:JSR SND 1020LDA #&00:JSR SND 1030LDY #0 1040RTS 1050.SND 1060STA &FE4F 1070LDX #&00:STX &FE40 1080NOP:NOP:NOP:NOP:NOP:NOP 1090LDX #&08:STX &FE40 1100RTS 1110.SND1 1120TAX 1130LDA &900,X \ CONVERT TO LOG 1140ORA #&90:JSR SND 1150ORA #&20:JSR SND 1160EOR #&60:JSR SND 1170RTS 1180] 1190NEXT 1200CLS 1210PROC_INSTRUCTIONS 1220IF R%=0 THEN R%=180 1230?&FE66=R% 1240?&FE62=6 1250?&72=&00:?&74=&00 1260?&73=&30:?&75=&30 1270REPEAT 1280PROC_UPDATE 1290A$=GET$ 1300IF A$="B" THEN ?&70=F%+&30:?&75=?&70:CALL BACK 1310IF A$="E" THEN ?&70=F%+&30:CALL ECHO 1320IF A$="R" THEN INPUT"Sample Rate ",R%:?&FE66=R% 1330IF A$="L" THEN PROC_BLEN 1340UNTIL FALSE 1350DEF PROC_BLEN 1360REPEAT 1370INPUT"Buffer length in pages (1 to 80) ",L% 1380UNTIL L%>0 AND L%<81 1390IF L%=80 THEN L%=0 1400ENDPROC 1410DEF PROC_UPDATE 1420PRINT TAB(0,14) 1430PRINT "Sample rate delay :- ";R% 1440PRINT 1450 IF L%=0 THEN F%=80 ELSE F%=L% 1460PRINT "Buffer length ";F%/4;"K bytes" 1470PRINT TAB(0,20);SPC(40) 1480PRINT TAB(0,19) 1490ENDPROC 1500DEF PROC_INSTRUCTIONS 1510PRINT 1520PRINT"BEEB BODY BUILDING COURSE" 1530 PRINT"Echo Chamber" 1540PRINT:PRINT"Using Internal Sound Chip" 1550PRINT"By Mike Cook" 1560PRINT 1570PRINT"Options are:-" 1580PRINT"E - Enter the echo chamber" 1590PRINT"B - Backwards echo" 1600PRINT"R - Rate of digitising" 1610PRINT"L - Length of buffer" 1620PRINT"Break to return" 1630ENDPROC
�"BEEB BODY BUILDING COURSE" �"Serial Sound Sampler" �"Echo Chamber" ("�:�"Using Internal Sound Chip" 2�"By Mike Cook" <� F �"Calculating look up table" PV=15/�(255) ZP%=&900 d� A%=1 � 255 n?P%=15-�(�(A%)*V) xP%=P%+1 �� �?&900=15 �� 1 �*KEY10 OLD|M RUN|M �� PASS=0 � 2 � 2 �P%=&A00 �[ �OPT PASS �.SETUP \ INITILISE �SEI \ DISABLE �ERRUPTS �LDA #&40 � LDY #0 �LDX #&30 STA &FE6B \ ENABLE TIMER 1 LDA #&C0 STA &FE6E \ ENABLE �ERRUPT " LDA #0 ,STA &FE65 \ START IT � 6RTS @ .ECHO JJSR SETUP:JSR INIT T .LOOP ^ LDA (&72),Y \ � �UE � OUTPUT hJSR SND1 \ OUTPUT IT r .HOLD |LDA &FE6D \ � �ERRUPT FLAG �BPL HOLD \ LOOP � � OUT �STA &FE6D \ � �ERRUPT �JSR sin �STA (&72),Y �INY \ � POINTER � �BNE LOOP \ LOOP � ANOTHER �INC &73 \ � � POINTER �LDA &70 \ � LIMIT �&CMP &73 \ HAS � POINTER REACHED IT �BNE LOOP \ BRANCH � � �LDX #&30 �STX &73 \ RESET IT �JMP LOOP .sin \ SAMPLE IN LDX #10:LDA #0 STA &FE60 \ CS � CLOCK LOW & .SLOOP 0LDA &FE60 \ � � :LSR A:ROL &80 \ � �O MEMORY D!LDA #2:STA &FE60 \ CLOCK HIGH N LDA #0:STA &FE60 \ CLOCK LOW XDEX : BNE SLOOP bLDA #6: STA &FE60 lLDA &80 \ � SAMPLE vRTS � .BACK �JSR SETUP:JSR INIT � .LOOPB � LDA (&74),Y \ � �UE � OUTPUT �JSR SND1 \ OUTPUT IT �#DEC &74 \ REDUCE OUTPUT POINTER �LDA #&FF � CMP &74 \ TEST � WRAP AROUND �!BNE SKIP1 \ BRANCH � � OVER � �DEC &75 \ DECREMENT � �)LDA #&30 \ SEE � IT HAS REACHED THE � �CMP &75 �!BNE SKIP1 \ BRANCH � IT HAS � LDA &70 \ � LIMIT 'STA &75 \ MAKE OUTPUT POINTER LIMIT .SKIP1 JSR sin \ � � SAMPLE *STA (&72),Y 4INC &72 \ � � � POINTER > BNE SKIP2 HINC &73 \ � � � RLDA &70 \ � LIMIT \&CMP &73 \ HAS � POINTER REACHED IT fBNE SKIP2 \ BRANCH � � p'LDA #&30 \ PUT POINTER BACK � START zSTA &73 � .SKIP2 �LDA &FE6D \ � �ERRUPT FLAG �BPL SKIP2 \ LOOP � � OUT �STA &FE6D \ � �ERRUPT � JMP LOOPB �.INIT \ INITILISE � CHIP �LDA #&FF:STA &FE43 �LDA #&84:JSR SND �LDA #&00:JSR SND �LDA #&A4:JSR SND �LDA #&00:JSR SND �LDA #&C4:JSR SND �LDA #&00:JSR SND LDY #0 RTS .SND $ STA &FE4F .LDX #&00:STX &FE40 8NOP:NOP:NOP:NOP:NOP:NOP BLDX #&08:STX &FE40 LRTS V .SND1 `TAX jLDA &900,X \ CONVERT � � t�A #&90:JSR SND ~�A #&20:JSR SND �� #&60:JSR SND �RTS �] �� �� ��_INSTRUCTIONS �� R%=0 � R%=180 � ?&FE66=R% �?&FE62=6 �?&72=&00:?&74=&00 �?&73=&30:?&75=&30 �� �_UPDATE A$=� +� A$="B" � ?&70=F%+&30:?&75=?&70:� BACK !� A$="E" � ?&70=F%+&30:� ECHO (+� A$="R" � �"Sample Rate ",R%:?&FE66=R% 2� A$="L" � �_BLEN <� � F� �_BLEN P� Z+�"Buffer length in pages (1 to 80) ",L% d� L%>0 � L%<81 n� L%=80 � L%=0 x� �� �_UPDATE �� �0,14) � � "Sample rate delay :- ";R% �� � � L%=0 � F%=80 � F%=L% �%� "Buffer length ";F%/4;"K bytes" �� �0,20);�(40) �� �0,19) �� �� �_INSTRUCTIONS �� � �"BEEB BODY BUILDING COURSE" � �"Echo Chamber" "�:�"Using Internal Sound Chip" �"By Mike Cook" � "�"Options are:-" ,"�"E - Enter the echo chamber" 6�"B - Backwards echo" @�"R - Rate of digitising" J�"L - Length of buffer" T�"Break to return" ^� �
00000000 0d 00 0a 20 f1 22 42 45 45 42 20 42 4f 44 59 20 |... ."BEEB BODY | 00000010 42 55 49 4c 44 49 4e 47 20 43 4f 55 52 53 45 22 |BUILDING COURSE"| 00000020 0d 00 14 1b f1 22 53 65 72 69 61 6c 20 53 6f 75 |....."Serial Sou| 00000030 6e 64 20 53 61 6d 70 6c 65 72 22 0d 00 1e 13 f1 |nd Sampler".....| 00000040 22 45 63 68 6f 20 43 68 61 6d 62 65 72 22 0d 00 |"Echo Chamber"..| 00000050 28 22 f1 3a f1 22 55 73 69 6e 67 20 49 6e 74 65 |(".:."Using Inte| 00000060 72 6e 61 6c 20 53 6f 75 6e 64 20 43 68 69 70 22 |rnal Sound Chip"| 00000070 0d 00 32 13 f1 22 42 79 20 4d 69 6b 65 20 43 6f |..2.."By Mike Co| 00000080 6f 6b 22 0d 00 3c 05 f1 0d 00 46 20 f1 22 43 61 |ok"..<....F ."Ca| 00000090 6c 63 75 6c 61 74 69 6e 67 20 6c 6f 6f 6b 20 75 |lculating look u| 000000a0 70 20 74 61 62 6c 65 22 0d 00 50 0f 56 3d 31 35 |p table"..P.V=15| 000000b0 2f ab 28 32 35 35 29 0d 00 5a 0b 50 25 3d 26 39 |/.(255)..Z.P%=&9| 000000c0 30 30 0d 00 64 10 e3 20 41 25 3d 31 20 b8 20 32 |00..d.. A%=1 . 2| 000000d0 35 35 0d 00 6e 15 3f 50 25 3d 31 35 2d a8 28 ab |55..n.?P%=15-.(.| 000000e0 28 41 25 29 2a 56 29 0d 00 78 0b 50 25 3d 50 25 |(A%)*V)..x.P%=P%| 000000f0 2b 31 0d 00 82 05 ed 0d 00 8c 0c 3f 26 39 30 30 |+1.........?&900| 00000100 3d 31 35 0d 00 96 07 eb 20 31 0d 00 a0 16 2a 4b |=15..... 1....*K| 00000110 45 59 31 30 20 4f 4c 44 7c 4d 20 52 55 4e 7c 4d |EY10 OLD|M RUN|M| 00000120 0d 00 aa 14 e3 20 50 41 53 53 3d 30 20 b8 20 32 |..... PASS=0 . 2| 00000130 20 88 20 32 0d 00 b4 0b 50 25 3d 26 41 30 30 0d | . 2....P%=&A00.| 00000140 00 be 05 5b 0d 00 c8 0c 4f 50 54 20 50 41 53 53 |...[....OPT PASS| 00000150 0d 00 d2 16 2e 53 45 54 55 50 20 5c 20 49 4e 49 |.....SETUP \ INI| 00000160 54 49 4c 49 53 45 0d 00 dc 1a 53 45 49 20 5c 20 |TILISE....SEI \ | 00000170 44 49 53 41 42 4c 45 20 a8 45 52 52 55 50 54 53 |DISABLE .ERRUPTS| 00000180 0d 00 e6 0c 4c 44 41 20 23 26 34 30 0d 00 f0 0a |....LDA #&40....| 00000190 4c 44 59 20 23 30 0d 00 fa 0c 4c 44 58 20 23 26 |LDY #0....LDX #&| 000001a0 33 30 0d 01 04 1e 53 54 41 20 26 46 45 36 42 20 |30....STA &FE6B | 000001b0 5c 20 45 4e 41 42 4c 45 20 54 49 4d 45 52 20 31 |\ ENABLE TIMER 1| 000001c0 0d 01 0e 0c 4c 44 41 20 23 26 43 30 0d 01 18 1e |....LDA #&C0....| 000001d0 53 54 41 20 26 46 45 36 45 20 5c 20 45 4e 41 42 |STA &FE6E \ ENAB| 000001e0 4c 45 20 a8 45 52 52 55 50 54 0d 01 22 0a 4c 44 |LE .ERRUPT..".LD| 000001f0 41 20 23 30 0d 01 2c 1a 53 54 41 20 26 46 45 36 |A #0..,.STA &FE6| 00000200 35 20 5c 20 53 54 41 52 54 20 49 54 20 87 0d 01 |5 \ START IT ...| 00000210 36 07 52 54 53 0d 01 40 09 2e 45 43 48 4f 0d 01 |6.RTS..@..ECHO..| 00000220 4a 16 4a 53 52 20 53 45 54 55 50 3a 4a 53 52 20 |J.JSR SETUP:JSR | 00000230 49 4e 49 54 0d 01 54 09 2e 4c 4f 4f 50 0d 01 5e |INIT..T..LOOP..^| 00000240 20 4c 44 41 20 28 26 37 32 29 2c 59 20 5c 20 a5 | LDA (&72),Y \ .| 00000250 20 bb 55 45 20 b8 20 4f 55 54 50 55 54 0d 01 68 | .UE . OUTPUT..h| 00000260 18 4a 53 52 20 53 4e 44 31 20 5c 20 4f 55 54 50 |.JSR SND1 \ OUTP| 00000270 55 54 20 49 54 0d 01 72 09 2e 48 4f 4c 44 0d 01 |UT IT..r..HOLD..| 00000280 7c 1e 4c 44 41 20 26 46 45 36 44 20 5c 20 a5 20 ||.LDA &FE6D \ . | 00000290 a8 45 52 52 55 50 54 20 46 4c 41 47 0d 01 86 1b |.ERRUPT FLAG....| 000002a0 42 50 4c 20 48 4f 4c 44 20 5c 20 4c 4f 4f 50 20 |BPL HOLD \ LOOP | 000002b0 fd 20 91 20 4f 55 54 0d 01 90 19 53 54 41 20 26 |. . OUT....STA &| 000002c0 46 45 36 44 20 5c 20 d8 20 a8 45 52 52 55 50 54 |FE6D \ . .ERRUPT| 000002d0 0d 01 9a 0b 4a 53 52 20 73 69 6e 0d 01 a4 0f 53 |....JSR sin....S| 000002e0 54 41 20 28 26 37 32 29 2c 59 0d 01 ae 15 49 4e |TA (&72),Y....IN| 000002f0 59 20 5c 20 ec 20 50 4f 49 4e 54 45 52 20 ee 0d |Y \ . POINTER ..| 00000300 01 b8 1d 42 4e 45 20 4c 4f 4f 50 20 5c 20 4c 4f |...BNE LOOP \ LO| 00000310 4f 50 20 e3 20 41 4e 4f 54 48 45 52 0d 01 c2 19 |OP . ANOTHER....| 00000320 49 4e 43 20 26 37 33 20 5c 20 ec 20 e8 20 50 4f |INC &73 \ . . PO| 00000330 49 4e 54 45 52 0d 01 cc 15 4c 44 41 20 26 37 30 |INTER....LDA &70| 00000340 20 5c 20 a5 20 4c 49 4d 49 54 0d 01 d6 26 43 4d | \ . LIMIT...&CM| 00000350 50 20 26 37 33 20 5c 20 48 41 53 20 e8 20 50 4f |P &73 \ HAS . PO| 00000360 49 4e 54 45 52 20 52 45 41 43 48 45 44 20 49 54 |INTER REACHED IT| 00000370 0d 01 e0 19 42 4e 45 20 4c 4f 4f 50 20 5c 20 42 |....BNE LOOP \ B| 00000380 52 41 4e 43 48 20 e7 20 ac 0d 01 ea 0c 4c 44 58 |RANCH . .....LDX| 00000390 20 23 26 33 30 0d 01 f4 16 53 54 58 20 26 37 33 | #&30....STX &73| 000003a0 20 5c 20 52 45 53 45 54 20 49 54 0d 01 fe 0c 4a | \ RESET IT....J| 000003b0 4d 50 20 4c 4f 4f 50 0d 02 08 14 2e 73 69 6e 20 |MP LOOP.....sin | 000003c0 5c 20 53 41 4d 50 4c 45 20 49 4e 0d 02 12 12 4c |\ SAMPLE IN....L| 000003d0 44 58 20 23 31 30 3a 4c 44 41 20 23 30 0d 02 1c |DX #10:LDA #0...| 000003e0 1e 53 54 41 20 26 46 45 36 30 20 5c 20 43 53 20 |.STA &FE60 \ CS | 000003f0 80 20 43 4c 4f 43 4b 20 4c 4f 57 0d 02 26 0a 2e |. CLOCK LOW..&..| 00000400 53 4c 4f 4f 50 0d 02 30 13 4c 44 41 20 26 46 45 |SLOOP..0.LDA &FE| 00000410 36 30 20 5c 20 a5 20 dc 0d 02 3a 1f 4c 53 52 20 |60 \ . ...:.LSR | 00000420 41 3a 52 4f 4c 20 26 38 30 20 5c 20 ec 20 a8 4f |A:ROL &80 \ . .O| 00000430 20 4d 45 4d 4f 52 59 0d 02 44 21 4c 44 41 20 23 | MEMORY..D!LDA #| 00000440 32 3a 53 54 41 20 26 46 45 36 30 20 5c 20 43 4c |2:STA &FE60 \ CL| 00000450 4f 43 4b 20 48 49 47 48 0d 02 4e 20 4c 44 41 20 |OCK HIGH..N LDA | 00000460 23 30 3a 53 54 41 20 26 46 45 36 30 20 5c 20 43 |#0:STA &FE60 \ C| 00000470 4c 4f 43 4b 20 4c 4f 57 0d 02 58 13 44 45 58 20 |LOCK LOW..X.DEX | 00000480 3a 20 42 4e 45 20 53 4c 4f 4f 50 0d 02 62 15 4c |: BNE SLOOP..b.L| 00000490 44 41 20 23 36 3a 20 53 54 41 20 26 46 45 36 30 |DA #6: STA &FE60| 000004a0 0d 02 6c 16 4c 44 41 20 26 38 30 20 5c 20 a5 20 |..l.LDA &80 \ . | 000004b0 53 41 4d 50 4c 45 0d 02 76 07 52 54 53 0d 02 80 |SAMPLE..v.RTS...| 000004c0 09 2e 42 41 43 4b 0d 02 8a 16 4a 53 52 20 53 45 |..BACK....JSR SE| 000004d0 54 55 50 3a 4a 53 52 20 49 4e 49 54 0d 02 94 0a |TUP:JSR INIT....| 000004e0 2e 4c 4f 4f 50 42 0d 02 9e 20 4c 44 41 20 28 26 |.LOOPB... LDA (&| 000004f0 37 34 29 2c 59 20 5c 20 a5 20 bb 55 45 20 b8 20 |74),Y \ . .UE . | 00000500 4f 55 54 50 55 54 0d 02 a8 18 4a 53 52 20 53 4e |OUTPUT....JSR SN| 00000510 44 31 20 5c 20 4f 55 54 50 55 54 20 49 54 0d 02 |D1 \ OUTPUT IT..| 00000520 b2 23 44 45 43 20 26 37 34 20 5c 20 52 45 44 55 |.#DEC &74 \ REDU| 00000530 43 45 20 4f 55 54 50 55 54 20 50 4f 49 4e 54 45 |CE OUTPUT POINTE| 00000540 52 0d 02 bc 0c 4c 44 41 20 23 26 46 46 0d 02 c6 |R....LDA #&FF...| 00000550 20 43 4d 50 20 26 37 34 20 5c 20 54 45 53 54 20 | CMP &74 \ TEST | 00000560 e3 20 57 52 41 50 20 41 52 4f 55 4e 44 0d 02 d0 |. WRAP AROUND...| 00000570 21 42 4e 45 20 53 4b 49 50 31 20 5c 20 42 52 41 |!BNE SKIP1 \ BRA| 00000580 4e 43 48 20 e7 20 ac 20 4f 56 45 52 20 90 0d 02 |NCH . . OVER ...| 00000590 da 19 44 45 43 20 26 37 35 20 5c 20 44 45 43 52 |..DEC &75 \ DECR| 000005a0 45 4d 45 4e 54 20 90 0d 02 e4 29 4c 44 41 20 23 |EMENT ....)LDA #| 000005b0 26 33 30 20 5c 20 53 45 45 20 e7 20 49 54 20 48 |&30 \ SEE . IT H| 000005c0 41 53 20 52 45 41 43 48 45 44 20 54 48 45 20 e0 |AS REACHED THE .| 000005d0 0d 02 ee 0b 43 4d 50 20 26 37 35 0d 02 f8 21 42 |....CMP &75...!B| 000005e0 4e 45 20 53 4b 49 50 31 20 5c 20 42 52 41 4e 43 |NE SKIP1 \ BRANC| 000005f0 48 20 e7 20 49 54 20 48 41 53 20 ac 0d 03 02 15 |H . IT HAS .....| 00000600 4c 44 41 20 26 37 30 20 5c 20 a5 20 4c 49 4d 49 |LDA &70 \ . LIMI| 00000610 54 0d 03 0c 27 53 54 41 20 26 37 35 20 5c 20 4d |T...'STA &75 \ M| 00000620 41 4b 45 20 4f 55 54 50 55 54 20 50 4f 49 4e 54 |AKE OUTPUT POINT| 00000630 45 52 20 4c 49 4d 49 54 0d 03 16 0a 2e 53 4b 49 |ER LIMIT.....SKI| 00000640 50 31 0d 03 20 18 4a 53 52 20 73 69 6e 20 5c 20 |P1.. .JSR sin \ | 00000650 a5 20 e8 20 53 41 4d 50 4c 45 0d 03 2a 0f 53 54 |. . SAMPLE..*.ST| 00000660 41 20 28 26 37 32 29 2c 59 0d 03 34 1b 49 4e 43 |A (&72),Y..4.INC| 00000670 20 26 37 32 20 5c 20 ec 20 ee 20 e8 20 50 4f 49 | &72 \ . . . POI| 00000680 4e 54 45 52 0d 03 3e 0d 42 4e 45 20 53 4b 49 50 |NTER..>.BNE SKIP| 00000690 32 0d 03 48 13 49 4e 43 20 26 37 33 20 5c 20 ec |2..H.INC &73 \ .| 000006a0 20 ee 20 90 0d 03 52 15 4c 44 41 20 26 37 30 20 | . ...R.LDA &70 | 000006b0 5c 20 a5 20 4c 49 4d 49 54 0d 03 5c 26 43 4d 50 |\ . LIMIT..\&CMP| 000006c0 20 26 37 33 20 5c 20 48 41 53 20 e8 20 50 4f 49 | &73 \ HAS . POI| 000006d0 4e 54 45 52 20 52 45 41 43 48 45 44 20 49 54 0d |NTER REACHED IT.| 000006e0 03 66 1a 42 4e 45 20 53 4b 49 50 32 20 5c 20 42 |.f.BNE SKIP2 \ B| 000006f0 52 41 4e 43 48 20 e7 20 ac 0d 03 70 27 4c 44 41 |RANCH . ...p'LDA| 00000700 20 23 26 33 30 20 5c 20 50 55 54 20 50 4f 49 4e | #&30 \ PUT POIN| 00000710 54 45 52 20 42 41 43 4b 20 b8 20 53 54 41 52 54 |TER BACK . START| 00000720 0d 03 7a 0b 53 54 41 20 26 37 33 0d 03 84 0a 2e |..z.STA &73.....| 00000730 53 4b 49 50 32 0d 03 8e 1e 4c 44 41 20 26 46 45 |SKIP2....LDA &FE| 00000740 36 44 20 5c 20 a5 20 a8 45 52 52 55 50 54 20 46 |6D \ . .ERRUPT F| 00000750 4c 41 47 0d 03 98 1c 42 50 4c 20 53 4b 49 50 32 |LAG....BPL SKIP2| 00000760 20 5c 20 4c 4f 4f 50 20 fd 20 91 20 4f 55 54 0d | \ LOOP . . OUT.| 00000770 03 a2 19 53 54 41 20 26 46 45 36 44 20 5c 20 d8 |...STA &FE6D \ .| 00000780 20 a8 45 52 52 55 50 54 0d 03 ac 0d 4a 4d 50 20 | .ERRUPT....JMP | 00000790 4c 4f 4f 50 42 0d 03 b6 1c 2e 49 4e 49 54 20 5c |LOOPB.....INIT \| 000007a0 20 49 4e 49 54 49 4c 49 53 45 20 d4 20 43 48 49 | INITILISE . CHI| 000007b0 50 0d 03 c0 16 4c 44 41 20 23 26 46 46 3a 53 54 |P....LDA #&FF:ST| 000007c0 41 20 26 46 45 34 33 0d 03 ca 14 4c 44 41 20 23 |A &FE43....LDA #| 000007d0 26 38 34 3a 4a 53 52 20 53 4e 44 0d 03 d4 14 4c |&84:JSR SND....L| 000007e0 44 41 20 23 26 30 30 3a 4a 53 52 20 53 4e 44 0d |DA #&00:JSR SND.| 000007f0 03 de 14 4c 44 41 20 23 26 41 34 3a 4a 53 52 20 |...LDA #&A4:JSR | 00000800 53 4e 44 0d 03 e8 14 4c 44 41 20 23 26 30 30 3a |SND....LDA #&00:| 00000810 4a 53 52 20 53 4e 44 0d 03 f2 14 4c 44 41 20 23 |JSR SND....LDA #| 00000820 26 43 34 3a 4a 53 52 20 53 4e 44 0d 03 fc 14 4c |&C4:JSR SND....L| 00000830 44 41 20 23 26 30 30 3a 4a 53 52 20 53 4e 44 0d |DA #&00:JSR SND.| 00000840 04 06 0a 4c 44 59 20 23 30 0d 04 10 07 52 54 53 |...LDY #0....RTS| 00000850 0d 04 1a 08 2e 53 4e 44 0d 04 24 0d 53 54 41 20 |.....SND..$.STA | 00000860 26 46 45 34 46 0d 04 2e 16 4c 44 58 20 23 26 30 |&FE4F....LDX #&0| 00000870 30 3a 53 54 58 20 26 46 45 34 30 0d 04 38 1b 4e |0:STX &FE40..8.N| 00000880 4f 50 3a 4e 4f 50 3a 4e 4f 50 3a 4e 4f 50 3a 4e |OP:NOP:NOP:NOP:N| 00000890 4f 50 3a 4e 4f 50 0d 04 42 16 4c 44 58 20 23 26 |OP:NOP..B.LDX #&| 000008a0 30 38 3a 53 54 58 20 26 46 45 34 30 0d 04 4c 07 |08:STX &FE40..L.| 000008b0 52 54 53 0d 04 56 09 2e 53 4e 44 31 0d 04 60 07 |RTS..V..SND1..`.| 000008c0 54 41 58 0d 04 6a 1c 4c 44 41 20 26 39 30 30 2c |TAX..j.LDA &900,| 000008d0 58 20 5c 20 43 4f 4e 56 45 52 54 20 b8 20 ab 0d |X \ CONVERT . ..| 000008e0 04 74 13 84 41 20 23 26 39 30 3a 4a 53 52 20 53 |.t..A #&90:JSR S| 000008f0 4e 44 0d 04 7e 13 84 41 20 23 26 32 30 3a 4a 53 |ND..~..A #&20:JS| 00000900 52 20 53 4e 44 0d 04 88 12 82 20 23 26 36 30 3a |R SND..... #&60:| 00000910 4a 53 52 20 53 4e 44 0d 04 92 07 52 54 53 0d 04 |JSR SND....RTS..| 00000920 9c 05 5d 0d 04 a6 05 ed 0d 04 b0 05 db 0d 04 ba |..].............| 00000930 12 f2 5f 49 4e 53 54 52 55 43 54 49 4f 4e 53 0d |.._INSTRUCTIONS.| 00000940 04 c4 13 e7 20 52 25 3d 30 20 8c 20 52 25 3d 31 |.... R%=0 . R%=1| 00000950 38 30 0d 04 ce 0d 3f 26 46 45 36 36 3d 52 25 0d |80....?&FE66=R%.| 00000960 04 d8 0c 3f 26 46 45 36 32 3d 36 0d 04 e2 15 3f |...?&FE62=6....?| 00000970 26 37 32 3d 26 30 30 3a 3f 26 37 34 3d 26 30 30 |&72=&00:?&74=&00| 00000980 0d 04 ec 15 3f 26 37 33 3d 26 33 30 3a 3f 26 37 |....?&73=&30:?&7| 00000990 35 3d 26 33 30 0d 04 f6 05 f5 0d 05 00 0c f2 5f |5=&30.........._| 000009a0 55 50 44 41 54 45 0d 05 0a 08 41 24 3d be 0d 05 |UPDATE....A$=...| 000009b0 14 2b e7 20 41 24 3d 22 42 22 20 8c 20 3f 26 37 |.+. A$="B" . ?&7| 000009c0 30 3d 46 25 2b 26 33 30 3a 3f 26 37 35 3d 3f 26 |0=F%+&30:?&75=?&| 000009d0 37 30 3a d6 20 42 41 43 4b 0d 05 1e 21 e7 20 41 |70:. BACK...!. A| 000009e0 24 3d 22 45 22 20 8c 20 3f 26 37 30 3d 46 25 2b |$="E" . ?&70=F%+| 000009f0 26 33 30 3a d6 20 45 43 48 4f 0d 05 28 2b e7 20 |&30:. ECHO..(+. | 00000a00 41 24 3d 22 52 22 20 8c 20 e8 22 53 61 6d 70 6c |A$="R" . ."Sampl| 00000a10 65 20 52 61 74 65 20 22 2c 52 25 3a 3f 26 46 45 |e Rate ",R%:?&FE| 00000a20 36 36 3d 52 25 0d 05 32 15 e7 20 41 24 3d 22 4c |66=R%..2.. A$="L| 00000a30 22 20 8c 20 f2 5f 42 4c 45 4e 0d 05 3c 07 fd 20 |" . ._BLEN..<.. | 00000a40 a3 0d 05 46 0c dd 20 f2 5f 42 4c 45 4e 0d 05 50 |...F.. ._BLEN..P| 00000a50 05 f5 0d 05 5a 2b e8 22 42 75 66 66 65 72 20 6c |....Z+."Buffer l| 00000a60 65 6e 67 74 68 20 69 6e 20 70 61 67 65 73 20 28 |ength in pages (| 00000a70 31 20 74 6f 20 38 30 29 20 22 2c 4c 25 0d 05 64 |1 to 80) ",L%..d| 00000a80 12 fd 20 4c 25 3e 30 20 80 20 4c 25 3c 38 31 0d |.. L%>0 . L%<81.| 00000a90 05 6e 12 e7 20 4c 25 3d 38 30 20 8c 20 4c 25 3d |.n.. L%=80 . L%=| 00000aa0 30 0d 05 78 05 e1 0d 05 82 0e dd 20 f2 5f 55 50 |0..x....... ._UP| 00000ab0 44 41 54 45 0d 05 8c 0c f1 20 8a 30 2c 31 34 29 |DATE..... .0,14)| 00000ac0 0d 05 96 20 f1 20 22 53 61 6d 70 6c 65 20 72 61 |... . "Sample ra| 00000ad0 74 65 20 64 65 6c 61 79 20 3a 2d 20 22 3b 52 25 |te delay :- ";R%| 00000ae0 0d 05 a0 05 f1 0d 05 aa 1b 20 e7 20 4c 25 3d 30 |......... . L%=0| 00000af0 20 8c 20 46 25 3d 38 30 20 8b 20 46 25 3d 4c 25 | . F%=80 . F%=L%| 00000b00 0d 05 b4 25 f1 20 22 42 75 66 66 65 72 20 6c 65 |...%. "Buffer le| 00000b10 6e 67 74 68 20 22 3b 46 25 2f 34 3b 22 4b 20 62 |ngth ";F%/4;"K b| 00000b20 79 74 65 73 22 0d 05 be 12 f1 20 8a 30 2c 32 30 |ytes"..... .0,20| 00000b30 29 3b 89 28 34 30 29 0d 05 c8 0c f1 20 8a 30 2c |);.(40)..... .0,| 00000b40 31 39 29 0d 05 d2 05 e1 0d 05 dc 14 dd 20 f2 5f |19).......... ._| 00000b50 49 4e 53 54 52 55 43 54 49 4f 4e 53 0d 05 e6 05 |INSTRUCTIONS....| 00000b60 f1 0d 05 f0 20 f1 22 42 45 45 42 20 42 4f 44 59 |.... ."BEEB BODY| 00000b70 20 42 55 49 4c 44 49 4e 47 20 43 4f 55 52 53 45 | BUILDING COURSE| 00000b80 22 0d 05 fa 14 20 f1 22 45 63 68 6f 20 43 68 61 |".... ."Echo Cha| 00000b90 6d 62 65 72 22 0d 06 04 22 f1 3a f1 22 55 73 69 |mber"...".:."Usi| 00000ba0 6e 67 20 49 6e 74 65 72 6e 61 6c 20 53 6f 75 6e |ng Internal Soun| 00000bb0 64 20 43 68 69 70 22 0d 06 0e 13 f1 22 42 79 20 |d Chip"....."By | 00000bc0 4d 69 6b 65 20 43 6f 6f 6b 22 0d 06 18 05 f1 0d |Mike Cook"......| 00000bd0 06 22 14 f1 22 4f 70 74 69 6f 6e 73 20 61 72 65 |.".."Options are| 00000be0 3a 2d 22 0d 06 2c 22 f1 22 45 20 20 2d 20 45 6e |:-"..,"."E - En| 00000bf0 74 65 72 20 74 68 65 20 65 63 68 6f 20 63 68 61 |ter the echo cha| 00000c00 6d 62 65 72 22 0d 06 36 1a f1 22 42 20 20 2d 20 |mber"..6.."B - | 00000c10 42 61 63 6b 77 61 72 64 73 20 65 63 68 6f 22 0d |Backwards echo".| 00000c20 06 40 1e f1 22 52 20 20 2d 20 52 61 74 65 20 6f |.@.."R - Rate o| 00000c30 66 20 64 69 67 69 74 69 73 69 6e 67 22 0d 06 4a |f digitising"..J| 00000c40 1c f1 22 4c 20 20 2d 20 4c 65 6e 67 74 68 20 6f |.."L - Length o| 00000c50 66 20 62 75 66 66 65 72 22 0d 06 54 16 f1 22 42 |f buffer"..T.."B| 00000c60 72 65 61 6b 20 74 6f 20 72 65 74 75 72 6e 22 0d |reak to return".| 00000c70 06 5e 05 e1 0d ff |.^....| 00000c76