Home » Archimedes archive » Zipped Apps » BBC Tape » !BBCTape/BBCLDiscBT
!BBCTape/BBCLDiscBT
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 » Archimedes archive » Zipped Apps » BBC Tape |
Filename: | !BBCTape/BBCLDiscBT |
Read OK: | ✔ |
File size: | 1824 bytes |
Load address: | 0000 |
Exec address: | 0000 |
File contents
MODE 7 20REM 30REM BBC end of !BBCTape application 40REM 50REM (C) S. Burke, 26/2/91 60REM 70REM The next few lines define where the buffers are, where the 80REM code goes and where the file loads to. 90REM 100REM This version might work with discs, but I can't test it! 110REM It fits in pages B and C with 0 bytes spare! 120REM 130: 140name = &0B00 150name_high = &0B 160name_low = &00 170block = &0B10 180block_high = &0B 190block_low = &10 200code_start = &0B30 210load_page = PAGE DIV &100 220: 230osfind = &FFCE 240osbget = &FFD7 250osfile = &FFDD :REM Page 335 of the Advanced User Guide is wrong! 260osbyte = &FFF4 270: 280FOR opt%=0 TO 3 STEP 3 290P% = code_start 300[OPT opt% 310.go 320LDX #0 330LDA #2 340JSR osbyte \ disable RS423 350LDX #0 360LDA #15 370JSR osbyte \ flush all buffers 380LDX #2 390TXA 400JSR osbyte \ enable RS423 receive 410.mainloop 420LDA #&0D 430STA name \ null name 440JSR handshake 450: 460JSR get \ get command 470CPY #&C0 480BEQ end \ quit 490: 500CPY #&30 510BNE load 520JSR put_ok \ confirm command 530JSR get_name \ get filename 540JSR handshake 550JSR get 560.load 570CPY #&0C 580BNE load_byte 590JSR put_ok \ confirm command 600JSR load_file 610JSR send_file 620JMP mainloop 630.load_byte 640CPY #&03 650BNE command_error 660JSR put_ok \ confirm command 670JSR load_file 680JSR send_file 690JMP mainloop 700.command_error 710LDA #0 720JSR put \ command error 730JMP mainloop 740.end 750RTS 760.load_file 770LDA #name_low \ set up parameter block 780STA block 790LDA #name_high 800STA block+1 810LDA #0 820STA block+2 830STA block+6 840LDA #load_page 850STA block+3 860LDA #&FF 870STA block+4 880STA block+5 890LDX #block_low 900LDY #block_high 910JSR osfile \ load file 920LDA block+10 930STA &71 940LDA block+11 950STA &72 \ put file length in &71, &72 960JSR read_load_exec\ get load/exec address and name 970.read_name 980LDX #&FF 990.nameloop 1000INX 1010CPX #&C 1020BEQ too_far 1030\ LDA &3B2,X ! pull filename out of cassette workspace 1040LDA #0 \ don't know where to get it for a disc system 1050STA name,X \ see AUG p. 279 1060BNE nameloop 1070.too_far 1080LDA #&0D 1090STA name,X 1100RTS 1110.get_name 1120LDX #&FF 1130STX &81 \ "get" corrupts registers 1140.get_char 1150CPX #&B 1160BEQ too_far 1170JSR get \ get filename from Arc 1180TYA 1190INC &81 1200LDX &81 1210STA name,X 1220CMP #&0D 1230BNE get_char 1240RTS 1250.read_load_exec 1260LDX #8 1270.load_exec_loop 1280LDA &3BD,X \ load/exec address from cassette workspace 1290STA &81,X 1300DEX 1310BNE load_exec_loop 1320RTS 1330.handshake 1340LDA #ASC("S") 1350JSR put 1360LDA #ASC("B") 1370JSR put \ send "SB" ... 1380JSR get 1390CPY #ASC("s") 1400BNE handshake 1410JSR get 1420CPY #ASC("b") 1430BNE handshake \ ... and receive "sb" to handshake 1440RTS 1450.send_file 1460LDA &71 1470JSR put 1480LDA &72 1490JSR put \ send file length 1500: 1510LDA #load_page 1520STA &74 1530LDA #0 1540STA &73 \ reset load address 1550DEC &72 \ need this for test below 1560BMI last_block \ file length < 256 bytes? 1570STA &80 \ block length = 0 ( = 256) 1580.send_block 1590JSR put_ok \ not eof 1600LDA #3 \ send length 3 times 1610STA &76 \ use CRC low byte as counter 1620.lenout 1630LDA &80 1640JSR put \ output block length 1650DEC &76 1660BNE lenout \ CRC low byte zero at exit 1670LDY #0 1680STY &75 \ initialise CRC high byte 1690.send_byte 1700STY &70 \ save offset 1710LDA (&73),Y \ load next byte ... 1720PHA 1730JSR put 1740PLA \ get character back 1750JSR crc \ update crc 1760LDY &70 1770INY \ increment offset 1780CPY &80 1790BNE send_byte \ end of block? 1800: 1810LDA &75 1820JSR put \ output CRC high byte 1830LDA &76 1840JSR put \ output CRC low byte 1850: 1860JSR get \ look for confirmation 1870TYA 1880BEQ send_block \ zero means error, so do again 1890: 1900INC &74 \ increment address high byte 1910DEC &72 \ decrement length high byte 1920BPL send_block \ are we finished? 1930.last_block 1940LDY #0 1950LDA &71 \ length of last block 1960STY &71 \ set length to zero 1970STA &80 1980BNE send_block \ output if non-zero 1990LDA #0 2000JSR put \ zero marks eof 2010JSR put_load_exec \ send the load/exec adress 2020.put_name \ fall through to put_name ... 2030LDX #&FF 2040STX &81 \ "put" corrupts registers 2050.put_char \ output file name 2060INC &81 2070LDX &81 2080LDA name,X 2090PHA 2100JSR put 2110PLA 2120CMP #&0D 2130BNE put_char 2140RTS 2150.put_load_exec \ put out load/exec address 2160LDX #0 2170STX &81 \ "put" corrupts registers 2180.put_load_exec_loop 2190LDA &82,X 2200JSR put 2210INC &81 2220LDX &81 2230CPX #8 2240BNE put_load_exec_loop 2250RTS 2260.put_ok 2270LDA #&FF 2280.put 2290PHA \ save value to output 2300JSR escape 2310LDX #&FD 2320LDA #&80 2330JSR osbyte \ get # empty bytes in RS423 output buffer 2340CPX #9 2350PLA 2360BCC put \ if < 9 bytes remain, wait ... 2370: 2380LDX #2 2390TAY 2400LDA #&8A 2410JMP osbyte \ ... and send it 2420.get 2430JSR escape 2440LDX #1 2450LDA #&91 2460JSR osbyte \ read a byte 2470BCS get 2480RTS 2490.crc 2500EOR &75 \ calculate CRC in &75, &76 2510STA &75 \ algorithm from Advanced User Guide 2520LDX #8 \ I hope it's right! 2530.crc_loop 2540LDA &75 2550ROL A 2560BCC b7z 2570LDA &75 2580EOR #8 2590STA &75 2600LDA &76 2610EOR #&10 2620STA &76 2630.b7z 2640ROL &76 2650ROL &75 2660DEX 2670BNE crc_loop 2680RTS 2690.escape 2700LDA &FF 2710BMI error 2720RTS 2730.error 2740LDA #&7E 2750JSR osbyte \ acknowledge escape 2760LDX #0 2770LDY #0 2780LDA #0 2790JSR &FFCE \ close all files 2800BRK 2810] 2820?P% = &11 2830P% = P% + 1 2840$P% = "Escape" + CHR$0 2850NEXT opt% *OPT 1,2 RUN CALL go
00000000 4d 4f 44 45 20 37 0d 32 30 52 45 4d 0d 33 30 52 |MODE 7.20REM.30R| 00000010 45 4d 20 42 42 43 20 65 6e 64 20 6f 66 20 21 42 |EM BBC end of !B| 00000020 42 43 54 61 70 65 20 61 70 70 6c 69 63 61 74 69 |BCTape applicati| 00000030 6f 6e 0d 34 30 52 45 4d 0d 35 30 52 45 4d 20 28 |on.40REM.50REM (| 00000040 43 29 20 53 2e 20 42 75 72 6b 65 2c 20 32 36 2f |C) S. Burke, 26/| 00000050 32 2f 39 31 0d 36 30 52 45 4d 0d 37 30 52 45 4d |2/91.60REM.70REM| 00000060 20 54 68 65 20 6e 65 78 74 20 66 65 77 20 6c 69 | The next few li| 00000070 6e 65 73 20 64 65 66 69 6e 65 20 77 68 65 72 65 |nes define where| 00000080 20 74 68 65 20 62 75 66 66 65 72 73 20 61 72 65 | the buffers are| 00000090 2c 20 77 68 65 72 65 20 74 68 65 0d 38 30 52 45 |, where the.80RE| 000000a0 4d 20 63 6f 64 65 20 67 6f 65 73 20 61 6e 64 20 |M code goes and | 000000b0 77 68 65 72 65 20 74 68 65 20 66 69 6c 65 20 6c |where the file l| 000000c0 6f 61 64 73 20 74 6f 2e 0d 39 30 52 45 4d 0d 31 |oads to..90REM.1| 000000d0 30 30 52 45 4d 20 54 68 69 73 20 76 65 72 73 69 |00REM This versi| 000000e0 6f 6e 20 6d 69 67 68 74 20 77 6f 72 6b 20 77 69 |on might work wi| 000000f0 74 68 20 64 69 73 63 73 2c 20 62 75 74 20 49 20 |th discs, but I | 00000100 63 61 6e 27 74 20 74 65 73 74 20 69 74 21 0d 31 |can't test it!.1| 00000110 31 30 52 45 4d 20 49 74 20 66 69 74 73 20 69 6e |10REM It fits in| 00000120 20 70 61 67 65 73 20 42 20 61 6e 64 20 43 20 77 | pages B and C w| 00000130 69 74 68 20 30 20 62 79 74 65 73 20 73 70 61 72 |ith 0 bytes spar| 00000140 65 21 0d 31 32 30 52 45 4d 0d 31 33 30 3a 0d 31 |e!.120REM.130:.1| 00000150 34 30 6e 61 6d 65 20 20 20 20 20 20 20 3d 20 26 |40name = &| 00000160 30 42 30 30 0d 31 35 30 6e 61 6d 65 5f 68 69 67 |0B00.150name_hig| 00000170 68 20 20 3d 20 26 30 42 0d 31 36 30 6e 61 6d 65 |h = &0B.160name| 00000180 5f 6c 6f 77 20 20 20 3d 20 26 30 30 0d 31 37 30 |_low = &00.170| 00000190 62 6c 6f 63 6b 20 20 20 20 20 20 3d 20 26 30 42 |block = &0B| 000001a0 31 30 0d 31 38 30 62 6c 6f 63 6b 5f 68 69 67 68 |10.180block_high| 000001b0 20 3d 20 26 30 42 0d 31 39 30 62 6c 6f 63 6b 5f | = &0B.190block_| 000001c0 6c 6f 77 20 20 3d 20 26 31 30 0d 32 30 30 63 6f |low = &10.200co| 000001d0 64 65 5f 73 74 61 72 74 20 3d 20 26 30 42 33 30 |de_start = &0B30| 000001e0 0d 32 31 30 6c 6f 61 64 5f 70 61 67 65 20 20 3d |.210load_page =| 000001f0 20 50 41 47 45 20 44 49 56 20 26 31 30 30 0d 32 | PAGE DIV &100.2| 00000200 32 30 3a 0d 32 33 30 6f 73 66 69 6e 64 20 3d 20 |20:.230osfind = | 00000210 26 46 46 43 45 0d 32 34 30 6f 73 62 67 65 74 20 |&FFCE.240osbget | 00000220 3d 20 26 46 46 44 37 0d 32 35 30 6f 73 66 69 6c |= &FFD7.250osfil| 00000230 65 20 3d 20 26 46 46 44 44 20 20 3a 52 45 4d 20 |e = &FFDD :REM | 00000240 50 61 67 65 20 33 33 35 20 6f 66 20 74 68 65 20 |Page 335 of the | 00000250 41 64 76 61 6e 63 65 64 20 55 73 65 72 20 47 75 |Advanced User Gu| 00000260 69 64 65 20 69 73 20 77 72 6f 6e 67 21 0d 32 36 |ide is wrong!.26| 00000270 30 6f 73 62 79 74 65 20 3d 20 26 46 46 46 34 0d |0osbyte = &FFF4.| 00000280 32 37 30 3a 0d 32 38 30 46 4f 52 20 6f 70 74 25 |270:.280FOR opt%| 00000290 3d 30 20 54 4f 20 33 20 53 54 45 50 20 33 0d 32 |=0 TO 3 STEP 3.2| 000002a0 39 30 50 25 20 3d 20 63 6f 64 65 5f 73 74 61 72 |90P% = code_star| 000002b0 74 0d 33 30 30 5b 4f 50 54 20 6f 70 74 25 0d 33 |t.300[OPT opt%.3| 000002c0 31 30 2e 67 6f 0d 33 32 30 4c 44 58 20 23 30 0d |10.go.320LDX #0.| 000002d0 33 33 30 4c 44 41 20 23 32 0d 33 34 30 4a 53 52 |330LDA #2.340JSR| 000002e0 20 6f 73 62 79 74 65 20 20 20 20 20 20 20 20 5c | osbyte \| 000002f0 20 64 69 73 61 62 6c 65 20 52 53 34 32 33 0d 33 | disable RS423.3| 00000300 35 30 4c 44 58 20 23 30 0d 33 36 30 4c 44 41 20 |50LDX #0.360LDA | 00000310 23 31 35 0d 33 37 30 4a 53 52 20 6f 73 62 79 74 |#15.370JSR osbyt| 00000320 65 20 20 20 20 20 20 20 20 5c 20 66 6c 75 73 68 |e \ flush| 00000330 20 61 6c 6c 20 62 75 66 66 65 72 73 0d 33 38 30 | all buffers.380| 00000340 4c 44 58 20 23 32 0d 33 39 30 54 58 41 0d 34 30 |LDX #2.390TXA.40| 00000350 30 4a 53 52 20 6f 73 62 79 74 65 20 20 20 20 20 |0JSR osbyte | 00000360 20 20 20 5c 20 65 6e 61 62 6c 65 20 52 53 34 32 | \ enable RS42| 00000370 33 20 72 65 63 65 69 76 65 0d 34 31 30 2e 6d 61 |3 receive.410.ma| 00000380 69 6e 6c 6f 6f 70 0d 34 32 30 4c 44 41 20 23 26 |inloop.420LDA #&| 00000390 30 44 0d 34 33 30 53 54 41 20 6e 61 6d 65 20 20 |0D.430STA name | 000003a0 20 20 20 20 20 20 20 20 5c 20 6e 75 6c 6c 20 6e | \ null n| 000003b0 61 6d 65 0d 34 34 30 4a 53 52 20 68 61 6e 64 73 |ame.440JSR hands| 000003c0 68 61 6b 65 0d 34 35 30 3a 0d 34 36 30 4a 53 52 |hake.450:.460JSR| 000003d0 20 67 65 74 20 20 20 20 20 20 20 20 20 20 20 5c | get \| 000003e0 20 67 65 74 20 63 6f 6d 6d 61 6e 64 0d 34 37 30 | get command.470| 000003f0 43 50 59 20 23 26 43 30 0d 34 38 30 42 45 51 20 |CPY #&C0.480BEQ | 00000400 65 6e 64 20 20 20 20 20 20 20 20 20 20 20 5c 20 |end \ | 00000410 71 75 69 74 0d 34 39 30 3a 0d 35 30 30 43 50 59 |quit.490:.500CPY| 00000420 20 23 26 33 30 0d 35 31 30 42 4e 45 20 6c 6f 61 | #&30.510BNE loa| 00000430 64 0d 35 32 30 4a 53 52 20 70 75 74 5f 6f 6b 20 |d.520JSR put_ok | 00000440 20 20 20 20 20 20 20 5c 20 63 6f 6e 66 69 72 6d | \ confirm| 00000450 20 63 6f 6d 6d 61 6e 64 0d 35 33 30 4a 53 52 20 | command.530JSR | 00000460 67 65 74 5f 6e 61 6d 65 20 20 20 20 20 20 5c 20 |get_name \ | 00000470 67 65 74 20 66 69 6c 65 6e 61 6d 65 0d 35 34 30 |get filename.540| 00000480 4a 53 52 20 68 61 6e 64 73 68 61 6b 65 0d 35 35 |JSR handshake.55| 00000490 30 4a 53 52 20 67 65 74 0d 35 36 30 2e 6c 6f 61 |0JSR get.560.loa| 000004a0 64 0d 35 37 30 43 50 59 20 23 26 30 43 0d 35 38 |d.570CPY #&0C.58| 000004b0 30 42 4e 45 20 6c 6f 61 64 5f 62 79 74 65 0d 35 |0BNE load_byte.5| 000004c0 39 30 4a 53 52 20 70 75 74 5f 6f 6b 20 20 20 20 |90JSR put_ok | 000004d0 20 20 20 20 5c 20 63 6f 6e 66 69 72 6d 20 63 6f | \ confirm co| 000004e0 6d 6d 61 6e 64 0d 36 30 30 4a 53 52 20 6c 6f 61 |mmand.600JSR loa| 000004f0 64 5f 66 69 6c 65 0d 36 31 30 4a 53 52 20 73 65 |d_file.610JSR se| 00000500 6e 64 5f 66 69 6c 65 0d 36 32 30 4a 4d 50 20 6d |nd_file.620JMP m| 00000510 61 69 6e 6c 6f 6f 70 0d 36 33 30 2e 6c 6f 61 64 |ainloop.630.load| 00000520 5f 62 79 74 65 0d 36 34 30 43 50 59 20 23 26 30 |_byte.640CPY #&0| 00000530 33 0d 36 35 30 42 4e 45 20 63 6f 6d 6d 61 6e 64 |3.650BNE command| 00000540 5f 65 72 72 6f 72 0d 36 36 30 4a 53 52 20 70 75 |_error.660JSR pu| 00000550 74 5f 6f 6b 20 20 20 20 20 20 20 20 5c 20 63 6f |t_ok \ co| 00000560 6e 66 69 72 6d 20 63 6f 6d 6d 61 6e 64 0d 36 37 |nfirm command.67| 00000570 30 4a 53 52 20 6c 6f 61 64 5f 66 69 6c 65 0d 36 |0JSR load_file.6| 00000580 38 30 4a 53 52 20 73 65 6e 64 5f 66 69 6c 65 0d |80JSR send_file.| 00000590 36 39 30 4a 4d 50 20 6d 61 69 6e 6c 6f 6f 70 0d |690JMP mainloop.| 000005a0 37 30 30 2e 63 6f 6d 6d 61 6e 64 5f 65 72 72 6f |700.command_erro| 000005b0 72 0d 37 31 30 4c 44 41 20 23 30 0d 37 32 30 4a |r.710LDA #0.720J| 000005c0 53 52 20 70 75 74 20 20 20 20 20 20 20 20 20 20 |SR put | 000005d0 20 5c 20 63 6f 6d 6d 61 6e 64 20 65 72 72 6f 72 | \ command error| 000005e0 0d 37 33 30 4a 4d 50 20 6d 61 69 6e 6c 6f 6f 70 |.730JMP mainloop| 000005f0 0d 37 34 30 2e 65 6e 64 0d 37 35 30 52 54 53 0d |.740.end.750RTS.| 00000600 37 36 30 2e 6c 6f 61 64 5f 66 69 6c 65 0d 37 37 |760.load_file.77| 00000610 30 4c 44 41 20 23 6e 61 6d 65 5f 6c 6f 77 20 20 |0LDA #name_low | 00000620 20 20 20 5c 20 73 65 74 20 75 70 20 70 61 72 61 | \ set up para| 00000630 6d 65 74 65 72 20 62 6c 6f 63 6b 0d 37 38 30 53 |meter block.780S| 00000640 54 41 20 62 6c 6f 63 6b 0d 37 39 30 4c 44 41 20 |TA block.790LDA | 00000650 23 6e 61 6d 65 5f 68 69 67 68 0d 38 30 30 53 54 |#name_high.800ST| 00000660 41 20 62 6c 6f 63 6b 2b 31 0d 38 31 30 4c 44 41 |A block+1.810LDA| 00000670 20 23 30 0d 38 32 30 53 54 41 20 62 6c 6f 63 6b | #0.820STA block| 00000680 2b 32 0d 38 33 30 53 54 41 20 62 6c 6f 63 6b 2b |+2.830STA block+| 00000690 36 0d 38 34 30 4c 44 41 20 23 6c 6f 61 64 5f 70 |6.840LDA #load_p| 000006a0 61 67 65 0d 38 35 30 53 54 41 20 62 6c 6f 63 6b |age.850STA block| 000006b0 2b 33 0d 38 36 30 4c 44 41 20 23 26 46 46 0d 38 |+3.860LDA #&FF.8| 000006c0 37 30 53 54 41 20 62 6c 6f 63 6b 2b 34 0d 38 38 |70STA block+4.88| 000006d0 30 53 54 41 20 62 6c 6f 63 6b 2b 35 0d 38 39 30 |0STA block+5.890| 000006e0 4c 44 58 20 23 62 6c 6f 63 6b 5f 6c 6f 77 0d 39 |LDX #block_low.9| 000006f0 30 30 4c 44 59 20 23 62 6c 6f 63 6b 5f 68 69 67 |00LDY #block_hig| 00000700 68 0d 39 31 30 4a 53 52 20 6f 73 66 69 6c 65 20 |h.910JSR osfile | 00000710 20 20 20 20 20 20 20 5c 20 6c 6f 61 64 20 66 69 | \ load fi| 00000720 6c 65 0d 39 32 30 4c 44 41 20 62 6c 6f 63 6b 2b |le.920LDA block+| 00000730 31 30 0d 39 33 30 53 54 41 20 26 37 31 0d 39 34 |10.930STA &71.94| 00000740 30 4c 44 41 20 62 6c 6f 63 6b 2b 31 31 0d 39 35 |0LDA block+11.95| 00000750 30 53 54 41 20 26 37 32 20 20 20 20 20 20 20 20 |0STA &72 | 00000760 20 20 20 5c 20 70 75 74 20 66 69 6c 65 20 6c 65 | \ put file le| 00000770 6e 67 74 68 20 69 6e 20 26 37 31 2c 20 26 37 32 |ngth in &71, &72| 00000780 0d 39 36 30 4a 53 52 20 72 65 61 64 5f 6c 6f 61 |.960JSR read_loa| 00000790 64 5f 65 78 65 63 5c 20 67 65 74 20 6c 6f 61 64 |d_exec\ get load| 000007a0 2f 65 78 65 63 20 61 64 64 72 65 73 73 20 61 6e |/exec address an| 000007b0 64 20 6e 61 6d 65 0d 39 37 30 2e 72 65 61 64 5f |d name.970.read_| 000007c0 6e 61 6d 65 0d 39 38 30 4c 44 58 20 23 26 46 46 |name.980LDX #&FF| 000007d0 0d 39 39 30 2e 6e 61 6d 65 6c 6f 6f 70 0d 31 30 |.990.nameloop.10| 000007e0 30 30 49 4e 58 0d 31 30 31 30 43 50 58 20 23 26 |00INX.1010CPX #&| 000007f0 43 0d 31 30 32 30 42 45 51 20 74 6f 6f 5f 66 61 |C.1020BEQ too_fa| 00000800 72 0d 31 30 33 30 5c 20 20 20 20 20 20 20 20 20 |r.1030\ | 00000810 4c 44 41 20 26 33 42 32 2c 58 20 20 20 20 20 20 |LDA &3B2,X | 00000820 20 20 21 20 70 75 6c 6c 20 66 69 6c 65 6e 61 6d | ! pull filenam| 00000830 65 20 6f 75 74 20 6f 66 20 63 61 73 73 65 74 74 |e out of cassett| 00000840 65 20 77 6f 72 6b 73 70 61 63 65 0d 31 30 34 30 |e workspace.1040| 00000850 4c 44 41 20 23 30 20 20 20 20 20 20 20 20 20 20 |LDA #0 | 00000860 20 20 5c 20 64 6f 6e 27 74 20 6b 6e 6f 77 20 77 | \ don't know w| 00000870 68 65 72 65 20 74 6f 20 67 65 74 20 69 74 20 66 |here to get it f| 00000880 6f 72 20 61 20 64 69 73 63 20 73 79 73 74 65 6d |or a disc system| 00000890 0d 31 30 35 30 53 54 41 20 6e 61 6d 65 2c 58 20 |.1050STA name,X | 000008a0 20 20 20 20 20 20 20 5c 20 73 65 65 20 41 55 47 | \ see AUG| 000008b0 20 70 2e 20 32 37 39 0d 31 30 36 30 42 4e 45 20 | p. 279.1060BNE | 000008c0 6e 61 6d 65 6c 6f 6f 70 0d 31 30 37 30 2e 74 6f |nameloop.1070.to| 000008d0 6f 5f 66 61 72 0d 31 30 38 30 4c 44 41 20 23 26 |o_far.1080LDA #&| 000008e0 30 44 0d 31 30 39 30 53 54 41 20 6e 61 6d 65 2c |0D.1090STA name,| 000008f0 58 0d 31 31 30 30 52 54 53 0d 31 31 31 30 2e 67 |X.1100RTS.1110.g| 00000900 65 74 5f 6e 61 6d 65 0d 31 31 32 30 4c 44 58 20 |et_name.1120LDX | 00000910 23 26 46 46 0d 31 31 33 30 53 54 58 20 26 38 31 |#&FF.1130STX &81| 00000920 20 20 20 20 20 20 20 20 20 20 20 5c 20 22 67 65 | \ "ge| 00000930 74 22 20 63 6f 72 72 75 70 74 73 20 72 65 67 69 |t" corrupts regi| 00000940 73 74 65 72 73 0d 31 31 34 30 2e 67 65 74 5f 63 |sters.1140.get_c| 00000950 68 61 72 0d 31 31 35 30 43 50 58 20 23 26 42 0d |har.1150CPX #&B.| 00000960 31 31 36 30 42 45 51 20 74 6f 6f 5f 66 61 72 0d |1160BEQ too_far.| 00000970 31 31 37 30 4a 53 52 20 67 65 74 20 20 20 20 20 |1170JSR get | 00000980 20 20 20 20 20 20 5c 20 67 65 74 20 66 69 6c 65 | \ get file| 00000990 6e 61 6d 65 20 66 72 6f 6d 20 41 72 63 0d 31 31 |name from Arc.11| 000009a0 38 30 54 59 41 0d 31 31 39 30 49 4e 43 20 26 38 |80TYA.1190INC &8| 000009b0 31 20 20 20 0d 31 32 30 30 4c 44 58 20 26 38 31 |1 .1200LDX &81| 000009c0 0d 31 32 31 30 53 54 41 20 6e 61 6d 65 2c 58 0d |.1210STA name,X.| 000009d0 31 32 32 30 43 4d 50 20 23 26 30 44 0d 31 32 33 |1220CMP #&0D.123| 000009e0 30 42 4e 45 20 67 65 74 5f 63 68 61 72 0d 31 32 |0BNE get_char.12| 000009f0 34 30 52 54 53 0d 31 32 35 30 2e 72 65 61 64 5f |40RTS.1250.read_| 00000a00 6c 6f 61 64 5f 65 78 65 63 0d 31 32 36 30 4c 44 |load_exec.1260LD| 00000a10 58 20 23 38 0d 31 32 37 30 2e 6c 6f 61 64 5f 65 |X #8.1270.load_e| 00000a20 78 65 63 5f 6c 6f 6f 70 0d 31 32 38 30 4c 44 41 |xec_loop.1280LDA| 00000a30 20 26 33 42 44 2c 58 20 20 20 20 20 20 20 20 5c | &3BD,X \| 00000a40 20 6c 6f 61 64 2f 65 78 65 63 20 61 64 64 72 65 | load/exec addre| 00000a50 73 73 20 66 72 6f 6d 20 63 61 73 73 65 74 74 65 |ss from cassette| 00000a60 20 77 6f 72 6b 73 70 61 63 65 0d 31 32 39 30 53 | workspace.1290S| 00000a70 54 41 20 26 38 31 2c 58 0d 31 33 30 30 44 45 58 |TA &81,X.1300DEX| 00000a80 0d 31 33 31 30 42 4e 45 20 6c 6f 61 64 5f 65 78 |.1310BNE load_ex| 00000a90 65 63 5f 6c 6f 6f 70 0d 31 33 32 30 52 54 53 0d |ec_loop.1320RTS.| 00000aa0 31 33 33 30 2e 68 61 6e 64 73 68 61 6b 65 0d 31 |1330.handshake.1| 00000ab0 33 34 30 4c 44 41 20 23 41 53 43 28 22 53 22 29 |340LDA #ASC("S")| 00000ac0 0d 31 33 35 30 4a 53 52 20 70 75 74 0d 31 33 36 |.1350JSR put.136| 00000ad0 30 4c 44 41 20 23 41 53 43 28 22 42 22 29 0d 31 |0LDA #ASC("B").1| 00000ae0 33 37 30 4a 53 52 20 70 75 74 20 20 20 20 20 20 |370JSR put | 00000af0 20 20 20 20 20 5c 20 73 65 6e 64 20 22 53 42 22 | \ send "SB"| 00000b00 20 2e 2e 2e 0d 31 33 38 30 4a 53 52 20 67 65 74 | ....1380JSR get| 00000b10 0d 31 33 39 30 43 50 59 20 23 41 53 43 28 22 73 |.1390CPY #ASC("s| 00000b20 22 29 0d 31 34 30 30 42 4e 45 20 68 61 6e 64 73 |").1400BNE hands| 00000b30 68 61 6b 65 0d 31 34 31 30 4a 53 52 20 67 65 74 |hake.1410JSR get| 00000b40 0d 31 34 32 30 43 50 59 20 23 41 53 43 28 22 62 |.1420CPY #ASC("b| 00000b50 22 29 0d 31 34 33 30 42 4e 45 20 68 61 6e 64 73 |").1430BNE hands| 00000b60 68 61 6b 65 20 20 20 20 20 5c 20 2e 2e 2e 20 61 |hake \ ... a| 00000b70 6e 64 20 72 65 63 65 69 76 65 20 22 73 62 22 20 |nd receive "sb" | 00000b80 74 6f 20 68 61 6e 64 73 68 61 6b 65 0d 31 34 34 |to handshake.144| 00000b90 30 52 54 53 0d 31 34 35 30 2e 73 65 6e 64 5f 66 |0RTS.1450.send_f| 00000ba0 69 6c 65 0d 31 34 36 30 4c 44 41 20 26 37 31 0d |ile.1460LDA &71.| 00000bb0 31 34 37 30 4a 53 52 20 70 75 74 0d 31 34 38 30 |1470JSR put.1480| 00000bc0 4c 44 41 20 26 37 32 0d 31 34 39 30 4a 53 52 20 |LDA &72.1490JSR | 00000bd0 70 75 74 20 20 20 20 20 20 20 20 20 20 20 5c 20 |put \ | 00000be0 73 65 6e 64 20 66 69 6c 65 20 6c 65 6e 67 74 68 |send file length| 00000bf0 0d 31 35 30 30 3a 0d 31 35 31 30 4c 44 41 20 23 |.1500:.1510LDA #| 00000c00 6c 6f 61 64 5f 70 61 67 65 0d 31 35 32 30 53 54 |load_page.1520ST| 00000c10 41 20 26 37 34 0d 31 35 33 30 4c 44 41 20 23 30 |A &74.1530LDA #0| 00000c20 20 0d 31 35 34 30 53 54 41 20 26 37 33 20 20 20 | .1540STA &73 | 00000c30 20 20 20 20 20 20 20 20 5c 20 72 65 73 65 74 20 | \ reset | 00000c40 6c 6f 61 64 20 61 64 64 72 65 73 73 0d 31 35 35 |load address.155| 00000c50 30 44 45 43 20 26 37 32 20 20 20 20 20 20 20 20 |0DEC &72 | 00000c60 20 20 20 5c 20 6e 65 65 64 20 74 68 69 73 20 66 | \ need this f| 00000c70 6f 72 20 74 65 73 74 20 62 65 6c 6f 77 0d 31 35 |or test below.15| 00000c80 36 30 42 4d 49 20 6c 61 73 74 5f 62 6c 6f 63 6b |60BMI last_block| 00000c90 20 20 20 20 5c 20 66 69 6c 65 20 6c 65 6e 67 74 | \ file lengt| 00000ca0 68 20 3c 20 32 35 36 20 62 79 74 65 73 3f 0d 31 |h < 256 bytes?.1| 00000cb0 35 37 30 53 54 41 20 26 38 30 20 20 20 20 20 20 |570STA &80 | 00000cc0 20 20 20 20 20 5c 20 62 6c 6f 63 6b 20 6c 65 6e | \ block len| 00000cd0 67 74 68 20 3d 20 30 20 28 20 3d 20 32 35 36 29 |gth = 0 ( = 256)| 00000ce0 0d 31 35 38 30 2e 73 65 6e 64 5f 62 6c 6f 63 6b |.1580.send_block| 00000cf0 0d 31 35 39 30 4a 53 52 20 70 75 74 5f 6f 6b 20 |.1590JSR put_ok | 00000d00 20 20 20 20 20 20 20 5c 20 6e 6f 74 20 65 6f 66 | \ not eof| 00000d10 0d 31 36 30 30 4c 44 41 20 23 33 20 20 20 20 20 |.1600LDA #3 | 00000d20 20 20 20 20 20 20 20 5c 20 73 65 6e 64 20 6c 65 | \ send le| 00000d30 6e 67 74 68 20 33 20 74 69 6d 65 73 0d 31 36 31 |ngth 3 times.161| 00000d40 30 53 54 41 20 26 37 36 20 20 20 20 20 20 20 20 |0STA &76 | 00000d50 20 20 20 5c 20 75 73 65 20 43 52 43 20 6c 6f 77 | \ use CRC low| 00000d60 20 62 79 74 65 20 61 73 20 63 6f 75 6e 74 65 72 | byte as counter| 00000d70 0d 31 36 32 30 2e 6c 65 6e 6f 75 74 0d 31 36 33 |.1620.lenout.163| 00000d80 30 4c 44 41 20 26 38 30 0d 31 36 34 30 4a 53 52 |0LDA &80.1640JSR| 00000d90 20 70 75 74 20 20 20 20 20 20 20 20 20 20 20 5c | put \| 00000da0 20 6f 75 74 70 75 74 20 62 6c 6f 63 6b 20 6c 65 | output block le| 00000db0 6e 67 74 68 0d 31 36 35 30 44 45 43 20 26 37 36 |ngth.1650DEC &76| 00000dc0 0d 31 36 36 30 42 4e 45 20 6c 65 6e 6f 75 74 20 |.1660BNE lenout | 00000dd0 20 20 20 20 20 20 20 5c 20 43 52 43 20 6c 6f 77 | \ CRC low| 00000de0 20 62 79 74 65 20 7a 65 72 6f 20 61 74 20 65 78 | byte zero at ex| 00000df0 69 74 0d 31 36 37 30 4c 44 59 20 23 30 0d 31 36 |it.1670LDY #0.16| 00000e00 38 30 53 54 59 20 26 37 35 20 20 20 20 20 20 20 |80STY &75 | 00000e10 20 20 20 20 5c 20 69 6e 69 74 69 61 6c 69 73 65 | \ initialise| 00000e20 20 43 52 43 20 68 69 67 68 20 62 79 74 65 0d 31 | CRC high byte.1| 00000e30 36 39 30 2e 73 65 6e 64 5f 62 79 74 65 0d 31 37 |690.send_byte.17| 00000e40 30 30 53 54 59 20 26 37 30 20 20 20 20 20 20 20 |00STY &70 | 00000e50 20 20 20 20 5c 20 73 61 76 65 20 6f 66 66 73 65 | \ save offse| 00000e60 74 0d 31 37 31 30 4c 44 41 20 28 26 37 33 29 2c |t.1710LDA (&73),| 00000e70 59 20 20 20 20 20 20 20 5c 20 6c 6f 61 64 20 6e |Y \ load n| 00000e80 65 78 74 20 62 79 74 65 20 2e 2e 2e 0d 31 37 32 |ext byte ....172| 00000e90 30 50 48 41 0d 31 37 33 30 4a 53 52 20 70 75 74 |0PHA.1730JSR put| 00000ea0 0d 31 37 34 30 50 4c 41 20 20 20 20 20 20 20 20 |.1740PLA | 00000eb0 20 20 20 20 20 20 20 5c 20 67 65 74 20 63 68 61 | \ get cha| 00000ec0 72 61 63 74 65 72 20 62 61 63 6b 0d 31 37 35 30 |racter back.1750| 00000ed0 4a 53 52 20 63 72 63 20 20 20 20 20 20 20 20 20 |JSR crc | 00000ee0 20 20 5c 20 75 70 64 61 74 65 20 63 72 63 0d 31 | \ update crc.1| 00000ef0 37 36 30 4c 44 59 20 26 37 30 0d 31 37 37 30 49 |760LDY &70.1770I| 00000f00 4e 59 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |NY | 00000f10 20 5c 20 69 6e 63 72 65 6d 65 6e 74 20 6f 66 66 | \ increment off| 00000f20 73 65 74 0d 31 37 38 30 43 50 59 20 26 38 30 0d |set.1780CPY &80.| 00000f30 31 37 39 30 42 4e 45 20 73 65 6e 64 5f 62 79 74 |1790BNE send_byt| 00000f40 65 20 20 20 20 20 5c 20 65 6e 64 20 6f 66 20 62 |e \ end of b| 00000f50 6c 6f 63 6b 3f 0d 31 38 30 30 3a 0d 31 38 31 30 |lock?.1800:.1810| 00000f60 4c 44 41 20 26 37 35 0d 31 38 32 30 4a 53 52 20 |LDA &75.1820JSR | 00000f70 70 75 74 20 20 20 20 20 20 20 20 20 20 20 5c 20 |put \ | 00000f80 6f 75 74 70 75 74 20 43 52 43 20 68 69 67 68 20 |output CRC high | 00000f90 62 79 74 65 0d 31 38 33 30 4c 44 41 20 26 37 36 |byte.1830LDA &76| 00000fa0 0d 31 38 34 30 4a 53 52 20 70 75 74 20 20 20 20 |.1840JSR put | 00000fb0 20 20 20 20 20 20 20 5c 20 6f 75 74 70 75 74 20 | \ output | 00000fc0 43 52 43 20 6c 6f 77 20 62 79 74 65 0d 31 38 35 |CRC low byte.185| 00000fd0 30 3a 0d 31 38 36 30 4a 53 52 20 67 65 74 20 20 |0:.1860JSR get | 00000fe0 20 20 20 20 20 20 20 20 20 5c 20 6c 6f 6f 6b 20 | \ look | 00000ff0 66 6f 72 20 63 6f 6e 66 69 72 6d 61 74 69 6f 6e |for confirmation| 00001000 0d 31 38 37 30 54 59 41 0d 31 38 38 30 42 45 51 |.1870TYA.1880BEQ| 00001010 20 73 65 6e 64 5f 62 6c 6f 63 6b 20 20 20 20 5c | send_block \| 00001020 20 7a 65 72 6f 20 6d 65 61 6e 73 20 65 72 72 6f | zero means erro| 00001030 72 2c 20 73 6f 20 64 6f 20 61 67 61 69 6e 0d 31 |r, so do again.1| 00001040 38 39 30 3a 0d 31 39 30 30 49 4e 43 20 26 37 34 |890:.1900INC &74| 00001050 20 20 20 20 20 20 20 20 20 20 20 5c 20 69 6e 63 | \ inc| 00001060 72 65 6d 65 6e 74 20 61 64 64 72 65 73 73 20 68 |rement address h| 00001070 69 67 68 20 62 79 74 65 0d 31 39 31 30 44 45 43 |igh byte.1910DEC| 00001080 20 26 37 32 20 20 20 20 20 20 20 20 20 20 20 5c | &72 \| 00001090 20 64 65 63 72 65 6d 65 6e 74 20 6c 65 6e 67 74 | decrement lengt| 000010a0 68 20 68 69 67 68 20 62 79 74 65 0d 31 39 32 30 |h high byte.1920| 000010b0 42 50 4c 20 73 65 6e 64 5f 62 6c 6f 63 6b 20 20 |BPL send_block | 000010c0 20 20 5c 20 61 72 65 20 77 65 20 66 69 6e 69 73 | \ are we finis| 000010d0 68 65 64 3f 0d 31 39 33 30 2e 6c 61 73 74 5f 62 |hed?.1930.last_b| 000010e0 6c 6f 63 6b 0d 31 39 34 30 4c 44 59 20 23 30 0d |lock.1940LDY #0.| 000010f0 31 39 35 30 4c 44 41 20 26 37 31 20 20 20 20 20 |1950LDA &71 | 00001100 20 20 20 20 20 20 5c 20 6c 65 6e 67 74 68 20 6f | \ length o| 00001110 66 20 6c 61 73 74 20 62 6c 6f 63 6b 0d 31 39 36 |f last block.196| 00001120 30 53 54 59 20 26 37 31 20 20 20 20 20 20 20 20 |0STY &71 | 00001130 20 20 20 5c 20 73 65 74 20 6c 65 6e 67 74 68 20 | \ set length | 00001140 74 6f 20 7a 65 72 6f 0d 31 39 37 30 53 54 41 20 |to zero.1970STA | 00001150 26 38 30 0d 31 39 38 30 42 4e 45 20 73 65 6e 64 |&80.1980BNE send| 00001160 5f 62 6c 6f 63 6b 20 20 20 20 5c 20 6f 75 74 70 |_block \ outp| 00001170 75 74 20 69 66 20 6e 6f 6e 2d 7a 65 72 6f 0d 31 |ut if non-zero.1| 00001180 39 39 30 4c 44 41 20 23 30 0d 32 30 30 30 4a 53 |990LDA #0.2000JS| 00001190 52 20 70 75 74 20 20 20 20 20 20 20 20 20 20 20 |R put | 000011a0 5c 20 7a 65 72 6f 20 6d 61 72 6b 73 20 65 6f 66 |\ zero marks eof| 000011b0 0d 32 30 31 30 4a 53 52 20 70 75 74 5f 6c 6f 61 |.2010JSR put_loa| 000011c0 64 5f 65 78 65 63 20 5c 20 73 65 6e 64 20 74 68 |d_exec \ send th| 000011d0 65 20 6c 6f 61 64 2f 65 78 65 63 20 61 64 72 65 |e load/exec adre| 000011e0 73 73 0d 32 30 32 30 2e 70 75 74 5f 6e 61 6d 65 |ss.2020.put_name| 000011f0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00001200 20 20 20 5c 20 66 61 6c 6c 20 74 68 72 6f 75 67 | \ fall throug| 00001210 68 20 74 6f 20 70 75 74 5f 6e 61 6d 65 20 2e 2e |h to put_name ..| 00001220 2e 0d 32 30 33 30 4c 44 58 20 23 26 46 46 0d 32 |..2030LDX #&FF.2| 00001230 30 34 30 53 54 58 20 26 38 31 20 20 20 20 20 20 |040STX &81 | 00001240 20 20 20 20 20 5c 20 22 70 75 74 22 20 63 6f 72 | \ "put" cor| 00001250 72 75 70 74 73 20 72 65 67 69 73 74 65 72 73 0d |rupts registers.| 00001260 32 30 35 30 2e 70 75 74 5f 63 68 61 72 20 20 20 |2050.put_char | 00001270 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00001280 5c 20 6f 75 74 70 75 74 20 66 69 6c 65 20 6e 61 |\ output file na| 00001290 6d 65 0d 32 30 36 30 49 4e 43 20 26 38 31 0d 32 |me.2060INC &81.2| 000012a0 30 37 30 4c 44 58 20 26 38 31 0d 32 30 38 30 4c |070LDX &81.2080L| 000012b0 44 41 20 6e 61 6d 65 2c 58 0d 32 30 39 30 50 48 |DA name,X.2090PH| 000012c0 41 0d 32 31 30 30 4a 53 52 20 70 75 74 0d 32 31 |A.2100JSR put.21| 000012d0 31 30 50 4c 41 0d 32 31 32 30 43 4d 50 20 23 26 |10PLA.2120CMP #&| 000012e0 30 44 0d 32 31 33 30 42 4e 45 20 70 75 74 5f 63 |0D.2130BNE put_c| 000012f0 68 61 72 0d 32 31 34 30 52 54 53 0d 32 31 35 30 |har.2140RTS.2150| 00001300 2e 70 75 74 5f 6c 6f 61 64 5f 65 78 65 63 20 20 |.put_load_exec | 00001310 20 20 20 20 20 20 20 20 20 20 20 20 5c 20 70 75 | \ pu| 00001320 74 20 6f 75 74 20 6c 6f 61 64 2f 65 78 65 63 20 |t out load/exec | 00001330 61 64 64 72 65 73 73 0d 32 31 36 30 4c 44 58 20 |address.2160LDX | 00001340 23 30 0d 32 31 37 30 53 54 58 20 26 38 31 20 20 |#0.2170STX &81 | 00001350 20 20 20 20 20 20 20 20 20 5c 20 22 70 75 74 22 | \ "put"| 00001360 20 63 6f 72 72 75 70 74 73 20 72 65 67 69 73 74 | corrupts regist| 00001370 65 72 73 0d 32 31 38 30 2e 70 75 74 5f 6c 6f 61 |ers.2180.put_loa| 00001380 64 5f 65 78 65 63 5f 6c 6f 6f 70 0d 32 31 39 30 |d_exec_loop.2190| 00001390 4c 44 41 20 26 38 32 2c 58 0d 32 32 30 30 4a 53 |LDA &82,X.2200JS| 000013a0 52 20 70 75 74 0d 32 32 31 30 49 4e 43 20 26 38 |R put.2210INC &8| 000013b0 31 0d 32 32 32 30 4c 44 58 20 26 38 31 0d 32 32 |1.2220LDX &81.22| 000013c0 33 30 43 50 58 20 23 38 0d 32 32 34 30 42 4e 45 |30CPX #8.2240BNE| 000013d0 20 70 75 74 5f 6c 6f 61 64 5f 65 78 65 63 5f 6c | put_load_exec_l| 000013e0 6f 6f 70 0d 32 32 35 30 52 54 53 0d 32 32 36 30 |oop.2250RTS.2260| 000013f0 2e 70 75 74 5f 6f 6b 0d 32 32 37 30 4c 44 41 20 |.put_ok.2270LDA | 00001400 23 26 46 46 0d 32 32 38 30 2e 70 75 74 0d 32 32 |#&FF.2280.put.22| 00001410 39 30 50 48 41 20 20 20 20 20 20 20 20 20 20 20 |90PHA | 00001420 20 20 20 20 5c 20 73 61 76 65 20 76 61 6c 75 65 | \ save value| 00001430 20 74 6f 20 6f 75 74 70 75 74 0d 32 33 30 30 4a | to output.2300J| 00001440 53 52 20 65 73 63 61 70 65 0d 32 33 31 30 4c 44 |SR escape.2310LD| 00001450 58 20 23 26 46 44 0d 32 33 32 30 4c 44 41 20 23 |X #&FD.2320LDA #| 00001460 26 38 30 0d 32 33 33 30 4a 53 52 20 6f 73 62 79 |&80.2330JSR osby| 00001470 74 65 20 20 20 20 20 20 20 20 5c 20 67 65 74 20 |te \ get | 00001480 23 20 65 6d 70 74 79 20 62 79 74 65 73 20 69 6e |# empty bytes in| 00001490 20 52 53 34 32 33 20 6f 75 74 70 75 74 20 62 75 | RS423 output bu| 000014a0 66 66 65 72 0d 32 33 34 30 43 50 58 20 23 39 0d |ffer.2340CPX #9.| 000014b0 32 33 35 30 50 4c 41 0d 32 33 36 30 42 43 43 20 |2350PLA.2360BCC | 000014c0 70 75 74 20 20 20 20 20 20 20 20 20 20 20 5c 20 |put \ | 000014d0 69 66 20 3c 20 39 20 62 79 74 65 73 20 72 65 6d |if < 9 bytes rem| 000014e0 61 69 6e 2c 20 77 61 69 74 20 2e 2e 2e 0d 32 33 |ain, wait ....23| 000014f0 37 30 3a 0d 32 33 38 30 4c 44 58 20 23 32 0d 32 |70:.2380LDX #2.2| 00001500 33 39 30 54 41 59 0d 32 34 30 30 4c 44 41 20 23 |390TAY.2400LDA #| 00001510 26 38 41 0d 32 34 31 30 4a 4d 50 20 6f 73 62 79 |&8A.2410JMP osby| 00001520 74 65 20 20 20 20 20 20 20 20 5c 20 2e 2e 2e 20 |te \ ... | 00001530 61 6e 64 20 73 65 6e 64 20 69 74 0d 32 34 32 30 |and send it.2420| 00001540 2e 67 65 74 0d 32 34 33 30 4a 53 52 20 65 73 63 |.get.2430JSR esc| 00001550 61 70 65 0d 32 34 34 30 4c 44 58 20 23 31 0d 32 |ape.2440LDX #1.2| 00001560 34 35 30 4c 44 41 20 23 26 39 31 0d 32 34 36 30 |450LDA #&91.2460| 00001570 4a 53 52 20 6f 73 62 79 74 65 20 20 20 20 20 20 |JSR osbyte | 00001580 20 20 5c 20 72 65 61 64 20 61 20 62 79 74 65 0d | \ read a byte.| 00001590 32 34 37 30 42 43 53 20 67 65 74 0d 32 34 38 30 |2470BCS get.2480| 000015a0 52 54 53 0d 32 34 39 30 2e 63 72 63 0d 32 35 30 |RTS.2490.crc.250| 000015b0 30 45 4f 52 20 26 37 35 20 20 20 20 20 20 20 20 |0EOR &75 | 000015c0 20 20 20 5c 20 63 61 6c 63 75 6c 61 74 65 20 43 | \ calculate C| 000015d0 52 43 20 69 6e 20 26 37 35 2c 20 26 37 36 0d 32 |RC in &75, &76.2| 000015e0 35 31 30 53 54 41 20 26 37 35 20 20 20 20 20 20 |510STA &75 | 000015f0 20 20 20 20 20 5c 20 61 6c 67 6f 72 69 74 68 6d | \ algorithm| 00001600 20 66 72 6f 6d 20 41 64 76 61 6e 63 65 64 20 55 | from Advanced U| 00001610 73 65 72 20 47 75 69 64 65 0d 32 35 32 30 4c 44 |ser Guide.2520LD| 00001620 58 20 23 38 20 20 20 20 20 20 20 20 20 20 20 20 |X #8 | 00001630 5c 20 49 20 68 6f 70 65 20 69 74 27 73 20 72 69 |\ I hope it's ri| 00001640 67 68 74 21 0d 32 35 33 30 2e 63 72 63 5f 6c 6f |ght!.2530.crc_lo| 00001650 6f 70 0d 32 35 34 30 4c 44 41 20 26 37 35 0d 32 |op.2540LDA &75.2| 00001660 35 35 30 52 4f 4c 20 41 0d 32 35 36 30 42 43 43 |550ROL A.2560BCC| 00001670 20 62 37 7a 0d 32 35 37 30 4c 44 41 20 26 37 35 | b7z.2570LDA &75| 00001680 0d 32 35 38 30 45 4f 52 20 23 38 0d 32 35 39 30 |.2580EOR #8.2590| 00001690 53 54 41 20 26 37 35 0d 32 36 30 30 4c 44 41 20 |STA &75.2600LDA | 000016a0 26 37 36 0d 32 36 31 30 45 4f 52 20 23 26 31 30 |&76.2610EOR #&10| 000016b0 0d 32 36 32 30 53 54 41 20 26 37 36 0d 32 36 33 |.2620STA &76.263| 000016c0 30 2e 62 37 7a 0d 32 36 34 30 52 4f 4c 20 26 37 |0.b7z.2640ROL &7| 000016d0 36 0d 32 36 35 30 52 4f 4c 20 26 37 35 0d 32 36 |6.2650ROL &75.26| 000016e0 36 30 44 45 58 0d 32 36 37 30 42 4e 45 20 63 72 |60DEX.2670BNE cr| 000016f0 63 5f 6c 6f 6f 70 0d 32 36 38 30 52 54 53 0d 32 |c_loop.2680RTS.2| 00001700 36 39 30 2e 65 73 63 61 70 65 0d 32 37 30 30 4c |690.escape.2700L| 00001710 44 41 20 26 46 46 0d 32 37 31 30 42 4d 49 20 65 |DA &FF.2710BMI e| 00001720 72 72 6f 72 0d 32 37 32 30 52 54 53 0d 32 37 33 |rror.2720RTS.273| 00001730 30 2e 65 72 72 6f 72 0d 32 37 34 30 4c 44 41 20 |0.error.2740LDA | 00001740 23 26 37 45 0d 32 37 35 30 4a 53 52 20 6f 73 62 |#&7E.2750JSR osb| 00001750 79 74 65 20 20 20 20 20 20 20 20 5c 20 61 63 6b |yte \ ack| 00001760 6e 6f 77 6c 65 64 67 65 20 65 73 63 61 70 65 0d |nowledge escape.| 00001770 32 37 36 30 4c 44 58 20 23 30 0d 32 37 37 30 4c |2760LDX #0.2770L| 00001780 44 59 20 23 30 0d 32 37 38 30 4c 44 41 20 23 30 |DY #0.2780LDA #0| 00001790 0d 32 37 39 30 4a 53 52 20 26 46 46 43 45 20 20 |.2790JSR &FFCE | 000017a0 20 20 20 20 20 20 20 5c 20 63 6c 6f 73 65 20 61 | \ close a| 000017b0 6c 6c 20 66 69 6c 65 73 0d 32 38 30 30 42 52 4b |ll files.2800BRK| 000017c0 0d 32 38 31 30 5d 0d 32 38 32 30 3f 50 25 20 3d |.2810].2820?P% =| 000017d0 20 26 31 31 0d 32 38 33 30 50 25 20 20 3d 20 50 | &11.2830P% = P| 000017e0 25 20 2b 20 31 0d 32 38 34 30 24 50 25 20 3d 20 |% + 1.2840$P% = | 000017f0 22 45 73 63 61 70 65 22 20 2b 20 43 48 52 24 30 |"Escape" + CHR$0| 00001800 0d 32 38 35 30 4e 45 58 54 20 6f 70 74 25 0d 2a |.2850NEXT opt%.*| 00001810 4f 50 54 20 31 2c 32 0d 52 55 4e 0d 43 41 4c 4c |OPT 1,2.RUN.CALL| 00001820 20 67 6f 0d | go.| 00001824