Home » Personal collection » Acorn tapes » Electron_User » Electron_User_tape10b_acorn_eu_1990_april.wav » CPROG1
CPROG1
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_tape10b_acorn_eu_1990_april.wav |
| Filename: | CPROG1 |
| Read OK: | ❌ |
| File size: | 0456 bytes |
| Load address: | 2000 |
| Exec address: | 1900 |
File contents
� VDU compression � By R.Henderson � (c) Electron User (� 4 2 �assemble < �image F ?&74=40 P ?&75=32 Z� compress dG=� n� x � decomp � ?&D0=0 �� 28,8,23,32,8 � ?&35F=10 �� Normal cursor �� �� � �� �assemble ��i%=0�2 �2 � P%=&900 � [ OPT i% � .compress � \ Read � codes and save in a \ convienient area of memory LDA #0 STA &72 " STA &73 , STA &70 6 LDA #&30 @ STA &71 J LDY #0 T .loop ^ LDA #31 h JSR &FFEE r LDA &72 | JSR &FFEE � LDA &73 � JSR &FFcont �\ Reconstruct �\ from � codes � .decomp � LDA #0 � STA &70 � LDA #&30 � STA &71 � LDA #31 � JSR &FFEE � LDA #0 � JSR &FFEE � JSR &FFEE LDY #0 LDA &74 STA &72 LDA &75 * STA &73 4 LDY #0 > .loop2 HLDA (&70),Y R JSR &FFEE \ DEC &72 f LDA &72 p BEQ set2 z.ret �INY � BNE loop2 � INC &71 � LDA &73 � BNE loop2 � .rts RTS � .set2 � LDA #40 � STA &72 � DEC &73 � BEQ rts � JMP ret �] � � $ ��image .� 23,1,2;0;0;0;0; 8 ?&D0=2 B"� Static cursor / no scrolling L �X=1� 32 V1� "This is an example of the VDU compressor"; `� j� �
00000000 0d 00 0a 15 f4 20 56 44 55 20 63 6f 6d 70 72 65 |..... VDU compre| 00000010 73 73 69 6f 6e 0d 00 14 14 f4 20 42 79 20 52 2e |ssion..... By R.| 00000020 48 65 6e 64 65 72 73 6f 6e 0d 00 1e 17 f4 20 28 |Henderson..... (| 00000030 63 29 20 45 6c 65 63 74 72 6f 6e 20 55 73 65 72 |c) Electron User| 00000040 0d 00 28 07 eb 20 34 0d 00 32 0d f2 61 73 73 65 |..(.. 4..2..asse| 00000050 6d 62 6c 65 0d 00 3c 0a f2 69 6d 61 67 65 0d 00 |mble..<..image..| 00000060 46 0b 3f 26 37 34 3d 34 30 0d 00 50 0b 3f 26 37 |F.?&74=40..P.?&7| 00000070 35 3d 33 32 0d 00 5a 0e d6 20 63 6f 6d 70 72 65 |5=32..Z.. compre| 00000080 73 73 0d 00 64 07 47 3d a5 0d 00 6e 05 db 0d 00 |ss..d.G=...n....| 00000090 78 0c d6 20 64 65 63 6f 6d 70 0d 00 82 0a 3f 26 |x.. decomp....?&| 000000a0 44 30 3d 30 0d 00 8c 12 ef 20 32 38 2c 38 2c 32 |D0=0..... 28,8,2| 000000b0 33 2c 33 32 2c 38 0d 00 96 0c 3f 26 33 35 46 3d |3,32,8....?&35F=| 000000c0 31 30 0d 00 a0 13 f4 20 4e 6f 72 6d 61 6c 20 63 |10..... Normal c| 000000d0 75 72 73 6f 72 0d 00 aa 05 db 0d 00 b4 05 e0 0d |ursor...........| 000000e0 00 be 05 20 0d 00 c8 0f dd 20 f2 61 73 73 65 6d |... ..... .assem| 000000f0 62 6c 65 0d 00 d2 0e e3 69 25 3d 30 b8 32 20 88 |ble.....i%=0.2 .| 00000100 32 0d 00 dc 0b 50 25 3d 26 39 30 30 0d 00 e6 0c |2....P%=&900....| 00000110 5b 20 4f 50 54 20 69 25 0d 00 f0 0d 2e 63 6f 6d |[ OPT i%.....com| 00000120 70 72 65 73 73 0d 00 fa 20 5c 20 52 65 61 64 20 |press... \ Read | 00000130 ef 20 63 6f 64 65 73 20 61 6e 64 20 73 61 76 65 |. codes and save| 00000140 20 69 6e 20 61 0d 01 04 20 5c 20 63 6f 6e 76 69 | in a... \ convi| 00000150 65 6e 69 65 6e 74 20 61 72 65 61 20 6f 66 20 6d |enient area of m| 00000160 65 6d 6f 72 79 0d 01 0e 0a 4c 44 41 20 23 30 0d |emory....LDA #0.| 00000170 01 18 0b 53 54 41 20 26 37 32 0d 01 22 0b 53 54 |...STA &72..".ST| 00000180 41 20 26 37 33 0d 01 2c 0b 53 54 41 20 26 37 30 |A &73..,.STA &70| 00000190 0d 01 36 0c 4c 44 41 20 23 26 33 30 0d 01 40 0b |..6.LDA #&30..@.| 000001a0 53 54 41 20 26 37 31 0d 01 4a 0a 4c 44 59 20 23 |STA &71..J.LDY #| 000001b0 30 0d 01 54 09 2e 6c 6f 6f 70 0d 01 5e 0b 4c 44 |0..T..loop..^.LD| 000001c0 41 20 23 33 31 0d 01 68 0d 4a 53 52 20 26 46 46 |A #31..h.JSR &FF| 000001d0 45 45 0d 01 72 0b 4c 44 41 20 26 37 32 0d 01 7c |EE..r.LDA &72..|| 000001e0 0d 4a 53 52 20 26 46 46 45 45 0d 01 86 0b 4c 44 |.JSR &FFEE....LD| 000001f0 41 20 26 37 33 0d 01 90 0d 4a 53 52 20 26 46 46 |A &73....JSR &FF| 00000200 63 6f 6e 74 0d 02 8a 11 5c 20 52 65 63 6f 6e 73 |cont....\ Recons| 00000210 74 72 75 63 74 0d 02 94 12 5c 20 66 72 6f 6d 20 |truct....\ from | 00000220 ef 20 63 6f 64 65 73 0d 02 9e 0b 2e 64 65 63 6f |. codes.....deco| 00000230 6d 70 0d 02 a8 0a 4c 44 41 20 23 30 0d 02 b2 0b |mp....LDA #0....| 00000240 53 54 41 20 26 37 30 0d 02 bc 0c 4c 44 41 20 23 |STA &70....LDA #| 00000250 26 33 30 0d 02 c6 0b 53 54 41 20 26 37 31 0d 02 |&30....STA &71..| 00000260 d0 0b 4c 44 41 20 23 33 31 0d 02 da 0d 4a 53 52 |..LDA #31....JSR| 00000270 20 26 46 46 45 45 0d 02 e4 0a 4c 44 41 20 23 30 | &FFEE....LDA #0| 00000280 0d 02 ee 0d 4a 53 52 20 26 46 46 45 45 0d 02 f8 |....JSR &FFEE...| 00000290 0d 4a 53 52 20 26 46 46 45 45 0d 03 02 0a 4c 44 |.JSR &FFEE....LD| 000002a0 59 20 23 30 0d 03 0c 0b 4c 44 41 20 26 37 34 0d |Y #0....LDA &74.| 000002b0 03 16 0b 53 54 41 20 26 37 32 0d 03 20 0b 4c 44 |...STA &72.. .LD| 000002c0 41 20 26 37 35 0d 03 2a 0b 53 54 41 20 26 37 33 |A &75..*.STA &73| 000002d0 0d 03 34 0a 4c 44 59 20 23 30 0d 03 3e 0a 2e 6c |..4.LDY #0..>..l| 000002e0 6f 6f 70 32 0d 03 48 0f 4c 44 41 20 28 26 37 30 |oop2..H.LDA (&70| 000002f0 29 2c 59 0d 03 52 0d 4a 53 52 20 26 46 46 45 45 |),Y..R.JSR &FFEE| 00000300 0d 03 5c 0b 44 45 43 20 26 37 32 0d 03 66 0b 4c |..\.DEC &72..f.L| 00000310 44 41 20 26 37 32 0d 03 70 0c 42 45 51 20 73 65 |DA &72..p.BEQ se| 00000320 74 32 0d 03 7a 08 2e 72 65 74 0d 03 84 07 49 4e |t2..z..ret....IN| 00000330 59 0d 03 8e 0d 42 4e 45 20 6c 6f 6f 70 32 0d 03 |Y....BNE loop2..| 00000340 98 0b 49 4e 43 20 26 37 31 0d 03 a2 0b 4c 44 41 |..INC &71....LDA| 00000350 20 26 37 33 0d 03 ac 0d 42 4e 45 20 6c 6f 6f 70 | &73....BNE loop| 00000360 32 0d 03 b6 0c 2e 72 74 73 20 52 54 53 0d 03 c0 |2.....rts RTS...| 00000370 09 2e 73 65 74 32 0d 03 ca 0b 4c 44 41 20 23 34 |..set2....LDA #4| 00000380 30 0d 03 d4 0b 53 54 41 20 26 37 32 0d 03 de 0b |0....STA &72....| 00000390 44 45 43 20 26 37 33 0d 03 e8 0b 42 45 51 20 72 |DEC &73....BEQ r| 000003a0 74 73 0d 03 f2 0b 4a 4d 50 20 72 65 74 0d 03 fc |ts....JMP ret...| 000003b0 05 5d 0d 04 06 05 ed 0d 04 10 05 e1 0d 04 1a 05 |.]..............| 000003c0 20 0d 04 24 0b dd f2 69 6d 61 67 65 0d 04 2e 15 | ..$...image....| 000003d0 ef 20 32 33 2c 31 2c 32 3b 30 3b 30 3b 30 3b 30 |. 23,1,2;0;0;0;0| 000003e0 3b 0d 04 38 0a 3f 26 44 30 3d 32 0d 04 42 22 f4 |;..8.?&D0=2..B".| 000003f0 20 53 74 61 74 69 63 20 63 75 72 73 6f 72 20 2f | Static cursor /| 00000400 20 6e 6f 20 73 63 72 6f 6c 6c 69 6e 67 0d 04 4c | no scrolling..L| 00000410 0c e3 58 3d 31 b8 20 33 32 0d 04 56 31 f1 20 22 |..X=1. 32..V1. "| 00000420 54 68 69 73 20 69 73 20 61 6e 20 65 78 61 6d 70 |This is an examp| 00000430 6c 65 20 6f 66 20 74 68 65 20 56 44 55 20 63 6f |le of the VDU co| 00000440 6d 70 72 65 73 73 6f 72 22 3b 0d 04 60 05 ed 0d |mpressor";..`...| 00000450 04 6a 05 e1 0d ff |.j....| 00000456
CPROG1.m0
CPROG1.m1
CPROG1.m2
CPROG1.m4
CPROG1.m5
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