Home » CEEFAX disks » telesoftware17.adl » 25-08-89/CompTXT
25-08-89/CompTXT
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 » CEEFAX disks » telesoftware17.adl |
| Filename: | 25-08-89/CompTXT |
| Read OK: | ✔ |
| File size: | 04A7 bytes |
| Load address: | 43206576 |
| Exec address: | 54706D6F |
File contents
Help file to go with LDPIC-S and SVPIC-S ======================================== These two files allow graphic screens to be saved to disc in a very efficient manner. They should allow approximatly 600k of data to be stored within about 200k of disc space. The compacting program called SVPIC (generated by running SVPIC-S) is written in machine code and will compact a graphics screen several times over until it makes a clean pass without compacting it any further. The compacter also saves details on the current mode and palette settings. These are used by the loader program LDPIC (generated by running LDPIC-S) to ensure that the screen is loaded into the correct mode and that all the colours are what they should be. Using SVPIC =========== You will need the screen picture you wish to compress and the SVPIC code on the same disc. If the screen is called 'SCRN' and is in mode 1 it could be compressed with the following short program: 10 MODE 1 20 *LOAD SCRN 3000 30 *SVPIC SCOMPCT Using LDPIC =========== Ensure that the LDPIC code is on the same disc and enter: *LDPIC SCOMPCT Assuming that SCOMPCT is the name of the file to be loaded back in.
00000000 0d 0d 0d 48 65 6c 70 20 66 69 6c 65 20 74 6f 20 |...Help file to | 00000010 67 6f 20 77 69 74 68 20 4c 44 50 49 43 2d 53 20 |go with LDPIC-S | 00000020 61 6e 64 20 53 56 50 49 43 2d 53 0d 3d 3d 3d 3d |and SVPIC-S.====| 00000030 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================| * 00000050 3d 3d 3d 3d 0d 0d 20 54 68 65 73 65 20 74 77 6f |====.. These two| 00000060 20 66 69 6c 65 73 20 61 6c 6c 6f 77 20 67 72 61 | files allow gra| 00000070 70 68 69 63 20 73 63 72 65 65 6e 73 20 74 6f 20 |phic screens to | 00000080 62 65 20 73 61 76 65 64 20 74 6f 20 64 69 73 63 |be saved to disc| 00000090 20 69 6e 20 61 20 76 65 72 79 0d 65 66 66 69 63 | in a very.effic| 000000a0 69 65 6e 74 20 6d 61 6e 6e 65 72 2e 20 20 54 68 |ient manner. Th| 000000b0 65 79 20 73 68 6f 75 6c 64 20 61 6c 6c 6f 77 20 |ey should allow | 000000c0 61 70 70 72 6f 78 69 6d 61 74 6c 79 20 36 30 30 |approximatly 600| 000000d0 6b 20 6f 66 20 64 61 74 61 20 74 6f 20 62 65 0d |k of data to be.| 000000e0 73 74 6f 72 65 64 20 77 69 74 68 69 6e 20 61 62 |stored within ab| 000000f0 6f 75 74 20 32 30 30 6b 20 6f 66 20 64 69 73 63 |out 200k of disc| 00000100 20 73 70 61 63 65 2e 0d 0d 20 54 68 65 20 63 6f | space... The co| 00000110 6d 70 61 63 74 69 6e 67 20 70 72 6f 67 72 61 6d |mpacting program| 00000120 20 63 61 6c 6c 65 64 20 53 56 50 49 43 20 28 67 | called SVPIC (g| 00000130 65 6e 65 72 61 74 65 64 20 62 79 20 72 75 6e 6e |enerated by runn| 00000140 69 6e 67 20 53 56 50 49 43 2d 53 29 20 69 73 0d |ing SVPIC-S) is.| 00000150 77 72 69 74 74 65 6e 20 69 6e 20 6d 61 63 68 69 |written in machi| 00000160 6e 65 20 63 6f 64 65 20 61 6e 64 20 77 69 6c 6c |ne code and will| 00000170 20 63 6f 6d 70 61 63 74 20 61 20 67 72 61 70 68 | compact a graph| 00000180 69 63 73 20 73 63 72 65 65 6e 20 73 65 76 65 72 |ics screen sever| 00000190 61 6c 20 74 69 6d 65 73 0d 6f 76 65 72 20 75 6e |al times.over un| 000001a0 74 69 6c 20 69 74 20 6d 61 6b 65 73 20 61 20 63 |til it makes a c| 000001b0 6c 65 61 6e 20 70 61 73 73 20 77 69 74 68 6f 75 |lean pass withou| 000001c0 74 20 63 6f 6d 70 61 63 74 69 6e 67 20 69 74 20 |t compacting it | 000001d0 61 6e 79 20 66 75 72 74 68 65 72 2e 20 20 54 68 |any further. Th| 000001e0 65 0d 63 6f 6d 70 61 63 74 65 72 20 61 6c 73 6f |e.compacter also| 000001f0 20 73 61 76 65 73 20 64 65 74 61 69 6c 73 20 6f | saves details o| 00000200 6e 20 74 68 65 20 63 75 72 72 65 6e 74 20 6d 6f |n the current mo| 00000210 64 65 20 61 6e 64 20 70 61 6c 65 74 74 65 20 73 |de and palette s| 00000220 65 74 74 69 6e 67 73 2e 20 0d 54 68 65 73 65 20 |ettings. .These | 00000230 61 72 65 20 75 73 65 64 20 62 79 20 74 68 65 20 |are used by the | 00000240 6c 6f 61 64 65 72 20 70 72 6f 67 72 61 6d 20 4c |loader program L| 00000250 44 50 49 43 20 28 67 65 6e 65 72 61 74 65 64 20 |DPIC (generated | 00000260 62 79 20 72 75 6e 6e 69 6e 67 20 4c 44 50 49 43 |by running LDPIC| 00000270 2d 53 29 0d 74 6f 20 65 6e 73 75 72 65 20 74 68 |-S).to ensure th| 00000280 61 74 20 74 68 65 20 73 63 72 65 65 6e 20 69 73 |at the screen is| 00000290 20 6c 6f 61 64 65 64 20 69 6e 74 6f 20 74 68 65 | loaded into the| 000002a0 20 63 6f 72 72 65 63 74 20 6d 6f 64 65 20 61 6e | correct mode an| 000002b0 64 20 74 68 61 74 20 61 6c 6c 20 74 68 65 0d 63 |d that all the.c| 000002c0 6f 6c 6f 75 72 73 20 61 72 65 20 77 68 61 74 20 |olours are what | 000002d0 74 68 65 79 20 73 68 6f 75 6c 64 20 62 65 2e 0d |they should be..| 000002e0 0d 0d 55 73 69 6e 67 20 53 56 50 49 43 0d 3d 3d |..Using SVPIC.==| 000002f0 3d 3d 3d 3d 3d 3d 3d 3d 3d 0d 0d 20 59 6f 75 20 |=========.. You | 00000300 77 69 6c 6c 20 6e 65 65 64 20 74 68 65 20 73 63 |will need the sc| 00000310 72 65 65 6e 20 70 69 63 74 75 72 65 20 79 6f 75 |reen picture you| 00000320 20 77 69 73 68 20 74 6f 20 63 6f 6d 70 72 65 73 | wish to compres| 00000330 73 20 61 6e 64 20 74 68 65 20 53 56 50 49 43 20 |s and the SVPIC | 00000340 63 6f 64 65 0d 6f 6e 20 74 68 65 20 73 61 6d 65 |code.on the same| 00000350 20 64 69 73 63 2e 20 20 49 66 20 74 68 65 20 73 | disc. If the s| 00000360 63 72 65 65 6e 20 69 73 20 63 61 6c 6c 65 64 20 |creen is called | 00000370 27 53 43 52 4e 27 20 61 6e 64 20 69 73 20 69 6e |'SCRN' and is in| 00000380 20 6d 6f 64 65 20 31 20 69 74 0d 63 6f 75 6c 64 | mode 1 it.could| 00000390 20 62 65 20 63 6f 6d 70 72 65 73 73 65 64 20 77 | be compressed w| 000003a0 69 74 68 20 74 68 65 20 66 6f 6c 6c 6f 77 69 6e |ith the followin| 000003b0 67 20 73 68 6f 72 74 20 70 72 6f 67 72 61 6d 3a |g short program:| 000003c0 0d 0d 20 31 30 20 4d 4f 44 45 20 31 0d 20 32 30 |.. 10 MODE 1. 20| 000003d0 20 2a 4c 4f 41 44 20 53 43 52 4e 20 33 30 30 30 | *LOAD SCRN 3000| 000003e0 0d 20 33 30 20 2a 53 56 50 49 43 20 53 43 4f 4d |. 30 *SVPIC SCOM| 000003f0 50 43 54 20 0d 0d 0d 55 73 69 6e 67 20 4c 44 50 |PCT ...Using LDP| 00000400 49 43 0d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 0d 0d |IC.===========..| 00000410 20 45 6e 73 75 72 65 20 74 68 61 74 20 74 68 65 | Ensure that the| 00000420 20 4c 44 50 49 43 20 63 6f 64 65 20 69 73 20 6f | LDPIC code is o| 00000430 6e 20 74 68 65 20 73 61 6d 65 20 64 69 73 63 20 |n the same disc | 00000440 61 6e 64 20 65 6e 74 65 72 3a 0d 0d 20 2a 4c 44 |and enter:.. *LD| 00000450 50 49 43 20 53 43 4f 4d 50 43 54 0d 0d 41 73 73 |PIC SCOMPCT..Ass| 00000460 75 6d 69 6e 67 20 74 68 61 74 20 53 43 4f 4d 50 |uming that SCOMP| 00000470 43 54 20 69 73 20 74 68 65 20 6e 61 6d 65 20 6f |CT is the name o| 00000480 66 20 74 68 65 20 66 69 6c 65 20 74 6f 20 62 65 |f the file to be| 00000490 20 6c 6f 61 64 65 64 20 62 61 63 6b 20 69 6e 2e | loaded back in.| 000004a0 0d 0d 0d 0d 0d 0d 0d |.......| 000004a7
25-08-89/CompTXT.m0
25-08-89/CompTXT.m1
25-08-89/CompTXT.m2
25-08-89/CompTXT.m4
25-08-89/CompTXT.m5
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