Home » Archimedes archive » Acorn User » AU 1996-12 B.adf » Features » PCA/ReadFirst
PCA/ReadFirst
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 » Acorn User » AU 1996-12 B.adf » Features |
| Filename: | PCA/ReadFirst |
| Read OK: | ✔ |
| File size: | 088F bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
PCA Example archive ------------------- This archive contains details of the Plug-In-Compliant Application (PCA) messaging standard. This standard is designed to facilitate the sharing of common data object types residing in dynamic areas between applications. Compliance with the standard will enable your applications to be used with any other which also complies with the standard. The Archive includes an example sprite viewing and painting program called !Spaint which conforms to the PCA standard. This program is provided as an example only. It has not gone through our usual bug-testing and quality control process and therefore should not be considered anything other than as an example of a very simple PCA implimentation. The Composition and ProArt24 demos also support PCA Using the PCA in your programs ------------------------------ You are invited to add the PCA standard to your programs and to create PCA 'applets'. However, before publishing or distributing (in any form) a program which makes use of the PCA standard you must first obtain a license to do so from Clares Micro Supplies. The license is currently free of charge. Licensing the PCA standard allows us to keep track of who is using it, inform them of changes to the standard and provide support in the case of a problem. PCA Logo -------- The PCA logo (see !Spaint.Sprites22) may be used by licensed PCA developers to indicate PCA compliancy. Licensed developers must not use the logo to suggest any Clares approval or branding for their products. Contacts -------- DJackson@clares.demon.co.uk - Licensing details and project coordination. rdavison@es.co.nz - Author of the standard. Disclamer --------- This standard is supplied 'as is'; neither Clares nor the author of the standard make any warranty, whether express or implied, as to the merchatantability of the software or standard or its fitness for any purpose. In no circumstances will Clares or the author of the standard be liable for any damage, loss of profits, goodwill or for any indirect or inconsequential loss arising from the use of this standard or software. Receipt of this file is deemed acceptance of these terms.
00000000 50 43 41 20 45 78 61 6d 70 6c 65 20 61 72 63 68 |PCA Example arch| 00000010 69 76 65 0a 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |ive.------------| 00000020 2d 2d 2d 2d 2d 2d 2d 0a 54 68 69 73 20 61 72 63 |-------.This arc| 00000030 68 69 76 65 20 63 6f 6e 74 61 69 6e 73 20 64 65 |hive contains de| 00000040 74 61 69 6c 73 20 6f 66 20 74 68 65 20 50 6c 75 |tails of the Plu| 00000050 67 2d 49 6e 2d 43 6f 6d 70 6c 69 61 6e 74 20 41 |g-In-Compliant A| 00000060 70 70 6c 69 63 61 74 69 6f 6e 20 28 50 43 41 29 |pplication (PCA)| 00000070 0a 6d 65 73 73 61 67 69 6e 67 20 73 74 61 6e 64 |.messaging stand| 00000080 61 72 64 2e 20 54 68 69 73 20 73 74 61 6e 64 61 |ard. This standa| 00000090 72 64 20 69 73 20 64 65 73 69 67 6e 65 64 20 74 |rd is designed t| 000000a0 6f 20 66 61 63 69 6c 69 74 61 74 65 20 74 68 65 |o facilitate the| 000000b0 20 73 68 61 72 69 6e 67 20 6f 66 0a 63 6f 6d 6d | sharing of.comm| 000000c0 6f 6e 20 64 61 74 61 20 6f 62 6a 65 63 74 20 74 |on data object t| 000000d0 79 70 65 73 20 72 65 73 69 64 69 6e 67 20 69 6e |ypes residing in| 000000e0 20 64 79 6e 61 6d 69 63 20 61 72 65 61 73 20 62 | dynamic areas b| 000000f0 65 74 77 65 65 6e 20 61 70 70 6c 69 63 61 74 69 |etween applicati| 00000100 6f 6e 73 2e 0a 0a 43 6f 6d 70 6c 69 61 6e 63 65 |ons...Compliance| 00000110 20 77 69 74 68 20 74 68 65 20 73 74 61 6e 64 61 | with the standa| 00000120 72 64 20 77 69 6c 6c 20 65 6e 61 62 6c 65 20 79 |rd will enable y| 00000130 6f 75 72 20 61 70 70 6c 69 63 61 74 69 6f 6e 73 |our applications| 00000140 20 74 6f 20 62 65 20 75 73 65 64 20 77 69 74 68 | to be used with| 00000150 20 61 6e 79 0a 6f 74 68 65 72 20 77 68 69 63 68 | any.other which| 00000160 20 61 6c 73 6f 20 63 6f 6d 70 6c 69 65 73 20 77 | also complies w| 00000170 69 74 68 20 74 68 65 20 73 74 61 6e 64 61 72 64 |ith the standard| 00000180 2e 0a 0a 54 68 65 20 41 72 63 68 69 76 65 20 69 |...The Archive i| 00000190 6e 63 6c 75 64 65 73 20 61 6e 20 65 78 61 6d 70 |ncludes an examp| 000001a0 6c 65 20 73 70 72 69 74 65 20 76 69 65 77 69 6e |le sprite viewin| 000001b0 67 20 61 6e 64 20 70 61 69 6e 74 69 6e 67 20 70 |g and painting p| 000001c0 72 6f 67 72 61 6d 20 63 61 6c 6c 65 64 0a 21 53 |rogram called.!S| 000001d0 70 61 69 6e 74 20 77 68 69 63 68 20 63 6f 6e 66 |paint which conf| 000001e0 6f 72 6d 73 20 74 6f 20 74 68 65 20 50 43 41 20 |orms to the PCA | 000001f0 73 74 61 6e 64 61 72 64 2e 20 54 68 69 73 20 70 |standard. This p| 00000200 72 6f 67 72 61 6d 20 69 73 20 70 72 6f 76 69 64 |rogram is provid| 00000210 65 64 20 61 73 20 61 6e 0a 65 78 61 6d 70 6c 65 |ed as an.example| 00000220 20 6f 6e 6c 79 2e 20 49 74 20 68 61 73 20 6e 6f | only. It has no| 00000230 74 20 67 6f 6e 65 20 74 68 72 6f 75 67 68 20 6f |t gone through o| 00000240 75 72 20 75 73 75 61 6c 20 62 75 67 2d 74 65 73 |ur usual bug-tes| 00000250 74 69 6e 67 20 61 6e 64 20 71 75 61 6c 69 74 79 |ting and quality| 00000260 20 63 6f 6e 74 72 6f 6c 0a 70 72 6f 63 65 73 73 | control.process| 00000270 20 61 6e 64 20 74 68 65 72 65 66 6f 72 65 20 73 | and therefore s| 00000280 68 6f 75 6c 64 20 6e 6f 74 20 62 65 20 63 6f 6e |hould not be con| 00000290 73 69 64 65 72 65 64 20 61 6e 79 74 68 69 6e 67 |sidered anything| 000002a0 20 6f 74 68 65 72 20 74 68 61 6e 20 61 73 20 61 | other than as a| 000002b0 6e 0a 65 78 61 6d 70 6c 65 20 6f 66 20 61 20 76 |n.example of a v| 000002c0 65 72 79 20 73 69 6d 70 6c 65 20 50 43 41 20 69 |ery simple PCA i| 000002d0 6d 70 6c 69 6d 65 6e 74 61 74 69 6f 6e 2e 0a 0a |mplimentation...| 000002e0 54 68 65 20 43 6f 6d 70 6f 73 69 74 69 6f 6e 20 |The Composition | 000002f0 61 6e 64 20 50 72 6f 41 72 74 32 34 20 64 65 6d |and ProArt24 dem| 00000300 6f 73 20 61 6c 73 6f 20 73 75 70 70 6f 72 74 20 |os also support | 00000310 50 43 41 0a 0a 55 73 69 6e 67 20 74 68 65 20 50 |PCA..Using the P| 00000320 43 41 20 69 6e 20 79 6f 75 72 20 70 72 6f 67 72 |CA in your progr| 00000330 61 6d 73 0a 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |ams.------------| 00000340 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------| 00000350 2d 2d 0a 59 6f 75 20 61 72 65 20 69 6e 76 69 74 |--.You are invit| 00000360 65 64 20 74 6f 20 61 64 64 20 74 68 65 20 50 43 |ed to add the PC| 00000370 41 20 73 74 61 6e 64 61 72 64 20 74 6f 20 79 6f |A standard to yo| 00000380 75 72 20 70 72 6f 67 72 61 6d 73 20 61 6e 64 20 |ur programs and | 00000390 74 6f 20 63 72 65 61 74 65 20 50 43 41 0a 27 61 |to create PCA.'a| 000003a0 70 70 6c 65 74 73 27 2e 20 48 6f 77 65 76 65 72 |pplets'. However| 000003b0 2c 20 62 65 66 6f 72 65 20 70 75 62 6c 69 73 68 |, before publish| 000003c0 69 6e 67 20 6f 72 20 64 69 73 74 72 69 62 75 74 |ing or distribut| 000003d0 69 6e 67 20 28 69 6e 20 61 6e 79 20 66 6f 72 6d |ing (in any form| 000003e0 29 20 61 20 70 72 6f 67 72 61 6d 0a 77 68 69 63 |) a program.whic| 000003f0 68 20 6d 61 6b 65 73 20 75 73 65 20 6f 66 20 74 |h makes use of t| 00000400 68 65 20 50 43 41 20 73 74 61 6e 64 61 72 64 20 |he PCA standard | 00000410 79 6f 75 20 6d 75 73 74 20 66 69 72 73 74 20 6f |you must first o| 00000420 62 74 61 69 6e 20 61 20 6c 69 63 65 6e 73 65 20 |btain a license | 00000430 74 6f 20 64 6f 20 73 6f 0a 66 72 6f 6d 20 43 6c |to do so.from Cl| 00000440 61 72 65 73 20 4d 69 63 72 6f 20 53 75 70 70 6c |ares Micro Suppl| 00000450 69 65 73 2e 0a 0a 54 68 65 20 6c 69 63 65 6e 73 |ies...The licens| 00000460 65 20 69 73 20 63 75 72 72 65 6e 74 6c 79 20 66 |e is currently f| 00000470 72 65 65 20 6f 66 20 63 68 61 72 67 65 2e 20 4c |ree of charge. L| 00000480 69 63 65 6e 73 69 6e 67 20 74 68 65 20 50 43 41 |icensing the PCA| 00000490 20 73 74 61 6e 64 61 72 64 20 61 6c 6c 6f 77 73 | standard allows| 000004a0 20 75 73 0a 74 6f 20 6b 65 65 70 20 74 72 61 63 | us.to keep trac| 000004b0 6b 20 6f 66 20 77 68 6f 20 69 73 20 75 73 69 6e |k of who is usin| 000004c0 67 20 69 74 2c 20 69 6e 66 6f 72 6d 20 74 68 65 |g it, inform the| 000004d0 6d 20 6f 66 20 63 68 61 6e 67 65 73 20 74 6f 20 |m of changes to | 000004e0 74 68 65 20 73 74 61 6e 64 61 72 64 20 61 6e 64 |the standard and| 000004f0 0a 70 72 6f 76 69 64 65 20 73 75 70 70 6f 72 74 |.provide support| 00000500 20 69 6e 20 74 68 65 20 63 61 73 65 20 6f 66 20 | in the case of | 00000510 61 20 70 72 6f 62 6c 65 6d 2e 0a 0a 50 43 41 20 |a problem...PCA | 00000520 4c 6f 67 6f 0a 2d 2d 2d 2d 2d 2d 2d 2d 0a 54 68 |Logo.--------.Th| 00000530 65 20 50 43 41 20 6c 6f 67 6f 20 28 73 65 65 20 |e PCA logo (see | 00000540 21 53 70 61 69 6e 74 2e 53 70 72 69 74 65 73 32 |!Spaint.Sprites2| 00000550 32 29 20 6d 61 79 20 62 65 20 75 73 65 64 20 62 |2) may be used b| 00000560 79 20 6c 69 63 65 6e 73 65 64 20 50 43 41 20 64 |y licensed PCA d| 00000570 65 76 65 6c 6f 70 65 72 73 0a 74 6f 20 69 6e 64 |evelopers.to ind| 00000580 69 63 61 74 65 20 50 43 41 20 63 6f 6d 70 6c 69 |icate PCA compli| 00000590 61 6e 63 79 2e 20 4c 69 63 65 6e 73 65 64 20 64 |ancy. Licensed d| 000005a0 65 76 65 6c 6f 70 65 72 73 20 6d 75 73 74 20 6e |evelopers must n| 000005b0 6f 74 20 75 73 65 20 74 68 65 20 6c 6f 67 6f 20 |ot use the logo | 000005c0 74 6f 20 73 75 67 67 65 73 74 0a 61 6e 79 20 43 |to suggest.any C| 000005d0 6c 61 72 65 73 20 61 70 70 72 6f 76 61 6c 20 6f |lares approval o| 000005e0 72 20 62 72 61 6e 64 69 6e 67 20 66 6f 72 20 74 |r branding for t| 000005f0 68 65 69 72 20 70 72 6f 64 75 63 74 73 2e 0a 0a |heir products...| 00000600 43 6f 6e 74 61 63 74 73 0a 2d 2d 2d 2d 2d 2d 2d |Contacts.-------| 00000610 2d 0a 44 4a 61 63 6b 73 6f 6e 40 63 6c 61 72 65 |-.DJackson@clare| 00000620 73 2e 64 65 6d 6f 6e 2e 63 6f 2e 75 6b 20 2d 20 |s.demon.co.uk - | 00000630 4c 69 63 65 6e 73 69 6e 67 20 64 65 74 61 69 6c |Licensing detail| 00000640 73 20 61 6e 64 20 70 72 6f 6a 65 63 74 20 63 6f |s and project co| 00000650 6f 72 64 69 6e 61 74 69 6f 6e 2e 0a 72 64 61 76 |ordination..rdav| 00000660 69 73 6f 6e 40 65 73 2e 63 6f 2e 6e 7a 20 20 20 |ison@es.co.nz | 00000670 20 20 20 20 20 20 20 20 2d 20 41 75 74 68 6f 72 | - Author| 00000680 20 6f 66 20 74 68 65 20 73 74 61 6e 64 61 72 64 | of the standard| 00000690 2e 0a 0a 0a 44 69 73 63 6c 61 6d 65 72 0a 2d 2d |....Disclamer.--| 000006a0 2d 2d 2d 2d 2d 2d 2d 0a 54 68 69 73 20 73 74 61 |-------.This sta| 000006b0 6e 64 61 72 64 20 69 73 20 73 75 70 70 6c 69 65 |ndard is supplie| 000006c0 64 20 27 61 73 20 69 73 27 3b 20 6e 65 69 74 68 |d 'as is'; neith| 000006d0 65 72 20 43 6c 61 72 65 73 20 6e 6f 72 20 74 68 |er Clares nor th| 000006e0 65 20 61 75 74 68 6f 72 20 6f 66 20 74 68 65 20 |e author of the | 000006f0 73 74 61 6e 64 61 72 64 0a 6d 61 6b 65 20 61 6e |standard.make an| 00000700 79 20 77 61 72 72 61 6e 74 79 2c 20 77 68 65 74 |y warranty, whet| 00000710 68 65 72 20 65 78 70 72 65 73 73 20 6f 72 20 69 |her express or i| 00000720 6d 70 6c 69 65 64 2c 20 61 73 20 74 6f 20 74 68 |mplied, as to th| 00000730 65 20 6d 65 72 63 68 61 74 61 6e 74 61 62 69 6c |e merchatantabil| 00000740 69 74 79 20 6f 66 0a 74 68 65 20 73 6f 66 74 77 |ity of.the softw| 00000750 61 72 65 20 6f 72 20 73 74 61 6e 64 61 72 64 20 |are or standard | 00000760 6f 72 20 69 74 73 20 66 69 74 6e 65 73 73 20 66 |or its fitness f| 00000770 6f 72 20 61 6e 79 20 70 75 72 70 6f 73 65 2e 0a |or any purpose..| 00000780 0a 49 6e 20 6e 6f 20 63 69 72 63 75 6d 73 74 61 |.In no circumsta| 00000790 6e 63 65 73 20 77 69 6c 6c 20 43 6c 61 72 65 73 |nces will Clares| 000007a0 20 6f 72 20 74 68 65 20 61 75 74 68 6f 72 20 6f | or the author o| 000007b0 66 20 74 68 65 20 73 74 61 6e 64 61 72 64 20 62 |f the standard b| 000007c0 65 20 6c 69 61 62 6c 65 20 66 6f 72 0a 61 6e 79 |e liable for.any| 000007d0 20 64 61 6d 61 67 65 2c 20 6c 6f 73 73 20 6f 66 | damage, loss of| 000007e0 20 70 72 6f 66 69 74 73 2c 20 67 6f 6f 64 77 69 | profits, goodwi| 000007f0 6c 6c 20 6f 72 20 66 6f 72 20 61 6e 79 20 69 6e |ll or for any in| 00000800 64 69 72 65 63 74 20 6f 72 20 69 6e 63 6f 6e 73 |direct or incons| 00000810 65 71 75 65 6e 74 69 61 6c 0a 6c 6f 73 73 20 61 |equential.loss a| 00000820 72 69 73 69 6e 67 20 66 72 6f 6d 20 74 68 65 20 |rising from the | 00000830 75 73 65 20 6f 66 20 74 68 69 73 20 73 74 61 6e |use of this stan| 00000840 64 61 72 64 20 6f 72 20 73 6f 66 74 77 61 72 65 |dard or software| 00000850 2e 0a 0a 52 65 63 65 69 70 74 20 6f 66 20 74 68 |...Receipt of th| 00000860 69 73 20 66 69 6c 65 20 69 73 20 64 65 65 6d 65 |is file is deeme| 00000870 64 20 61 63 63 65 70 74 61 6e 63 65 20 6f 66 20 |d acceptance of | 00000880 74 68 65 73 65 20 74 65 72 6d 73 2e 0a 0a 0a |these terms....| 0000088f
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