Home » Archimedes archive » Micro User » MU 1991-09.adf » PD-Stuff » Utilities/!CRC/!Help

Utilities/!CRC/!Help

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 » Micro User » MU 1991-09.adf » PD-Stuff
Filename: Utilities/!CRC/!Help
Read OK:
File size: 0403 bytes
Load address: 0000
Exec address: 0000
File contents
!CRC - Perform a CRC check on your files
================================================
written by Paul Vigay                      �1990

This utility will calculate a 32bit CRC value for any given file.
To use, drag a file either into it's window, or onto it's icon.
You can adjust the length of the file by clicking on the left and right arrowicons, to allow for spurious bytes being added to the end of files after downloading from bulletin boards etc.
Click on OK to re-calculate the CRC value.

This file was written to benefit Micronet subscribers, who may verify
downloaded Telesoftware against a published checksum value.

If you have any comments and/or suggestions, or find any bugs I haven't
listed, then please contact me via the following sources:

        Paul Vigay C/O
        14 Victory Avenue,
        Horndean,
        Portsmouth,
        Hants. PO8 9PH
        England

        Prestel Mailbox  -  011152785
        Telecom Gold     -  80:BTG663
        'World of Cryton' BBs or 'Arcade' BBs - PAUL VIGAY
00000000  21 43 52 43 20 2d 20 50  65 72 66 6f 72 6d 20 61  |!CRC - Perform a|
00000010  20 43 52 43 20 63 68 65  63 6b 20 6f 6e 20 79 6f  | CRC check on yo|
00000020  75 72 20 66 69 6c 65 73  0a 3d 3d 3d 3d 3d 3d 3d  |ur files.=======|
00000030  3d 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 3d 3d 3d 3d 3d  |================|
*
00000050  3d 3d 3d 3d 3d 3d 3d 3d  3d 0a 77 72 69 74 74 65  |=========.writte|
00000060  6e 20 62 79 20 50 61 75  6c 20 56 69 67 61 79 20  |n by Paul Vigay |
00000070  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |                |
00000080  20 20 20 20 20 a9 31 39  39 30 0a 0a 54 68 69 73  |     .1990..This|
00000090  20 75 74 69 6c 69 74 79  20 77 69 6c 6c 20 63 61  | utility will ca|
000000a0  6c 63 75 6c 61 74 65 20  61 20 33 32 62 69 74 20  |lculate a 32bit |
000000b0  43 52 43 20 76 61 6c 75  65 20 66 6f 72 20 61 6e  |CRC value for an|
000000c0  79 20 67 69 76 65 6e 20  66 69 6c 65 2e 0a 54 6f  |y given file..To|
000000d0  20 75 73 65 2c 20 64 72  61 67 20 61 20 66 69 6c  | use, drag a fil|
000000e0  65 20 65 69 74 68 65 72  20 69 6e 74 6f 20 69 74  |e either into it|
000000f0  27 73 20 77 69 6e 64 6f  77 2c 20 6f 72 20 6f 6e  |'s window, or on|
00000100  74 6f 20 69 74 27 73 20  69 63 6f 6e 2e 0a 59 6f  |to it's icon..Yo|
00000110  75 20 63 61 6e 20 61 64  6a 75 73 74 20 74 68 65  |u can adjust the|
00000120  20 6c 65 6e 67 74 68 20  6f 66 20 74 68 65 20 66  | length of the f|
00000130  69 6c 65 20 62 79 20 63  6c 69 63 6b 69 6e 67 20  |ile by clicking |
00000140  6f 6e 20 74 68 65 20 6c  65 66 74 20 61 6e 64 20  |on the left and |
00000150  72 69 67 68 74 20 61 72  72 6f 77 69 63 6f 6e 73  |right arrowicons|
00000160  2c 20 74 6f 20 61 6c 6c  6f 77 20 66 6f 72 20 73  |, to allow for s|
00000170  70 75 72 69 6f 75 73 20  62 79 74 65 73 20 62 65  |purious bytes be|
00000180  69 6e 67 20 61 64 64 65  64 20 74 6f 20 74 68 65  |ing added to the|
00000190  20 65 6e 64 20 6f 66 20  66 69 6c 65 73 20 61 66  | end of files af|
000001a0  74 65 72 20 64 6f 77 6e  6c 6f 61 64 69 6e 67 20  |ter downloading |
000001b0  66 72 6f 6d 20 62 75 6c  6c 65 74 69 6e 20 62 6f  |from bulletin bo|
000001c0  61 72 64 73 20 65 74 63  2e 0a 43 6c 69 63 6b 20  |ards etc..Click |
000001d0  6f 6e 20 4f 4b 20 74 6f  20 72 65 2d 63 61 6c 63  |on OK to re-calc|
000001e0  75 6c 61 74 65 20 74 68  65 20 43 52 43 20 76 61  |ulate the CRC va|
000001f0  6c 75 65 2e 0a 0a 54 68  69 73 20 66 69 6c 65 20  |lue...This file |
00000200  77 61 73 20 77 72 69 74  74 65 6e 20 74 6f 20 62  |was written to b|
00000210  65 6e 65 66 69 74 20 4d  69 63 72 6f 6e 65 74 20  |enefit Micronet |
00000220  73 75 62 73 63 72 69 62  65 72 73 2c 20 77 68 6f  |subscribers, who|
00000230  20 6d 61 79 20 76 65 72  69 66 79 0a 64 6f 77 6e  | may verify.down|
00000240  6c 6f 61 64 65 64 20 54  65 6c 65 73 6f 66 74 77  |loaded Telesoftw|
00000250  61 72 65 20 61 67 61 69  6e 73 74 20 61 20 70 75  |are against a pu|
00000260  62 6c 69 73 68 65 64 20  63 68 65 63 6b 73 75 6d  |blished checksum|
00000270  20 76 61 6c 75 65 2e 0a  0a 49 66 20 79 6f 75 20  | value...If you |
00000280  68 61 76 65 20 61 6e 79  20 63 6f 6d 6d 65 6e 74  |have any comment|
00000290  73 20 61 6e 64 2f 6f 72  20 73 75 67 67 65 73 74  |s and/or suggest|
000002a0  69 6f 6e 73 2c 20 6f 72  20 66 69 6e 64 20 61 6e  |ions, or find an|
000002b0  79 20 62 75 67 73 20 49  20 68 61 76 65 6e 27 74  |y bugs I haven't|
000002c0  0a 6c 69 73 74 65 64 2c  20 74 68 65 6e 20 70 6c  |.listed, then pl|
000002d0  65 61 73 65 20 63 6f 6e  74 61 63 74 20 6d 65 20  |ease contact me |
000002e0  76 69 61 20 74 68 65 20  66 6f 6c 6c 6f 77 69 6e  |via the followin|
000002f0  67 20 73 6f 75 72 63 65  73 3a 0a 0a 20 20 20 20  |g sources:..    |
00000300  20 20 20 20 50 61 75 6c  20 56 69 67 61 79 20 43  |    Paul Vigay C|
00000310  2f 4f 0a 20 20 20 20 20  20 20 20 31 34 20 56 69  |/O.        14 Vi|
00000320  63 74 6f 72 79 20 41 76  65 6e 75 65 2c 0a 20 20  |ctory Avenue,.  |
00000330  20 20 20 20 20 20 48 6f  72 6e 64 65 61 6e 2c 0a  |      Horndean,.|
00000340  20 20 20 20 20 20 20 20  50 6f 72 74 73 6d 6f 75  |        Portsmou|
00000350  74 68 2c 0a 20 20 20 20  20 20 20 20 48 61 6e 74  |th,.        Hant|
00000360  73 2e 20 50 4f 38 20 39  50 48 0a 20 20 20 20 20  |s. PO8 9PH.     |
00000370  20 20 20 45 6e 67 6c 61  6e 64 0a 0a 20 20 20 20  |   England..    |
00000380  20 20 20 20 50 72 65 73  74 65 6c 20 4d 61 69 6c  |    Prestel Mail|
00000390  62 6f 78 20 20 2d 20 20  30 31 31 31 35 32 37 38  |box  -  01115278|
000003a0  35 0a 20 20 20 20 20 20  20 20 54 65 6c 65 63 6f  |5.        Teleco|
000003b0  6d 20 47 6f 6c 64 20 20  20 20 20 2d 20 20 38 30  |m Gold     -  80|
000003c0  3a 42 54 47 36 36 33 0a  20 20 20 20 20 20 20 20  |:BTG663.        |
000003d0  27 57 6f 72 6c 64 20 6f  66 20 43 72 79 74 6f 6e  |'World of Cryton|
000003e0  27 20 42 42 73 20 6f 72  20 27 41 72 63 61 64 65  |' BBs or 'Arcade|
000003f0  27 20 42 42 73 20 2d 20  50 41 55 4c 20 56 49 47  |' BBs - PAUL VIG|
00000400  41 59 0a                                          |AY.|
00000403