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Freeware/MaSK/!MaSK/!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 » Archimedes World » AW-1995-07-Disc2.adf » AW0795_2 |
| Filename: | Freeware/MaSK/!MaSK/!Help |
| Read OK: | ✔ |
| File size: | 1A9B bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
MaSK Version 0.33 (20 Feb 1995)
===============================
� Graham R King 1994,95
MaSK
====
MaSK is basically, a pseudo subliminal data amalgamator. Hmm..
In layman's terms and realistically, MaSK hides any file within an image or
a sound sample. Imagine dropping your favourite sound sample onto MaSK and
finding out that hidden within the audio data is an archive containing a
sample editing application! MaSK makes this a reality...
Disclaimer
==========
In no circumstances shall the author be liable for any damage, loss of
profits, time or data or any indirect or consequential loss rising out of the
use or inability to use this software.
Copyright / Distribution
========================
This application & all associated data are the exclusive copyright of Graham R
King, 1994, 1995.
However, it may be distributed freely on a non-profit making basis so long as
all the original files are included unmodified.
Introduction
============
For the uninitiated, the science of cryptology involves scrambling information
to prevent unauthorised persons viewing it. It's nothing new. In fact on every
computer platform you will find cryptographic software in one form or another.
Weaknesses of any individual encryption method aside,conventional cryptography
has one major disadvantage;even though prying eyes may not be able to decipher
encrypted data, it's pretty clear that the data has been altered by something.
However, MaSK is different...
Rather than using conventional cryptology to produce encrypted data, or cipher
text, MaSK adopts an entirely different approach. Certain file types, notably
graphics and sound files, have a certain amount of semi-redundant data into
which can be grafted concealed data which cannot be detected by a normal
perusal of the "host" file.
Using MaSK
==========
The best way to understand what mask does is to try it. Take a ~30K sound
sample and a small text file. Follow the procedure outlined below and save the
resultant sample. Play both samples in a sample editor - no difference. Clear
all data in MaSK by clicking on "Clear" and drop the newly created sample into
MaSK as you did with the original. A save box will appear and the resultant
text file will be the one you originally had. It's quite amazing to see it
work for the first time! ..well it amazed me and I wrote it..
Encrypting.
To encrypt a binary file a host file needed. Drag the host file from the filer
window to the "Host Input" icon of MaSK's main window.
Do the same with the binary file and then click SELECT on "Encrypt".A save box
will be opened and the resultant file will contain the masked data.
The filetype and size of the binary file are also encrypted with in the host.
Decrypting.
If a host file contains masked data a save box will be displayed when it's
dragged to the "Host Input" icon as with encrypting.
Important Notes Concerning Samples
==================================
Samples can be stored in several different formats, basically there are linear
samples and logarithmic samples. As a rule, MaSK has no idea of the format of
any particular sample.
When a sample is loaded into MaSK as a host file, MaSK assumes which data
format should be used based on the filetype:
Armadeus (&D3C) are assumed to be Linear samples.
TFF (Tracker File Format) (&CB5) are assumed to be Logarithmic.
This may not always be the case however, so MaSK provides you with a mechanism
of specifying the sample data format. There is an icon in the host information
box that, for sprites, reads "Mode:". When a sample is loaded this changes to
"Format:". Clicking any button over the adjacent icon will display a list of
sample data formats and the applicable one may be selected.
If you are not sure of the sample format, load the sample into a sample player
after it has been masked. If a lot of distortion occurs at the start of the
sample then you have selected the wrong sample data format. Choose another and
mask the sample again.
When a sample containing masked data is loaded, MaSK automatically detects the
sample data format.
Things To Note
==============
Samples cope with this masking process much better than Sprites and also give
a higher host/data ratio.
Due to the "noise" caused in host files, it is unwise to use sprites that
contain large areas one colour as hosts. Much less noticeable effects will
result in digitised images that have been error corrected. No noticeable
reduction in image quality will occur with black and white digitised images
that have been Floyd-Steinberg error corrected for example, although even this
would depend on the image.
ENGiNE
======
This is the module that the application uses to mask data. It's coded to be
very quick. The actual encryption is done when the user clicks on "Encrypt"
and is finished before the save box opens.
A typical example: (ARM 2, mode 0)
A full mode 36 screen dump (~220K) takes ~23 centi-second to mask.
That's ~1Mb a second encryption.
Overview
========
MaSK can currently handle several different host filetypes :
� 256 Colour Sprites (&FF9)
� Armadeus Sound Samples (&D3C)
� TFF Sound Samples (&CB5)
Any binary file can be "masked" within a host file.The only constraint is file
size. Different host types have different "masked" data capacities. The total
capacity for any one particular host file is also dependant on its length.
Capacities for currently recognized host types are :
Host Type Max Capacity
--------- ------------
256 Colour Sprites (&FF9) 12.5%
Armadeus Samples (&D3C) 25.0%
TFF Sound Samples (&CB5) 25.0%
For example, a 200K sample could hold a 50K binary file. This binary file
however, could be an archive, thus giving a new, higher, pseudo capacity.
Another example, full 800K samples are quite common, neatly filling one disc.
Such a sample could hold ~200K of data, if an archive was used, > 400K of data
could be hidden!
Help
====
More detailed help on the actual application functionality can be obtained
through the resident interactive help application.
Credits
=======
Programming : Graham R King
Original Concept : Andy George
Quality Assurance : Paul Thornton
Grant Jennings
Darren Wotten
The Author
==========
If you have any questions, bug reports or suggestions for improvements please
do not hesitate to contact the author at the address below.
Graham King
54 Neath road,
St. Judes,
Plymouth.
Devon.
PL4 8TG
00000000 0a 20 4d 61 53 4b 20 56 65 72 73 69 6f 6e 20 30 |. MaSK Version 0| 00000010 2e 33 33 20 28 32 30 20 46 65 62 20 31 39 39 35 |.33 (20 Feb 1995| 00000020 29 0a 20 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |). =============| 00000030 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================| 00000040 3d 3d 0a 0a 20 a9 20 47 72 61 68 61 6d 20 52 20 |==.. . Graham R | 00000050 4b 69 6e 67 20 31 39 39 34 2c 39 35 0a 0a 0a 0a |King 1994,95....| 00000060 20 4d 61 53 4b 0a 20 3d 3d 3d 3d 0a 0a 20 4d 61 | MaSK. ====.. Ma| 00000070 53 4b 20 69 73 20 62 61 73 69 63 61 6c 6c 79 2c |SK is basically,| 00000080 20 61 20 70 73 65 75 64 6f 20 73 75 62 6c 69 6d | a pseudo sublim| 00000090 69 6e 61 6c 20 64 61 74 61 20 61 6d 61 6c 67 61 |inal data amalga| 000000a0 6d 61 74 6f 72 2e 20 48 6d 6d 2e 2e 0a 0a 20 49 |mator. Hmm.... I| 000000b0 6e 20 6c 61 79 6d 61 6e 27 73 20 74 65 72 6d 73 |n layman's terms| 000000c0 20 61 6e 64 20 72 65 61 6c 69 73 74 69 63 61 6c | and realistical| 000000d0 6c 79 2c 20 20 4d 61 53 4b 20 68 69 64 65 73 20 |ly, MaSK hides | 000000e0 61 6e 79 20 66 69 6c 65 20 77 69 74 68 69 6e 20 |any file within | 000000f0 61 6e 20 20 69 6d 61 67 65 20 6f 72 0a 20 61 20 |an image or. a | 00000100 73 6f 75 6e 64 20 73 61 6d 70 6c 65 2e 20 20 49 |sound sample. I| 00000110 6d 61 67 69 6e 65 20 64 72 6f 70 70 69 6e 67 20 |magine dropping | 00000120 79 6f 75 72 20 66 61 76 6f 75 72 69 74 65 20 73 |your favourite s| 00000130 6f 75 6e 64 20 73 61 6d 70 6c 65 20 20 6f 6e 74 |ound sample ont| 00000140 6f 20 20 4d 61 53 4b 20 61 6e 64 0a 20 66 69 6e |o MaSK and. fin| 00000150 64 69 6e 67 20 6f 75 74 20 74 68 61 74 20 68 69 |ding out that hi| 00000160 64 64 65 6e 20 77 69 74 68 69 6e 20 74 68 65 20 |dden within the | 00000170 61 75 64 69 6f 20 64 61 74 61 20 20 69 73 20 20 |audio data is | 00000180 61 6e 20 20 61 72 63 68 69 76 65 20 20 63 6f 6e |an archive con| 00000190 74 61 69 6e 69 6e 67 20 20 61 0a 20 73 61 6d 70 |taining a. samp| 000001a0 6c 65 20 65 64 69 74 69 6e 67 20 61 70 70 6c 69 |le editing appli| 000001b0 63 61 74 69 6f 6e 21 20 4d 61 53 4b 20 6d 61 6b |cation! MaSK mak| 000001c0 65 73 20 74 68 69 73 20 61 20 72 65 61 6c 69 74 |es this a realit| 000001d0 79 2e 2e 2e 0a 0a 0a 0a 20 44 69 73 63 6c 61 69 |y....... Disclai| 000001e0 6d 65 72 0a 20 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a |mer. ==========.| 000001f0 0a 20 49 6e 20 6e 6f 20 63 69 72 63 75 6d 73 74 |. In no circumst| 00000200 61 6e 63 65 73 20 73 68 61 6c 6c 20 74 68 65 20 |ances shall the | 00000210 20 61 75 74 68 6f 72 20 20 62 65 20 20 6c 69 61 | author be lia| 00000220 62 6c 65 20 20 66 6f 72 20 20 61 6e 79 20 20 64 |ble for any d| 00000230 61 6d 61 67 65 2c 20 20 6c 6f 73 73 20 20 6f 66 |amage, loss of| 00000240 0a 20 70 72 6f 66 69 74 73 2c 20 20 74 69 6d 65 |. profits, time| 00000250 20 6f 72 20 64 61 74 61 20 6f 72 20 61 6e 79 20 | or data or any | 00000260 69 6e 64 69 72 65 63 74 20 6f 72 20 63 6f 6e 73 |indirect or cons| 00000270 65 71 75 65 6e 74 69 61 6c 20 6c 6f 73 73 20 72 |equential loss r| 00000280 69 73 69 6e 67 20 6f 75 74 20 6f 66 20 74 68 65 |ising out of the| 00000290 0a 20 75 73 65 20 6f 72 20 69 6e 61 62 69 6c 69 |. use or inabili| 000002a0 74 79 20 74 6f 20 75 73 65 20 74 68 69 73 20 73 |ty to use this s| 000002b0 6f 66 74 77 61 72 65 2e 0a 0a 20 20 0a 0a 20 43 |oftware... .. C| 000002c0 6f 70 79 72 69 67 68 74 20 2f 20 44 69 73 74 72 |opyright / Distr| 000002d0 69 62 75 74 69 6f 6e 0a 20 3d 3d 3d 3d 3d 3d 3d |ibution. =======| 000002e0 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================| 000002f0 3d 0a 20 20 0a 20 54 68 69 73 20 61 70 70 6c 69 |=. . This appli| 00000300 63 61 74 69 6f 6e 20 26 20 61 6c 6c 20 61 73 73 |cation & all ass| 00000310 6f 63 69 61 74 65 64 20 64 61 74 61 20 61 72 65 |ociated data are| 00000320 20 74 68 65 20 65 78 63 6c 75 73 69 76 65 20 63 | the exclusive c| 00000330 6f 70 79 72 69 67 68 74 20 6f 66 20 47 72 61 68 |opyright of Grah| 00000340 61 6d 20 52 0a 20 4b 69 6e 67 2c 20 31 39 39 34 |am R. King, 1994| 00000350 2c 20 31 39 39 35 2e 0a 20 20 0a 20 48 6f 77 65 |, 1995.. . Howe| 00000360 76 65 72 2c 20 69 74 20 6d 61 79 20 62 65 20 64 |ver, it may be d| 00000370 69 73 74 72 69 62 75 74 65 64 20 66 72 65 65 6c |istributed freel| 00000380 79 20 6f 6e 20 61 20 6e 6f 6e 2d 70 72 6f 66 69 |y on a non-profi| 00000390 74 20 6d 61 6b 69 6e 67 20 62 61 73 69 73 20 73 |t making basis s| 000003a0 6f 20 6c 6f 6e 67 20 61 73 0a 20 61 6c 6c 20 74 |o long as. all t| 000003b0 68 65 20 6f 72 69 67 69 6e 61 6c 20 66 69 6c 65 |he original file| 000003c0 73 20 61 72 65 20 69 6e 63 6c 75 64 65 64 20 75 |s are included u| 000003d0 6e 6d 6f 64 69 66 69 65 64 2e 0a 0a 0a 0a 20 49 |nmodified..... I| 000003e0 6e 74 72 6f 64 75 63 74 69 6f 6e 0a 20 3d 3d 3d |ntroduction. ===| 000003f0 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a 20 20 0a 20 46 6f |=========. . Fo| 00000400 72 20 74 68 65 20 75 6e 69 6e 69 74 69 61 74 65 |r the uninitiate| 00000410 64 2c 20 74 68 65 20 73 63 69 65 6e 63 65 20 6f |d, the science o| 00000420 66 20 63 72 79 70 74 6f 6c 6f 67 79 20 69 6e 76 |f cryptology inv| 00000430 6f 6c 76 65 73 20 73 63 72 61 6d 62 6c 69 6e 67 |olves scrambling| 00000440 20 69 6e 66 6f 72 6d 61 74 69 6f 6e 0a 20 74 6f | information. to| 00000450 20 70 72 65 76 65 6e 74 20 75 6e 61 75 74 68 6f | prevent unautho| 00000460 72 69 73 65 64 20 70 65 72 73 6f 6e 73 20 76 69 |rised persons vi| 00000470 65 77 69 6e 67 20 69 74 2e 20 49 74 27 73 20 6e |ewing it. It's n| 00000480 6f 74 68 69 6e 67 20 6e 65 77 2e 20 49 6e 20 66 |othing new. In f| 00000490 61 63 74 20 6f 6e 20 65 76 65 72 79 0a 20 63 6f |act on every. co| 000004a0 6d 70 75 74 65 72 20 70 6c 61 74 66 6f 72 6d 20 |mputer platform | 000004b0 79 6f 75 20 77 69 6c 6c 20 66 69 6e 64 20 63 72 |you will find cr| 000004c0 79 70 74 6f 67 72 61 70 68 69 63 20 73 6f 66 74 |yptographic soft| 000004d0 77 61 72 65 20 69 6e 20 6f 6e 65 20 66 6f 72 6d |ware in one form| 000004e0 20 6f 72 20 61 6e 6f 74 68 65 72 2e 0a 0a 20 57 | or another... W| 000004f0 65 61 6b 6e 65 73 73 65 73 20 6f 66 20 61 6e 79 |eaknesses of any| 00000500 20 69 6e 64 69 76 69 64 75 61 6c 20 65 6e 63 72 | individual encr| 00000510 79 70 74 69 6f 6e 20 6d 65 74 68 6f 64 20 61 73 |yption method as| 00000520 69 64 65 2c 63 6f 6e 76 65 6e 74 69 6f 6e 61 6c |ide,conventional| 00000530 20 63 72 79 70 74 6f 67 72 61 70 68 79 0a 20 68 | cryptography. h| 00000540 61 73 20 6f 6e 65 20 6d 61 6a 6f 72 20 64 69 73 |as one major dis| 00000550 61 64 76 61 6e 74 61 67 65 3b 65 76 65 6e 20 74 |advantage;even t| 00000560 68 6f 75 67 68 20 70 72 79 69 6e 67 20 65 79 65 |hough prying eye| 00000570 73 20 6d 61 79 20 6e 6f 74 20 62 65 20 61 62 6c |s may not be abl| 00000580 65 20 74 6f 20 64 65 63 69 70 68 65 72 0a 20 65 |e to decipher. e| 00000590 6e 63 72 79 70 74 65 64 20 64 61 74 61 2c 20 69 |ncrypted data, i| 000005a0 74 27 73 20 70 72 65 74 74 79 20 63 6c 65 61 72 |t's pretty clear| 000005b0 20 74 68 61 74 20 74 68 65 20 64 61 74 61 20 68 | that the data h| 000005c0 61 73 20 62 65 65 6e 20 61 6c 74 65 72 65 64 20 |as been altered | 000005d0 62 79 20 73 6f 6d 65 74 68 69 6e 67 2e 0a 0a 20 |by something... | 000005e0 48 6f 77 65 76 65 72 2c 20 4d 61 53 4b 20 69 73 |However, MaSK is| 000005f0 20 64 69 66 66 65 72 65 6e 74 2e 2e 2e 0a 0a 20 | different..... | 00000600 52 61 74 68 65 72 20 74 68 61 6e 20 75 73 69 6e |Rather than usin| 00000610 67 20 63 6f 6e 76 65 6e 74 69 6f 6e 61 6c 20 63 |g conventional c| 00000620 72 79 70 74 6f 6c 6f 67 79 20 74 6f 20 70 72 6f |ryptology to pro| 00000630 64 75 63 65 20 65 6e 63 72 79 70 74 65 64 20 64 |duce encrypted d| 00000640 61 74 61 2c 20 6f 72 20 63 69 70 68 65 72 0a 20 |ata, or cipher. | 00000650 74 65 78 74 2c 20 4d 61 53 4b 20 61 64 6f 70 74 |text, MaSK adopt| 00000660 73 20 61 6e 20 65 6e 74 69 72 65 6c 79 20 64 69 |s an entirely di| 00000670 66 66 65 72 65 6e 74 20 61 70 70 72 6f 61 63 68 |fferent approach| 00000680 2e 20 20 43 65 72 74 61 69 6e 20 66 69 6c 65 20 |. Certain file | 00000690 74 79 70 65 73 2c 20 6e 6f 74 61 62 6c 79 0a 20 |types, notably. | 000006a0 67 72 61 70 68 69 63 73 20 61 6e 64 20 73 6f 75 |graphics and sou| 000006b0 6e 64 20 66 69 6c 65 73 2c 20 20 68 61 76 65 20 |nd files, have | 000006c0 61 20 63 65 72 74 61 69 6e 20 61 6d 6f 75 6e 74 |a certain amount| 000006d0 20 6f 66 20 73 65 6d 69 2d 72 65 64 75 6e 64 61 | of semi-redunda| 000006e0 6e 74 20 20 64 61 74 61 20 20 69 6e 74 6f 0a 20 |nt data into. | 000006f0 77 68 69 63 68 20 63 61 6e 20 62 65 20 67 72 61 |which can be gra| 00000700 66 74 65 64 20 63 6f 6e 63 65 61 6c 65 64 20 64 |fted concealed d| 00000710 61 74 61 20 77 68 69 63 68 20 20 63 61 6e 6e 6f |ata which canno| 00000720 74 20 20 62 65 20 20 64 65 74 65 63 74 65 64 20 |t be detected | 00000730 20 62 79 20 20 61 20 20 6e 6f 72 6d 61 6c 0a 20 | by a normal. | 00000740 70 65 72 75 73 61 6c 20 6f 66 20 74 68 65 20 22 |perusal of the "| 00000750 68 6f 73 74 22 20 66 69 6c 65 2e 0a 0a 0a 0a 20 |host" file..... | 00000760 55 73 69 6e 67 20 4d 61 53 4b 0a 20 3d 3d 3d 3d |Using MaSK. ====| 00000770 3d 3d 3d 3d 3d 3d 0a 0a 20 54 68 65 20 62 65 73 |======.. The bes| 00000780 74 20 77 61 79 20 74 6f 20 75 6e 64 65 72 73 74 |t way to underst| 00000790 61 6e 64 20 77 68 61 74 20 6d 61 73 6b 20 64 6f |and what mask do| 000007a0 65 73 20 69 73 20 74 6f 20 20 74 72 79 20 20 69 |es is to try i| 000007b0 74 2e 20 20 54 61 6b 65 20 61 20 20 7e 33 30 4b |t. Take a ~30K| 000007c0 20 20 73 6f 75 6e 64 0a 20 73 61 6d 70 6c 65 20 | sound. sample | 000007d0 61 6e 64 20 61 20 73 6d 61 6c 6c 20 74 65 78 74 |and a small text| 000007e0 20 66 69 6c 65 2e 20 46 6f 6c 6c 6f 77 20 74 68 | file. Follow th| 000007f0 65 20 70 72 6f 63 65 64 75 72 65 20 6f 75 74 6c |e procedure outl| 00000800 69 6e 65 64 20 62 65 6c 6f 77 20 61 6e 64 20 73 |ined below and s| 00000810 61 76 65 20 74 68 65 0a 20 72 65 73 75 6c 74 61 |ave the. resulta| 00000820 6e 74 20 73 61 6d 70 6c 65 2e 20 50 6c 61 79 20 |nt sample. Play | 00000830 62 6f 74 68 20 73 61 6d 70 6c 65 73 20 69 6e 20 |both samples in | 00000840 61 20 73 61 6d 70 6c 65 20 65 64 69 74 6f 72 20 |a sample editor | 00000850 2d 20 6e 6f 20 64 69 66 66 65 72 65 6e 63 65 2e |- no difference.| 00000860 20 20 43 6c 65 61 72 0a 20 61 6c 6c 20 64 61 74 | Clear. all dat| 00000870 61 20 69 6e 20 4d 61 53 4b 20 62 79 20 63 6c 69 |a in MaSK by cli| 00000880 63 6b 69 6e 67 20 6f 6e 20 22 43 6c 65 61 72 22 |cking on "Clear"| 00000890 20 61 6e 64 20 64 72 6f 70 20 74 68 65 20 6e 65 | and drop the ne| 000008a0 77 6c 79 20 63 72 65 61 74 65 64 20 73 61 6d 70 |wly created samp| 000008b0 6c 65 20 69 6e 74 6f 0a 20 4d 61 53 4b 20 61 73 |le into. MaSK as| 000008c0 20 79 6f 75 20 64 69 64 20 77 69 74 68 20 74 68 | you did with th| 000008d0 65 20 6f 72 69 67 69 6e 61 6c 2e 20 20 41 20 73 |e original. A s| 000008e0 61 76 65 20 62 6f 78 20 77 69 6c 6c 20 61 70 70 |ave box will app| 000008f0 65 61 72 20 61 6e 64 20 20 74 68 65 20 20 72 65 |ear and the re| 00000900 73 75 6c 74 61 6e 74 0a 20 74 65 78 74 20 66 69 |sultant. text fi| 00000910 6c 65 20 77 69 6c 6c 20 62 65 20 74 68 65 20 6f |le will be the o| 00000920 6e 65 20 79 6f 75 20 6f 72 69 67 69 6e 61 6c 6c |ne you originall| 00000930 79 20 68 61 64 2e 20 20 49 74 27 73 20 71 75 69 |y had. It's qui| 00000940 74 65 20 61 6d 61 7a 69 6e 67 20 20 74 6f 20 20 |te amazing to | 00000950 73 65 65 20 20 69 74 0a 20 77 6f 72 6b 20 66 6f |see it. work fo| 00000960 72 20 74 68 65 20 66 69 72 73 74 20 74 69 6d 65 |r the first time| 00000970 21 20 2e 2e 77 65 6c 6c 20 69 74 20 61 6d 61 7a |! ..well it amaz| 00000980 65 64 20 6d 65 20 61 6e 64 20 49 20 77 72 6f 74 |ed me and I wrot| 00000990 65 20 69 74 2e 2e 0a 0a 0a 20 45 6e 63 72 79 70 |e it..... Encryp| 000009a0 74 69 6e 67 2e 0a 0a 20 54 6f 20 65 6e 63 72 79 |ting... To encry| 000009b0 70 74 20 61 20 62 69 6e 61 72 79 20 66 69 6c 65 |pt a binary file| 000009c0 20 61 20 68 6f 73 74 20 66 69 6c 65 20 6e 65 65 | a host file nee| 000009d0 64 65 64 2e 20 44 72 61 67 20 74 68 65 20 68 6f |ded. Drag the ho| 000009e0 73 74 20 66 69 6c 65 20 66 72 6f 6d 20 74 68 65 |st file from the| 000009f0 20 66 69 6c 65 72 0a 20 77 69 6e 64 6f 77 20 74 | filer. window t| 00000a00 6f 20 74 68 65 20 22 48 6f 73 74 20 49 6e 70 75 |o the "Host Inpu| 00000a10 74 22 20 69 63 6f 6e 20 6f 66 20 4d 61 53 4b 27 |t" icon of MaSK'| 00000a20 73 20 6d 61 69 6e 20 77 69 6e 64 6f 77 2e 0a 0a |s main window...| 00000a30 20 44 6f 20 74 68 65 20 73 61 6d 65 20 77 69 74 | Do the same wit| 00000a40 68 20 74 68 65 20 62 69 6e 61 72 79 20 66 69 6c |h the binary fil| 00000a50 65 20 61 6e 64 20 74 68 65 6e 20 63 6c 69 63 6b |e and then click| 00000a60 20 53 45 4c 45 43 54 20 6f 6e 20 22 45 6e 63 72 | SELECT on "Encr| 00000a70 79 70 74 22 2e 41 20 73 61 76 65 20 62 6f 78 0a |ypt".A save box.| 00000a80 20 77 69 6c 6c 20 62 65 20 6f 70 65 6e 65 64 20 | will be opened | 00000a90 61 6e 64 20 74 68 65 20 72 65 73 75 6c 74 61 6e |and the resultan| 00000aa0 74 20 66 69 6c 65 20 77 69 6c 6c 20 63 6f 6e 74 |t file will cont| 00000ab0 61 69 6e 20 74 68 65 20 6d 61 73 6b 65 64 20 64 |ain the masked d| 00000ac0 61 74 61 2e 0a 0a 20 54 68 65 20 66 69 6c 65 74 |ata... The filet| 00000ad0 79 70 65 20 61 6e 64 20 73 69 7a 65 20 6f 66 20 |ype and size of | 00000ae0 74 68 65 20 62 69 6e 61 72 79 20 66 69 6c 65 20 |the binary file | 00000af0 61 72 65 20 61 6c 73 6f 20 65 6e 63 72 79 70 74 |are also encrypt| 00000b00 65 64 20 77 69 74 68 20 69 6e 20 74 68 65 20 20 |ed with in the | 00000b10 68 6f 73 74 2e 0a 0a 0a 20 44 65 63 72 79 70 74 |host.... Decrypt| 00000b20 69 6e 67 2e 0a 0a 20 49 66 20 61 20 68 6f 73 74 |ing... If a host| 00000b30 20 66 69 6c 65 20 63 6f 6e 74 61 69 6e 73 20 6d | file contains m| 00000b40 61 73 6b 65 64 20 64 61 74 61 20 61 20 73 61 76 |asked data a sav| 00000b50 65 20 62 6f 78 20 77 69 6c 6c 20 20 62 65 20 20 |e box will be | 00000b60 64 69 73 70 6c 61 79 65 64 20 20 77 68 65 6e 20 |displayed when | 00000b70 20 69 74 27 73 0a 20 64 72 61 67 67 65 64 20 74 | it's. dragged t| 00000b80 6f 20 74 68 65 20 22 48 6f 73 74 20 49 6e 70 75 |o the "Host Inpu| 00000b90 74 22 20 69 63 6f 6e 20 61 73 20 77 69 74 68 20 |t" icon as with | 00000ba0 65 6e 63 72 79 70 74 69 6e 67 2e 0a 0a 0a 0a 20 |encrypting..... | 00000bb0 49 6d 70 6f 72 74 61 6e 74 20 4e 6f 74 65 73 20 |Important Notes | 00000bc0 43 6f 6e 63 65 72 6e 69 6e 67 20 53 61 6d 70 6c |Concerning Sampl| 00000bd0 65 73 0a 20 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |es. ============| 00000be0 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================| 00000bf0 3d 3d 3d 3d 3d 3d 0a 0a 20 53 61 6d 70 6c 65 73 |======.. Samples| 00000c00 20 63 61 6e 20 62 65 20 73 74 6f 72 65 64 20 69 | can be stored i| 00000c10 6e 20 73 65 76 65 72 61 6c 20 64 69 66 66 65 72 |n several differ| 00000c20 65 6e 74 20 66 6f 72 6d 61 74 73 2c 20 62 61 73 |ent formats, bas| 00000c30 69 63 61 6c 6c 79 20 74 68 65 72 65 20 61 72 65 |ically there are| 00000c40 20 6c 69 6e 65 61 72 0a 20 73 61 6d 70 6c 65 73 | linear. samples| 00000c50 20 61 6e 64 20 6c 6f 67 61 72 69 74 68 6d 69 63 | and logarithmic| 00000c60 20 73 61 6d 70 6c 65 73 2e 20 20 41 73 20 61 20 | samples. As a | 00000c70 72 75 6c 65 2c 20 4d 61 53 4b 20 68 61 73 20 6e |rule, MaSK has n| 00000c80 6f 20 69 64 65 61 20 6f 66 20 74 68 65 20 66 6f |o idea of the fo| 00000c90 72 6d 61 74 20 6f 66 0a 20 61 6e 79 20 70 61 72 |rmat of. any par| 00000ca0 74 69 63 75 6c 61 72 20 73 61 6d 70 6c 65 2e 0a |ticular sample..| 00000cb0 0a 20 57 68 65 6e 20 20 61 20 20 73 61 6d 70 6c |. When a sampl| 00000cc0 65 20 69 73 20 6c 6f 61 64 65 64 20 69 6e 74 6f |e is loaded into| 00000cd0 20 4d 61 53 4b 20 61 73 20 61 20 20 68 6f 73 74 | MaSK as a host| 00000ce0 20 20 66 69 6c 65 2c 20 4d 61 53 4b 20 20 61 73 | file, MaSK as| 00000cf0 73 75 6d 65 73 20 77 68 69 63 68 20 64 61 74 61 |sumes which data| 00000d00 0a 20 66 6f 72 6d 61 74 20 73 68 6f 75 6c 64 20 |. format should | 00000d10 62 65 20 75 73 65 64 20 62 61 73 65 64 20 6f 6e |be used based on| 00000d20 20 74 68 65 20 66 69 6c 65 74 79 70 65 3a 0a 0a | the filetype:..| 00000d30 20 41 72 6d 61 64 65 75 73 20 28 26 44 33 43 29 | Armadeus (&D3C)| 00000d40 20 61 72 65 20 61 73 73 75 6d 65 64 20 74 6f 20 | are assumed to | 00000d50 62 65 20 4c 69 6e 65 61 72 20 73 61 6d 70 6c 65 |be Linear sample| 00000d60 73 2e 0a 20 54 46 46 20 28 54 72 61 63 6b 65 72 |s.. TFF (Tracker| 00000d70 20 46 69 6c 65 20 46 6f 72 6d 61 74 29 20 28 26 | File Format) (&| 00000d80 43 42 35 29 20 61 72 65 20 61 73 73 75 6d 65 64 |CB5) are assumed| 00000d90 20 74 6f 20 62 65 20 4c 6f 67 61 72 69 74 68 6d | to be Logarithm| 00000da0 69 63 2e 0a 0a 20 54 68 69 73 20 6d 61 79 20 6e |ic... This may n| 00000db0 6f 74 20 61 6c 77 61 79 73 20 62 65 20 74 68 65 |ot always be the| 00000dc0 20 63 61 73 65 20 68 6f 77 65 76 65 72 2c 20 73 | case however, s| 00000dd0 6f 20 4d 61 53 4b 20 70 72 6f 76 69 64 65 73 20 |o MaSK provides | 00000de0 79 6f 75 20 77 69 74 68 20 61 20 6d 65 63 68 61 |you with a mecha| 00000df0 6e 69 73 6d 0a 20 6f 66 20 73 70 65 63 69 66 79 |nism. of specify| 00000e00 69 6e 67 20 74 68 65 20 73 61 6d 70 6c 65 20 64 |ing the sample d| 00000e10 61 74 61 20 66 6f 72 6d 61 74 2e 20 54 68 65 72 |ata format. Ther| 00000e20 65 20 69 73 20 61 6e 20 69 63 6f 6e 20 69 6e 20 |e is an icon in | 00000e30 74 68 65 20 68 6f 73 74 20 69 6e 66 6f 72 6d 61 |the host informa| 00000e40 74 69 6f 6e 0a 20 62 6f 78 20 74 68 61 74 2c 20 |tion. box that, | 00000e50 66 6f 72 20 73 70 72 69 74 65 73 2c 20 72 65 61 |for sprites, rea| 00000e60 64 73 20 22 4d 6f 64 65 3a 22 2e 20 20 57 68 65 |ds "Mode:". Whe| 00000e70 6e 20 61 20 73 61 6d 70 6c 65 20 69 73 20 6c 6f |n a sample is lo| 00000e80 61 64 65 64 20 74 68 69 73 20 63 68 61 6e 67 65 |aded this change| 00000e90 73 20 74 6f 0a 20 22 46 6f 72 6d 61 74 3a 22 2e |s to. "Format:".| 00000ea0 20 20 43 6c 69 63 6b 69 6e 67 20 61 6e 79 20 62 | Clicking any b| 00000eb0 75 74 74 6f 6e 20 6f 76 65 72 20 74 68 65 20 61 |utton over the a| 00000ec0 64 6a 61 63 65 6e 74 20 69 63 6f 6e 20 77 69 6c |djacent icon wil| 00000ed0 6c 20 64 69 73 70 6c 61 79 20 61 20 6c 69 73 74 |l display a list| 00000ee0 20 20 6f 66 0a 20 73 61 6d 70 6c 65 20 64 61 74 | of. sample dat| 00000ef0 61 20 66 6f 72 6d 61 74 73 20 61 6e 64 20 74 68 |a formats and th| 00000f00 65 20 61 70 70 6c 69 63 61 62 6c 65 20 6f 6e 65 |e applicable one| 00000f10 20 6d 61 79 20 62 65 20 73 65 6c 65 63 74 65 64 | may be selected| 00000f20 2e 0a 0a 20 49 66 20 79 6f 75 20 61 72 65 20 6e |... If you are n| 00000f30 6f 74 20 73 75 72 65 20 6f 66 20 74 68 65 20 73 |ot sure of the s| 00000f40 61 6d 70 6c 65 20 66 6f 72 6d 61 74 2c 20 6c 6f |ample format, lo| 00000f50 61 64 20 74 68 65 20 73 61 6d 70 6c 65 20 69 6e |ad the sample in| 00000f60 74 6f 20 61 20 73 61 6d 70 6c 65 20 70 6c 61 79 |to a sample play| 00000f70 65 72 0a 20 61 66 74 65 72 20 69 74 20 68 61 73 |er. after it has| 00000f80 20 62 65 65 6e 20 6d 61 73 6b 65 64 2e 20 20 49 | been masked. I| 00000f90 66 20 61 20 6c 6f 74 20 6f 66 20 20 64 69 73 74 |f a lot of dist| 00000fa0 6f 72 74 69 6f 6e 20 6f 63 63 75 72 73 20 20 61 |ortion occurs a| 00000fb0 74 20 74 68 65 20 73 74 61 72 74 20 6f 66 20 74 |t the start of t| 00000fc0 68 65 0a 20 73 61 6d 70 6c 65 20 74 68 65 6e 20 |he. sample then | 00000fd0 79 6f 75 20 68 61 76 65 20 73 65 6c 65 63 74 65 |you have selecte| 00000fe0 64 20 74 68 65 20 77 72 6f 6e 67 20 73 61 6d 70 |d the wrong samp| 00000ff0 6c 65 20 64 61 74 61 20 66 6f 72 6d 61 74 2e 20 |le data format. | 00001000 43 68 6f 6f 73 65 20 61 6e 6f 74 68 65 72 20 61 |Choose another a| 00001010 6e 64 0a 20 6d 61 73 6b 20 74 68 65 20 73 61 6d |nd. mask the sam| 00001020 70 6c 65 20 61 67 61 69 6e 2e 0a 0a 20 57 68 65 |ple again... Whe| 00001030 6e 20 61 20 73 61 6d 70 6c 65 20 63 6f 6e 74 61 |n a sample conta| 00001040 69 6e 69 6e 67 20 6d 61 73 6b 65 64 20 64 61 74 |ining masked dat| 00001050 61 20 69 73 20 6c 6f 61 64 65 64 2c 20 4d 61 53 |a is loaded, MaS| 00001060 4b 20 61 75 74 6f 6d 61 74 69 63 61 6c 6c 79 20 |K automatically | 00001070 64 65 74 65 63 74 73 20 74 68 65 0a 20 73 61 6d |detects the. sam| 00001080 70 6c 65 20 64 61 74 61 20 66 6f 72 6d 61 74 2e |ple data format.| 00001090 0a 0a 0a 0a 20 54 68 69 6e 67 73 20 54 6f 20 4e |.... Things To N| 000010a0 6f 74 65 0a 20 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |ote. ===========| 000010b0 3d 3d 3d 0a 0a 20 53 61 6d 70 6c 65 73 20 63 6f |===.. Samples co| 000010c0 70 65 20 77 69 74 68 20 74 68 69 73 20 6d 61 73 |pe with this mas| 000010d0 6b 69 6e 67 20 70 72 6f 63 65 73 73 20 6d 75 63 |king process muc| 000010e0 68 20 62 65 74 74 65 72 20 74 68 61 6e 20 53 70 |h better than Sp| 000010f0 72 69 74 65 73 20 61 6e 64 20 61 6c 73 6f 20 20 |rites and also | 00001100 67 69 76 65 0a 20 61 20 68 69 67 68 65 72 20 68 |give. a higher h| 00001110 6f 73 74 2f 64 61 74 61 20 72 61 74 69 6f 2e 0a |ost/data ratio..| 00001120 0a 20 44 75 65 20 74 6f 20 74 68 65 20 22 6e 6f |. Due to the "no| 00001130 69 73 65 22 20 63 61 75 73 65 64 20 69 6e 20 68 |ise" caused in h| 00001140 6f 73 74 20 66 69 6c 65 73 2c 20 20 69 74 20 69 |ost files, it i| 00001150 73 20 75 6e 77 69 73 65 20 20 74 6f 20 20 75 73 |s unwise to us| 00001160 65 20 20 73 70 72 69 74 65 73 20 20 74 68 61 74 |e sprites that| 00001170 0a 20 63 6f 6e 74 61 69 6e 20 6c 61 72 67 65 20 |. contain large | 00001180 61 72 65 61 73 20 6f 6e 65 20 63 6f 6c 6f 75 72 |areas one colour| 00001190 20 61 73 20 68 6f 73 74 73 2e 20 20 4d 75 63 68 | as hosts. Much| 000011a0 20 6c 65 73 73 20 20 6e 6f 74 69 63 65 61 62 6c | less noticeabl| 000011b0 65 20 20 65 66 66 65 63 74 73 20 20 77 69 6c 6c |e effects will| 000011c0 0a 20 72 65 73 75 6c 74 20 69 6e 20 64 69 67 69 |. result in digi| 000011d0 74 69 73 65 64 20 69 6d 61 67 65 73 20 74 68 61 |tised images tha| 000011e0 74 20 20 68 61 76 65 20 20 62 65 65 6e 20 20 65 |t have been e| 000011f0 72 72 6f 72 20 20 63 6f 72 72 65 63 74 65 64 2e |rror corrected.| 00001200 20 20 4e 6f 20 20 6e 6f 74 69 63 65 61 62 6c 65 | No noticeable| 00001210 0a 20 72 65 64 75 63 74 69 6f 6e 20 69 6e 20 69 |. reduction in i| 00001220 6d 61 67 65 20 71 75 61 6c 69 74 79 20 77 69 6c |mage quality wil| 00001230 6c 20 6f 63 63 75 72 20 77 69 74 68 20 62 6c 61 |l occur with bla| 00001240 63 6b 20 61 6e 64 20 20 77 68 69 74 65 20 20 64 |ck and white d| 00001250 69 67 69 74 69 73 65 64 20 20 69 6d 61 67 65 73 |igitised images| 00001260 0a 20 74 68 61 74 20 68 61 76 65 20 62 65 65 6e |. that have been| 00001270 20 46 6c 6f 79 64 2d 53 74 65 69 6e 62 65 72 67 | Floyd-Steinberg| 00001280 20 65 72 72 6f 72 20 63 6f 72 72 65 63 74 65 64 | error corrected| 00001290 20 66 6f 72 20 65 78 61 6d 70 6c 65 2c 20 61 6c | for example, al| 000012a0 74 68 6f 75 67 68 20 65 76 65 6e 20 74 68 69 73 |though even this| 000012b0 0a 20 77 6f 75 6c 64 20 64 65 70 65 6e 64 20 6f |. would depend o| 000012c0 6e 20 74 68 65 20 69 6d 61 67 65 2e 0a 0a 0a 0a |n the image.....| 000012d0 20 45 4e 47 69 4e 45 0a 20 3d 3d 3d 3d 3d 3d 0a | ENGiNE. ======.| 000012e0 0a 20 54 68 69 73 20 69 73 20 74 68 65 20 6d 6f |. This is the mo| 000012f0 64 75 6c 65 20 74 68 61 74 20 74 68 65 20 61 70 |dule that the ap| 00001300 70 6c 69 63 61 74 69 6f 6e 20 75 73 65 73 20 74 |plication uses t| 00001310 6f 20 6d 61 73 6b 20 64 61 74 61 2e 20 20 49 74 |o mask data. It| 00001320 27 73 20 63 6f 64 65 64 20 20 74 6f 20 20 62 65 |'s coded to be| 00001330 0a 20 76 65 72 79 20 71 75 69 63 6b 2e 20 20 54 |. very quick. T| 00001340 68 65 20 61 63 74 75 61 6c 20 65 6e 63 72 79 70 |he actual encryp| 00001350 74 69 6f 6e 20 69 73 20 64 6f 6e 65 20 77 68 65 |tion is done whe| 00001360 6e 20 74 68 65 20 75 73 65 72 20 63 6c 69 63 6b |n the user click| 00001370 73 20 20 6f 6e 20 20 22 45 6e 63 72 79 70 74 22 |s on "Encrypt"| 00001380 0a 20 61 6e 64 20 69 73 20 66 69 6e 69 73 68 65 |. and is finishe| 00001390 64 20 62 65 66 6f 72 65 20 74 68 65 20 73 61 76 |d before the sav| 000013a0 65 20 62 6f 78 20 6f 70 65 6e 73 2e 0a 0a 20 41 |e box opens... A| 000013b0 20 74 79 70 69 63 61 6c 20 65 78 61 6d 70 6c 65 | typical example| 000013c0 3a 20 28 41 52 4d 20 32 2c 20 6d 6f 64 65 20 30 |: (ARM 2, mode 0| 000013d0 29 0a 0a 20 20 20 41 20 66 75 6c 6c 20 6d 6f 64 |).. A full mod| 000013e0 65 20 33 36 20 73 63 72 65 65 6e 20 64 75 6d 70 |e 36 screen dump| 000013f0 20 28 7e 32 32 30 4b 29 20 74 61 6b 65 73 20 7e | (~220K) takes ~| 00001400 32 33 20 63 65 6e 74 69 2d 73 65 63 6f 6e 64 20 |23 centi-second | 00001410 74 6f 20 6d 61 73 6b 2e 0a 20 20 20 54 68 61 74 |to mask.. That| 00001420 27 73 20 7e 31 4d 62 20 61 20 73 65 63 6f 6e 64 |'s ~1Mb a second| 00001430 20 65 6e 63 72 79 70 74 69 6f 6e 2e 0a 0a 0a 0a | encryption.....| 00001440 20 4f 76 65 72 76 69 65 77 0a 20 3d 3d 3d 3d 3d | Overview. =====| 00001450 3d 3d 3d 0a 0a 20 4d 61 53 4b 20 63 61 6e 20 63 |===.. MaSK can c| 00001460 75 72 72 65 6e 74 6c 79 20 68 61 6e 64 6c 65 20 |urrently handle | 00001470 73 65 76 65 72 61 6c 20 64 69 66 66 65 72 65 6e |several differen| 00001480 74 20 68 6f 73 74 20 66 69 6c 65 74 79 70 65 73 |t host filetypes| 00001490 20 3a 0a 0a 20 8f 20 32 35 36 20 43 6f 6c 6f 75 | :.. . 256 Colou| 000014a0 72 20 53 70 72 69 74 65 73 20 28 26 46 46 39 29 |r Sprites (&FF9)| 000014b0 0a 20 8f 20 41 72 6d 61 64 65 75 73 20 53 6f 75 |. . Armadeus Sou| 000014c0 6e 64 20 53 61 6d 70 6c 65 73 20 28 26 44 33 43 |nd Samples (&D3C| 000014d0 29 0a 20 8f 20 54 46 46 20 53 6f 75 6e 64 20 53 |). . TFF Sound S| 000014e0 61 6d 70 6c 65 73 20 28 26 43 42 35 29 0a 0a 20 |amples (&CB5).. | 000014f0 41 6e 79 20 62 69 6e 61 72 79 20 66 69 6c 65 20 |Any binary file | 00001500 63 61 6e 20 62 65 20 22 6d 61 73 6b 65 64 22 20 |can be "masked" | 00001510 77 69 74 68 69 6e 20 61 20 68 6f 73 74 20 66 69 |within a host fi| 00001520 6c 65 2e 54 68 65 20 6f 6e 6c 79 20 63 6f 6e 73 |le.The only cons| 00001530 74 72 61 69 6e 74 20 69 73 20 66 69 6c 65 0a 20 |traint is file. | 00001540 73 69 7a 65 2e 20 44 69 66 66 65 72 65 6e 74 20 |size. Different | 00001550 68 6f 73 74 20 74 79 70 65 73 20 68 61 76 65 20 |host types have | 00001560 64 69 66 66 65 72 65 6e 74 20 22 6d 61 73 6b 65 |different "maske| 00001570 64 22 20 64 61 74 61 20 63 61 70 61 63 69 74 69 |d" data capaciti| 00001580 65 73 2e 20 20 54 68 65 20 74 6f 74 61 6c 0a 20 |es. The total. | 00001590 63 61 70 61 63 69 74 79 20 66 6f 72 20 61 6e 79 |capacity for any| 000015a0 20 6f 6e 65 20 70 61 72 74 69 63 75 6c 61 72 20 | one particular | 000015b0 68 6f 73 74 20 66 69 6c 65 20 69 73 20 61 6c 73 |host file is als| 000015c0 6f 20 20 64 65 70 65 6e 64 61 6e 74 20 20 6f 6e |o dependant on| 000015d0 20 20 69 74 73 20 20 6c 65 6e 67 74 68 2e 0a 0a | its length...| 000015e0 20 43 61 70 61 63 69 74 69 65 73 20 66 6f 72 20 | Capacities for | 000015f0 63 75 72 72 65 6e 74 6c 79 20 72 65 63 6f 67 6e |currently recogn| 00001600 69 7a 65 64 20 68 6f 73 74 20 74 79 70 65 73 20 |ized host types | 00001610 61 72 65 20 3a 0a 0a 20 48 6f 73 74 20 54 79 70 |are :.. Host Typ| 00001620 65 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |e | 00001630 20 20 20 20 20 20 20 20 4d 61 78 20 43 61 70 61 | Max Capa| 00001640 63 69 74 79 0a 20 2d 2d 2d 2d 2d 2d 2d 2d 2d 20 |city. --------- | 00001650 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00001660 20 20 20 20 20 20 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d | ----------| 00001670 2d 2d 0a 20 32 35 36 20 43 6f 6c 6f 75 72 20 53 |--. 256 Colour S| 00001680 70 72 69 74 65 73 20 28 26 46 46 39 29 20 20 20 |prites (&FF9) | 00001690 20 20 20 20 20 20 20 31 32 2e 35 25 0a 20 41 72 | 12.5%. Ar| 000016a0 6d 61 64 65 75 73 20 53 61 6d 70 6c 65 73 20 28 |madeus Samples (| 000016b0 26 44 33 43 29 20 20 20 20 20 20 20 20 20 20 20 |&D3C) | 000016c0 20 32 35 2e 30 25 0a 20 54 46 46 20 53 6f 75 6e | 25.0%. TFF Soun| 000016d0 64 20 53 61 6d 70 6c 65 73 20 28 26 43 42 35 29 |d Samples (&CB5)| 000016e0 20 20 20 20 20 20 20 20 20 20 20 32 35 2e 30 25 | 25.0%| 000016f0 0a 0a 20 46 6f 72 20 65 78 61 6d 70 6c 65 2c 20 |.. For example, | 00001700 20 61 20 32 30 30 4b 20 73 61 6d 70 6c 65 20 63 | a 200K sample c| 00001710 6f 75 6c 64 20 68 6f 6c 64 20 61 20 35 30 4b 20 |ould hold a 50K | 00001720 62 69 6e 61 72 79 20 20 66 69 6c 65 2e 20 20 54 |binary file. T| 00001730 68 69 73 20 20 62 69 6e 61 72 79 20 20 66 69 6c |his binary fil| 00001740 65 0a 20 68 6f 77 65 76 65 72 2c 20 20 63 6f 75 |e. however, cou| 00001750 6c 64 20 62 65 20 61 6e 20 61 72 63 68 69 76 65 |ld be an archive| 00001760 2c 20 20 74 68 75 73 20 67 69 76 69 6e 67 20 61 |, thus giving a| 00001770 20 6e 65 77 2c 20 20 68 69 67 68 65 72 2c 20 20 | new, higher, | 00001780 70 73 65 75 64 6f 20 20 63 61 70 61 63 69 74 79 |pseudo capacity| 00001790 2e 0a 0a 20 41 6e 6f 74 68 65 72 20 65 78 61 6d |... Another exam| 000017a0 70 6c 65 2c 20 66 75 6c 6c 20 38 30 30 4b 20 73 |ple, full 800K s| 000017b0 61 6d 70 6c 65 73 20 61 72 65 20 71 75 69 74 65 |amples are quite| 000017c0 20 63 6f 6d 6d 6f 6e 2c 20 20 6e 65 61 74 6c 79 | common, neatly| 000017d0 20 66 69 6c 6c 69 6e 67 20 6f 6e 65 20 64 69 73 | filling one dis| 000017e0 63 2e 0a 20 53 75 63 68 20 61 20 73 61 6d 70 6c |c.. Such a sampl| 000017f0 65 20 63 6f 75 6c 64 20 68 6f 6c 64 20 7e 32 30 |e could hold ~20| 00001800 30 4b 20 6f 66 20 64 61 74 61 2c 20 69 66 20 61 |0K of data, if a| 00001810 6e 20 61 72 63 68 69 76 65 20 77 61 73 20 75 73 |n archive was us| 00001820 65 64 2c 20 3e 20 34 30 30 4b 20 6f 66 20 64 61 |ed, > 400K of da| 00001830 74 61 0a 20 63 6f 75 6c 64 20 62 65 20 68 69 64 |ta. could be hid| 00001840 64 65 6e 21 0a 0a 0a 0a 20 48 65 6c 70 0a 20 3d |den!.... Help. =| 00001850 3d 3d 3d 0a 0a 20 4d 6f 72 65 20 64 65 74 61 69 |===.. More detai| 00001860 6c 65 64 20 68 65 6c 70 20 6f 6e 20 74 68 65 20 |led help on the | 00001870 61 63 74 75 61 6c 20 61 70 70 6c 69 63 61 74 69 |actual applicati| 00001880 6f 6e 20 20 66 75 6e 63 74 69 6f 6e 61 6c 69 74 |on functionalit| 00001890 79 20 20 63 61 6e 20 20 62 65 20 20 6f 62 74 61 |y can be obta| 000018a0 69 6e 65 64 0a 20 74 68 72 6f 75 67 68 20 74 68 |ined. through th| 000018b0 65 20 72 65 73 69 64 65 6e 74 20 69 6e 74 65 72 |e resident inter| 000018c0 61 63 74 69 76 65 20 68 65 6c 70 20 61 70 70 6c |active help appl| 000018d0 69 63 61 74 69 6f 6e 2e 0a 0a 0a 0a 20 43 72 65 |ication..... Cre| 000018e0 64 69 74 73 0a 20 3d 3d 3d 3d 3d 3d 3d 0a 0a 20 |dits. =======.. | 000018f0 50 72 6f 67 72 61 6d 6d 69 6e 67 20 20 20 20 20 |Programming | 00001900 20 20 3a 20 47 72 61 68 61 6d 20 52 20 4b 69 6e | : Graham R Kin| 00001910 67 0a 0a 20 4f 72 69 67 69 6e 61 6c 20 43 6f 6e |g.. Original Con| 00001920 63 65 70 74 20 20 3a 20 41 6e 64 79 20 47 65 6f |cept : Andy Geo| 00001930 72 67 65 0a 0a 20 51 75 61 6c 69 74 79 20 41 73 |rge.. Quality As| 00001940 73 75 72 61 6e 63 65 20 3a 20 50 61 75 6c 20 54 |surance : Paul T| 00001950 68 6f 72 6e 74 6f 6e 0a 20 20 20 20 20 20 20 20 |hornton. | 00001960 20 20 20 20 20 20 20 20 20 20 20 20 20 47 72 61 | Gra| 00001970 6e 74 20 4a 65 6e 6e 69 6e 67 73 0a 20 20 20 20 |nt Jennings. | 00001980 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00001990 20 44 61 72 72 65 6e 20 57 6f 74 74 65 6e 0a 0a | Darren Wotten..| 000019a0 0a 0a 20 54 68 65 20 41 75 74 68 6f 72 0a 20 3d |.. The Author. =| 000019b0 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a 0a 20 49 66 20 79 |=========.. If y| 000019c0 6f 75 20 68 61 76 65 20 61 6e 79 20 71 75 65 73 |ou have any ques| 000019d0 74 69 6f 6e 73 2c 20 20 62 75 67 20 72 65 70 6f |tions, bug repo| 000019e0 72 74 73 20 6f 72 20 73 75 67 67 65 73 74 69 6f |rts or suggestio| 000019f0 6e 73 20 66 6f 72 20 69 6d 70 72 6f 76 65 6d 65 |ns for improveme| 00001a00 6e 74 73 20 70 6c 65 61 73 65 0a 20 64 6f 20 6e |nts please. do n| 00001a10 6f 74 20 68 65 73 69 74 61 74 65 20 74 6f 20 63 |ot hesitate to c| 00001a20 6f 6e 74 61 63 74 20 74 68 65 20 61 75 74 68 6f |ontact the autho| 00001a30 72 20 61 74 20 74 68 65 20 61 64 64 72 65 73 73 |r at the address| 00001a40 20 62 65 6c 6f 77 2e 0a 0a 20 20 20 47 72 61 68 | below... Grah| 00001a50 61 6d 20 4b 69 6e 67 0a 20 20 20 35 34 20 4e 65 |am King. 54 Ne| 00001a60 61 74 68 20 72 6f 61 64 2c 0a 20 20 20 53 74 2e |ath road,. St.| 00001a70 20 4a 75 64 65 73 2c 0a 20 20 20 50 6c 79 6d 6f | Judes,. Plymo| 00001a80 75 74 68 2e 0a 20 20 20 44 65 76 6f 6e 2e 0a 0a |uth.. Devon...| 00001a90 20 20 20 50 4c 34 20 38 54 47 0a | PL4 8TG.| 00001a9b
.