20_09_87/F\INFO

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20_09_87/F\INFO

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 » telesoftware2.adl
Filename:	20_09_87/F\INFO
Read OK:	✔
File size:	2232 bytes
Load address:	0000
Exec address:	0000

File contents

__________________________________________________________________________

These pools prediction programs have been completely overhauled for the
current season, and incorporate several ammendments to speed up their
operation and improve their ease of use. This process has inevitably led
to difficulties with some makes of adapter, and it is recommended that the
final paragraph is noted before using the programs.

__________________________________________________________________________

Pools Prediction Programs:
==========================

This suite of programs uses CEEFAX data to predict the football results
for the current week. There are three different programs:

1. Match
2. Foot
3. Results

Due to the memory constraints of the BBC micro, it has not been possible
to implement a data integrity check (CRC) of the requested CEEFAX pages,
therefore a good signal to your adapter is important.

1. Match:
=========

From about Wednesday onwards, BBC2 CEEFAX transmit the following
Saturday's fixture list. The program "Match" will analyse these
transmissions and create a data file of match data on disc. This file can
then be used by FOOT as match data, to avoid having to type in by hand the
teams playing in each match.

The program will check to see if the fixtures list is actually being
transmitted. If it finds it, the CEEFAX pages required are listed on
screen, with each found page being reported.

The data file is created automatically as each page is found. Several of
the system's page grabbers are used, which gives a considerable time
saving over previous versions of this program. As processing is carried
out, the match number (directly relating to the pools coupon number) of
each match found is briefly displayed on screen.

The program will inform you if the fixtures list is not yet available from
CEEFAX. If this is so, the program should be run again later in the week.

2. Foot:
========

This is the main prediction program. Before using this, however, some
things must be noted. The program uses CEEFAX data to compile information
from the league tables about each team playing in the league. This
information is then used to predict the outcome of the match. It is
important to understand how this process works, as the user must provide
his own algorithm using this data! The information is kept in the
following arrays:

ITEM                        HOME TEAM       AWAY TEAM
====                        =========       =========
League points gained:         PT(m)           PT(n)
Total matches played:         P(m)            P(n)
Goals scored for team:        F(m)            F(n)
Goals scored against team:    A(m)            A(n)
Games lost:                   L(m)            L(n)
Games won:                    W(m)            W(n)
Games drawn:                  D(m)            D(n)

A formula must be devised to use as much of this information as is
necessary to produce a winning solution. The formula must be of the form:

 = (Strength of away team) - (strength of home team)

i.e. it must calculate a value for the home team, then a value for the
away team, then subtract one result from the other. Calculations that
produce results closest to zero are considered more likely to be drawn
games than those producing high values. So two teams producing a similar
number will be more likely to result in a draw than two teams producing
very different values. The formula included in the program is very simple,
and only compares the two teams league positions. To give some idea of how
to enter a suitable formula, some examples of calculating team strength
follow:

 =(PT(m)+(D(m)*3)-W(m))-(PT(n)+(D(n)*3)-W(n))

This uses points gained, drawn games and games won for each team

 =(P(m)/D(m))-(P(n)/D(n))

calculates the number of matches played, divided by the number of matches
drawn for each team

 =PT(m)-PT(n)

calculates the number of points gained for each team

 =(P(m)/L(m))-(P(n)/W(n))

studies the number of games lost by the home team, and the number of games
won by away team (a perfectly "legal" if not very logical formula!)

These formulae can be very simple such as:

 =D(m)-D(n)

which compares the number of drawn matches of each team, or more complex,
such as:

 =((L(m)+(P(m)*20))*D(m))-((W(n)+(P(n)*20))*D(n))

which considers matches drawn, lost, won, etc. A winning solution is
likely to be even more involved! It should be remembered that,
particularly early in the season, several of these values will be equal to
zero, and an error will result if your formula includes a 'division
by zero'!

Your desired formula should replace the one given in line 5000 of the
program, then the new version saved to disc before use.

When the program is run, you are asked if the match data is to be read
from disc. This is only possible if it has previously been saved to disc
using the program "Match" (see above), but will save a lot of time if it 
can be read from a disc file. If the appropriate data file is not found on
your disc, the question will not be asked.

You are then asked if the league details are to be read from disc. Again,
this may only be done if this data has already been saved to disc from a
previous run of the "Foot" program. (The data is automatically saved to
disc each time "Foot" is run.) The question is not raised if the league
information is not available from disc.

If the league data has been taken from CEEFAX, you will then be offered a
chance to see (or print out) a list of the team names and their
corresponding numbers. This option is not available if the data is read
from disc, as the program then relies on a compressed version of the team
names which may not be very much help to you! The team names and numbers
will be needed later if you have opted to manually enter the fixtures
list. If a printout of this list is required, simply set your printer "on
line" before selecting this option.

The program proceeds to request the match data in numeric form. If the
data is read from disc, the fixtures list will be read in, stopping at the
bottom of each screen to allow you to look for any necessary corrections.
Press SHIFT to scroll the screen. If this data needs to be entered
manually, type in the appropriate team number at the prompt, as taken from
the team list offered earlier. Any corrections can be made after all the
match data has been entered.

The program will then calculate the most likely 18 matches to result in a
draw. If you want this selection sent to your printer, ensure that your
printer is "on line". Otherwise it will be sent to the screen only.

3. Results:
===========

During the execution of "Foot", a data file is created on disc of the
matches predicted. "Results" will analyse the actual results as
transmitted by CEEFAX, and calculate the maximum pools points that have
been gained using the given forecast.

If you use a pools entry with more (or less) than ten selections, the
appropriate line at the beginning of the program must be altered. The
program calculates the maximum points possible using a Full Perm plan,
but also presents the results in pools points format for normal checking
of a coupon.

The results are broadcast on BBC1 on a Saturday afternoon/evening, and
then are transferred to BBC2 for the early part of the following week.
The program detects the day on which it is run, and will select the
correct channel and page numbers automatically. (i.e. if run on Saturday,
it will select BBC1, pages 331 onwards, but if run on, say, Monday, it
will select BBC2, page 341.) A check is carried out to ensure the actual
results are obtained, and not the half-time results or other data. A
report will be given, and the program terminated if the results are not
found.

If a match is declared void, or a result decided by the Pools panel, the
correct pools points will be found. Such situations will be reported when
the results are listed by the program.

This program uses several of the system's page grabbers, resulting in a
much faster execution time than previous versions. Whilst each page from
CEEFAX is being processed, the screen will indicate briefly which
particular pools coupon match number is being studied at the time.


                                     (c) Jeremy Brayshaw   September 1987


Note: The programs have been written to operate with the BBC Microcomputer
System Teletext Adapter (the Acorn system) and ATS software. They are not
guaranteed to function correctly on other makes of adapter, or with the
Acorn TFS. This is because some other teletext adapters use less versatile
teletext reception chips, and it is not possible to implement multiple
simultaneous page grabbers. Systems without ATS may not use the same
commands, or implement them in the same way.

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*
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*
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00000940  54 45 4d 20 20 20 20 20  20 20 20 20 20 20 20 20  |TEM             |
00000950  20 20 20 20 20 20 20 20  20 20 20 48 4f 4d 45 20  |           HOME |
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00000980  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |                |
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00000a50  64 20 61 67 61 69 6e 73  74 20 74 65 61 6d 3a 20  |d against team: |
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00000a70  20 20 20 41 28 6e 29 0d  47 61 6d 65 73 20 6c 6f  |   A(n).Games lo|
00000a80  73 74 3a 20 20 20 20 20  20 20 20 20 20 20 20 20  |st:             |
00000a90  20 20 20 20 20 20 4c 28  6d 29 20 20 20 20 20 20  |      L(m)      |
00000aa0  20 20 20 20 20 20 4c 28  6e 29 0d 47 61 6d 65 73  |      L(n).Games|
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00002010  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |                |
00002020  20 20 20 20 20 20 20 20  20 20 28 63 29 20 4a 65  |          (c) Je|
00002030  72 65 6d 79 20 42 72 61  79 73 68 61 77 20 20 20  |remy Brayshaw   |
00002040  53 65 70 74 65 6d 62 65  72 20 31 39 38 37 0d 0d  |September 1987..|
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00002080  20 77 69 74 68 20 74 68  65 20 42 42 43 20 4d 69  | with the BBC Mi|
00002090  63 72 6f 63 6f 6d 70 75  74 65 72 0d 53 79 73 74  |crocomputer.Syst|
000020a0  65 6d 20 54 65 6c 65 74  65 78 74 20 41 64 61 70  |em Teletext Adap|
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00002100  72 65 63 74 6c 79 20 6f  6e 20 6f 74 68 65 72 20  |rectly on other |
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00002120  2c 20 6f 72 20 77 69 74  68 20 74 68 65 0d 41 63  |, or with the.Ac|
00002130  6f 72 6e 20 54 46 53 2e  20 54 68 69 73 20 69 73  |orn TFS. This is|
00002140  20 62 65 63 61 75 73 65  20 73 6f 6d 65 20 6f 74  | because some ot|
00002150  68 65 72 20 74 65 6c 65  74 65 78 74 20 61 64 61  |her teletext ada|
00002160  70 74 65 72 73 20 75 73  65 20 6c 65 73 73 20 76  |pters use less v|
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000021b0  6c 65 6d 65 6e 74 20 6d  75 6c 74 69 70 6c 65 0d  |lement multiple.|
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00002200  73 61 6d 65 0d 63 6f 6d  6d 61 6e 64 73 2c 20 6f  |same.commands, o|
00002210  72 20 69 6d 70 6c 65 6d  65 6e 74 20 74 68 65 6d  |r implement them|
00002220  20 69 6e 20 74 68 65 20  73 61 6d 65 20 77 61 79  | in the same way|
00002230  2e 0d                                             |..|
00002232

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