AMATEUR TELEVISION. 
          A PROGRAMME FOR THE 
           BBC/B AND MASTER      
                          Instructions for use 
     
    This programme is for the BBC/B and Master computers. As you are no doubt 
    aware the Memory space  on  an  Acorn  machine  is,  to  say  the  least, 
    restricted. This programe is split over 2 seperate programes and requires 
    PAGE to be at &1900 or lower. (&E00 on the Master). In the event of a "no 
    room"  error,  check any Rom's fitted to your Machine to ensure that they 
    do not claim workspace, thereby raising PAGE. These programmes have  been 
    fully  tested  on  a  Standard BBC/B with Acorn and Watford DFS, and on a 
    Standard Master. No problems were encountered. 
     
    This disc is not protected in the normal way,  after  all,  you  probably 
    spend  threequarters  of your time breaking silly protection routines any 
    way. No, you can take any amount of backup copies for your own  use,  you 
    can change it around, add bits, delete bits (Providing you let me, G8VEH, 
    know about any improvements so that I can incorporate them  in  the  next 
    update!).  But, if you give away a copy to a friend, beware it will burst 
    into flames at some unspecified time and self destruct in 5 seconds. 
     
    Boot the disc by holding down the Shift/Break keys, and  you  should  see 
    the  Main Menu appear. On this section of the programe are  8 testcards a 
    Cross Hatch screen, a  MaidenHead  Calculator  and  a  Permanent  Message 
    Screen. In addition you can access the BBC operating System to issue 
    * Commands without Exiting from the  programme.  Press  key  Y,  and  the 
    second  programme  will  load.  This  provides  facilities for setting up 
    Various Message Screens that can be saved and  loaded  from  disc  and  a 
    Contest  Number  Routine. The Y key will return you to the previous 
    testcard programme 
     
    It is proposed to customise each disc before despatch, but Knowing Murphy 
    as  I  do, you have probably received a non-customised disc. Also you may 
    wish to change the wording of the various messages on the Test Cards. The 
    following notes should be of help to you 
     
    Generally  a  screen  is  loaded  from  disc, that poor memory again, and 
    captions added from within the programe  using  PROCBIG.  This  procedure 
    requires  4  Parameters,  ProcBig("Caption",Left  hand  position, height, 
    space between letters). Boot the disc and press key  "A".  You  have  now 
    loaded  a  file  called "CARDS". This is the main testcard programme, and 
    can now be altered and modified to suit your  requirements.  As  supplied 
    the file is locked, and so after you have altered it , and proved that it 
    still runs okay, unlock the file by issuing the  command  *ACCESS  CARDS. 
    Re-save  the  programe  to  the  disc  using the command SAVE"CARDS". Now 
    relock the file to prevent accidental erasure using  the command  *ACCESS 
    CARDS  L.  Note. It is recomended that you take a backup copy of the disc 
    and carry out all alterations on the backup copy.This way you will  still 
    have the original disc if anything goes wrong. 
     
    1. BATC TEST CARD. 
    list line 340 (L.340) and you will see the position for your call sign 
    This is set for a 5 Character Call. If your call is different, change the 
    left hand parameter (LHE) from 435 in accordance with the following 
     
    4 letter call (468)..  5 letter call (435)..  6 letter call (402) 
    7 letter call (369)..  8 letter call (335) 
     
    2. COLOUR BARS 1 
    list line 740. There are 17 spaces for the insertion of your Caption. You 
    should  add  30  to  the  LHE  for each character/space omitted. This may 
    require fine tuning to ensure it is centred 
     
    3. AMATEUR TEST CARD 
    List  line  370. This is set to a 5 letter Callsign and can be altered as 
    in the BATC Test Card. Use the following LHE figures 
    4 letter call.. (450)   5 letter call..(420)   6 letter call..(370) 
    7 letter call.. (360)   8 letter call..(330) 
     
           

    4. COLOUR BARS 2. 
    list  line  470. there are 17 spaces for your Call Sign and Name etc. Add 
    30 to the LHE for each Character or Space omitted. 
     
    5. BATC LOGO. 
    list lines 550 and 560 (L.550,560). these lines place a call sign on each 
    side of the LOGO. Again these are set for a 5  letter  call  and  can  be 
    varied as follows 
                   Line 550                            Line 560 
         4 letter call......(100)           4 letter call......(820) 
         5 letter call......(90)            5 letter call......(770) 
         6 letter call......(50)            6 letter call......(690) 
         7 letter call......(80)            7 letter call......(720) 
         8 letter call.......(0)            8 letter call......(690) 
    Again these LHE parameters can be fine tuned to your  choice.  Lines  580 
    and  590  insert a Maidenhead Locator on the supplied programme, but feel 
    free to change it. 
     
    6. CHANNEL 4 TEST CARD 
    list  line  320.  There are 12 spaces available for the insertion of your 
    call and name etc. Add 30 to the LHE for each space omitted. 
     
    7. UK MAP. 
    List lines 420 and 430. 420 is the Call Sign and 430 can be for your name 
    etc. use the following LHE parameters as before. 
                 line 420                          Line 430 
                                            3 letter name.....(470)    
         4 letter call.....(810)            4 letter name.....(440) 
         5 letter call.....(780)            5 letter name.....(410) 
         6 letter call.....(750)            6 letter name.....(380) 
         7 letter call.....(690)            7 letter name.....(350) 
         8 letter call.....(680)            8 letter name.....(320)  Etc. 
     
    Line  400  flashes  a  Black and white spot to indicated your approximate 
    location. Adjust LHE and Height parameters to suit your position  on  the 
    map.  Line 440 is the Maidenhead locator position and you can insert your 
    locator here. 
     
    8. UNION JACK. 
    list line 760. There are 14 spaces available for your call sign and name. 
    add 30 to the LHE for each character omitted,  with  fine  adjustment  to 
    suit. 
     
    9. CROSS HATCH SCREEN 
    list line 1110. there are 17 spaces for your message. Add 30 to  the  LHE 
    for each Character/Space that you omit. 
     
    (at this point you should resave the file as "CARDS" onto your disc. 
     
    10. PERMANENT MESSAGE SCREEN. (How to use) 
    list line 80. Change the Data to  suit  your  requirements.  Remember  to 
    seperate  each piece of Data with a Comma. Each piece of Data can have up 
    to 18 Characters/Spaces and you must have 5 data items. Blank  lines  can 
    be defined as " " i.e space between quotes in the Data line. 
     
    11.MAIDENHEAD CALCULATOR. (How to use) 
    type in your own site Maidenhead Locator, which must be in the form of  a 
    valid  locator  i.e.  2  letters,  2  numbers  and 2 letters. You will be 
    advised if the Locator does not conform to this pattern. Press return and 
    type in the Locator of your contact. The resultant distance will be given 
    in Kilometres. 
     
    12. ACCESS TO OPERATING SYSTEM (How to use) 
    Key B from the main menu will access the Operating System and can be used 
    to Catalogue a Disc, Change Drives or infact any OP System  command  that 
    does'nt  use  Memory  space.  Beware  of  using commands such as *Backup, 
    *Compact or *Copy as these will corrupt the programe in memory 
    The  second  Programe  contains  the  Message  Screen and Contest Numbers 
    routines. Access this by pressing the "Y" key from the main menu. 
     
           

    13. MESSAGE SCREEN. 
    You  are invited to load a previously saved message from disc. Answer "Y" 
    to this and type in a file name. There are 2 demonstration files  on  the 
    disc,  DEMO  and  HELPME.  Use  only Capital letters. You can specify the 
    drive number in the usual way i.e. :1.FILENAM  .This file  will  then  be 
    loaded  and displayed in 5 rows of 18 characters. Press return or any key 
    (Except TAB and ESCAPE) to return to the Message Input Screen 
     
    Tab will re-display the previous message from the Input Screen, and you 
    will be asked if you wish to save it to disc. Answer Y or N (infact any 
    key will answer No).  
     
    Answering No to the original "Do you wish to load a  Message  from  Disc" 
    Input Prompt will now display the Manual Input Screen. Type in 5 lines of 
    text each up to 18 characters long. Blank lines can be input as "Return". 
    If  you  type in more than 18 Characters (Watch the Stars), an error will 
    be generated and you will be given the opportunity to  retype  the  line. 
    After  the  5th  line  is input, you will be asked if you wish to save to 
    disc. Respond "Y", and type in a file name, again normal Drive parameters 
    can  be included. The message will then be saved to disc and displayed on 
    the Screen. Text is automatically centred on the screen 
     
    If you answer "N", (Again any key will answer No), the  message  will  be 
    displayed  without saving it. However by using the TAB key from the Input 
    Screen you can obtain a second chance to save your Masterpiece. 
     
    Any key (Except TAB) will return you to the Input Screen  when  you  have 
    finished with a message 
     
    Pressing  ESCAPE at any time during the use of any of the Programmes will 
    return you to the relevant Main Menu. 
     
    14. CONTEST NUMBERS 
    Enter  a  4 figure contest number, and it will be displayed on the screen 
    in large sized Numbers. Only  Valid  entries  of  4  x  NUMBERS  will  be 
    accepted. 
     
    Well,  there it is, I hope you will enjoy using the Programmes as much as 
    I have. Please do let us Know if you can suggest any improvements. If you 
    find any Bugs, please keep them secret.(Thanks to G4YLG for the BATC Test 
    Card Screen.) 
     
    Ron Bray G8VEH. (QTHR) 
    ********************************************************************** 
     
    This  Programme  is available on 80 Track Disc (or 40 Track Double sided) 
    Price 8.50 from the Treasurer, Worthing Video Repeater  Group,  (GB3VR), 
    Mr. R. Stephens, Toftwood, Mill Lane, High Salvington, Worthing.( Cheques 
    payable to Worthing Video Repeater Group.) 
      
    Order form.  
     
    Please Supply a copy of the Amateur Television Programe for the BBC  
     
    Christian Name.........................Surname..................... 
     
    Address............................................................ 
     
    Nearest Large town or city......................................... 
     
    Call Sign.....................Maidenhead Locator.................... 
                
     
     
    G8VEH Ron Bray 14 Hadlow Way Lancing West Sussex. Lancing 763978