DE,About the Testcards
DS,inserter
SP,\\VBOXSVR\VirtualShare\_ Teefax\P791.tti
PN,79101
SC,0001
PS,C000
RE,0
OL,0,XXXXXXXXTEEFAX mpp DAY dd MTH C hh:nn.ss
OL,1,Q||||||||||||||||||||||||||||||||||||||\
OL,2,A]S *o?%//h?/%//h?/%~/}j?o4/}h?/%   \
OL,3,A]S  j5 ,,*-l4  j5  ,j=n1 *-l4   \
OL,4,A]S  j5 ||h|~%  *}|4 j5j5|?h|~%   \
OL,5,A]S (,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,$   \
OL,6,Q###################################### 
OL,7,     MC]AThe 1978 BBC Test Page  \      
OL,9,S      ##########################       
OL,10,BThis engineering test page was copied  
OL,11,Bbyte by byte from a photograph in Alan 
OL,12,BPemberton's collection.                
OL,13,B(pembers.freeserve.co.uk/teletext/)    
OL,15,BA photograph from a decoder displaying 
OL,16,Bvisible control codes allowed an exact 
OL,17,Bcopy of the page to be transcribed.    
OL,19,BThe clock cracker uses a control code  
OL,20,Blater defined for black text therefore 
OL,21,Bmany newer televisions will render the 
OL,22,Bpage incorrectly.               G(1/3) 
OL,24,A1978 version B"colour stripes" version 
FL,792,793,790,790,8ff,100
PN,79102
SC,0002
PS,C000
RE,0
OL,0,XXXXXXXXTEEFAX mpp DAY dd MTH C hh:nn.ss
OL,1,Q||||||||||||||||||||||||||||||||||||||\
OL,2,A]S *o?%//h?/%//h?/%~/}j?o4/}h?/%   \
OL,3,A]S  j5 ,,*-l4  j5  ,j=n1 *-l4   \
OL,4,A]S  j5 ||h|~%  *}|4 j5j5|?h|~%   \
OL,5,A]S (,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,$   \
OL,6,Q###################################### 
OL,7,     MC]AThe 1978 BBC Test Page  \      
OL,9,S      ##########################       
OL,10,BThe Texas Instruments Tifax character  
OL,11,Bgenerator ROM chip contained all the   
OL,12,Bglyphs for rendering teletext. It also 
OL,13,Bcontained extra glyphs for the control 
OL,14,Bcodes that are usually not displayed.  
OL,15,BA teletext decoder could be altered to 
OL,16,Bshow these glyphs, thus displaying all 
OL,17,Bthe normally hidden details of a page. 
OL,19,BThe photograph was taken on Friday the 
OL,20,B25th of August, 1978.                  
OL,22, PressAREDGto see this testcard. G(2/3) 
OL,24,A1978 version B"colour stripes" version 
FL,792,793,790,790,8ff,100
PN,79103
SC,0003
PS,C000
RE,0
OL,0,XXXXXXXXTEEFAX mpp DAY dd MTH C hh:nn.ss
OL,1,Q||||||||||||||||||||||||||||||||||||||\
OL,2,A]S *o?%//h?/%//h?/%~/}j?o4/}h?/%   \
OL,3,A]S  j5 ,,*-l4  j5  ,j=n1 *-l4   \
OL,4,A]S  j5 ||h|~%  *}|4 j5j5|?h|~%   \
OL,5,A]S (,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,$   \
OL,6,Q###################################### 
OL,7,   MC]A"Colour stripes" Test Page  \    
OL,9,S    ##############################     
OL,10,BLater the test page was modified with  
OL,11,Bthe incorporation of a row of coloured 
OL,12,Bpatches below theU]BTest Page  \label. 
OL,14,BVariations of this card were used for  
OL,15,Bmany years. The card was often used on 
OL,16,Bthe in-vision "Pages from Ceefax" and  
OL,17,Ba version was included on the "British 
OL,18,BGarden Birds" BBC Laserdisc.           
OL,20, PressBGREENGto see this testcard.      
OL,22,                                 G(3/3) 
OL,24,A1978 version B"colour stripes" version 
FL,792,793,790,790,8ff,100