Text: DTW8

       Name: DTW8                                                    [Show more]
       Type: Variable
   Category: Text
    Summary: A mask for capitalising the next letter in an extended text token
  Deep dive: Extended text tokens
    Context: See this variable in context in the source code
 References: This variable is used as follows:
             * DETOK2 uses DTW8
             * MT19 uses DTW8
             * TT26 uses DTW8


 This variable is only used by one specific extended token, the {single cap}
 jump token, which capitalises the next letter only. It has two values:

   * %11011111 = capitalise the next letter

   * %11111111 = do not change case

 The default value is %11111111 (do not change case).

 The flag is set to %11011111 (capitalise the next letter) by jump token 19,
 {single cap}, which calls routine MT19 to change the value of DTW.

 The flag is set to %11111111 (do not change case) at the start of DASC, after
 the letter has been capitalised in DETOK2, so the effect is to capitalise one
 letter only.

 The letter to print is AND'd with DTW8 in DETOK2, which capitalises the letter
 by clearing bit 5 (if DTW8 is %11011111). However, this AND is only done if at
 least one of the following is true:

   * Bit 7 of DTW2 is set (we are not currently printing a word)

   * Bit 7 of DTW6 is set (lower case has been enabled by jump token 13, {lower
     case}

 In other words, we only capitalise the next letter if it's the first letter in
 a word, or we are printing in lower case.


.DTW8

 EQUB %11111111