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- PROCEDURE GotoXY (X_pos, Y_pos : Integer) ;
-
- { Procedure to position cursor at co-ordinates X,Y for Micro-Term ACT-IV;
- duplicates functions of "GotoXY" in Pascal/M & UCSD.
- Change to proper control codes for your terminal, if necessary.
- Note that to avoid actually printing characters on the screen, the
- numbers are made negative before sending the "character" to the terminal;
- i.e., the range of "X_pos" is actually -128 to -47, rather than 0 to 80,
- and for "Y_pos", -128 to -105, rather than 0 to 23. It's not clear
- whether this is a peculiarity required by Pascal/Z or by the ACT-IV,
- so different strategies may be necessary for different terminals. }
-
- CONST
- Offset = 128 ; { Used to reduce X and Y numbers to ranges shown above }
-
- BEGIN { GotoXY }
-
- Write (Chr (20)) ; { Signals ACT-IV that position co-ordinates follow }
-
- Write (Chr (Y_pos - Offset)) ; { Send row number first,... }
-
- Write (Chr (X_Pos - Offset)) ; { ...then column number }
-
- END { GotoXY } ;
- - Offset)) ; { Send row number first,... }
-
- Write (Chr (X_Pos - Offset)) ; { ...then column numd. }
-
- BEGIN { Ucase }
-
- IF Ord (Letter) IN [Ord ('a')..Ord ('z')] THEN
- Ucase := Chr (Ord (Letter) - Ord ('a') +