Routines
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48695: Print Character
Used by the routines at PrintString, PrintStringAndANewline, Handler_UserInput, Parser_MatchInputWord, Handler_DisplayRoom and PrintInputPrompt.
Print one character, scrolling the text window when the cursor reaches its edge.
Input
A Character to print
PrintCharacter 48695 PUSH AF Keep the character safe on the stack.
48696 LD A,(23689) Jump to PrintCharacter_Direct if the line byte of S_POSN (23689) is not row 3.
48699 CP 3
48701 JR NZ,PrintCharacter_Direct
48703 POP AF Restore the character from the stack, leaving a copy.
48704 PUSH AF
48705 CP 13 Jump to PrintCharacter_CheckColumn if this is not a newline (13).
48707 JR NZ,PrintCharacter_CheckColumn
A newline scrolls the text window and prints nothing.
48709 CALL ScrollScreen Call ScrollScreen.
48712 POP AF Discard the character from the stack.
48713 RET Return.
Check the column.
PrintCharacter_CheckColumn 48714 LD A,(23688) Call ScrollScreen if *S_POSN is column 1.
48717 CP 1
48719 CALL Z,ScrollScreen
Print the character.
PrintCharacter_Direct 48722 POP AF Restore the character from the stack.
48723 RST 16 Print it with PRINT_A_1.
48724 RET Return.
View the equivalent code in;
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