Routines
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C29A: Draw Compass Text
Used by the routines at StartGame and CheckRotateKey.
Draws the four characters of the compass text in the status panel, using one set of characters when the view is the normal way round and another set when the view has been rotated by half a turn.
Normal view Rotated view
compass-text-normal compass-text-rotated
Input
DE Preserved
Choose the characters and colour for the way the view faces.
DrawCompassText C29A PUSH DE Stash DE on the stack.
C29B LD A,($BBBA) Fetch the flag that tells whether the view is turned round.
C29E AND $01 Jump to DrawCompassText_Rotated if the view is turned round.
C2A0 JR NZ,DrawCompassText_Rotated
C2A2 LD HL,$7AAF Point at the characters for the normal view.
C2A5 LD A,$45 Use bright cyan ink (attribute 45).
Print the four characters of the compass text.
DrawCompassText_Draw C2A7 EX AF,AF' Stash the colour on the stack.
C2A8 LD ($BBAC),HL Set the font to the compass characters.
C2AB LD HL,$50DB Set the screen position of the compass text to 50DB (in the screen buffer).
C2AE LD DE,$C2C4 Point at the list of four characters.
C2B1 LD B,$04 Set a counter for the four characters.
DrawCompassText_Loop C2B3 LD A,(DE) Print a character of the compass text, and loop back until all four have been printed.
C2B4 INC DE
C2B5 CALL PrintCharacterWithAttribute
C2B8 INC L
C2B9 DJNZ DrawCompassText_Loop
C2BB POP DE Restore DE from the stack and return.
C2BC RET
Use the characters and colour for the turned view.
DrawCompassText_Rotated C2BD LD HL,$7ACF Point at the characters for the turned round view.
C2C0 LD A,$43 Use bright magenta ink (attribute 43).
C2C2 JR DrawCompassText_Draw Jump to DrawCompassText_Draw to print the compass text.
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