split farcall functions into engine/farcall.asm

main.asm

@@ -2906,60 +2906,7 @@ Function2d43: ; 2d43
 ; 2d54
 
 
-FarCall_de: ; 2d54
-; Call a:de.
-; Preserves other registers.
-
-	ld [hBuffer], a
-	ld a, [hROMBank]
-	push af
-	ld a, [hBuffer]
-	rst Bankswitch
-	call .de
-	jr ReturnFarCall
-
-.de
-	push de
-	ret
-; 2d63
-
-
-FarCall_hl: ; 2d63
-; Call a:hl.
-; Preserves other registers.
-
-	ld [hBuffer], a
-	ld a, [hROMBank]
-	push af
-	ld a, [hBuffer]
-	rst Bankswitch
-	call Function2d82
-; 2d6e
-
-ReturnFarCall: ; 2d6e
-; We want to retain the contents of f.
-; To do this, we can pop to bc instead of af.
-	
-	ld a, b
-	ld [$cfb9], a
-	ld a, c
-	ld [$cfba], a
-	
-; Restore the working bank.
-	pop bc
-	ld a, b
-	rst Bankswitch
-	
-	ld a, [$cfb9]
-	ld b, a
-	ld a, [$cfba]
-	ld c, a
-	ret
-; 2d82
-
-Function2d82: ; 2d82
-	jp [hl]
-; 2d83
+INCLUDE "engine/farcall.asm"
 
 
 Predef: ; 2d83