Implemented __syschdir on CBM. As getcwd returns a cached directory any direct access to __curunit would cause inconsistencies. Therefore __curunit was renamed to curunit to prohibit user access.

git-svn-id: svn://svn.cc65.org/cc65/trunk@5857 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/cbm/initcwd.s

@@ -5,7 +5,7 @@
 ;
 
 	.export		initcwd, devicestr
-	.import		__curunit, __cwd
+	.import		curunit, __cwd
 	.import		pusha0, tosudiva0
 	.importzp	sreg, ptr1, ptr2
 
@@ -16,7 +16,7 @@ initcwd:
 	ldx	#>__cwd
 	sta	ptr2
 	stx	ptr2+1
-	lda	__curunit
+	lda	curunit
 	; Fall through
 
 ;------------------------------------------------------------------------------
@@ -28,11 +28,11 @@ devicestr:
 	jsr	tosudiva0
 	ldy	#0
 	lda	sreg
-	beq	:+		; >=10
+	beq	@L0		; >=10
 	add	#'0'
 	sta	(ptr2),y
 	iny
-:	lda	ptr1		; rem
+@L0:	lda	ptr1		; rem
 	add	#'0'
 	sta	(ptr2),y
 	iny