For the CBM platforms, make revers() machine dependent and use the RVS flag

of the different machines instead of a separate one.
For the C128, make the textcolor() function work in 40 and 80 column mode.


git-svn-id: svn://svn.cc65.org/cc65/trunk@1787 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/cbm510/Makefile

@@ -49,6 +49,7 @@ OBJS =	_scrsize.o	\
 	pokesys.o	\
         randomize.o     \
 	readjoy.o	\
+	revers.o	\
 	rs232.o		\
 	tgi_mode_table.o
 

libsrc/cbm510/cbm510.inc

@@ -174,8 +174,7 @@ rs232head	     = $037C
 rs232tail	     = $037D
 PgmKeyEnd	     = $0380
 PgmKeySeg	     = $0382
-PgmKeySize	     = $0383
-rvsFlag		     = $0397
+RVS		     = $0383
 linetmp		     = $0398
 LastPrtChar	     = $0399
 InsertFlag	     = $039A
@@ -188,7 +187,6 @@ SegSave		     = $03A0
 TabStopTable	     = $03A1	; 80 bits for tabstops
 KeyBuf		     = $03AB	; Keyboard buffer
 funvec		     = $03B5	; Vector for function key handline
-FunKeyTmp	     = $03B7
 sedt3		     = $03B9
 MoniSegSave	     = $03f0
 wstvec		     = $03F8

libsrc/cbm510/cputc.s

@@ -10,7 +10,7 @@
 
         .import         PLOT
 	.import		popa, _gotoxy
-	.import		xsize, revers
+	.import		xsize
 
 	.include	"cbm510.inc"
 
@@ -97,7 +97,7 @@ plot:	ldy	CURS_X
 ; position in Y
 
 putchar:
-    	ora	revers	    	; Set revers bit
+    	ora	RVS		; Set revers bit
        	ldy    	CURS_X
 	sta	(SCREEN_PTR),y 	; Set char
 	ldx	IndReg

libsrc/cbm510/revers.s

@@ -0,0 +1,27 @@
+;
+; Ullrich von Bassewitz, 07.08.1998
+;
+; unsigned char revers (unsigned char onoff);
+;
+
+      	.export		_revers
+
+        .include        "cbm510.inc"
+
+.proc   _revers
+
+	ldx    	#$00		; Assume revers off
+	tay			; Test onoff
+	beq	L1		; Jump if off
+	ldx	#$80		; Load on value
+        ldy	#$00		; Assume old value is zero
+L1:     lda    	RVS             ; Load old value
+	stx	RVS             ; Set new value
+	beq	L2		; Jump if old value zero
+	iny			; Make old value = 1
+L2:	ldx	#$00		; Load high byte of result
+	tya			; Load low byte, set CC
+	rts
+
+.endproc
+