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/pet/Makefile

@@ -32,7 +32,8 @@ OBJS =	_scrsize.o	\
         kreadst.o       \
         ksetlfs.o       \
         ksetnam.o       \
-        randomize.o
+        randomize.o	\
+	revers.o	
 
 all:	$(OBJS)
 

libsrc/pet/cputc.s

@@ -8,10 +8,10 @@
     	.export	       	_cputcxy, _cputc, cputdirect, putchar
 	.export		newline, plot
 	.import		popa, _gotoxy
-	.import		xsize, revers
+	.import		xsize
 
 	.include	"pet.inc"
-	.include	"../cbm/cbm.inc"
+;	.include	"../cbm/cbm.inc"
 
 _cputcxy:
 	pha	    	    	; Save C
@@ -98,7 +98,7 @@ plot:	ldy	CURS_Y
 ; position in Y
 
 putchar:
-    	ora	revers	  	; Set revers bit
+    	ora	RVS		; Set revers bit
        	ldy    	CURS_X
 	sta	(SCREEN_PTR),y	; Set char
 	rts

libsrc/pet/pet.inc

@@ -10,6 +10,7 @@ MEMSIZE	 	= $34		; Size of memory installed
 TIME            = $8D           ; 60HZ clock
 ST     	       	= $96  	       	; IEC status byte
 KEY_COUNT      	= $9E  	       	; Number of keys in input buffer
+RVS		= $9F		; Reverse flag
 CURS_FLAG	= $A7  	       	; 1 = cursor off
 CURS_BLINK	= $A8  	       	; Blink counter
 CURS_CHAR	= $A9  	       	; Character under the cursor
@@ -29,7 +30,7 @@ KEY_BUF		= $26F 	       	; Keyboard buffer
 ;----------------------------------------------------------------------------
 ; PET ROM type detection
 
-PET_DETECT      = $FFFB
+PET_DETECT      = $FFFB			      
 PET_2000        = $CA
 PET_3000        = $FC
 PET_4000        = $FD

libsrc/pet/revers.s

@@ -0,0 +1,27 @@
+;
+; Ullrich von Bassewitz, 07.08.1998
+;
+; unsigned char revers (unsigned char onoff);
+;
+
+      	.export		_revers
+
+        .include        "pet.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
+