Added long_mul function

Makefile

@@ -1,3 +1,6 @@
+-include defs.mak
+
+
 SDCC ?= sdcc
 SDAR ?= sdar
 STCCODESIZE ?= 8192
@@ -17,7 +20,20 @@ LIBSRC = uart_init_.c uart_send_chr.c uart_send_str.c \
 	 rotary_encoder_stat.c \
 	 sevenseg_dec.c sevenseg_dec_inv.c \
 	 int_to_bcd.c getbutton.c \
-	 getpin.c setpin_lo.c setpin_hi.c setpin.c getport.c
+	 getpin.c setpin_lo.c setpin_hi.c setpin.c getport.c \
+	 long_xadd.c long_xsub.c long_xset.c long_xrlc.c long_xdiv.c long_xcpy.c long_xtobcd.c \
+	 multest.c \
+	 bcd_add.c bcd_getsig.c bcd_invert.c bcd_9cpl.c bcd_addbyte.c bcd_shr.c \
+	long_rrc__.c long_rlc__.c \
+	long_tobcd__.c long_tobcd.c \
+	bcd_tolong__.c bcd_tolong.c \
+	long_addbyte__.c long_addbyte.c \
+	long_add__.c long_add.c \
+	long_1cpl__.c long_invert__.c long_invert.c \
+	long_sub__.c \
+       long_div__.c	long_div.c  \
+       long_fill__.c long_mul__.c long_mul.c
+
 
 LIBOBJ =$(patsubst %.c,%.rel, $(LIBSRC))
 LIBNAME=mc8051fun.lib

bcd.h

@@ -0,0 +1,16 @@
+#ifndef BCD_H_
+#define BCD_H
+
+#include <stdint.h>
+
+uint8_t bcd_add(__idata uint8_t *v1, __idata uint8_t *v2,uint8_t len) __reentrant;
+void bcd_9cpl(__idata uint8_t *v1, uint8_t len) __reentrant;
+void bcd_shr(__idata uint8_t *v, uint8_t len, uint8_t d) __reentrant;
+void bcd_invert(__idata uint8_t *v1, uint8_t len);
+void bcd_addbyte(__idata uint8_t *v1, uint8_t len, uint8_t b) __reentrant;
+uint8_t bcd_getsig(__idata uint8_t*v, uint8_t len);
+
+void long_tobcd(__idata uint8_t *binval, __idata uint8_t *bcdval, uint8_t binlen, uint8_t bcdlen) __reentrant;
+
+#endif
+

bcd_9cpl.c

@@ -0,0 +1,26 @@
+
+#include "bcd.h"
+
+
+void bcd_9cpl(__idata uint8_t *v1, uint8_t len) __reentrant
+{
+	__asm
+
+        mov     a,_bp
+        add     a,#0xfd
+        mov     sp,a
+	mov	r0,dpl
+	pop	ar7
+
+	clr	c
+001$:
+	mov	a,#0x99
+	subb	a,@r0
+	mov	@r0,a
+	inc	r0
+	djnz	r7,001$
+	mov	sp,_bp
+
+	__endasm;	
+}
+

bcd_add.c

@@ -0,0 +1,34 @@
+#include  "mc8051fun.h"
+#include "bcd.h"
+
+#pragma disable_warning 59  // Disable "must return a value" warning
+
+uint8_t bcd_add(__idata uint8_t *v1, __idata uint8_t *v2,uint8_t len) __reentrant
+{
+	(void)v1; (void)v2; (void)len;
+	__asm
+	mov	a,_bp
+	add	a,#0xfd
+	mov	sp,a
+	pop	ar1
+	pop	ar7
+	mov	ar0,dpl
+	clr c
+001$:		
+	mov	a,@r0
+	addc	a,@r1
+	da	a
+	mov	@r0,a
+	inc	r0
+	inc	r1
+	djnz	r7,001$
+	mov	dpl,#0x00
+	jnc	$002
+	inc	dpl
+$002:
+	mov	sp,_bp
+	__endasm;
+}
+
+
+

bcd_addbyte.c

@@ -0,0 +1,43 @@
+
+#include "bcd.h"
+
+#pragma disable_warning 59  // Disable "must return a value" warning
+
+void bcd_addbyte(__idata uint8_t *v1, uint8_t len, uint8_t ab) __reentrant
+{
+	(void)v1; (void)len; (void)ab;
+
+	__asm
+	mov	a,_bp
+	add	a,#0xfd
+	mov	sp,a
+
+	mov	r0,dpl
+	pop	ar7
+	pop	ACC
+	mov	r6,a
+	add	a,#0xb0	; carry will be set if a>=5
+	jc	001$
+	mov	b,#0x00
+	ajmp	004$
+001$:
+	mov	b,#0x99
+004$:
+	mov	a,@r0
+	add	a,r6
+	da	a
+	mov	@r0,a
+	sjmp	002$		
+000$:
+	inc 	r0
+	mov 	a,@r0
+	addc	a,#0x00
+	da	a
+	mov	@r0,a
+002$:
+	djnz	r7,000$
+	mov	sp,_bp
+	__endasm;
+}
+
+

bcd_getsig.c

@@ -0,0 +1,10 @@
+
+#include "bcd.h"
+
+#pragma opt_code_size
+uint8_t bcd_getsig(__idata uint8_t*v, uint8_t len)
+{
+	return v[len-1]>=0x50;
+}
+
+

bcd_invert.c

@@ -0,0 +1,11 @@
+#include "bcd.h"
+
+
+void bcd_invert(__idata uint8_t *v1, uint8_t len) 
+{
+	bcd_9cpl(v1,len);
+	bcd_addbyte(v1,len,1);
+}
+
+
+

bcd_shr.c

@@ -0,0 +1,38 @@
+#include "bcd.h"
+
+
+#pragma disable_warning 59  // Disable "must return a value" warning
+
+void bcd_shr(__idata uint8_t *v, uint8_t len, uint8_t d) __reentrant
+{
+	(void)v; (void)len, (void)d;
+
+	__asm
+	mov	a,_bp
+	add	a,#0xfd
+	mov	sp,a
+
+	pop	ar7	; r7 = len
+	pop	B	; 
+	mov	a,dpl
+	add	a,r7
+	mov	r0,a
+001$:
+	dec	r0
+	mov	a,@r0
+	swap	a
+	mov	r6,a
+	anl	a,#0x0f
+	orl	a,b
+	mov	@r0,a
+	mov	a,r6
+	anl	a,#0xf0
+	mov	b,a
+	djnz	r7,001$
+	
+	mov	sp,_bp
+
+	__endasm;
+}
+
+

bcd_tolong.c

@@ -0,0 +1,33 @@
+#include "mc8051fun.h"
+
+/*
+ * C-Wrapper for bcd_tolong
+ */
+
+void bcd_tolong(__idata uint8_t *bcdval, __idata uint8_t *binval, uint8_t bcdlen, uint8_t binlen) __reentrant
+{
+	(void)binval;
+	(void)bcdval;
+	(void)binlen;
+	(void)bcdlen;
+
+	__asm
+	mov	a,_bp
+	add	a,#0xfd
+	mov	r0,a
+	mov	a,@r0		; binval
+	mov	r1,a		
+	dec	r0
+	mov	a,@r0		; bcdlen
+	mov	r7,a
+	dec	r0		
+	mov	a,@r0		; binlen
+	mov	r6,a
+	mov	r0,dpl		; bcdval
+	lcall	bcd_tolong
+			
+	__endasm;
+}
+
+
+

bcd_tolong__.c

@@ -0,0 +1,67 @@
+#include "usebank0.h"
+/*
+r0 = bcd
+r1 = bin
+r7 = len of bcd
+r6 = len of bin
+
+
+reverse double dabble
+*/
+ 
+static void bcd_tolong__() __naked
+{
+
+	__asm
+
+	.globl	bcd_tolong
+bcd_tolong:
+	mov	a,AR6		; use r4 as counter
+	mov	b,#0x08
+	mul	ab
+	mov	r4,a
+
+
+000$:
+	push	AR0
+	push	AR7
+	clr	c
+
+	lcall	long_rrc
+	mov	r0,AR1
+	mov	r7,AR6
+
+	lcall	long_rrc
+	pop	AR7
+	pop	AR0
+	push	AR0
+	push 	AR7
+	
+001$:
+	mov	a,@r0
+	acall	003$
+	acall	003$
+	mov	@r0,a
+
+	inc 	r0
+	djnz	r7,001$
+	pop	AR7
+	pop	AR0
+	djnz	r4,000$
+	ret				
+003$:
+	swap	a
+	clr	c
+	subb	a,#0x80
+	jc	002$
+	subb	a,#0x30
+002$:
+	add	a,#0x80
+	ret
+	
+	__endasm;
+
+}
+
+
+

lcd.h

@@ -0,0 +1,120 @@
+#ifndef MC8051FUN_LCD_H_
+#define MC8051FUN_LCD_H
+
+#ifndef LCD_E
+#define LCD_E P3_4
+#endif
+
+#ifndef LCD_RS
+#define LCD_RS P3_5
+#endif
+
+#ifndef LCD_RW
+#define LCD_RW P3_6
+#endif
+
+#ifndef LCD_DATA
+#define LCD_DATA P0
+#endif
+
+#ifndef LCD_READY
+#define LCD_READY P0_7
+#endif
+
+
+ 
+// Clear Display -------------- 0b00000001
+#define LCD_CLEAR_DISPLAY       0x01
+ 
+// Cursor Home ---------------- 0b0000001x
+#define LCD_CURSOR_HOME         0x02
+ 
+// Set Entry Mode ------------- 0b000001xx
+#define LCD_SET_ENTRY           0x04
+ 
+#define LCD_ENTRY_DECREASE      0x00
+#define LCD_ENTRY_INCREASE      0x02
+#define LCD_ENTRY_NOSHIFT       0x00
+#define LCD_ENTRY_SHIFT         0x01
+ 
+// Set Display ---------------- 0b00001xxx
+#define LCD_SET_DISPLAY         0x08
+ 
+#define LCD_DISPLAY_OFF         0x00
+#define LCD_DISPLAY_ON          0x04
+#define LCD_CURSOR_OFF          0x00
+#define LCD_CURSOR_ON           0x02
+#define LCD_BLINKING_OFF        0x00
+#define LCD_BLINKING_ON         0x01
+ 
+// Set Shift ------------------ 0b0001xxxx
+#define LCD_SET_SHIFT           0x10
+ 
+#define LCD_CURSOR_MOVE         0x00
+#define LCD_DISPLAY_SHIFT       0x08
+#define LCD_SHIFT_LEFT          0x00
+#define LCD_SHIFT_RIGHT         0x04
+ 
+// Set Function --------------- 0b001xxxxx
+#define LCD_SET_FUNCTION        0x20
+ 
+#define LCD_FUNCTION_4BIT       0x00
+#define LCD_FUNCTION_8BIT       0x10
+#define LCD_FUNCTION_1LINE      0x00
+#define LCD_FUNCTION_2LINE      0x08
+#define LCD_FUNCTION_5X7        0x00
+#define LCD_FUNCTION_5X10       0x04
+ 
+#define LCD_SOFT_RESET          0x30
+ 
+// Set CG RAM Address --------- 0b01xxxxxx  (Character Generator RAM)
+#define LCD_SET_CGADR           0x40
+ 
+#define LCD_GC_CHAR0            0
+#define LCD_GC_CHAR1            1
+#define LCD_GC_CHAR2            2
+#define LCD_GC_CHAR3            3
+#define LCD_GC_CHAR4            4
+#define LCD_GC_CHAR5            5
+#define LCD_GC_CHAR6            6
+#define LCD_GC_CHAR7            7
+ 
+// Set DD RAM Address --------- 0b1xxxxxxx  (Display Data RAM)
+#define LCD_SET_DDADR           0x80
+
+
+#define LCD_GOTO_HOME		LCD_SET_DDADR
+#define LCD_GOTO_LINE1		LCD_GOTO_HOME
+#define LCD_GOTO_LINE2		LCD_SET_DDADR+0x40
+
+
+#define lcd_wait_ready()\
+	LCD_E=1;	\
+	LCD_RS=0;	\
+	LCD_RW=1; 	\
+	LCD_DATA=0x80;	\
+	while((LCD_DATA & 0x80))	\
+	{				\
+		LCD_E=0;		\
+		LCD_E=1;		\
+	}				\
+	LCD_E=1;			\
+	LCD_RW=0;		
+
+
+
+#define lcd_cmd(c) \
+	lcd_wait_ready(); \
+	LCD_RS=0;	\
+	LCD_DATA=c;	\
+	LCD_E=0
+
+#define lcd_chr(c)	\
+	lcd_wait_ready(); \
+	LCD_RS=1;	\
+	LCD_DATA=c;	\
+	LCD_E=0
+
+
+
+#endif

long_1cpl__.c

@@ -0,0 +1,22 @@
+
+#include "mc8051fun.h"
+
+static void long_1cpl__() __naked
+{
+	__asm
+	.globl	long_1cpl
+
+long_1cpl:
+
+	clr	c
+001$:	
+	mov	a,#0xff
+	subb	a,@r0
+	mov	@r0,a
+	inc	r0
+	djnz	r7,001$
+	ret
+
+	__endasm;	
+}
+

long_add.c

@@ -0,0 +1,28 @@
+#include  "mc8051fun.h"
+#include "bcd.h"
+
+#pragma disable_warning 59  // Disable "must return a value" warning
+
+uint8_t long_add(__idata uint8_t *v1, __idata uint8_t *v2,uint8_t len) __reentrant
+{
+	(void)v1; (void)v2; (void)len;
+	__asm
+	mov	a,_bp
+	add	a,#0xfd
+	mov	r0,a
+	mov	a,@r0		; *v2
+	dec	r0
+	mov	r1,a
+	mov	a,@r0		; len
+	mov	r7,a		
+	mov	r0,dpl
+	lcall	long_invert
+	mov	dpl,#0x00
+	jnc	$002
+	inc	dpl
+$002:
+	__endasm;
+}
+
+
+

long_add__.c

@@ -0,0 +1,27 @@
+/*
+ * @r0 = @r0+@r1
+ * r7=len
+ */
+
+static void long_add__() __naked
+{
+	__asm
+	.globl	long_add
+	.globl	long_addc
+long_add:
+	clr	c
+long_addc:
+001$:		
+	mov	a,@r0
+	addc	a,@r1
+	mov	@r0,a
+	inc	r0
+	inc	r1
+	djnz	r7,001$
+	ret
+
+	__endasm;
+}
+
+
+

long_addbyte.c

@@ -0,0 +1,26 @@
+#include "mc8051fun.h"
+
+/**
+ * C wrapper for long_addbyte 
+ */
+
+static void long_addbyte(__idata uint8_t * val, uint8_t len, uint8_t b) __reentrant
+{
+	(void)val;
+	(void)b;
+
+	__asm
+	mov	a,_bp
+	add	a,#0xfd
+	mov	r0,a
+	mov	a,@r0		; len
+	mov	r7,a
+	dec	r0
+	mov	a,@r0		; b
+	mov	r0,dpl
+	lcall	long_addbyte
+			
+	__endasm;
+	
+}
+

long_addbyte__.c

@@ -0,0 +1,23 @@
+/*
+ * a = byte to add
+ * @r0 = long val
+ * r7 = length
+ *
+ */
+static void long_addbyte__() __naked
+{
+	__asm
+	.globl	long_addbyte
+long_addbyte:
+	clr	c
+	ajmp	002$
+001$:
+	mov	a,#0x00
+002$:
+	addc	a,@r0
+	mov	@r0,a
+	inc	r0
+	djnz	r7,001$	
+	ret
+	__endasm;
+}

long_div.c

@@ -0,0 +1,34 @@
+#include  "mc8051fun.h"
+#include "bcd.h"
+
+#pragma disable_warning 59  // Disable "must return a value" warning
+
+
+void long_div(__idata uint8_t *v1, __idata uint8_t *v2, 
+	__idata  uint8_t *result, __idata uint8_t *rest, uint8_t len) __reentrant
+{
+
+	(void)v1; (void)v2; (void)len;
+	(void)result; (void)rest;
+
+	__asm
+	mov	a,_bp
+	add	a,#0xfd
+	mov	r0,a
+	mov	a,@r0		; *v2
+	dec	r0
+	mov	r1,a
+	mov	a,@r0		; *result
+	dec	r0
+	mov	r2,a
+	mov	a,@r0		; *rest
+	dec	r0
+	mov	r3,a	
+	mov	a,@r0		; len
+	mov	r7,a		
+	mov	r0,dpl		; *v1
+	lcall	long_div
+	__endasm;
+
+}
+

long_div__.c

@@ -0,0 +1,67 @@
+#include "mc8051fun.h"
+
+/*
+ * r0 = numerator
+ * r1 = denominator
+ * r2 = quotient (result)
+ * r3 = rest
+ * r7 = length in bytes
+ */
+static void long_div__() __naked
+{
+	__asm
+	.globl long_div
+long_div:
+
+	mov	r5,AR7 	;#0x01
+	push 	AR0
+	mov	r0,AR3
+;	lcall	long_xset_zero
+	pop	AR0
+
+
+	mov 	r4,AR1
+	mov	a,r0
+	add	a,r5 ;#DIGITS-1
+	mov	r0,a
+003$:
+	mov	a,@r0
+	mov	r6,#8
+002$:
+	rlc	a
+	push 	ACC
+	push	AR0
+
+	mov	r0,AR3 ;#_rest
+	mov 	r7,AR5	;#DIGITS
+	lcall	long_rlc
+
+	mov 	r0,AR3 ;#_rest 
+	mov	r7,AR5	;#DIGITS
+	push 	AR1
+	lcall	long_sub
+	pop	AR1
+
+	jnc	001$
+	mov 	r0,AR3 ;#_rest
+	mov	r7,AR5	;#DIGITS
+	push	AR1
+	lcall	long_add
+	pop	AR1
+	setb	c
+001$:	
+	cpl	c
+	mov	r0,AR2 ; #_result
+	mov	r7,AR5	;#DIGITS
+	lcall	long_rlc
+
+	pop	AR0
+	pop	ACC
+	djnz	r6,002$
+	djnz	r0,003$
+	ret
+
+	__endasm;
+}
+
+

long_fill__.c

@@ -0,0 +1,19 @@
+
+
+void long_fill() __naked
+{
+	__asm
+	.globl long_fill_zero
+	.globl long_fill
+
+long_fill_zero:		
+	mov	a,#0x00
+long_fill:		
+	mov	@r0,a
+	inc	r0
+	djnz	r7,long_fill
+	ret
+	__endasm;
+}
+
+

long_invert.c

@@ -0,0 +1,21 @@
+#include "mc8051fun.h"
+
+void long_invert(__idata uint8_t *val, uint8_t len) __reentrant
+{
+	(void)val;
+	(void)len;
+
+	__asm
+
+	mov	a,_bp
+	add	a,#0xfd
+	mov	r0,a
+	mov	a,@r0		; len
+	mov	r7,a		
+	mov	r0,dpl
+	lcall	long_invert
+	__endasm;
+
+
+}
+

long_invert__.c

@@ -0,0 +1,22 @@
+#include "mc8051fun.h"
+
+static void long_invert__() __naked
+{
+	__asm
+
+	.globl	long_invert
+long_invert:
+	push 	AR0
+	push	AR7
+
+	lcall	long_1cpl
+
+	pop	AR7
+	pop	AR0
+
+	mov	a,#0x01
+	lcall	long_addbyte
+	ret
+	__endasm;
+
+}

long_mul.c

@@ -0,0 +1,28 @@
+#include "mc8051fun.h"
+
+uint8_t long_mul(__idata uint8_t *v1, __idata uint8_t *v2,uint8_t len, __idata  uint8_t *result) __reentrant
+{
+	(void)v1; (void)v2; (void)len,(void)result;
+	__asm
+	mov	a,_bp
+	add	a,#0xfd
+	mov	r0,a
+	mov	a,@r0		; *v2
+	dec	r0
+	mov	r1,a
+	mov	a,@r0		; len
+	mov	r7,a
+	dec	r0
+	mov	a,@r0		; result
+	mov	r2,a
+	mov	r0,dpl
+	lcall	long_mul
+	mov	dpl,#0x00
+	jnc	$002
+	inc	dpl
+$002:
+	__endasm;
+}
+
+
+

long_mul__.c

@@ -0,0 +1,55 @@
+#include "mc8051fun.h"
+
+/*
+ * val0,val1 = r0,r1
+ * r2 = result
+ * r7 = len of val0,val1
+ */
+void long_mul__()  __naked
+{
+
+	__asm
+	.globl	long_mul
+
+long_mul:
+	push	AR0
+	push 	AR7
+	mov	r0,AR2
+	lcall	long_fill_zero
+	pop	AR7
+	pop	AR0
+	
+	mov	r6,#8
+	mov	a,@r1
+000$:
+	rrc	a
+	jnc	001$
+
+	push	ACC
+	push	AR0
+	push	AR1
+	push	AR7
+	mov	r1,AR0
+	mov	r0,AR2
+	lcall	long_add
+	pop	AR7
+	pop	AR1
+	pop	AR0
+	pop	ACC	
+
+001$:
+	push	ACC
+	push	AR7
+	push	AR0
+	clr	c
+	lcall	long_rlc
+	pop	AR0
+	pop	AR7
+	pop	ACC
+
+	djnz	r6,000$
+	ret	
+	__endasm;
+}
+
+

long_rlc__.c

@@ -0,0 +1,24 @@
+
+/*
+ * @r0 = number
+ * r7 = len
+ *
+ * modyfies: r0,r7,a 
+ */
+static void long_rlc__() __naked
+{
+	__asm
+	.globl long_rlc
+
+long_rlc:
+	mov	a,@r0
+	rlc	a
+	mov	@r0,a
+	inc	r0
+	djnz	r7,long_rlc
+	ret
+
+	__endasm;
+}
+
+

long_rrc__.c

@@ -0,0 +1,29 @@
+
+/*
+ * @r0 = number
+ * r7 = len
+ *
+ * modyfies: r0,r7,a 
+ */
+static void long_rrc__() __naked
+{
+	__asm
+	.globl long_rrc
+long_rrc:
+	push	PSW
+	mov	a,r0
+	add	a,r7
+	mov	r0,a
+	pop	PSW
+001$:
+	dec	r0
+	mov	a,@r0
+	rrc	a
+	mov	@r0,a
+	djnz	r7,001$
+	ret
+
+	__endasm;
+}
+
+

long_sub__.c

@@ -0,0 +1,25 @@
+
+/**
+ * @r0=@r0-@r1
+ * r7=len
+ */
+static void long_sub() __naked
+{
+	__asm
+	.globl long_sub
+	.globl long_subb
+long_sub:
+	clr	c
+long_subb:
+	mov	a,@r0
+	subb	a,@r1
+	mov	@r0,a
+	inc	r0
+	inc	r1
+	djnz	r7,long_xsubb
+	ret
+
+	__endasm;
+}
+
+

long_tobcd.c

@@ -0,0 +1,33 @@
+
+#include "mc8051fun.h"
+
+/*
+ * C-Wrapper for long_tobcd
+ */
+
+void long_tobcd(__idata uint8_t *binval, __idata uint8_t *bcdval, uint8_t binlen, uint8_t bcdlen) __reentrant
+{
+	(void)binval;
+	(void)bcdval;
+	(void)binlen;
+	(void)bcdlen;
+
+	__asm
+	mov	a,_bp
+	add	a,#0xfd
+	mov	r0,a
+	mov	a,@r0
+	mov	r1,a
+	dec	r0
+	mov	a,@r0
+	mov	r7,a
+	dec	r0
+	mov	a,@r0
+	mov	r6,a
+	mov	r0,dpl
+	lcall	long_tobcd
+			
+	__endasm;
+}
+
+

long_tobcd__.c

@@ -0,0 +1,92 @@
+
+/*
+r0 = bin
+r1 = bcd
+r7 = len of bin
+r6 = len of bcd
+*/
+
+#include "mc8051fun.h"
+
+#include "usebank0.h"
+
+// double dabble
+
+void long_tobcd__()  __naked
+{
+	__asm
+	.globl long_tobcd
+	
+long_tobcd:
+
+	; fill dst with zeroes
+
+	mov	r3,AR1		; save r1 in r3
+	mov	r4,AR6		; use r4 as counter
+;	mov	a,#0x00
+
+000$:
+	mov	@r1,#0x0 
+	inc	r1
+	djnz	r4,000$
+
+
+
+	mov	a,r0
+	add	a,r7
+	dec	a
+	mov	r0,a		; r0 points to last byte of bin
+	mov	r2,AR0		; save r0 in r2	
+
+006$:	
+	mov 	a,@r0
+	mov	r5,#0x08
+005$:
+	mov	r4,AR6		; use r4 as counter
+	mov	r1,AR3
+
+	push 	ACC
+004$:
+	mov	a,@r1
+	acall	003$
+	acall	003$
+	mov	@r1,a
+	inc	r1
+	djnz	r4,004$
+
+	pop	ACC
+
+
+	rlc	a
+	push 	ACC
+	push	AR0
+	push	AR7
+	mov	r7,AR6
+	mov	r0,AR3
+	lcall	long_rlc
+	pop 	AR7
+	pop	AR0
+	pop	ACC
+	djnz	r5,005$
+
+
+	dec	r0
+	djnz	r7,006$
+	ret
+	
+
+003$:
+	swap	a
+	clr	c
+	subb	a,#0x50
+	jc	002$
+	add	a,#0x30
+002$:
+	add	a,#0x50
+	ret
+	
+__endasm;
+}
+
+
+

long_xadd.c

@@ -0,0 +1,32 @@
+
+/**
+ * Add two longs in xmem zero page
+ *
+ * r0 = ptr to firts arg
+ * r1 = ptr to second arg
+ * r7 = length
+ *
+ * result is in r0*
+ */
+
+void long_xadd() __naked
+{
+	__asm
+	.globl long_xadd
+	.globl long_xaddc
+long_xadd:
+	clr	c
+long_xaddc:
+	movx	a,@r1
+	mov	b,a
+	movx	a,@r0
+	addc	a,b
+	movx	@r0,a
+	inc	r0
+	inc	r1
+	djnz	r7,long_xaddc
+	ret
+	__endasm;
+}
+
+

long_xcpy.c

@@ -0,0 +1,18 @@
+
+
+
+void long_xcpy() __naked
+{
+	__asm
+	.globl long_xcpy
+long_xcpy:
+	movx	a,@r1
+	movx	@r0,a
+	inc	r0
+	inc	r1
+	djnz	r7,long_xcpy
+	ret
+	__endasm;
+}
+
+

long_xdiv.c

@@ -0,0 +1,69 @@
+#include "mc8051fun.h"
+
+/*
+ * r0 = numerator
+ * r1 = denominator
+ * r2 = quotient (result)
+ * r3 = rest
+ * r7 = length in bytes
+ */
+void long_xdiv() __naked
+{
+	__asm
+	.globl long_xdiv
+long_xdiv:
+
+	mov	r5,AR7 	;#0x01
+	push 	AR0
+	mov	r0,AR3
+	lcall	long_xset_zero
+	pop	AR0
+
+	mov 	r4,AR1
+	clr 	c
+	mov	a,r0
+	addc	a,r5 ;#DIGITS-1
+	mov	r0,a
+003$:
+	movx	a,@r0
+	mov	r6,#8
+002$:
+	rlc	a
+	push 	ACC
+	push	AR0
+
+	mov	r0,AR3 ;#_rest
+	mov 	r7,AR5	;#DIGITS
+	lcall	long_xrlc
+
+	mov 	r0,AR3 ;#_rest 
+;	mov 	r1,#_val1
+	mov	r7,AR5	;#DIGITS
+	push 	AR1
+	lcall	long_xsub
+	pop	AR1
+
+	jnc	001$
+	mov 	r0,AR3 ;#_rest
+;	mov 	r1,#_val1
+	mov	r7,AR5	;#DIGITS
+	push	AR1
+	lcall	long_xadd
+	pop	AR1
+	setb	c
+001$:	
+	cpl	c
+	mov	r0,AR2 ; #_result
+	mov	r7,AR5	;#DIGITS
+	lcall	long_xrlc
+
+	pop	AR0
+	pop	ACC
+	djnz	r6,002$
+	djnz	r0,003$
+	ret
+
+	__endasm;
+}
+
+

long_xrlc.c

@@ -0,0 +1,21 @@
+
+/*
+ * 
+ */
+void long_xrlc() __naked
+{
+	__asm
+	.globl long_xrlc
+
+long_xrlc:
+	movx	a,@r0
+	rlc	a
+	movx	@r0,a
+	inc	r0
+	djnz	r7,long_xrlc
+	ret
+
+	__endasm;
+}
+
+

long_xset.c

@@ -0,0 +1,17 @@
+
+
+void long_xset() __naked
+{
+	__asm
+	.globl long_xset_zero
+	.globl long_xset
+
+long_xset_zero:		
+	mov	a,#0x00
+long_xset:		
+	movx	@r0,a
+	djnz	r7,long_xset
+	__endasm;
+}
+
+

long_xsub.c

@@ -0,0 +1,28 @@
+
+
+/**
+ * @r0=@r0-@r1
+ * r7=len
+ */
+void long_xsub() __naked
+{
+	__asm
+	.globl long_xsub
+	.globl long_xsubb
+long_xsub:
+	clr	c
+long_xsubb:
+	movx	a,@r1
+	mov	b,a
+	movx	a,@r0
+	subb	a,b
+	movx	@r0,a
+	inc	r0
+	inc	r1
+	djnz	r7,long_xsubb
+	ret
+
+	__endasm;
+}
+
+

long_xtobcd.c

@@ -0,0 +1,88 @@
+
+/*
+r0 = bin
+r1 = bcd
+r7 = len of bin
+r6 = len of bcd
+*/
+
+#include "mc8051fun.h"
+
+// double dabble
+
+void long_xtobcd() __naked
+{
+	__asm
+.globl long_xtobcd
+	
+long_xtobcd:
+
+	; fill dst with zeroes
+
+	mov	r3,AR1		; save r1 in r3
+	mov	r4,AR6		; use r4 as counter
+	mov	a,#0x00
+
+000$:
+	movx	@r1,a
+	inc	r1
+	djnz	r4,000$
+
+	mov	a,r0
+	add	a,r7
+	dec	a
+	mov	r0,a
+	mov	r2,AR0		; save r0 in r2	
+
+006$:	
+	movx 	a,@r0
+	mov	r5,#0x08
+005$:
+	mov	r4,AR6		; use r4 as counter
+	mov	r1,AR3
+
+	push 	ACC
+004$:
+	movx	a,@r1
+	acall	003$
+	acall	003$
+	movx	@r1,a
+	inc	r1
+	djnz	r4,004$
+
+	pop	ACC
+
+
+	rlc	a
+	push 	ACC
+	push	AR0
+	push	AR7
+	mov	r7,AR6
+	mov	r0,AR3
+	lcall	long_xrlc
+	pop 	AR7
+	pop	AR0
+	pop	ACC
+	djnz	r5,005$
+
+
+	dec	r0
+	djnz	r7,006$
+	ret
+	
+
+003$:
+	swap	a
+	clr	c
+	subb	a,#0x50
+	jc	002$
+	add	a,#0x30
+002$:
+	add	a,#0x50
+	ret
+	
+__endasm;
+}
+
+
+

mc8051fun.h

@@ -4,6 +4,9 @@
 #include <stdint.h>
 #include <8052.h>
 
+#define STC15XX		1	// STC15xx family
+#define AT89XX		2	// AT89XX family
+#define AT89XX_6T	3	// AT89C89C52 in 6T mode 
 
 
 void uart_send_chr(char tx_data);
@@ -11,9 +14,16 @@ void uart_send_str(const char *str);
 
 void uart_init_(uint8_t timer_init,uint8_t x2);
 
-#define uart_init(baud,x2) \
+#define uart_init_8051(baud,x2) \
+	uart_init_(256L-FOSC/12L/(baud*32L/(1<<x2)),x2)
+#define uart_init_at89xx_6t_(baud,x2) \
 	uart_init_(256L-FOSC/12L/(baud*16L/(1<<x2)),x2)
 
+#if MCU==AT89XX_6T 
+	#define uart_init(baud,x2) uart_init_at89xx_6t_(baud,x2)
+#else
+	#define uart_init(baud,x2) uart_init_8051(baud,x2)
+#endif
 
 #define setbits(var,bits) (var|=bits)
 #define unsetbits(var,bits) (var&=(bits^0xff))
@@ -35,9 +45,6 @@ extern uint8_t sevenseg_dec_inv[10];
 #define at89xx_6t_timer8_init_val(freq) ((256L)-FOSC/6L/freq)
 
 
-#define STC15XX		1	// STC15xx family
-#define AT89XX		2	// AT89XX family
-#define AT89XX_6T	3	// AT89C89C52 in 6T mode 
 	
 #if MCU==AT89XX_6T 
 #define timer8_init_val(freq) at89xx_6t_timer8_init_val(freq) 
@@ -68,12 +75,23 @@ int getpin(i8051pin_T *pin);
 void setpin(i8051pin_T *pin, uint8_t val);
 uint8_t getport(int n);
 
+#define AR0 0x00
+#define AR1 0x01
+#define AR2 0x02
+#define AR3 0x03
+#define AR4 0x04
+#define AR5 0x05
+#define AR6 0x06
+#define AR7 0x07
 
 
 
+uint8_t multest(uint8_t a, uint8_t b);
 
-
-
+void bcd_tolong(__idata uint8_t *bcdval, __idata uint8_t *binval, uint8_t bcdlen, uint8_t binlen) __reentrant;
+void long_invert(__idata uint8_t *val, uint8_t len) __reentrant;
+uint8_t long_add(__idata uint8_t *v1, __idata uint8_t *v2,uint8_t len) __reentrant;
+uint8_t long_mul(__idata uint8_t *v1, __idata uint8_t *v2,uint8_t len, __idata  uint8_t *result) __reentrant;
 
 
 #endif

multest.c

@@ -0,0 +1,8 @@
+
+
+#include "mc8051fun.h"
+
+uint8_t multest(uint8_t a, uint8_t b)
+{
+	return a*b;
+}

usebank0.h

@@ -0,0 +1,21 @@
+
+#undef AR0
+#undef AR1
+#undef AR2
+#undef AR3
+#undef AR4
+#undef AR5
+#undef AR6
+#undef AR7
+
+
+#define AR0 0x00
+#define AR1 0x01
+#define AR2 0x02
+#define AR3 0x03
+#define AR4 0x04
+#define AR5 0x05
+#define AR6 0x06
+#define AR7 0x07
+
+