diff --git a/Binary/RCZ80_std.upd b/Binary/RCZ80_std.upd
deleted file mode 100644
index 2890b61d..00000000
Binary files a/Binary/RCZ80_std.upd and /dev/null differ
diff --git a/Binary/SBC_std.upd b/Binary/SBC_std.upd
deleted file mode 100644
index 2b85c08e..00000000
Binary files a/Binary/SBC_std.upd and /dev/null differ
diff --git a/Source/Apps/Build.cmd b/Source/Apps/Build.cmd
index ac3ed35c..ee85be71 100644
--- a/Source/Apps/Build.cmd
+++ b/Source/Apps/Build.cmd
@@ -20,7 +20,6 @@ call :asm mode || goto :eof
 call :asm rtc || goto :eof
 call :asm timer || goto :eof
 call :asm180 inttest || goto :eof
-call :asm rtcds7 || goto :eof
 call :asm rtchb || goto :eof
 call :asm ppidetst || goto :eof
 call :asm tstdskng || goto :eof
@@ -34,6 +33,7 @@ setlocal & cd XM && call Build || exit /b 1 & endlocal
 setlocal & cd FDU && call Build || exit /b 1 & endlocal
 setlocal & cd Tune && call Build || exit /b 1 & endlocal
 setlocal & cd FAT && call Build || exit /b 1 & endlocal
+setlocal & cd I2C && call Build || exit /b 1 & endlocal
 
 copy *.com %APPBIN%\
 
diff --git a/Source/Apps/I2C/Makefile b/Source/Apps/I2C/Makefile
index 8cc30294..cdee4fdd 100644
--- a/Source/Apps/I2C/Makefile
+++ b/Source/Apps/I2C/Makefile
@@ -1,12 +1,21 @@
-OBJECTS = I2CSCAN.COM 
+OBJECTS = i2cscan.com, rtcds7.com, i2clcd.com
 DEST = ../../../Binary/Apps
 TOOLS = ../../../Tools
 
 include $(TOOLS)/Makefile.inc
 
-DEPS := I2CSCAN.ASM $(shell find . -name '*.inc')
+DEPS1 := i2cscan.asm $(shell find . -name '*.inc')
+DEPS2 := rtcds7.asm $(shell find . -name '*.inc')
+DEPS3 := i2clcd.asm $(shell find . -name '*.inc')
 
-I2CSCAN.COM: $(DEPS)
-	$(TASM) -dWBW I2CSCAN.ASM I2CSCAN.COM I2CSCAN.LST
+
+i2cscan.com: $(DEPS1)
+	$(TASM) -dWBW i2cscan.asm i2cscan.com i2cscan.lst
+
+rtcds7.com: $(DEPS2)
+	$(TASM) -dWBW rtcds7.asm rtcds7.com rtcds7.lst
+
+i2clcd.com: $(DEPS3)
+	$(TASM) -dWBW i2clcd.asm i2clcd.com i2clcd.lst
 
 
diff --git a/Source/Apps/I2C/I2CSCAN.ASM b/Source/Apps/I2C/i2cscan.asm
similarity index 100%
rename from Source/Apps/I2C/I2CSCAN.ASM
rename to Source/Apps/I2C/i2cscan.asm
diff --git a/Source/Apps/I2C/pcfi2c.inc b/Source/Apps/I2C/pcfi2c.inc
new file mode 100644
index 00000000..c61dcb59
--- /dev/null
+++ b/Source/Apps/I2C/pcfi2c.inc
@@ -0,0 +1,116 @@
+;==================================================================================================
+; PCF8584 Generic 
+;==================================================================================================
+;
+PCF_BASE  	.EQU  0F0H
+PCF_ID   	.EQU  0AAH
+CPU_CLK	  	.EQU  12
+
+PCF_RS0     	.EQU  PCF_BASE
+PCF_RS1    	.EQU  PCF_RS0+1
+PCF_OWN	 	.EQU  (PCF_ID >> 1)        	; PCF'S ADDRESS IN SLAVE MODE
+
+REGS0     	.EQU  PCF_BASE
+REGS1    	.EQU  REGS0+1
+;
+;T4LC512D	.EQU	10100000B		; DEVICE IDENTIFIER
+;T4LC512A1	.EQU	00000000B		; DEVICE ADDRESS
+;T4LC512A2	.EQU	00001110B		; DEVICE ADDRESS
+;T4LC512A3	.EQU	00000010B		; DEVICE ADDRESS
+;T4LC512W	.EQU	00000000B		; DEVICE WRITE
+;T4LC512R	.EQU	00000001B		; DEVICE READ
+;
+;I2CDEV1W  	.EQU	(T4LC512D+T4LC512A1+T4LC512W)
+;I2CDEV1R	.EQU	(T4LC512D+T4LC512A1+T4LC512R)
+;
+;I2CDEV2W  	.EQU	(T4LC512D+T4LC512A2+T4LC512W)
+;I2CDEV2R	.EQU	(T4LC512D+T4LC512A2+T4LC512R)
+;
+;I2CDEV3W  	.EQU	(T4LC512D+T4LC512A3+T4LC512W)
+;I2CDEV3R	.EQU	(T4LC512D+T4LC512A3+T4LC512R)
+;
+; CONTROL REGISTER BITS
+;
+PCF_PIN  	.EQU  10000000B
+PCF_ES0  	.EQU  01000000B
+PCF_ES1  	.EQU  00100000B
+PCF_ES2  	.EQU  00010000B
+PCF_EN1  	.EQU  00001000B
+PCF_STA  	.EQU  00000100B
+PCF_STO  	.EQU  00000010B
+PCF_ACK  	.EQU  00000001B
+;
+PCF_START_    	.EQU  (PCF_PIN | PCF_ES0 | PCF_STA | PCF_ACK)
+PCF_STOP_     	.EQU  (PCF_PIN | PCF_ES0 | PCF_STO | PCF_ACK)
+PCF_REPSTART_ 	.EQU  (          PCF_ES0 | PCF_STA | PCF_ACK)
+PCF_IDLE_     	.EQU  (PCF_PIN | PCF_ES0           | PCF_ACK)
+;
+; STATUS REGISTER BITS
+;
+;PCF_PIN  	.EQU  10000000B
+PCF_INI   	.EQU  01000000B   ; 1 if not initialized 
+PCF_STS   	.EQU  00100000B
+PCF_BER   	.EQU  00010000B
+PCF_AD0   	.EQU  00001000B
+PCF_LRB   	.EQU  00001000B
+PCF_AAS   	.EQU  00000100B
+PCF_LAB   	.EQU  00000010B
+PCF_BB    	.EQU  00000001B
+;
+; CLOCK CHIP FREQUENCIES
+;
+PCF_CLK3   	.EQU	000H
+PCF_CLK443 	.EQU	010H
+PCF_CLK6   	.EQU	014H
+PCF_CLK8   	.EQU	018H
+PCF_CLK12  	.EQU	01cH
+;
+; TRANSMISSION FREQUENCIES
+;
+PCF_TRNS90 	.EQU	000H	;  90 kHz */
+PCF_TRNS45 	.EQU	001H	;  45 kHz */
+PCF_TRNS11 	.EQU	002H	;  11 kHz */
+PCF_TRNS15 	.EQU	003H	; 1.5 kHz */
+;
+; TIMEOUT AND DELAY VALUES (ARBITRARY)
+;
+PCF_PINTO	.EQU	65000
+PCF_ACKTO	.EQU	65000
+PCF_BBTO	.EQU	65000
+PCF_LABDLY	.EQU	65000
+;
+; DATA PORT REGISTERS
+;
+#IF (CPU_CLK = 443)
+PCF_CLK .EQU PCF_CLK443
+#ELSE 
+ #IF (CPU_CLK = 8)
+PCF_CLK .EQU PCF_CLK8
+ #ELSE 
+  #IF (CPU_CLK = 12)
+PCF_CLK .EQU PCF_CLK12
+  #ELSE ***ERROR
+  #ENDIF
+ #ENDIF	
+#ENDIF
+;
+DS7_OUT		.EQU	10000000B		; SELECT SQUARE WAVE FUNCTION
+DS7_SQWE	.EQU	00010000B		; ENABLE SQUARE WAVE OUTPUT
+DS7_RATE	.EQU	00000000B		; SET 1HZ OUPUT
+;
+DS7_DS1307    	.EQU  	11010000B   		; DEVICE IDENTIFIER
+DS7_W   	.EQU  	00000000B   		; DEVICE WRITE
+DS7_R   	.EQU  	00000001B   		; DEVICE READ
+;
+DS7_READ   	.EQU    (DS7_DS1307 | DS7_R)	; READ
+DS7_WRITE 	.EQU    (DS7_DS1307 | DS7_W)	; WRITE
+;
+DS7_CTL		.EQU	(DS7_OUT | DS7_SQWE | DS7_RATE)
+;
+PCF8574   	.EQU 	01000000B    		; DEVICE IDENTIFIER
+PCF8574A  	.EQU 	00001110B    		; DEVICE ADDRESS
+PCF8574W  	.EQU 	00000000B    		; DEVICE WRITE 
+PCF8574R  	.EQU 	00000001B    		; DEVICE READ
+;	
+I2CLCDR  	.EQU  (PCF8574+PCF8574A+PCF8574R)
+I2CLCDW  	.EQU  (PCF8574+PCF8574A+PCF8574W) 
diff --git a/Source/Apps/I2C/RTCds7.asm b/Source/Apps/I2C/rtcds7.asm
similarity index 100%
rename from Source/Apps/I2C/RTCds7.asm
rename to Source/Apps/I2C/rtcds7.asm
diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index 369708b9..92a29c8a 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -2367,6 +2367,9 @@ HB_INITTBL:
 ;#IF (DSKYENABLE)
 ;	.DW	DSKY_INIT
 ;#ENDIF
+#IF (DMAENABLE)
+	.DW	DMA_INIT
+#ENDIF
 #IF (MDENABLE)
 	.DW	MD_INIT
 #ENDIF
@@ -4674,6 +4677,15 @@ SIZ_NEC	.EQU	$ - ORG_NEC
 		.ECHO	" bytes.\n"
 #ENDIF
 ;
+#IF (DMAENABLE)
+ORG_DMA	.EQU	$
+#INCLUDE "dma.asm"
+SIZ_DMA	.EQU	$ - ORG_DMA
+		.ECHO	"DMA occupies "
+		.ECHO	SIZ_DMA
+		.ECHO	" bytes.\n"
+#ENDIF
+;
 ; FONTS AREA
 ;
 ORG_FONTS	.EQU	$