diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..09af0a0
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "mc8051fun"]
+	path = mc8051fun
+	url = https://git.planix.org/7u83/mc8051fun.git
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..00d9fa5
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,57 @@
+SDCC ?= sdcc
+SDAR ?= sdar
+STCCODESIZE ?= 8192
+SDCCOPTS ?= 
+SDCCREV ?= -Dstc15f204ea
+STCGAL ?= stcgal 
+#/stcgal.py
+STCGALOPTS ?= 
+STCGALPORT ?= /dev/ttyUSB0
+STCGALPROT ?= auto
+FLASHFILE ?= main.ihx
+
+
+SYSCLK ?= 11059
+FOSC ?=11059200L
+CFLAGS ?= 
+
+LIBSRC = 
+
+LIBNAME = mc8051fun/mc8051fun.lib
+
+PRGSRC = term.c  pinsh.c
+
+PRGOBJ =$(patsubst %.c,%.rel, $(PRGSRC))
+
+
+$(FLASHFILE): $(LIBNAME) $(PRGOBJ)
+	$(SDCC) -o $(FLASHFILE) $(SDCCOPTS) $(SDCCREV) $(CFLAGS) $(PRGOBJ) $(LIBNAME)
+
+
+$(LIBNAME): $(LIBOBJ)
+	$(SDAR) -rc $(LIBNAME) $(LIBOBJ)
+#all: 
+#	make uart2.ihx
+
+%.rel: %.c
+	$(SDCC) $(SDCCOPTS) $(SDCCREV) -DFOSC=$(FOSC) -o $@ -c $<
+
+eeprom:
+	sed -ne '/:..1/ { s/1/0/2; p }' main.hex > eeprom.hex
+
+flash: $(FLASHFILE)
+	$(STCGAL) -p $(STCGALPORT) -P $(STCGALPROT) -t $(SYSCLK) $(STCGALOPTS) $(FLASHFILE)
+
+clean:
+	rm -f *.ihx *.hex *.bin *.rst
+	rm -f *.map
+	rm -f *.rel
+	rm -f *.lst
+	rm -f *.sym
+	rm -f *.asm
+	rm -f *.lk
+	rm -f *.mem
+	rm -f *.lib
+
+cpp: SDCCOPTS+=-E
+cpp: main
diff --git a/mc8051fun b/mc8051fun
new file mode 160000
index 0000000..5c00e16
--- /dev/null
+++ b/mc8051fun
@@ -0,0 +1 @@
+Subproject commit 5c00e1633a9c10cd45a5fa0d0c4dac28ded394c8
diff --git a/pinsh.c b/pinsh.c
new file mode 100644
index 0000000..220936a
--- /dev/null
+++ b/pinsh.c
@@ -0,0 +1,166 @@
+#include "mc8051fun/mc8051fun.h"
+#include "pinsh.h"
+
+void (*pinsh_output_chr)(char);
+uint8_t pinsh_buf[PINSH_BUF_SIZE];
+volatile int pinsh_buf_pos=0;
+
+
+void pinsh_irq_handler()
+{
+	if (RI) {
+		unsigned char b = SBUF;
+		if (b=='\r'){
+			//pinsh_go=1;
+			pinsh_exec(pinsh_buf);
+		} else {
+			SBUF=b;
+			if (pinsh_buf_pos < PINSH_BUF_SIZE-1){
+				pinsh_buf[pinsh_buf_pos++]=b;
+				pinsh_buf[pinsh_buf_pos]=0;
+			}
+
+		}
+		RI=0;
+
+	}
+
+}
+
+static void pinsh_output(const char *str)
+{
+	while(*str)
+		pinsh_output_chr(*str++);
+}
+
+void pinsh_welcome_msg()
+{
+	pinsh_output("Pinsh 8051, V1.0\r\n");
+}
+
+static void show_port(int n)
+{
+	pinsh_output("P");
+	uint8_t b = getport(n);
+	pinsh_output_chr(n+0x30);
+	pinsh_output("=");
+	for (int i=0; i<8; i++) {
+		if (b&(1<<(7-i)))
+			pinsh_output("1");
+		else
+			pinsh_output("0");
+	}
+	pinsh_output("\r\n");
+}
+
+
+
+
+static void show_stat()
+{
+	for (int i=0; i<4; i++)
+		show_port(i);
+
+/*	uint8_t b = P0;
+	show_port("P0",b);
+	b = P1;
+	show_port("P1",b);
+	b = P2;
+	show_port("P2",b);
+	b = P3;
+	show_port("P3",b);
+	*/
+}
+
+static void syntax_error()
+{
+	pinsh_output("Syntax error\r\n");
+
+}
+
+
+static void assign_pin(int n, int p, char val)
+{
+	if (val){
+		switch(n){
+			case 0:
+				P0 |= 1<<p;
+				return;
+			case 1:
+				P1 |= 1<<p;
+				return;
+			case 2:
+				P2 |= 1<<p;
+				return;
+			case 3:
+				P3 |= 1<<p;
+				return;
+		}
+	}	
+	switch(n){
+		case 0:
+			P0 &= (1<<p)^0xff;
+			return;
+		case 1:
+			P1 &= (1<<p)^0xff;
+			return;
+		case 2:
+			P2 &= (1<<p)^0xff;
+			return;
+		case 3:
+			P3 &= (1<<p)^0xff;
+			return;
+	}
+	
+}
+
+static void assign_port(int n, const char*cmd)
+{
+	for (int i=0; i<8 && cmd[i]!=0; i++)
+	{
+		if(cmd[i]!='0' && cmd[i]!='1'){
+			syntax_error();
+			return;
+		}
+	}
+
+	for (int i=0; i<8 && cmd[i]!=0; i++)
+	{
+		assign_pin(n,7-i,cmd[i]-0x30);
+	}
+
+
+}
+
+static void pinsh_exec_p(const char *cmd)
+{
+
+	if (!cmd[0]){
+		show_stat();
+		return;
+	}
+	int n = cmd[0];
+	if(n<0x30 || n>0x33){
+		syntax_error();
+		return;
+	}
+
+	if(cmd[1]==0){
+		show_port(n-0x30);
+		return;
+	}
+
+	if(cmd[1]=='='){
+		assign_port(n-0x30,cmd+2);
+		return;
+	}	
+
+
+
+}
+
+void pinsh_exec(const char *cmd)
+{
+	if(cmd[0]=='p')
+		pinsh_exec_p(cmd+1);
+}
diff --git a/pinsh.h b/pinsh.h
new file mode 100644
index 0000000..abad3d7
--- /dev/null
+++ b/pinsh.h
@@ -0,0 +1,17 @@
+#ifndef PINSH_H_
+#define PINSH_H_
+
+#define PINSH_BUF_SIZE 32
+
+extern void (*pinsh_output_chr)(char);
+
+void pinsh_welcome_msg();
+void pinsh_exec(const char *cmd);
+
+
+extern uint8_t pinsh_buf[PINSH_BUF_SIZE];
+extern volatile int pinsh_buf_pos;
+void pinsh_uart_irq_handler();
+
+
+#endif