add i/o support for memotech.

Author: tschak909

src/memotech/io.c

@@ -1,6 +1,7 @@
 #ifdef __MEMOTECH__
 #include <stdio.h>
 #include <string.h>
+#include <rs232.h>
 #include "../include/io.h"
 #include "../include/protocol.h"
 
@@ -10,14 +11,25 @@ char io_initialized=0;
 
 void io_init(void)
 {
+  rs232_params(RS_BAUD_9600|RS_STOP_1|RS_BITS_8,RS_PAR_NONE);  //  Bauds tested 1200[/] 2400[/] 4800[/] 9600[/] 19200[X] 38400[X] 57600[] 115200[] 
+  rs232_init();
+  io_initialized=1;
 }
 
 void io_send_byte(unsigned char b)
 {
+  if (io_initialized==1)
+    {
+      rs232_put(b);	//*IRQ-OFF (SENDING DATA)
+    }
 }
 
 void io_main(void)
 {
+  if (rs232_get(&inb) != RS_ERR_NO_DATA)  	// *IRQ-OFF (RECEIVING DATA)
+    {	/* [RX - Display] */ 	
+      ShowPLATO(&inb,1);
+    }
 }
 
 #endif /* __MEMOTECH__ */