z80pack: add the outgoing port as another tty

diff --git a/Kernel/dev/z80pack/devtty.c b/Kernel/dev/z80pack/devtty.c
index eac9dbc..ec66a44 100644 (file)
--- a/Kernel/dev/z80pack/devtty.c
+++ b/Kernel/dev/z80pack/devtty.c
@@ -11,16 +11,20 @@ __sfr __at 40 tty2stat;
 __sfr __at 41 tty2data;
 __sfr __at 42 tty3stat;
 __sfr __at 43 tty3data;
+__sfr __at 50 tty4stat;
+__sfr __at 51 tty4data;
 
 char tbuf1[TTYSIZ];
 char tbuf2[TTYSIZ];
 char tbuf3[TTYSIZ];
+char tbuf4[TTYSIZ];
 
 struct  s_queue  ttyinq[NUM_DEV_TTY+1] = {       /* ttyinq[0] is never used */
     {   NULL,    NULL,    NULL,    0,        0,       0    },
     {   tbuf1,   tbuf1,   tbuf1,   TTYSIZ,   0,   TTYSIZ/2 },
     {   tbuf2,   tbuf2,   tbuf2,   TTYSIZ,   0,   TTYSIZ/2 },
-    {   tbuf3,   tbuf3,   tbuf3,   TTYSIZ,   0,   TTYSIZ/2 }
+    {   tbuf3,   tbuf3,   tbuf3,   TTYSIZ,   0,   TTYSIZ/2 },
+    {   tbuf4,   tbuf4,   tbuf4,   TTYSIZ,   0,   TTYSIZ/2 }
 };
 
 static uint8_t ttypoll;
@@ -53,8 +57,10 @@ void tty_putc(uint8_t minor, unsigned char c)
         tty1data = c;
     else if (minor == 2)
         tty2data = c;
-    else
+    else if (minor == 3)
         tty3data = c;
+    else
+        tty4data = c;
 }
 
 void tty_sleeping(uint8_t minor)
@@ -78,6 +84,10 @@ void tty_pollirq(void)
         c = tty3data;
         tty_inproc(3, c);
     }
+    while(tty4stat & 1) {
+        c = tty4data;
+        tty_inproc(3, c);
+    }
     if ((ttypoll & 4) && (tty2stat & 2)) {
         ttypoll &= ~4;
         wakeup(&ttydata[2]);
@@ -86,6 +96,10 @@ void tty_pollirq(void)
         ttypoll &= ~8;
         wakeup(&ttydata[3]);
     }
+    if ((ttypoll & 8) && (tty4stat & 2)) {
+        ttypoll &= ~8;
+        wakeup(&ttydata[4]);
+    }
 }    
 
 void tty_setup(uint8_t minor)