amstradnc: static tty buffers and lay framework for cts/rts wakeups

diff --git a/Kernel/platform-amstradnc/devtty.c b/Kernel/platform-amstradnc/devtty.c
index 2e4dda5..33dbe60 100644 (file)
--- a/Kernel/platform-amstradnc/devtty.c
+++ b/Kernel/platform-amstradnc/devtty.c
@@ -43,8 +43,10 @@ uint8_t vtattr_cap;
 struct vt_repeat keyrepeat;
 static uint8_t kbd_timer;
 
-char tbuf1[TTYSIZ];
-char tbuf2[TTYSIZ];
+static uint8_t txwait;
+
+static char tbuf1[TTYSIZ];
+static char tbuf2[TTYSIZ];
 
 struct s_queue ttyinq[NUM_DEV_TTY + 1] = {     /* ttyinq[0] is never used */
        {NULL, NULL, NULL, 0, 0, 0},
@@ -204,7 +206,7 @@ int tty_carrier(uint8_t minor)
 
 void tty_sleeping(uint8_t minor)
 {
-    minor;
+    txwait = 1;
 }
 
 #define SER_INIT       0x4F    /*  1 stop,no parity,8bit,16x */
@@ -365,6 +367,10 @@ void platform_interrupt(void)
                /* work around sdcc bug */
                c = uarta;
                tty_inproc(2, c);
+               if (txwait && (uartb & 1)) {
+                       tty_outproc(2);
+                       txwait = 0;
+               }
        }
        if (!(a & 8)) {
                keyin[0] = kmap0;