bulk lines draw

format

@@ -45,0 +77,4 @@
+    }
+
+    while (__shell_ring_free() < total)          // back off until there is room
+        _ksys_delay(1);

@@ -45,0 +82,4 @@
+    wp = h->write_ptr;
+
+    ring[wp] = cmd;                 wp++; if (wp == SHELL_RING_SIZE) wp = 0;
+    ring[wp] = (unsigned char)(len & 0xff);        wp++; if (wp == SHELL_RING_SIZE) wp = 0;

@@ -78,1 +99,3 @@
-                free(buf1k);
+            command = ring[rp];  rp++;  if (rp == ring_size) rp = 0;
+
+            len  =            ring[rp];  rp++;  if (rp == ring_size) rp = 0;

@@ -79,0 +105,4 @@
+                len = ring_size - 1;
+
+            for (j = 0; j < len; j++) {
+                frame[j] = ring[rp];  rp++;  if (rp == ring_size) rp = 0;

@@ -36,0 +42,4 @@
+	}
+
+	while (sc_ring_free() < total)
+		kol_sleep(1);

@@ -36,0 +47,4 @@
+	wp = h->write_ptr;
+
+	ring[wp] = cmd;                                wp++; if (wp == ring_size) wp = 0;
+	ring[wp] = (unsigned char)(len & 0xff);        wp++; if (wp == ring_size) wp = 0;