--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rvinterf/old/before-rvinterf/txpkt.h	Sat Jun 11 00:13:35 2016 +0000
@@ -0,0 +1,15 @@
+/*
+ * For sizing our buffers etc in rvinterf, we need a limit on the size of
+ * message packets we can send to the target.  As it happens, the packet
+ * Rx code in RVT on the target side also has a limit (quite naturally,
+ * as it needs to use a static buffer to reassemble incoming packets as
+ * they arrive at the UART in unpredictable interrupt-sized chunks), so
+ * we set our limit to match that in RVT.
+ */
+
+#define	MAX_PKT_TO_TARGET	255
+
+/*
+ * The above limit definition counts all bytes between the opening and
+ * closing STX flags, but not DLEs inserted for binary transparency.
+ */