printer.v: allow C3# (OUT 4) to clear the input FIFO

Implement a flash clear command; it's easy enough to do.

1 files changed, 2 insertions, 1 deletions

diff --git a/printer.v b/printer.v
index dcd77d1..8a3053c 100644
--- a/printer.v
+++ b/printer.v
@@ -22,6 +22,7 @@
 //
 // - ABC-bus select code 60 decimal;
 //   OUT 0 - (OUT)  output data
+//   OUT 4 - (C3)   reset input FIFO
 //   IN  0 - (INP)  input data
 //   INP 1 - (STAT) bit 5 - Tx busy
 //                  bit 6 - Rx available
@@ -235,7 +236,7 @@ module printer (
 			.clock (clk),
 			.data (rx_data[7:0]),
 			.wrreq (rx_write_stb),
-			.sclr (~reset_n),
+			.sclr (~reset_n | (selected & ~abc_c3_n)),
 			.almost_full (tty_rts),
 			.empty (rx_empty),
 			.full ( ),