X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=simavr%2Fsim%2Fsim_io.c;h=7edb7865580a9a3bdca7b0978e6f6437b5445382;hb=58506fe0240ff2902e9fb740cab6df80e1436baa;hp=2fa455be6dc214a14009c93ece3747f47982e155;hpb=82f36e2c5b3436a12499b7d8ca3b09f0e0ab1b85;p=simavr

diff --git a/simavr/sim/sim_io.c b/simavr/sim/sim_io.c
index 2fa455b..7edb786 100644
--- a/simavr/sim/sim_io.c
+++ b/simavr/sim/sim_io.c
@@ -99,6 +99,12 @@ avr_register_io_write(
 {
 	avr_io_addr_t a = AVR_DATA_TO_IO(addr);
 
+	if (a >= MAX_IOs) {
+		fprintf(stderr,
+				"Error: avr_register_io_write(): IO address 0x%04x out of range (max 0x%04x).\n",
+					a, MAX_IOs);
+		abort();
+	}
 	/*
 	 * Verifying that some other piece of code is not installed to watch write
 	 * on this address. If there is, this code installs a "dispatcher" callback