X-Git-Url: http://cloudbase.mooo.com/gitweb/z180-stamp.git/blobdiff_plain/78c900276102731b2832eb623b6d7216a32bd500..4912667be3154f62d3206a47b6e748b0b6281ae3:/avr/z180-serv.c

diff --git a/avr/z180-serv.c b/avr/z180-serv.c
index f55b7a8..0ce6b9b 100644
--- a/avr/z180-serv.c
+++ b/avr/z180-serv.c
@@ -399,6 +399,7 @@ static const FLASH char * const FLASH rc_messages[] = {
 			FSTR("Access byond disk size"),				/* 04 */
 			FSTR("Write protect"),						/* 05 */
 			FSTR("No media"),							/* 06 */
+			FSTR("R/W address == 0 !!!!"),				/* 07 */
 		};
 
 void msg_cpm_result(uint8_t subf, uint8_t rc, int res)
@@ -530,6 +531,10 @@ void do_msg_cpm_rw(uint8_t subf, int len, uint8_t * msg)
 	drv_debug(MIDDLE, PSTR(" T:%4d, S:%2d, cnt:%2d, lba: %.8lx, addr: %.5lx"),
 				track, sec, secs, pos, addr);
 
+	if (addr == 0) {
+		return msg_cpm_result(subf, 0x07, res);
+	}
+
 	if (dowrite && dp->opt & DRV_OPT_RO) {
 		return msg_cpm_result(subf, 0x05, res);
 	}