Fix control register selection.

diff --git a/cia.cpp b/cia.cpp
index bbe303f23db52aa4790db71d1bbbd2714981e235..482c1a8d7e456e3b67b4fff502b7635f8de96ed3 100644 (file)
--- a/cia.cpp
+++ b/cia.cpp
@@ -1689,7 +1689,7 @@ static void CIA_cr_write(int num, int tnum, uae_u8 val)
        }
 
        // clear serial port state when switching TX<>RX
-       if (num == 0 && (t->cr & 0x40) != (val & 0x040)) {
+       if (tnum == 0 && (t->cr & 0x40) != (val & 0x040)) {
                c->sdr_cnt = 0;
                c->sdr_load = 0;
                c->sdr_buf = 0;