# I/O Use
1 > Cass 1 motor control (CRU bit 22)
2 > Dito (neg)
3 > Output to tape 2 (CRU bit 25)
4 > Audio gate (CRU bit 24)
5 > Output to tape 2 (neg)
6 > Cass 2 motor control (CRU bit 23)
7 > Dito (neg)
8 < Input from tape 1 or 2 (CRU bit 27)
9 < Dito (neg)

N.B. Cassette 1 can't be written to.