Panasonic DBS 824 Manual page 172

Software Version CPC-S and CPC-M, Version 1 0 and higher CPC-M Only (future)
Address FFl 2# 1# 19# (ExtPort)#
Description
This program is reserved for future 3rd-party applications with the CPC-M
card, and currently has no effect on the DBS 824 system, regardless of its
setting
Page 1-24
DBS 824- 1 O-400 Issued 3/l /95