Epson FX-80 User Manual page 90

SLCT IN DC1/DC3
On-Line
HIGH/LOW
OFF
ON HIGH
ON
ON LOW
*Data entry will be acknowledged, but the input data will be lost until DC1is input.
Note: ERROR status is assumed to result only in Off-Line state, and the ERROR status does not always mean SLCT IN.
Table K-2. Signal interrelations
ERROR
DC1/DC3 LOW
DC1 HIGH
HIGH
DC3
DC1//DC3 HIGH
BUSY ACKNLG
HIGH Not generated
LOW/HIGH Generated after data entry
same same
same same
DATA ENTRY
Disabled
Enabled (normal entry)
Enabled*
Enabled (normal entry)