Panasonic JB-3300 Technical Manual page 409

h. Status read (status byte) (320H)
When the controller has completed executing the command, it sets both
the I/O and C/D to the "H" level and reads the status. The controller
sends an ACK signal when the host computer has received the status byte.
Defined Status Byte x
DATA 0 to 7
T /O-
C/D-
~_
REQ
X
__xX
AO, 1 ———-
IOR
IRQ
i oY
1. Switch read
The DIP switch status is read to DO to 7.
TOR Fe fo
SW1 to 8 © Fixed
VII - 14