NCR Decision Mate V - Page 282

A-1 9 6
COMMAND REGISTER (CR)
C R 7 C R 6
C R 5
C R 4
C R 3
C R 2
C R 1 CRO
O peratin g M od e R eq ues t to
Send
Reset Error
Receive
C o n tro l (R x E N )
D ata T e rm in a l
Read y
Tra n s m it
C o n tro l (T x E N )
00 = Normal operation
01 = A syn ch: atutom atic
echo mode
Synch: SYN and /or
DLE Stripping mode
10 = Local loop back
11 = Remote loop back
0 = Force RTS
O utput High
1 = Force RTS
Output low
0 = Normal
1 = Reset
error flag
in Status reg
(F E ,O E,
PE/DLE detect)
A S Y N C H :
F O R C E B R E A K
0 = Normal
1 = Force
break
0 = Disable
1 = Enable
0 = Force DTR
O utput High
1 = Force DTR
O utput low
0 = Disable
1 = Enable
S Y N C H :
S E N D D L E
0 = Normal
1 = Send DLE
S T A T U S R E G IS T E R (S R )
S R 7
S R 6
S R 5
S R 4
S R 3
S R 2 S R I SRO
D ata S et
Read y
D a ta C arrier
D ete ct
F E /S Y N D ete ct
O v e rrun
P E /D L E D ete ct
T x E M T /D S C H G
R x R D Y T x R D Y
0 = DSR inp ut
is high
1 = DSR input
is low
0 = DCD inp ut
is high
1 = DCD inp ut
is low
A S Y N C H :
0 = Normal
1 = Framing
error
0 = Normal
1 = Overrun
error
A S Y N C H :
0 = Normal
1 = Parity
error
0 = Normal
1 = Change
in DSR or
DCD, or
transm it
sh ift regis
ter is em pty
0 = Receive
holding reg
empty
1 = Receive
holding reg
has data
0 = Transm it
holding
reg busy
1 = Transm it
holding
reg em pty
S Y N C H :
0 = Normal
1 = SYN char
detected
S Y N C H :
0 = Normal
1 = Parity
error or
DLE char
received