User`s manual
Code Set
in
RIC 12-15
15
14
13
12
1 1
1
0
1 1 1 1
Code Set in RIC 12-1 5
15
14
13
12
0
0
0
0
0 0 0
1
0 0
1
0
0
0
1 1
0
1
0
0
0
1
0 1
Table 3-5 (Cont)
Receive Function Interrupt Conditions
(For
Synchronous Line Cards)
Meaning
Processing Error
10:
The
DV
11
received a signal on the memory parity error line from the PDP-II
when the
DVII
attempted
to
store the character set in
RIC
00-07.
This con
dition indicates a defect in the memory parity logic,
as
the PDP-II generates
parity error signals only on core memory read operations.
Processing Error
11:
A memory parity error occurred when the
DVII
attempted
to
obtain the con
trol byte corresponding
to
the character in
RIC
00-07.
Table 3-6
Receive Function Interrupt Conditions
(For Asynchronous Line
Cards)
Meaning
Special Character Received:
Bit
00
of
the control byte for the character
in
RIC
00-07
is
set to a one
(generate interrupt), indicating
that
the received character is a special character.
Parity Error:
The character in RIC
00-07
has a parity sense opposite
to
that selected for this
line (the line specified in
RIC
08-11)
by the programmable Format registers
of
the Asynchronous Line Card.
Overrun Error:
The received character(s) preceding the character set in
RIC
00-07
have been
lost because
of
overflow
of
the Received Character Silo.
Framing Error:
The character set in
RIC
00-07
lacked a stop bit present at the proper time.
This code is usually interpreted
as
indicating the reception
of
a break.
Byte Count Warning:
The character set in
RIC
00-07
has been stored
in
core memory.
No
more char-
acters may be stored for this line as the byte count
is
now zero.
Block Check Complete:
The block character(s) for the data block received on this line have arrived and
have been included in the Accumulated
BCC.
The Accumulated
BCC
is
now in
the Receive Accumulated Block
Check Character secondary register; the OR
of
the high and low bytes
of
the accumulated
BCC
is set
in
RIC
00-07.
3-22