Cray CRAY-1 - 16-Bit Synchronous Input Channel Signal Exchange

I
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
Table 6-6.
16-bit synchronous input
channel signal exchange
(SH module)
CRAY-1
Externa 1
Activate
channel
(set CL and CA).
Resume
.-
...
Data
2
63
_2
48
with
Ready
Resume
~
}
Resume
150 nsec
Data
247_
2
32
,
Ready
.-
pulse
...
no
Resume
...
..
Data
2
31
_
2
16
,
no Ready
..
Data
2
15
_
2°
,
no
Ready
Write word to memory; advance
current address.
If last
word,
go to 16.
Resume
...
Resume
.-
..
Data
2
63
_2
48
,
no
Ready
1200 nsec
Resume
.,
pulse
..
Data
2
47
_2
32
,
no
Ready
Resume
~
..
Data
2
31
_2
16
,
no
Ready
..
Data
2
15
_2°
,
no
Ready
Go to 8.
Wait for
Disconnect.
-c
If last word, Disconnect.
Set interrupt and deactivate
channel.
Parity Bits 0 through 3 - Parity Bits 0, 1, 2, and 3 are each assigne9
to a 4-bit group of data bits. The parity bits are set or cleared to
give the
bit group odd parity. Bit assignments are as follows:
Parity Bit 0 Data Bits 20 - 2
3
Parity Bit 1
Parity Bit 2
Parity Bit 3
Data Bits 24 - 27
Data Bits 2
8
- 211
Data Bits 212 - 2
15
Parity bits are sent from the external device to the CRAY-1 at the
same time as the data bits. They are held stable in the same way as
are the data
bits.
2240004
6-14
E