Cray CRAY-1 - CRAY-1 Input Channel Error Conditions

I
CLEAR
INTERRUPT
FLAG
NO
SET
CHANNEL
LIMIT
GET
CHANNEL
INTERRUPT NO.
DETERMINE
NUMBER OF WORDS
TRANSFERRED
CLEAR
INT. ERROR
FLAGS
Figure 6-1. Basic I/O program flow chart
assembled word. If a partial word is found, the valid portion of the word
is stored in memory and the unreceived, lower-order parcels are stored as
zeros. For the OV module, (CA) = (CL) causes the I/O interrupt request
unless the disconnect
is received before the word count is exhausted.
The interrupt flag sets when a disconnect pulse is received or when an
error condition is detected. Setting the interrupt flag deactivates the
input channel.
Input channel
error conditions
1.
Parity error
2240004
OJ/OK asynchronous channel (MCU channel) - The parcel in which
the error occurs will immediately set the channel error flag~
deactivate the channel and generate an I/O interrupt request.
If the error occurred in parcel 0, 1, or 2, the last 64-bit
word is not stored. All input ready pulses received after
the channel is deactivated are resumed but the data parcels
are discarded.
6-4
E