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Offset<br />
28 (lC) 1<br />
29 (lC) • 1<br />
28 (lC) 1<br />
29 (lD) • 1<br />
30 (lE) •• 2<br />
Bytes and Field<br />
Alignment Name<br />
1. •• • •••<br />
• 1 ••<br />
•• 1.<br />
••. 1<br />
.1 ••<br />
.•• 1<br />
x.x.<br />
IOBCRDCC<br />
IOBCRILC<br />
10 BERRC T<br />
Byte 1<br />
Byte 2<br />
1111 1 •••<br />
.000<br />
• ••• .010<br />
.011<br />
.110<br />
.111<br />
.101<br />
INPUT/OUTPUT BLOCK<br />
Field Description, Contents, Meaning<br />
STANDARD FIELDS (Continued)<br />
BTAM:<br />
SAD or ENABLE issued by OPEN resulted in a permanent<br />
I/O error. If the lOB is for a local 3270 device,<br />
this bit indicates that OPEN did not initialize the<br />
device because it was being used by OLTEP.<br />
This lOB is currently in use by an I/O operation •<br />
RVI was received. (3270) •<br />
RFT received from control unit capable of general<br />
poll (3270). Request-for-test message from a remote<br />
3270.<br />
Turned on after a remote 3270 error status message<br />
has been processed.<br />
Line is under on-line test operation •<br />
(Reserved bits)<br />
BTAM used for timer value (OPEN and LOPEN).<br />
Optical Reader: Data check error count.<br />
Optical Reader: Incorrect length error count.<br />
Error counter (local 3270 only).<br />
The local 3270 ERP uses this byte to keep a count of<br />
retry attempts.<br />
The local 3270 ERP uses these bits as flags during<br />
retry attempts.<br />
If bit 5 of IOBFLAGl is off, the local 3270 ERP has<br />
recovered from the error. If on, the local 3270 ERP<br />
has not processed the error.<br />
The local 3270 ERP could not recover from the error.<br />
The problem program must reconstruct the buffer<br />
image.<br />
The local 3270 ERP determined that the error is<br />
permanent and non-recoverable.<br />
The local 3270 ERP determined that the channel<br />
program or data stream builder of the problem program<br />
can recover from the error.<br />
The local 3270 ERP determined that the local 3270<br />
channel end/abnormal appendage should perform retry.<br />
The local 3270 channel end/abnormal end appendage is<br />
attempting to recover from the error by retrying the<br />
channel program.<br />
Note: Every BSC2 lOB has been extended for 8 bytes; the extension will contain the 3275<br />
Dial terminal ID received during connection.<br />
BTAM EXTENSION<br />
EXTENSION SEGMENTS<br />
32 (20) 1 10 BUCBX UCB index. The line number is used as an index to<br />
locate the proper UCB address in the DEB.<br />
33 (21) . 5 IOBWORK Work area used by error routines and on-line terminal<br />
test routines.<br />
38 (26) . . 1 IOBRCVPT Received ACK (ACK-O or ACK-l).<br />
216 OS <strong>System</strong> <strong>Control</strong> <strong>Blocks</strong> (Release 21.7)
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