Exchange/RJE Manual

RECEIVE Command
Exchange/RJE Commands
3–40 104698 Tandem Computers Incorporated
Table 3-4. Block Mode With 2780 Blocking RECEIVE Command Block Formats
Normal-Text Block Format
All blocks except last: STX record [ EM ] [ ITB record [ EM ] ]... ETB
Last block: STX record [ EM ] [ ITB record [ EM ] ]... ETX
Maximum block size 4086 bytes (includes 1 byte each for STX and ETB/ETX)
Maximum record size: BLOCKSIZE for the print file
80 bytes for the punch file
Records cannot contain any BSC control characters.
Transparent-Text Block Format
All blocks except last: DLE STX record [ record ]... ETB (for CP6100)
DLE STX record [DLE STX record ]... ETB (for Envoy)
Last block: DLE STX record [ record ]... ETX (for CP6100)
DLE STX record [DLE STX record ]... ETX (for Envoy)
Maximum block size: 4087 bytes (includes 1 byte each for STX and ETB/ETX)
Record size: BLOCKSIZE (maximum), fixed-length, for the print file
80 bytes, fixed-length, for the punch file
Records can contain any character (bit pattern).
Note that for transparent-text block format, all DLEs other than the first DLE are
deleted from the received data by the underlying communications subsystem.
Therefore, these DLEs do not appear in Exchange/RJE trace data (or in a data file
written when RAWDATA is specified). (A DLE as data is sent as DLE DLE, and only
the first DLE is removed.)