HP 262SA - Block Data Transfers; Introduction; Handshaking; Handshake Types

Block Data Transfers
INTRODUCTION
Block Data Transfer
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This section describes block data transfers from the terminal to the host computer. The types of
block
transfers (all of which occur in Remote mode) are as follows:
• Initiated by the. key.
•
Initiated by the CCEc d" escape sequence.
•
Data transfer in Line Modify or Modify All mode.
•
Transfer of the definition string of a cCTransmit" type function key when it is pressed in
Remote mode.
•
Transfer of one or more user key definition string(s) when the. key is pressed, or the
cCEc d" sequence is received, while the User Key menu is displayed.
•
Status data transfer.
The
manner in which data is transferred depends on the combination of terminal modes, as
defined by the Li ne/Page(D), I nhHndShk (G), I nh DC2(H), Au t oTerm( J), and Cl earTerm(K)
selections, as well as the Block, Character, Line Modify, Modify All, Format, non-Format, and
Auto Linefeed modes.
HANDSHAKING
The InhHndShk(G) and Inh DC2(H) selections on the Terminal Configuration menu deter-
mine,
in general, the type of handshaking to be used when transferring blocks of data from the
terminal to the host computer.
Handshake Types
There are three possible handshakes:
1. No handshake, also known as a type 1, in which the terminal simply sends the data block.
2. A DC1 Trigger handshake (type 2), in which the host computer must trigger the block
transfer with a DCI character.
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