Asynchronous Serial Communications Programmer's Reference Manual (32022-90052)

Appendix A 291
Comparing MPE/iX Systems to MPE V Systems
Terminal Types and Printer Types
Table A-2 MPE/iX Printer Types Overview
As devices are moved from an MPE V system to an MPE/iX system, see
Table A-3 and Table A-4 to decide which terminal or printer type to use
with each of your asynchronous devices.
Table A-3 Terminal Type Migration for Terminals
MPE/iX
Printer Type
Similar MPE V
Terminal Type
Differences
18 18 Enhanced XON/xoff protocol on MPE/iX
21, 22, 26 21, 22, 26 Enhanced XON/XOFF protocol on MPE/iX.
No ENQ/ACK protocol on MPE/iX.
Printer initialization string of MPE V’s TTPCL22 is used.
Printer status checks are done less frequently on MPE/iX;
status requests are not sent after each printed line.
MPE V
Terminal
Type
Description
Use MPE/iX
Terminal
Type
Comments
6, 9 Non-HP hardcopy device
needing delays after
linefeed or formfeed.
None Devices that need delays are not
supported on MPE/iX.
10 General HP CRT terminal
using both ENQ/ACK and
XON/XOFF protocol.
10 Only XON/XOFF protocol is used
on MPE/iX.
12 8-bit character version of
terminal type 10. Used with
languages that need
extended character sets.
10 Bits per characterno longer defined
by terminal type.
13 Terminal type 10 with no
echo or ENQ/ACK protocol.
Used for plotters or the
HP 2601 printer.
None Similar terminal type can be
created with TTUTIL.
15, 16 8-bit and 7-bit HP 2635
hardcopy terminal.
None These terminal types specify use of
a backspace response action not
supported on MPE/iX.
18 Terminal type 10 without
ENQ/ACK protocol or a
read trigger. Used with
non-HP devices.
18 Enhanced XON/XOFF protocol is
used on MPE/iX.
24 Terminal type used for PAD
terminals supporting page
block mode.
24 Terminal type used for PAD
terminals supporting page block
mode. (Note that the block mode
support is for VPLUS block mode
only.)