HP Terminals Application Note

 North American Response Centers
HP 3000 APPLICATION NOTE
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PACKARD Document P/N 5958-5824/2636
| у HEWLETT Revised September 1, 1986
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NOTICE
The information contained in this document is subject to change without notice.
HEWLETT-PACKARD MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS
MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Hewlett-Packard shall not be
liable for errors contained herein or for incidental or consequential damages in connection with the
furnishing, performance or use of this material.
This document contains proprietary information which is protected by copyright. All rights are reserved.
Permission to copy all or part of this document is granted provided that the copies are not made or
distributed for direct commercial advantage; that this copyright notice, and the title of the publication
and its date appear; and that notice is given that copying is by permission of Hewlett-Packard Company.
To copy otherwise, or to republish, requires prior written consent of Hewlett-Packard Company.
Copyright © 1986 by HEWLETT-PACKARD COMPANY
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‚+ This terminal type is supported with device type 16 only on MPE IV and MPE V/P ADCC and ATC
ports. It is used for HP2600A or Datapoint 3300 keyboard display terminals at (10,15,30,60,120,240
5 cps).
Flow Control: — XON/XOFF with timer disabled
Block Mode: not supported
Read Trigger: DC1 character (XON character)
Special Characters: Standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
Stripped Characters: XON/XOFF characters if handshake disabled,
subsystem break if disabled, NUL, DEL.
Terminal Control: Initial echo on, linefeed accepted during input
| data, linefeed character replaces formfeed in
output data, system response to a backspace is an
end-of-marker character, 7 databits recognized.
Printer Control: None.
Considerations: This terminal type is rarely seen as the devices
| requiring it are quite archaic. If used on MPE
V/E or above there is a delay protocol that has
been added which will cause the display output to
pause for .3 seconds at every linefeed.
HP Computer Museum
www.hpmuseum.net
For research and education purposes only.
This terminal type is supported with device type 16 on MPE IV and MPE V ATC, ADCC and ATP ports.
It is used for HP2762 A/B (General Electric terminet 300 or 1200), or Data Communications terminal
model B at (10,15,30,120 cps) with
equipped for echoplex.
Flow Control:
Block Mode:
Read Trigger:
Special Characters: -
Stripped Characters:
Terminal Control:
Printer Control:
Considerations:
paper tape reader/ punch, option 2. Note: this terminal must be
XON/XOFF with timer disabled. On MPE V/E and
above there is a delay protocol of .3 seconds for
line feeds and form feeds.
not supported.
DC1 character (XON character)
Standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
XON/XOFF if handshake disabled, subsystem break if
disabled, NUL, DEL.
Initial echo on, linefeed accepted during input
data, form feed allowed in output data, system
response to a backspace is a linefeed character.
7 databits recognized. A DC3 character is output
after each linefeed.
none.
Watch out for delay protocol for this termtype.
On termtype 6 the ADCC actually outputs 45 NUL's
after a carriage return or linefeed at 240 cps.
This terminal type is supported with device type 16 on mpe IV and MPE V ATC, ADCC and ATP ports.
It is used for the old HP2615 Beehive Mini Bee. It is also widely used for foreign terminals which do not
use eng/ack flow control or block mode.
Flow Control:
Block Mode:
Read T rigger:
Special Characters:
Stripped Characters:
Terminal Control:
Printer Control:
Considerations:
XON/XOFF with timer disabled. On MPE V/E and
above there is a delay protocol of .3 seconds for
linefeeds and formfeeds.
not supported
DC1 character (XON character)
Standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
XON/XOFF if handshake disabled, subsystem break if
disabled, NUL, DEL.
Initial echo on, line feed accepted as input data,
formfeed allowed in output data, no system
response to a backspace, 7 databits recognized.
none
Because of the delay protocol used with V/E and
above operating systems this terminal type is
infeasible for foreign terminals. The symptoms
are a very sluggish terminal (.3 seconds line feed
delay). Terminal type 18 does not use this delay
protocol and is generally recommended for foreign
terminal applications.
>
This terminal type is supported with device type 16 on all versions of MPE for any asynchronous port,
It is used for HP terminals and devices including the 264x,262x and 239x families of terminals as well as
the HP 150. This terminal type is also used on foreign terminals which emulate HPs enq/ack protocol
and block mode data transmission. These include the Direct 825 and 1025.
Flow Control:
Block Mode:
Read Trigger:
Special Characters:
Stripped Characters:
Terminal Control:
Printer Control:
Considerations:
ENQ/ACK with time out transmission after 10
seconds. XON/XOFF with timer disabled.
Enabled for line and page block mode. Alert
character is a DC2, trigger character is a DC1.
DC1 character (XON character)
Standard Control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
XON /XOFF if handshake disabled, subsystem break if
disabled, NUL, DEL.
initial echo on, linefeed accepted as input data,
no system response to backspace, 7 databits
recognized. ;
none
If a non HP terminal is configured with termtype
10 the computer will send an ENQ character but the
terminal will not respond so only 80 characters
are printed every 10 seconds.
¢
This terminal type is supported with device type 16 starting with MPE T-DELTA 4 (G.01.04) and
О-МИ (С. А2. 00). It is used for HP terminals and devices including the 264X, 262X, and 239X families
of terminals. | :
This terminal type fixes problems with ADCC ports in regards to "ESC character processing and echo.
Some full screen applications, such as HPSLATE, which read a lot of escape sequences, can display
garbage on the screen. With TT10NOEC, the escape character is not treated as a special character by
the ADCC software. Character echo will be done by software instead of ADCC hardware. Since the
escape character is no longer recognized by ADCC software, the "ESC; and "ESC:" commands to turn
echo off and on will no longer work. Two programs are supplied to perform these functions:
ECHOON, PUB. SYS and ECHOOFF.PUB.SYS.
This terminal type must not be used with ATP ports. -
Flow Control: | ENQ/ACK with time out transmission after 10
seconds. XON/XOFF with timer disabled.
Block Mode: Enabled for line and page block mode. Alert
character is a DC2, trigger character is a DC1.
Read Trigger: DC1 character (XON character)
Special Characters: Standard Control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
Stripped Characters: XON/XOFF if handshake disabled, subsystem break if
| disabled, NUL, DEL. | |
Terminal Control: initial echo on, linefeed accepted as input data,
no system response to backspace, 7 databits
recognized.
Printer Control: none
Considerations: | If a non HP terminal is configured with termtype
TT1ONOEC the computer will send an ENQ character
but the terminal will not respond so only 80
characters are printed every 10 seconds.
This terminal type is supported with device type 16 on all versions of MPE for any asynchronous port,
It is used for native language extended characters sets on HP terminals over ATC ports and for the
HP2645 Katakana/Roman data terminal. The only difference between this terminal type and termtype
10 is that termtype 12 expects 8 data bits where termtype 10 expects 7. ;
Flow Control:
Block Mode: ‘
Read Trigger:
Special Characters:
Stripped Characters:
Terminal Control:
Considerations:
+
ENQ/ACK with time ° out retransmission after 10
seconds. XON/XOFF with timer disabled.
enabled for line and page block mode. alert
character is a DC2: Trigger character is.a DC1.
DC1 character (XON character)
Standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break. .
XON/XOFF if handshake disabled, subsystem break if
disabled, NUL, DEL.
initial echo on, linefeed accepted as input data,
formfeed allowed in output data, no system
response to backspace, 8 data bits with no parity.
HP terminals on ATP ports or ADCC ports must be
configured for parity=none, chk parity=no and data
bits=8 when used for NLS/3000 on termtype 10.
This terminal type is supported with device type 16 on all versions of MPE for any asynchronous port.
It is used for message switching networks or communication with other computers where echo is not
desired. It is also common on a 2601A printer although termtype 18 is recommended.
Flow Control:
Block Mode:
Read Trigger:
Special Characters:
Stripped Characters:
Terminal Control:
Printer Control:
Considerations:
XON/XOFF with timer disabled
line and page block mode with alert character DC2
and trigger character DC1
DC1 character (XON character)
Standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
XON/XOFF characters if handshake disabled,
subsystem break if disabled, NUL, DEL. | |
initial echo off, linefeed accepted as input data,
formfeed allowed in output data, no system
response to a backspace, 7 data bits , none or
zeros parity eT
none
HP2601A and 2602B printers frequently use this
termtype however the block mode and echo are not
needed and termtype 18 will work fine.
This terminal type is often used over Telenet and
Tymnet networks where the user would be charged
for those echoed characters.
_erminal Type 14
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This terminal type is used by HP MTS terminals which use synchronous data transmission over an INP.
It will not work over any asynchronous controller although it does have the same characteristics as
termtype 10,
Flow Control:
Block Mode:
Read Trigger:
Special Characters:
Stripped Characters:
Terminal Control:
Considerations:
ENQ/ACK with time out transmission after 10
seconds. XON/XOFF with timer disabled.
enabled for line and page block mode. alert
character is a DC2, trigger character DC1
DC1 character (XON character)
Standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
XON/XOFF if handshake disabled, subsystem break if
disabled, NUL, DEL.
none
Terminals running on MTS are the only devices
using this terminal type. MTS terminals connected
to a 2333a cluster controller will use termtype 10
however.
These terminal types are supported on MPE IV and MPE V over any asynchronous controller. They are
grouped together because they are both used for the same single device, the 2635 printing terminal. The
difference being that terminal type 15 is used for 8 bit data transmission needed for NLS/ 3000 or other
extended character sets,
Flow Control:
Block Mode:
Read Trigger:
Special Characters:
Stripped Characters:
Terminal Control:
Considerations:
ENQ/ACK, XON/XOFF with timer disabled.
not supported
DC1 character (XON character)
Standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
XON/XOFF characters if handshake disabled,
subsystem break if disabled, NUL, DEL.
initial echo on, linefeed accepted during input
data, linefeed replaces formfeed in output data,
system response to a backspace is an line feed
character, 7 data bits bits for termtype 16 and 8
data bits for terminal type 15.
As of MPE V/E Block Mode has been removed from
termtype 15 and 16. Terminals configured with
this termtype . that use block mode must be
reconfigured to a supported block mode termtype
like 10 or 12. | |
This terminal type is supported with device types 16 & 32 on all versions of MPE for any asynchronous
port. It is used for all foreign terminals that do not use ENQ/ACK and printers with less intelligent
controllers. It is not supported spooled. > | |
Flow Control: XON/XOFF with timer disabled.
Block Mode: not supported.
Read Trigger: NUL
Special Characters: Standard control charactere for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
Stripped Characters: XON/XOFF characters if handshake disabled,
subsystem break if disabled, NUL, DEL.
Terminal Control: initial echo on, linefeed accepted during input
| data, formfeed allowed in output data, no system
response to a backspace, 7 data bits recognized.
Printer Control: none
Considerations: This terminal type is considered the "plain
| vanilla" terminal type used with foreign devices
and some HP devices. Terminal type 18 is not
supported for spooled printers because no status
checking is done for possible printer problems.
Status checking is the printer control HP uses to
stop and save an active spoolfile when a condition
such as "paper out" occurs. Status checking will
also print a message at the console indicating
what the problem may be. Printers requiring this
terminal type do not have the firmware to respond
to status checking.
10
This terminal type is supported with device type 32 on MPE V/E ,T-MIT and above operating systems
which allow user defined terminal types created with the workstation configurator, It is shipped on MPE
V T-MIT and above installation tapes. It has been designed to provide enhanced control for printers
that do not use termtype 19 or 21. It also can be used for extended character printing or used over a
multiplexer,
Flow Control:
Block Mode:
Read Trigger:
Special Characters:
Stripped Characters:
Terminal Control:
Printer Control:
Considerations:
XON/XOFF with 60 second timer enabled upon receipt
of each XOFF. If an XON is not received in 60
seconds a message is displayed on the console an
the CPU continues to wait for the XON. |
not supported
-— NUL
Standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
XON/XOFF characters if 1handshake disabled,
subsystem break if disabled, NUL, DEL.
initial echo on, formfeed allowed in output data,
linefeed accepted as input data, no system
response to backspace, 8 data bits no parity.
Printer initialization to hard reset, disable
display functions mode and turn on auto perf-skip.
Because of the 60 second timer and the added
printer initialization this should be a desired
terminal type for HP printers currently on
termtype 18. This terminal type is also
recommended for HP printers over a multiplexer
when higher throughput ¡is desired. Increased
throughput is achieved by the elimination of
printer status checking.
11
This terminal type is supported with device type 16 starting with MPE T-DELTA 4(G.01.04) and
U-MIT (С. А2. 00). It is used for HP terminals and devices including the 264X, 262X, and 239X families
of terminals, |
This terminal type fixes problems with ADCC ports in regards to "ESC" character processing and echo.
Some full screen applications, such as HPSLATE, which read a lot of escape sequences, can display
garbage on the screen. With TT18NOEC, the escape character is not treated as a special character by
the ADCC software. Character echo will be done by software instead of ADCC hardware. Since the
escape character is no longer recognized by ADCC software, the "'ESC;" and "ESC:"” commands to turn
echo off and on will no longer work. Two programs are supplied to perform these functions:
ECHOON. PUB.SYS and ECHOOFF.PUB.SYS.
This terminal type must not be used with ATP ports.
Flow Control: XON/XOFF with timer disabled.
Block Mode: | not supported.
Read Trigger: NUL |
Special Characters: Standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
Stripped Characters: XON/XOFF characters if handshake disabled,
subsystem break if disabled, NUL, DEL.
Terminal Control: initial echo on, linefeed accepted during input
data, formfeed allowed in output data, no system
response to a backspace, 7 data bits recognized.
Printer Control: | попе
Considerations: This terminal type ¡is considered the "plain
vanilla” terminal type used with foreign devices
and some HP devices. Terminal type 18 is not
supported for spooled printers because no status
checking is done for possible printer problems.
Status checking is the printer control HP uses to
stop and save an active spoolfile when a condition
such as "paper out” occurs. Status checking will
also print a message at the console indicating
what the problem may be. Printers requiring this
terminal type do not have the firmware to respond
to status checking.
12
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This terminal is supported with device type 32 beginning with TDELTA 4 (G.01.04) and U-MIT
(С. А2. 00). It was not released with MPE but is available with an ATP/ADCC patch.
This terminal type fixes a problem with ATP firmware XON/XOFF processing with terminal type 18.
If a XON follows a XOFF too closely, the ATP firmware may miss the XON which will cause the port to
hang. This senario can happen with printers connected to the 3000 via multiplexers. TT18PLUS will
cause the XON/XOFF handshake to be done in software instead of ATP firmware.
This terminal must not be used with ADCC ports.
Flow Control: XON/XOFF with timer disabled.
Block Mode: | not supported. |
Read Trigger: NUL
Special Characters: Standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
Stripped Characters: XON/XOFF characters if handshake disabled,
subsystem break if disabled, NUL, DEL.
Terminal Control: initial echo on, linefeed accepted during input
data, formfeed allowed in output data, no system
response to a backspace, 7 data bits recognized.
Printer Control: none
Considerations: This terminal type is considered the "plain
vanilla” terminal type used with foreign devices
and some HP devices. Terminal type TT18PLUS is
not supported for spooled printers because no
status checking is done for possible printer
problems. Status checking is the printer control
HP uses to stop and save an active spoolfile when
a condition such as "paper out” occurs. Status
checking will also print a message at the console
indicating what the problem may be. Printers
requiring this terminal type do not have the
firmware to respond to status checking.
13
This terminal type is supported with device type 32 on all versions of MPE for any asynchronous port.
It is used for HP spooled printers that have more intelligent controllers including the 256X, 263X and
293X printer families.
Flow Control:
Block Mode:
Read Trigger:
Special Characters:
Stripped Characters:
Terminal Control:
Printer Control:
Considerations:
XON/XOFF with timer disabled
not supported
DC1 character (XON character)
standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
XON/XOFF characters if handshake disabled,
subsystem break if disabled, NUL, DEL
initial echo on, formfeed allowed in output data,
linefeed accepted in input data, no system
response to a backspace, 7 data bits odd parity.
Printer initialization to disable display
functions, enable HP terminal mode, turn off
underlining, set ROM1 to second character set, set
ROM2 to primary character set, set pitch at 10.0,
set line spacing at 6 lines per inch, clear
horizontal tabs, set right margin, set left
margin, slew 1 line at line feed, turn on auto
perf-skip, disable char set selection control.
Termtype 19 sends a status request to the printer
when the printer is opened, at the end of every
line and when the port receives an XOFF character.
This status request checks for printer online,
paper and transmission errors. If the printer
does not reply within 10 seconds a spoolee 1/0
error is encountered and the printer will stop
spooling.
If the printer is remote and a multiplexor is
used, the status request may not always return
within 10 seconds. Termtype 21 does not generate
a status request at the receipt of an XOFF.
Instead a 60 second timer is started and if an XON
is not received in that time a “device not ready"
message is displayed and the spooler will continue
to wait for the XON.
14
This terminal type is supported with device type 32 on MPE V/E , T-MIT and above operating systems
which allow user defined terminal types created with the workstation configurator, It is shipped on MPE
V T-MIT and above installation tapes. It is used for HP direct connect and remote spooled printers such
as the 256X and 293X printers. The difference between this termtype and termtype 19 is that this one
contains less printer initialization. This makes it simpler for the user or programmer to select desired
printer settings.
Flow Control:
Block Mode:
Read Trigger:
Special Characters:
Stripped Characters:
Terminal Control:
Printer Control:
Considerations:
XON/XOFF with timer disabled
not supported
DC1 character (XON character)
Standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
XON/XOFF characters if handshake disabled,
subsystem break if disabled, NUL, DEL
initial echo on, formfeed allowed in output data,
linefeed accepted in input data, no system.
response to a backspace, 7 data bits odd parity
Printer initialization to hard reset, disable
display functions mode, enable auto perf-skip
TTPCL19 contains the same status checks as
termtype 19. Because there are no control
sequences to tell the printer what column to start
in, what line spacing to use, what slew should be
used, what pitch or character set the printer
should have, the printer can be set directly thus
giving users more flexibility and control.
15
This terminal type is supported with device type 32 on MPE V/E , T-MIT and above operating systems
using ADCC or ATP controllers. It is used for HP printers such as the 256X, 263X and 293X series
printers where 8 data bits are required. It is not supported as a remote printer termtype.
Flow Control:
Block Mode:
Read Trigger:
Special Characters:
Stripped Characters:
Terminal Control:
Printer Control:
Considerations:
XON/XOFF with timer disabled
not supported
DC1 character (XON character)
Standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
XON/XOFF if handshake disabled, subsystem break if
disabled, NUL, DEL.
initial echo on, form feed allowed in output data,
linefeed accepted in input data, no system
response to a backspace, 8 data bits no parity.
Printer Initialization to disable display
functions mode, enable HP terminal mode, turn off
underlining, set ROM1 to secondary character set,
set ROM2 to primary character set, set pitch to
10.0, set line spacing to 6 lines per inch, clear
horizontal tabs, set right margin, set left
margin, hard reset, slew 1 line at line feed, turn
on. auto perf-skip, enable char set selection
control.
Termtype 20 is used primarily for NLS/3000 where 8
databits are required. Other than this it is the
same as termtype 19 with status requests sent
after each line feed and XOFF.
16
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This terminal type is supported with device type 32 on MPE V/E, T-MIT and above operating systems
using ADCC or ATP controllers. It is used for HP printers such as the 256X, 263X and 293X series
spooled printers. Its primary use is to allow the use of embedded printer control escape sequences in the
data which may cause errors with termtype 19 because of status checks after each XOFF. |
Flow Control: XON/XOFF with 60 second timer upon receipt of each
XOFF. If XON is not received in 60 seconds a
message is displayed at the console and the CPU
continues to wait for a XON
Block Mode: not supported
Read Trigger: DC1 character (XON character)
Special Characters: Standard control characters for HP terminals are
- used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
Stripped Characters: XON/XOFF characters if handshake disabled,
subsystem break if disabled, NUL, DEL
Terminal Control: | initial echo on, formfeed allowed in input data,
| linefeed accepted in ¡input data, no system
response to a backspace, 7 data bits odd parity
Printer Control: Printer initialization to hard reset, disable
| display functions mode, enable HP terminal mode,
turn off underlining, set ROM! to secondary
character set, set ROM2 to Primary character set,
set print pitch to 10.0, set line spacing at 6
lines per inch, clear horizontal tabs, set right
margin, set left margin, slew 1 line at line feed,
turn on auto perf-skip, disable character set
selection control.
Considerations: This terminal type enables you to insert printer
control escape sequences into data. If this is
done using terminal type 19 a printer error may
occur if a status request, as a result of an XOFF,
is sent in the middle of the embedded escape
sequence. Terminal type 21 is also useful in
remote applications where a status request may not
be answered in less than 10 seconds vhich causes a
spoolee 1/0 error. This is typically seen when
the printer is remote and passes through: a
statistical multiplexor. Termtype 21 does not
send status requests after XOFF’s. -
17
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This terminal type is supported with device type 32 on MPE V/E, T-MIT and above operating systems
using ADCC or ATP controllers. It is used for HP direct connect printers such as the 256X, 263X and
293X series spooled printers where 8 data bits are required. It also allows embedded printer control
escape sequences as it does not do status checks after each XOFF. It is not supported remotely.
Flow Control: XON/XOFF with 60 second timer enabled upon receipt
of each XOFF. If an XON is not received in 60
seconds a message is displayed on the console and
the CPU continues to wait for the XON.
Block Mode: not supported
Read Trigger: DC1 character (XON character)
Special Characters: Standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
Stripped Characters: XON/XOFF characters if handshake disabled,
subsystem break if disabled, NUL, DEL
Terminal Control: initial echo on, formfeed allowed in input data,
no system response to a backspace, 8 data bits no
parity.
Printer Control: Printer initialization to disable display
functions mode, enable HP terminal mode, turn off
underlining, set ROM1 to secondary character set,
set ROM2 to primary character set, set pitch to
10.0, set line spacing to 6 lines per inch, clear
horizontal tabs, set right margin, set left
margin, slew 1 line at line feed, turn on auto
perf-skip, enable char set selection control.
Considerations: This terminal type is used for NLS/3000 or
extended character sets where embedded printer
control will be used. It is also highly
recommended for 26318 ог 293x printers over a
statistical multiplexer. |
18
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OO . у SOAS EXI (OO "a Qu . + LJ a. OO Xo к SOR
+ [] e. pi + км + px 5 +. А и + + XX + Е) LL) LJ + WHS >. 2 ops eee rt A x с LJ +
+ I DC) + +
* .
This terminal type is supported with device type 32 on MPE V/E, T-MIT and above operating systems
which allow user defined terminal types created with the workstation configurator. It is shipped on MPE
V T-MIT and above installation tapes. It is used for HP direct connect printers that need termtype 20
or 22 but without any undesirable printer initialization.
Flow Control:
Block Mode:
Read Trigger:
Special Characters:
Stripped Characters:
Terminal Control:
Printer Control:
‘Considerations:
XON/XOFF with 60 second timer enabled upon receipt
of each XOFF. If an XON is not received in 60
seconds a message is displayed on the console and
the CPU continues to wait for the XON.
not supported
DC1 character (XON character)
Standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
XON/XOFF characters if handshake disabled,
subsystem break if disabled, NUL, DEL
initial echo on, form feed allowed in output data,
linefeed accepted as input data, no system
response to a backspace, 8 data bits no parity.
Printer initialization to hard reset, disable
display functions mode, enable auto perf-skip
TTPCL22 contains the same characteristics as
termtype 22 except for printer initialization.
The printer control on TTPCL22 allows users to set
characterstics directly thus allowing more
flexibility and control.
19
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This terminal type is used for X.25 PAD (Packet Assembler/ Disassembler) access on versions of X.25
software beginning with B.01.00. It is used for VPLUS applications with 2622A, 2623A, 2624B (with
the proper ROM versions), 2625A, 2627A, 2628A, 239X, and 150 terminals.
Flow Control: Both the X.25 PAD and the HP terminal should be
set to XON/XOFF flow control.
Block Mode: VPLUS applications only. There is NO DC2 alert or
DCi trigger.
Read Trigger: none
Special Characters: - Standard control characters for backspace, cancel,
end-of-record, and subsystem break. Note that
these characters may have significance to the X.25
PAD.
Terminal Control: Is controlled by the X.25 PAD. Echo is done by
the PAD and initially set on by X.25 software.
»
Printer Control: | none
Considerations: Terminal type 24 is recognized only by the IOPADO
driver for X.25 PAD access.
20
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This terminal type is supported with device type 16 on all versions of MPE for ADCC and ATP
controllers. This is the default terminal type that is used if the I/O configuration contains an invalid
terminal type name or file. It is the same as termtype 18 except for system response to a backspace
which is a slash character.
Flow Contol: XON/XOFF with timer disabled
Block Mode: not supported
Read Trigger: NUL
Special Characters: standard control characters for HP terminals are
used. These include control sequences for console
attention, backspace, cancel, end-of-record and
subsystem break.
Stripped Characters: XON/XOFF characters if handshake disabled,
subsystem break if disabled, NUL, DEL
Terminal Control: initial echo on, linefeed accepted during input
data, formfeed allowed in output data, system
response to a backspace is a slash character, 7
data bits recognized
Printer Control: none
Considerations: If users ever complain of a backslash appearing
every time they hit the backspace key remember
that you probably have an invalid terminal type
name or file.
21
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ый
User defined terminal types are supported on MPE V/E, T-MIT and above operating systems on ADCC
and ATP terminal controllers, They are created by a local area office or buy purchasing the
workstation configurator, (ttutil, pub.sys). This product is used to create any desired terminal type
characteristic. This can be flow control, block mode support, read trigger, special characters etc... .
The most useful advantage however is probably vertical forms control. Different VFC files can be set
up to initialize printers in different ways.
With the workstation configurator different VFC files can be used with any given output file using the
ENY parameter of the file equation. This enables users to send any valid escape sequence to the device
at spoolfile initialization. These escape sequences can posistion the cursor, define the character set, set
up line spacing, pitch, slew etc... It also allows the same port to be used in a number of different ways
without reconfiguring.
With different devices coming out, the workstation configurator will allow users to easily modify
termtype characteristics suited to a particular device. In the past new devices were introduced with
options that were not available because of the terminal type needed to make the device work. The
workstation configurator has been helpful in 1 instantly creating a terminal type that will allow all device
characteristics to be used.
Considerations: Workstation Configurator termtype files will show
up with 2 question marks in the assigned termtype
field of a sysdump listing. Make sure a record of
the current termtype exists.
Problems may occur with Workstation Configurator
files used with terminals running applications
such as Deskmanager or Slate. These products do a
fcontrol to find out the terminal type and are
returned а 0 because a Workstation Configurator
terminal type file is not expected. Because a 0
is returned, Slate and Desk think they are being
run on a dumb terminal and may not work if the
application is block mode.
22
Backspace Response:
Block Mode:
Delay Protocol:
Echo:
Enquiry/Acknowledge:
When a backspace is entered the previous character is deleted
from the input stream. Different devices expect slightly different
codes to perform this action and cause the desired effect. Most
commonly, the system response to a backspace is nothing. With
the workstation configurator you may also erase the character
you backspace to.
Some devices require the end of medium character to move the
display cursor back. Hard copy terminals generally require a line
feed to move the print head one space down so data is not
overprinted. For devices which can not physically move the print
head backward an option is available in which the driver responds
to each backspace by sending a slash character followed by the
character deleted which will then give the user some idea of how
many characters have been deleted.
Block Mode is a method of transferring data from the terminal to
the computer. Instead of sending each character as it is typed,
the terminal buffers a line or more of data and sends the entire
block when the user has pressed ENTER. With the Workstation
Configurator you have the ability to specify the type of block
mode supported along with defining the alert and block trigger
characters.
The delay protocol is a method of control intended for printers
where the print head has to physically return when a line feed or
form feed is encountered. The extra time required for this
physical movement of the print head may result in data overrun
or overprinting unless the delay protocol is added. With the
workstation configurator the delay flow control and delay time
variable are optional.
When the terminal is in remote mode, in character mode, and
local mode is disabled, characters typed on the keyboard are not
placed in the display by the terminal. The computer must echo
(or send back to the terminal) each character as it is received.
When it is desired that the characters typed not be displayed ,
such as when entering a password, echo may be disabled.
The ENQ/ACK protocol is a flow control method that is
controlled by the driver. When writing data to the terminal, the
driver breaks the data into blocks. After each block has been
written, the driver sends an enquiry character to the device and
waits for an acknowledge character to come back to the
computer. When the device sees the enquiry character it responds
with the acknowledge character if it can accept the next full
block of data. If not, the device waits until it can accept the next
block with an acknowledge. With the Workstation Configurator
the device can be configured so the CPU will send another block
23
Flow Control:
Form Feed in Output:
Line Feed in Input:
Parity:
Printer Control:
Read Trigger:
or another enquiry if no acknowledge is received within the 10
second time out.
Flow Control is the method by which the flow of data between the
computer and the terminal device may be controlled so as to avoid
sending data faster than the receiver can handle it. ENQ/ACK,
XON/ XOFF, delay, read trigger and block mode reads are various
methods of handling flow control on a HP 3000 asynchronous
port.
Some devices do not recognize and act upon the formfeed
character in a useful manner. One of the terminal type
characteristics available specifies that each form feed character
in the outgoing data stream may be replaced with a different
character. Usually this is the line feed character,
Some devices do not provide an automatic wraparound when
typing characters beyond the end of a display line. Without the
wraparound, typing at the end of the line places each character
upon all previously typed characters in the last posistion of the
display line, To resolve this problem the linefeed character may
be selected as a special character. Receipt of the linefeed
‚ character causes the HP 3000 to echo the line feed, write а
carriage return character to the terminal and remove the line
feed character from the input data.
Parity is a means of verifying that data is transmitted between
the terminal and computer without error, These bits may all be
used for the character code (with 256 possible character codes
available), or seven bits used for the character code (allowing 128
characters) and the eighth bit used as a parity bit.
If seven data bits are used there are 4 possible parity settings:
force to 0 where the parity bit is always 0, force to 1, odd or even
parity where the parity bit is set to either 0 or 1 so that the total
number of 1 bits in the eight bit character is either even or odd
depending on the parity type enabled.
When a printer is shared among users each user may want to use
the printer in a different way and consequently alter the settings
on the printer by direct changes or escape sequences. The user
may change characteristics such as margins, tabs, print density
and pitch thus affecting the next user who does not neccesarily
want those choices of characteristics.
To prevent 1 user from affecting the next user, the printer must
be initialized to a default known state before printing the next
job. When the device open occurs on a type 32 device, the port
controller software writes an initialization character string to the
device. This string is determined by the currently active terminal
type.
The read trigger is used to tell the terminal device when it should
start to send characters to the HP 3000. In other words, it is a
method of preventing a device from sending input characters
before the HP 3000 is ready to accept them. Once the HP 3000
sends the read trigger character, input can proceed.
24
Special Characters:
Stripped Characters:
Terminal Control:
Vertical Formats:
XON/XOFF Protocol:
There are several characters which have special significance to
the terminal driver. These characters cause the driver to take
special actions. With the Workstation Configurator, you are able
to define the characters that cause each of the following special
actions: console attention, backspace, cancel, end-of -record and
subystem break.
With the Workstation Configurator, you are able to define a set
of characters which have no special function other than to be
removed from the input data. When these characters are typed,
they are ignored and do not show up in the data read. For
example, if the XON/XOFF flow control is not enabled, then one -
of the terminal type options allow you to specify that XON and
XOFF be stripped from input. if a subsystem break character is
entered when subsystem breaks are not enabled, the character
may be removed from the input stream. If the console attention
character is entered from a terminal which is not the console, it
may be ignored or treated as a data character.
There are several characteristics which allow you to have some
control over the terminal. With the Workstation Configurator
you are able to control each of the following terminal type
characteristics: Echo, Line feed during input, Formfeed during
output, backspace response and parity.
Many printers allow the use of Vertical Format Control (VFC).
VFC allows a programmer to instruct a printer to skip to
predetermined lines on page with certain carriage control
directives instead of counting and outputting a number of blank
lines.
With the Workstation Configurator, each VFC character sequence
(up to a maximum of 16 characters each) may be defined. When
one of the VFC carriage controls is used (4300 to 24317), the
driver generates the character sequence necessary to move the
printer carriage to the proper channel. For further information
on Vertical Format Control, refer to the "MPE V System
Operation and Resource Management Manual”,
In contrast to the other methods, this is controlled by the terminal
device. The driver sends data to the device in a continuous
stream. If the device can no longer accept data (because of being
put offline, filling its buffer, running out of paper, etc.), it sends
the XOFF character to the driver. The driver then stops sending
data to the device. When the device is able to accept data again,
it sends the XON character to the driver and the driver resumes
data transmission to the device.
With the Workstation Configurator, you can specify if a timer
should be started when the XOFF character is received. If a
timer is started and the timer expires before the XON character
is received, a message is printed on the console stating that the
device is offline. The timer duration can be specified from one to
255 seconds.
25
READER COMMENT SHEET
North American Response Centers
HP 3000 Application Note: Terminal Types for HP 3000 HPIB Computers
RC Questions £ Answers Index (Revised September 1, 1986)
We welcome your evaluation of this Application Note and attached RC Questions & Answers Index. Your
comments and suggestions help us to improve our publications. Please explain your answers under
Comments, below, and use additional pages if necessary.
AppNote RC Q&A Index
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arrangement and readability?
Comments and/or suggestions for future Application Notes:
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representative will ensure that your comments are forwarded.
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Application Note / RC Q € A Comments
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