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AS/400 - Emulatore di Terminale
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Changing Keymappings
While it is difficult to map all functions of the 5250 to VT, there are some correlations as shown below. Some of the typcial key maps are:
ATTN = Ctl + ARESET = Ctl + R
Back Tab = <Esc> TABHELP = Ctl + ?
New Line = <Esc> Line FeedPRINT = Ctl + P
System Request = Ctl + C or <Esc> SPage Down (Roll Up) = Ctl + D
Page Up (Roll Down) = Ctl + UF1 to F12 = <Esc> 1 .... 10
F13 to 24 = <Esc> Shift + 1 .... 10

Additional 5250 to VT keymaps:
   5250 Function              VT Key(s)
   5250 Attention . . . :   *CTLA      *ESCA
   5250 Help  . . . . . :   *CTLQST    *ESCH
   Page Down (Roll Up)  :   *CTLD      *CTLF      *NXTSCR
   Page Up (Roll Down)  :   *CTLB      *CTLU      *PRVSCR
   System Request . . . :   *CTLC      *ESCS
   Insert . . . . . . . :   *ESCI      *ESCDLT    *INS
   Delete . . . . . . . :   *DLT       *RMV
   Enter  . . . . . . . :   *RETURN
   Backspace  . . . . . :   *BACKSPC
   Duplicate  . . . . . :   *ESCD
   Erase Input  . . . . :   *CTLE
   Error Reset  . . . . :   *CTLR      *ESCR
   Field Exit . . . . . :   *CTLK      *CTLX      *ESCX
   Field Minus  . . . . :   *ESCM
   Home . . . . . . . . :   *CTLO
   New Line . . . . . . :   *ESCLF
   Print  . . . . . . . :   *CTLP      *ESCP
   Field Advance  . . . :   *TAB
   Field Backspace  . . :   *ESCTAB
   Cursor Up  . . . . . :   *CSRUP
   Cursor Down  . . . . :   *CSRDOWN
   Cursor Left  . . . . :   *CSRLEFT
   Cursor Right . . . . :   *CSRRIGH
   Clear Screen . . . . :   *ESCC
   Test Request . . . . :   *CTLT
   Toggle Indicator
     Lights . . . . . . :   *ESCT
   Redraw Screen  . . . :   *CTLL      *ESCL
   F1 . . . . . . . . . :   *ESC1      *PF1       *F1
   F2 . . . . . . . . . :   *ESC2      *PF2       *F2
   F3 . . . . . . . . . :   *ESC3      *PF3       *F3
   F4 . . . . . . . . . :   *ESC4      *PF4       *F4
   F5 . . . . . . . . . :   *ESC5      *F5
   F6 . . . . . . . . . :   *ESC6      *F6
   F7 . . . . . . . . . :   *ESC7      *F7
   F8 . . . . . . . . . :   *ESC8      *F8
   F9 . . . . . . . . . :   *ESC9      *F9
   F10  . . . . . . . . :   *ESC0      *F10
   F11  . . . . . . . . :   *ESCMINUS  *F11
   F12  . . . . . . . . :   *ESCEQ     *F12
   F13  . . . . . . . . :   *ESCEXCL   *F13
   F14  . . . . . . . . :   *ESCAT     *F14
   F15  . . . . . . . . :   *ESCPOUND  *F15
   F16  . . . . . . . . :   *ESCDOLLAR *F16
   F17  . . . . . . . . :   *ESCPCT    *F17
   F18  . . . . . . . . :   *ESCCFX    *F18
   F19  . . . . . . . . :   *ESCAMP    *F19
   F20  . . . . . . . . :   *ESCAST    *F20
   F21  . . . . . . . . :   *ESCLPAR
   F22  . . . . . . . . :   *ESCRPAR
   F23  . . . . . . . . :   *ESCUS
   F24  . . . . . . . . :   *ESCPLUS
For TELNET clients accessing the AS/400, you can also use the DSPVTMAP command for VT-style connections to view the keyboard map. The corresponding command to change the keyboard map is CHGVTMAP. This allows you to remap what the host application will receive for certain function keys.
AS/400 Telnet
The following are some TCP/IP and telnet hints when experiencing problems connecting to an AS/400.
TELNET users are not able to log back on once they have logged off
PTF SF23661 must be installed on your system. This is included with the AS/400 C5192310 cumulative package. Use the following command to see if it is installed. If this is not installed, request it and install it.
DSPPTF LICPGM(5763SS1) SELECT(SF23661)
QINTER subsystem is not active
If the QINTER subsystem is not active, attempts to telnet to your AS/400 system will fail. If the controlling subsystem is QCTL, check to make sure that subsystem QINTER is active.
User class of *SECOFR cannot log on
Check that that system value QLMTSECOFR is set to "0=Explicit device access not needed". If it is set to "1=Explicit device access needed", users who have *SECOFR authority are not allowed to log on to the AS/400 system using TELNET.
The system value QAUTOVRT is set to a value that is too small
When you attempt to TELNET to an AS/400 system, the TELNET server assigns your job to the next free virtual workstation. If there are no virtual workstation devices available, then the TELNET server will attempt to automatically configure one. This can only be done if the value QAUTOVRT is set correctly.
Use the Change System Value (CHGSYSVAL) command to change the value of the QAUTOVRT. For example, entering the following command string changes the number of virtual devices to 50. This allows up to 50 users to sign on simultaneously using TELNET.
CHGSYSVAL SYSVAL(QAUTOVRT) VALUE(50)
Passthrough Printing on AS/400
Most of what IBM considers passthrough printing deals with the use of LPR / LPD (remote printing protocol). Passthrough printing in the TELNET environment envolves printing to a local PC printer through the telnet session by sending a "transparent print on" code, the data, and ending with a "transparent print off" code.
In order to do passthrough printing on an AS/400 several things must work together. First, the particular terminal type you are running at the host end must support passthrough printing. Second, the terminal emulator you are running must support passthrough printing (Anzio products do). And third, the host application must allow for passthrough printing as an option to doing printouts (you can get around this by printing to a file and using a shell script to handle the passthrough printing, see our shell script examples in our A Guide to Passthrough Printing document).
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