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Modifying Extended FunctiorfcKeys
.
.' . .... . . '
The
IBM. 3'08
can recognize Ioi1gcharacter sequences (inore than 3) generated by
tilrininal keys
on
certain attached terminals. The Extended Key Sequence bit in the
Flags field enables this. function: Refer to "General Description Section" on
page 15.5. .
.
The character sequences which are recognized by the 3708 are hard-coded in the
3708. That is, you cannot define new keys with long sequences to the 3708. You
can, however, change those which are defined.
Long sequence keys are defined to the 3708 in the extended function key area,
addresses 118 to 12B, in the keyboard maps. For example, the following DEC®
Model VT220 keys (see page G-30) are recognized by the 3708 and can be changed.
F6
F7
F8
F9
FlO
Fll
F12
F13
F14
F15
F16
F17
F18
F19
F20
Find
Remove
Select
Prev Screen
Next Screen
To change a key's function, change that key's hex function number (see page 15-11)
in the extended function key area of the UDT.
For example, if you want the DEC® Model VT220 F6 to perform the PFI function
instead of the PF 13 function, change the hex function number from X' OC' (hex
function number for PF13) to X'OO' (hex function number for PFl) in the UDT at
address 118.
Notes:
1.
Keys that are not extended function keys can all be changed in the normal way.
2. The Insert key for the IBM 3151, 3161, 3162, 3163, and 3164, which transmits a
long sequence, is hard-coded in the 3708 and cannot be changed.
Using Predefined Terminal Tables
You can create a user-defined terminal table by using one of the predefined tables
provided in Appendix H, "Predefined User-Defined Terminal Tables and Keyboard
Mappings. "
To use a predefined terminal table, do the following:
1. Make a copy of the desired user definition in Appendix H, "Predefined
User-Defined Terminal Tables and Keyboard Mappings."
2. Assign a user-defined terminal ID (20-25) to the table and write the terminal ID
next to address 000000 on the copy.
3. Enter the table data using the procedure described under "Changing an Existing
Table" on page 15-18.
4. Complete the IBM 3708 Network Conversion Unit Reference Card for the
User-Defined Terminal, SX27-3654.
15-26
3708 Planning and Installation
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