Using TinyTERM 3.3 with IBM3151 emulation, the numeric keypad may fail. When that happens, copy and paste the following to the end of your .tap file:

[keyboard]
country=United States
;name=ibm3151-13
;[IBM 3151-13]
<^C>=<ABORT>
<^E>=<^E>
<C-RIGHT>=<SCRRIGHT>
<C-LEFT>=<SCRLEFT>
<C-PGUP>=<SCRPGUP>
<C-PGDN>=<SCRPGDN>
<C-UP>=<SCRLINEUP>
<C-DOWN>=<SCRLINEDN>
<F1>=<ESC>a<^M>
<F2>=<ESC>b<^M>
<F3>=<ESC>c<^M>
<F4>=<ESC>d<^M>
<F5>=<ESC>e<^M>
<F6>=<ESC>f<^M>
<F7>=<ESC>g<^M>
<F8>=<ESC>h<^M>
<F9>=<ESC>i<^M>
<F10>=<ESC>j<^M>
<F11>=<ESC>k<^M>
<F12>=<ESC>l<^M>
<SF1>=<ESC>!a<^M>
<SF2>=<ESC>!b<^M>
<SF3>=<ESC>!c<^M>
<SF4>=<ESC>!d<^M>
<SF5>=<ESC>!e<^M>
<SF6>=<ESC>!f<^M>
<SF7>=<ESC>!g<^M>
<SF8>=<ESC>!h<^M>
<SF9>=<ESC>!i<^M>
<SF10>=<ESC>!j<^M>
<SF11>=<ESC>!k<^M>
<SF12>=<ESC>!l<^M>
<CSF1>=<ESC>”a<^M>
<CSF2>=<ESC>”b<^M>
<CSF3>=<ESC>”c<^M>
<CSF4>=<ESC>”d<^M>
<CSF5>=<ESC>”e<^M>
<CSF6>=<ESC>”f<^M>
<CSF7>=<ESC>”g<^M>
<CSF8>=<ESC>”h<^M>
<CSF9>=<ESC>”i<^M>
<CSF10>=<ESC>”j<^M>
<CSF11>=<ESC>”k<^M>
<CSF12>=<ESC>”l<^M>
<KP0>=0
<KP.>=.
<KP1>=1
<KP2>=2
<KP3>=3
<KP4>=4
<KP5>=5
<KP6>=6
<KP7>=7
<KP8>=8
<KP9>=9
<KP/>=/
<KP*>=*
<KP->=-
<KP+>=+
<KPENTER>=<^M>
<NUMLOCK>=<NUMLOCK>
<AF1>=<MENU>
<AF2>=<HELP>
<AF3>=<GOLD>
<AF4>=<SHELL>
<AF5>=<CAPTURE>
<AF6>=<PRINT>
<AF9>=<COMPOSE>
<AF10>=<NEXTSESS>
<ALTB>=<BREAK>
<ALTT>=<SCANMODE>

When this happens, check the Line Turnaround Character (LTA) in the emulation setup. It should be set to 13 normally, the ASCII value of a carriage return (CR). If it’s set incorrectly, or not set at all, then the function keys will not work.

In the Session Properties for TinyTERM version 4.x, on the Session tab, there is a Setup button for the terminal emulation type. Clicking that brings up the “Emulation Setup” dialog.

The first line in that dialog is “IBM 3101/3151 turn around character.” In most cases this should be set to 13 (the ASCII value of the carriage return character) for the function keys in the IBM3151 emulation to work correctly.

TinyTERM version 4.04 will only accept a single digit in this field. To set it properly, you will need to edit your .tpx file manually, using Notepad or another text editor. Search for the line:

TurnChar=

Edit that to add the number 13 to the end of the line:

TurnChar=13

Save the changes and exit. If you open the “Emulation Setup” dialog after this and save any changes, you will need to make this manual edit again.