awaiting keyboard input; the keystrokes are not displayed upon the screen until they are used. Up to 200 keystrokes may be accumulated, which is far more than most systems allow. Experienced users can alter this value to virtually any desired level using the new_cbuf system call. Keyboard failure The Applix 1616 is designed to work with any IBM XT compatible keyboard with a 5 pin DIN connector. Applix can supply a suitable keyboard, but in these days oflowprices,manyusersprefertoobtaintheirown. Unfortunately,suchkeyboards do differ somewhat from brand to brand, so sometimes a new user encounters a keyboard problem.
If your keyboard does not work (does not type anything, or types the wrong thing), make the following checks. Check that the small switch (if available) underneath the keyboard is set to XT mode. The Applix does not use IBM AT or IBM PS/2 style keyboards. Power down the entire system for about 20 seconds after moving the switch, to allow the keyboard to reset correctly. There is a small set of two pins labelled KB at the front left hand side of the Applix motherboard. ThesecanbeusedtoadjusttheApplixtosomeoftheknowndifferent styles of XT keyboard. Switch off the Applix and remove the cover. If a small plastic jumper block is in place shorting out the two pins, remove it!
If there is no jumper block, install one (or short out the two KB pins with wire). Try the keyboard again. Try a different keyboard, if you have one readily available, or can easily borrow one. This tests that the Applix 1616 keyboard circuit is working. Ifyou arestill havingkeyboard problems, contactApplix direct for additionalhelp. Note that you will not be able to use an IBM AT only keyboard, you do need an older style IBM XT keyboard. A keyboard with an "automatic" AT/XT switch is also not likely to work (they are designed for specific IBM clone systems). Applix can always supply a keyboard that is guaranteed to work, if you can not easily locate one yourself.
Cursor keys and numeric keypad The keypad on the far right-hand side of your keyboard has two modes. One is as a cursor control pad ( Num Lock light off) and the other is as a numeric keypad ( Num Lock light on). You may switch between the two modes by pressing the key. When the keyboard’s numeric pad is in its cursor control mode, the 1616/OS key- board driver produces the appropriate control codes for the line and screen editors. In short, you can move the cursor about the display. Num Lock Page 16 User Tutorial Manual First Steps