Northgate Omnikey 101 and CVT Avant Stellar: NKRO PS/2. PFU Happy Hacking Keyboard: 6KRO under USB. Can not be used with PS/2 adapter. Qpad MK-80 (Cherry blue): 6KRO with USB, NKRO with PS/2 adapter (included). Qpad MK-85 (Cherry red): 6KRO with USB. Can not be used with PS/2 adapter. Raptor Gaming K1: 6KRO under USB.

This is a hardware limitation of your keyboard. Uncharted drakefortune download in 1 gbu. Unfortunately, the only solution is that you must purchase a better keyboard that does not have this limitation.

To be more specific: In order to save money, keyboard manufacturers often put many keys on the same 'circuit' of sorts within the wiring of the keyboard. This prevents multiple keys in the same region of the keyboard from being pressed simultaneously.

Sometimes it even prevents more than 2 keys at all from across the whole keyboard being pressed at once. Often the shift, ctrl, and alt keys are not within this limitation, so you can hold shift and press 2 other keys at once and it will still work fine. Even high-end gaming keyboards often have a similar hardware limitation, although the cap is much higher so that it is unlikely to be reached during the normal course of gaming. @Raven: The term you're looking for is called. Most cheaper keyboards are 2KRO (2-key rollover), meaning any two keys can be held down at once and still be detected (though most of them have 3- or 4-key rollover for most of the common key-combinations for games, like keys near W-A-S-D).

The maximum possible through USB is 6KRO. Through PS/2 port there is no limit; keyboards which support any number of simultaneous keypresses are called (n-key rollover). Check the specs when buying a keyboard to find out its rollover. – Jun 5 '12 at 22:23.

The keyboard enthusiasts forum at has an extensive (login required) tested for their N-Key-Rollover capabilities, as well as instructions on how to find the number of simultaneous keypresses a certain keyboard supports. X-key-Rollover (where X is an integer smaller than the number of physical keys) is the minimum number of keys that will register correctly under any circumstances. True N-key-Rollover (NKRO) means that all keys can be held down and register correctly. Most standard keyboards offer only 2KRO, and although it is possible that certain key combinations allow more keys to register simultaneously, this is not guaranteed, and may differ even between different revisions of the same keyboard. Here's a list of keyboards having a confirmed NKRO over a PS/2 connection or 6KRO/18KRO over USB (which is a USB limitation) from the geekhack.org (login required) (June 5th, 2012): Adesso MKB-125B: 6KRO with USB cable adapter, NKRO with PS/2. Adesso MKB-135B (full sized): 6KRO with USB cable adapter, NKRO with PS/2. Cherry G80-3494 (Cherry Red): 6KRO with USB, NKRO with PS/2 adapter.

Cherry G80-3600 (Cherry Red): 6KRO with USB, NKRO with PS/2 adapter. Cherry Corp G80-8200lpdus: NKRO PS/2. Cherry G80-1950PQAXB.