"The Modified Modular Jack is a small form-factor serial port connector developed by Digital Equipment Corporation. It uses a modified version of the 6P6C modular connector with the latch displaced off-center, so standard modular connectors found on Ethernet cables or phone jacks cannot accidentally be plugged in"
"Tweaked version that uses hacks to increase performance/playability. This can lessen accuracy of the emulator in exchange for increasing playability."