This is 00111100, the answer. The MK-61 has a lot of unusual keys, many related to programming. To gain an understanding of this keyboard, study the chart above and visit Greg Escov's detailed Description of the MK-61 Keyboard . As stated, the MK-61 has 105 program steps. In programming mode, the display shows four two-digit numbers.
Programs run from low numbers to high, therefore on the display from right to left.
This takes you to memory location 00, where you will start programming. That is it. Many books and magazines presented programs for the MK-61 and equivalent machines, and games were especially popular. That mode seems ideally suited for the creation of strange hexadecimal strings. The original authors retain the copyright of this material.