 Sharp eventually made an agreement with Rockwell International, which manufactured the QT-8D's LSI ICs for Sharp based on Sharp's logic designs.Each of the four LSI ICs contains the equivalent of about 700 to 900 transistors, and the ICs are named based on their functions.The NRD 2256 handles numerical read-in and display, converting keyboard scancodes into digit values and activating the various display tube segments based on digit values.