The main board is responsible for taking inputs from the controller, loading game cartridge data, sending audio data to the speaker amplifier, and driving the LED displays. The silk screened chips include:

Nintendo '95 VUE-VPU, 9520KK023

Nintendo NVC-VUE, (C) NEC '91 '93 9520KX003

Nintendo VRM-VUE, 9508KU028

Toshiba TC511664BJ-80 128 KB of DRAM

Toshiba TC511632FL-70

Nintendo '95 VSU-VUE ATT, 9507A3014

Texas Instruments 57A5CXK, HCU04