CPU: Toshiba T84C00, Z80 clone. Mfg week of 4 April 1993.
ASIC: Toshiba TC14L010AF, 1000-gate array. Mfg week of 25 April 1993.
ROM: Sharp LH5359, 64KB Mask ROM, TI-81 ROM V2.00. Mfg week of 20 June 1993.
RAM: Sharp LH5160N, 8KB SRAM. Mfg week of 21 February 1993.

Mainboard is identical to that of a TI-82, except the RAM/ROM chips and missing link hardware.