2031 Parts Location Part Number Description UB2 2016 2K x 8 bit static RAM (HP) U3B-U3E 2114 (4) 1K x 4 bit static RAM (LP) 901484-03 2364-107 ROM DOS 2.6 C000-DFFF 901484-05 2364-123 ROM DOS 2.6 E000-FFFF 6502 CPU 6522 (2) VIA drive Alps DFB111M25A (LP) drive Alps FDM2111-B2 (LP) drive Shugart 390 (HP)