C16 & PLUS/4 Parts Plus 4 C16 Location Location Part Number Description U11-U18 4164-2 (8) 64K x 1 dynamic RAM U5, U6 4416 (2) 16K x 4 dynamic RAM U5 6529B SPI U27 U13 6529B SPI U3 6551A ACIA U1 U1 7360/8360 TED U2 U2 7501/8501 CPU U19 U16 251641-02 7700-010/82S100 PLA U25 317053-01 23128 ROM 3-PLUS-1 8000-BFFF U26 317054-01 23128 ROM 3-PLUS-1 C000-FFFF U26 16K ROM 3-PLUS-1r C000-FFFF U24 U4 318005-04 23128 ROM Kernal 3.5 C000-FFFF U24 U4 318005-05 23128 ROM Kernal 3.5r C000-FFFF U23 U3 318006-01 23128 ROM Basic 3.5 8000-BFFF