C128/C128D Parts Location Part Number Description U19 2016 2K x 8 static RAM U38-U53 4164 (16) 64K x 1 dynamic RAM (C128) U38-U41 41464 (4) 64K x 4 dynamic RAM (C128D) U23, U25 4416 (2) 16K x 4 dynamic RAM U1, U4 6526 (2) CIA U5 6581 SID (C128) U5 8580 SID (C128D) U10 Z80 CPU U6 8502 CPU U22 8563 CRTC U21 8564 VIC (NTSC) U21 8566 VIC (PAL) U28 8701 CLK GEN U11 315012-01 8721R3 48 pin PLA U7 310389-01 8722 MMU U18 315079-01 2364-320 ROM character DIN U18 325173-01 2764 ROM character Swiss U18 325181-01 2764 ROM character Swedish/Finnish U18 390059-01 2364-318 ROM character US U32 251913-01 23128-045 ROM Basic 2r2 U33 318018-02 23128-049 ROM Basic 7.0 4000-7FFF U34 318022-01 23256 ROM Basic 7.0 4000-BFFF U34 318019-02 23128-050 ROM Basic 7.0 8000-BFFF U35 318020-03 23128-051 ROM Basic 7.0 C000-FFFF U35 315078-01 23128-053 ROM Basic 7.0 C000-FFFF DIN U32 318023-01 23256 ROM Basic 2r2, 7.0 C000-FFFF U33 318018-04 23128 ROM Basic 7.0r 4000-7FFF U34 318022-02 23256 ROM Basic 7.0r 4000-BFFF U34 318019-04 23128 ROM Basic 7.0r 8000-BFFF U35 318020-05 23128 ROM Basic 7.0r C000-FFFF U32 318023-02 23256 ROM Basic 2r2, 7.0r C000-FFFF U32 318077-01 27256 ROM Basic 2r2 US, 7.0r C000-FFFF DIN U32 318081-01 27256 ROM Basic 2r2 US, 7.0r C000-FFFF Swiss U32 318084-01 27256 ROM Basic 2r2, 7.0r C000-FFFF Swedish