1570 Parts Location Part Number Description 315090-01 32K ROM DOS 3.0 drive Alps 1571 Parts Location Part Number Description U11 WD1770 FDC U11 WD1772 FDC U3 2016-20 2K x 8 bit Static RAM U1 6502A CPU U4, U9 65C22A (2) CIA U20 6526A CIA U20 8520 CIA U6 251828-01 64H156 40 pin Gate Array U5 251829-01 64H157 20 pin Gate Array U7 251853-01 R/W Hybrid U2 310654-03 23256 ROM DOS 3.0 U2 310654-05 32K ROM DOS 3.0 rev. drive Alps drive Newtronics D502 C128D Parts Location Part Number Description U103 2016-20 2K x 8 bit Static RAM U108 252308-01 MC2871A R/W Amp. U107 252371-01 MOS5710 FDC and Gate Array U101 6502A CPU U104, U106 65C22 (2) CIA U105 251828-01 64H156 40 pin Gate Array U102 318047-01 23256 ROM DOS 3.1 drive Newtronics D502