Motherboard#4512 (Siemens Nixdorf System Board D823) has been associated to Chip#5669 ((multiple brand) 75185 / 75232 (RS-232 Driver/Receiver) [ST75185C, GD75232, SN75185, DS14185, GD75232, AZ75232, M5232, W83778S, HT6571, AP232, GD75232]) by helencroft

Motherboard#4512 (Siemens Nixdorf System Board D823) has been associated to Chip#558 ((multiple brand) 8042 (Keyboard Controller) [VT82C42, W83C42, AMIKEY™-2, HT6542, KYBD, LT38C41, N8242PC, MR BIOS, 6042A]) by helencroft