ocr: Keyboard connection Expansion card Power slots connection Back up pattery 16-bit slots, found on :286, '386 and '486 machines. switches ROM sockets, - - - - - - - - - - - - - - - II - I . Eiit - DIP (only PC/XID I - I BIOS chip C. P. U. RAM chips, lotal SEGE ili Coprocessor socket - - speaker iming crystal connection (Compos ite based on various hotherboards)