SK1871 - Keyboard Encoder (ASCII/HEX)
SK1872 - High-Speed 8-Bit Inp. Port, 1 Acitve Lo, 1 Active hi Select
SK1874 - High-Speed 8-Bit Input Port
SK1875 - High-Speed 8-Bit Output Port
SK1876 - Video Interface System (VIS) W/RGB Bond-Out Option
SK1877 - Programmable Interrupt Controller (PIC)
SK1878 - Dual Counter-Timer
SK1879 - Real-Time Clock
SK1881 - Latch & Memory Decoder Interface W/MWR & MRD
SK1882 - Latch & Memory Decoder Interface