ZX8301
From Wikipedia, the free encyclopedia
The ZX8301 was a ULA integrated circuit designed for the Sinclair QL microcomputer. Also known as the "Master Chip", it provided a Video Display Generator, the division of a 15 MHz crystal to provide the 7.5 MHz system clock, ZX8302 register address decoder, DRAM refresh and bus controller. The ZX8301 was IC22 on the QL motherboard.