Dual-Ported RAM Controller

During the beginning of the 80X86 era of the early 1980s, dual-port random access memory (RAM) controller chips, such as the Intel 8207, were marketed in large quantities. As the name implies, these semiconductor devices arbitrate RAM requests from the central processing unit (CPU) and other devices such as a math coprocessor in a personal computer, electronic game console, hand-held device, or other processor-controlled hardware.