Eight-Bit to Sixteen-Bit Memory Converter
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02
A technique is described whereby a computer circuit provides a means of enabling a sixteen-bit microprocessor to execute programs directly from an eight-bit-wide memory array. The concept uses a sixteen-bit to eight-bit memory converter to convert a single standard eight-bit wide memory array so that it appears to be sixteen-bits wide. This enables sixteen-bit microprocessors to utilize inexpensive eight-bit memory devices and also reduces the amount of circuitry which would normally be required for sixteen-bit arrays. The technique used also enables circuitry to be implemented utilizing left-over logic already existing on circuit cards. (Image Omitted) The basic design of the sixteen- to eight-bit memory converter is shown in Fig. 1. The converter 10 consists of control logic unit 11, latch 12 and tri-state driver 13.