Sixteen bit microcomputer memory boards for use with eight bit standard connector bus
US4163289A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 1, 1978 |
| Grant date | Jul 31, 1979 |
| Priority date | — |
| Expiry date | May 1, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4018
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A microcomputer system uses a standardized S-100 bus with eight bit Data In and eight bit Data Out lines, but has a sixteen bit microprocessor with sixteen bit bidirectional data input/output terminals. An arrangement of mirror image pairs of eight bit wide memory arrays on a single memory board are used, with means to cross-connect the Data In lines and Data Out lines for one memory array compared to another, these two memory arrays being accessed by the same address. A processor board containing the microprocessor chip connects the Data In and Data Out lines to the input/output terminals of the microprocessor by controllable unidirectional buffers which criss-cross the bytes on write compared to read operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.