Eight bit standard connector bus for sixteen bit microcomputer using mirrored memory boards
US4375665A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1980 |
| Grant date | Mar 1, 1983 |
| Priority date | — |
| Expiry date | Jul 14, 2000 |
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 memory boards is provided to cross-connect the Data In lines and Data Out lines for one memory board compared to another, these two memory boards being accessed by the same address. A processor board containing the microprocessor connects the Data In and Data Out lines to the data input/output terminals 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.