System architecture for multiple input/output devices

摘要: A system or a board that interacts with processor and multi I/O devices such as high-speed facsimile modems. The inputs/outputs data to devices. Each device includes an indicator, Interrupt Request output, signify request the will output input data. If indicator signifies request, from within predetermined period Ti, in order prevent being lost. To this end, new timer periodically interrupts causes it execute interrupt service at T, where T<=Ti, whereupon detects indicators of devices, reads writes any signals request.