Data processing system with unified I/O control and adapted for

Details Data processing system with unified I/O control and adapted for Data processing system with unified I/O control and adapted for

1984-06-25

1988-07-12

Williams, Archie E.

Boots, shoes, and leggings

364521, G06F 1312

Patent

active

047574437

ABSTRACT:
A data processing system which includes a central processing unit (CPU) to which is connected an I/O bus and a memory bus is disclosed. The data processing system further includes an I/O controller and a video control section. The I/O controller includes a terminal control section which is connected to the CPU through an RS232 Cable, an I/O control section which is connected to the I/O bus over a single line and a single processor for managing both the terminal control section and the I/O control section. The I/O control section includes a plurality of interface and control subsystems each for use with a separate peripheral device and an I/O bus interface and control subsystem. The terminal control section includes a video control section interface through which data is sent directly to the video control section over a separate line, and a keyboard interface for interfacing the terminal control section to a keyboard. The video control section includes a video memory and a microprocessor which are both connected to the memory bus.

REFERENCES:
patent: 3956739 (1976-05-01), Ophir et al.
patent: 4103331 (1978-07-01), Thacker
patent: 4245300 (1981-01-01), Kaufman et al.
patent: 4296466 (1981-10-01), Guyer et al.
patent: 4365294 (1982-12-01), Stokken

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