Adapter for attaching I/O devices to I/O communications with alt

Details Adapter for attaching I/O devices to I/O communications with alt Adapter for attaching I/O devices to I/O communications with alt

1988-01-07

1990-09-25

Anderson, Lawrence E.

Boots, shoes, and leggings

364239, 3642392, 3642373, G06F 1300, G06F 1562

Patent

active

049597736

ABSTRACT:
A circuit arrangement (adapter) for attaching a display device to a serial I/O channel is disclosed. The circuit arrangement captures a serial message of indeterminate length and places said message unit into a refresh RAM in a synchronous manner during non-display periods. The circuit arrangement includes a microprocessor whose address and data buses are coupled to a microprocessor RAM and through control circuitry to the address and data buses of a refresh RAM. Data is transferred at high speed from the serial I/O channel to the microprocessor RAM. When the microprocessor executes a read command, the microprocessor RAM is placed in a "read mode" while the refresh RAM is placed in a "write" mode. Data at the address selected in the microprocessor RAM is transferred to an identical address in the refresh RAM. Similarly, data can be transferred from the refresh RAM into the microprocessor RAM. Thus, the execution of a single command at a single address results in the selection of two RAMs.

REFERENCES:
patent: 3774161 (1973-11-01), Chambers
patent: 4023142 (1977-05-01), Woessner
patent: 4075695 (1978-02-01), Lelke
patent: 4232376 (1980-11-01), Dion et al.
patent: 4322812 (1982-03-01), Davis et al.
patent: 4398265 (1983-04-01), Puhl
patent: 4513390 (1985-04-01), Walter
patent: 4559620 (1985-12-01), Blair
patent: 4573115 (1986-02-01), Halgrimson
patent: 4574358 (1986-03-01), Peterson
patent: 4575803 (1986-03-01), Moore
patent: 4608688 (1986-08-01), Hansen et al.
patent: 4656596 (1987-04-01), Thaden et al.

Affiliated with

Also associated with

Rating

Adapter for attaching I/O devices to I/O communications with alt does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adapter for attaching I/O devices to I/O communications with alt, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adapter for attaching I/O devices to I/O communications with alt will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-332670