THOMAS N LEWIS, MD
Anesthesiologist Assistant at Peachtree Rd, Atlanta, GA

5388250, Feb 7, 1995

Aug 24, 1993

8/111034

Thomas F. Lewis - Fort Lauderdale FL
Stephen P. Thompson - Delray Beach FL

International Business Machines Corporation - Armonk NY

G06F 1310, G06F 1342

395550

An interface between a central processing unit (CPU) and a peripheral device is provided which ensures compatibility between existing software for the peripheral device and a CPU of any speed. The interface waveshapes read or write strobe signals in a transfer cycle between the peripheral device and the CPU in order to ensure timing parameters of the peripheral device are not violated by fast CPUs. If the waveshaping causes a change in the timing between first and second consecutive read or write strobe signals, the interface provides a wait signal to the CPU for the purpose of instructing it to extend the transfer cycle of the second strobe signal. In the illustrated embodiment, an interface according to the invention is part of a video interface connecting a microprocessor unit (MPU) and a video digital-to-analog converter (video DAC). Writing or reading color data to or from the video DAC occurs by way of the interface of the invention. The MPU is slowed while it writes or reads color data only when it is required to prevent violation of the timing parameters of the video DAC.

4165096, Aug 21, 1979

Mar 20, 1978

5/888235

Thomas J. Lewis - Atlanta GA
Lester S. Hardwick - Atlanta GA

B62D 2118

280641

A foldable, storable utility trailer, said trailer having a pair of retractable wheels, a foldable tow bar, and a removable cover which also serves as a storage receptacle when the trailer is not in use. The trailer is constructed in a simple manner so as to provide compactness, ease of operation, and reliability.