公开(公告)号：CA1066812A

公开(公告)日：1979-11-20

申请号：CA252273

申请日：1976-05-11

Applicant: IBM

Inventor： CROSS JON L ,  HOMAN MERLE E ,  MACHOL GUENTHER K ,  MALM RICHARD L ,  SVELUND LARRY E

IPC: G06F7/00 ,  G06F11/00 ,  G06F13/00 ,  G06F13/42 ,  H04B10/00 ,  G06F9/16

Abstract: APPARATUS FOR CONTROL AND DATA TRANSFER BETWEEN A SERIAL DATA TRANSMISSION MEDIUM AND A PLURALITY OF DEVICES Apparatus under microprocessor control for use in communicating over a serial communication loop with a remote attached control unit. It is capable of establishing frame synchronization, interpreting commands, assembling data and transmitting bits on the loop. The apparatus also communicates with I/O devices over a demand/response interface. A microprocessor interface with the loop includes loop sync control which establishes bit synchronization and generates a restart pulse at bit receive time and bit send time. The execution of instructions by the microprocessor is stopped and the microprocessor enters a wait state when it has finished all previous work and is ready to receive a loop bit. When it is time to receive the loop bit the microprocessor is restarted in response to the restart pulse from the loop synchronization. or output operations to a device, the microprocessor loads the device address and a device command or data into shift registers and initiates the transfer by setting a latch. When the transfer to the device is completed, this latch is reset in response to a signal from the device.

公开(公告)号：CA2024278A1

公开(公告)日：1991-03-21

申请号：CA2024278

申请日：1990-08-30

Applicant: IBM

Inventor： MALM RICHARD L ,  MEILEY CHARLES L

IPC: G09G5/00 ,  G06F3/023 ,  G06F3/048 ,  G06F17/50 ,  G09G5/36 ,  G06F15/56

Abstract: SA9-89-070 An improved technique for processing large amounts of information and displaying that information graphically. The graphic display focuses attention to suspect areas employing colors and shading techniques to quickly focus the user's attention to problem areas. Multidimensional objects clearly convey global information concerning circuits employing millions of networks of electrical characteristics.

公开(公告)号：FR2311355A1

公开(公告)日：1976-12-10

申请号：FR7610913

申请日：1976-04-09

Applicant: IBM

Inventor： CROSS JON L ,  HOMAN MERLE E ,  MACHOL GUENTHER K ,  MALM RICHARD L ,  SVELUND LARRY E

IPC: G06F7/00 ,  G06F11/00 ,  G06F13/00 ,  G06F13/42 ,  H04B10/00 ,  G06F3/04