Eric F Macdonald

US Patent:

6557101, Apr 29, 2003

Filed:

Dec 22, 1999

Appl. No.:

09/470487

Inventors:

Eric MacDonald - Epping NH
Thomas Kong - Brookline MA
Paolo Forte - Belmont MA

Assignee:

Sycamore Networks, Inc. - Chelmsford MA

International Classification:

G06F 900

US Classification:

713100, 710302

Abstract:

A network device includes latches disposed between control outputs of control logic such as a field-programmable gate array (FPGA) and control inputs of functional elements through which network traffic flows. The control logic generates a latch enable signal that controls the operation of the latches. The latch enable signal is in a latching state to maintain the latches open during normal operation. During an upgrade, the control outputs may take on incorrect or indeterminate values, due to entering a high-impedance state. Therefore, during the upgrade the latches are closed, maintaining the pre-upgrade values on the inputs of the functional elements and preventing the control logic outputs from affecting operation of the device. After re-programming is complete and the control outputs are in a determinate state, the latches are re-opened. A pullup/pulldown circuit is used to maintain the latch enable signal in a latching state during the upgrade.

US Patent:

20090094039, Apr 9, 2009

Filed:

Oct 4, 2007

Appl. No.:

11/867109

Inventors:

Eric MacDonald - Exeter NH, US
Orion Reblitz-Richardson - Boston MA, US

Assignee:

Zhura Corporation - Boston MA

International Classification:

G06Q 10/00
G06F 15/16
G06F 3/048

US Classification:

705 1, 709201, 709205, 715716

Abstract:

Among other things, a publicly accessible online facility enables users to create finished rich media content (RMC) by collaboratively engaging in activities to create RMC portions related to the finished RMC, the RMC portions being made accessible to the users in different predefined levels of abstraction in which the finished RMC can be expressed.