Boots – shoes – and leggings
Patent
1992-07-02
1995-05-02
Lee, Thomas C.
Boots, shoes, and leggings
395200, 395275, 364DIG1, 364239, 364DIG2, 36494061, 36494062, C06F 1300, C06F 1338
Patent
active
054127823
ABSTRACT:
In a Local Area Network (LAN) system, an ethernet adapter exchanges data with a host through programmed I/O (PIO) and FIFO buffers. The receive PIO employs a DMA ring buffer backup so incoming packets can be copied directly into host memory when the PIO FIFO buffer is full. The adapter may be programmed to generate early receive interrupts when only a portion of a packet has been received from the network, so as to decrease latency. The adapter may also be programmed to generate a second early interrupt so that the copying of a large packet to the host may overlap reception of the packet end. The adapter may also be programmed to begin packet transmission before the packet is completely transferred from the host to the adapter, which further reduces latency. The minimal latency of the adapter allows it to employ receive and transmit FIFO buffers which are small enough to be contained within RAM internal to an Application Specific Integrated Circuit (ASIC) containing the transceiver, ethernet controller, FIFO control circuitry and the host interface as well.
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patent: 4768190 (1988-08-01), Giancarlo
patent: 4860193 (1989-08-01), Bentley et al.
patent: 5121479 (1992-06-01), O'Brien
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Anzilotti, et al. "Implementing a Non-Buffered Slave Ethernet Adapter Using the Intel 82592," Sep. 1989, Intel Data Communications Focus Group.
Connery Glenn W.
Hausman Richard
Reid Richard S.
Rivers James P.
Sherer Paul W.
3Com Corporation
Allen Kenneth R.
Dinh D.
LeBlanc Stephen J.
Lee Thomas C.
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