PCI32 Emc Quad 10/100 Ethernet : which chip does it use? - Page 1
Forum section: electronics / general

author: legacy
author_rank: Super Contributor
timestamp: September 23, 2019, 09:49:27 pm
content: I am looking for something really small for an application and found the Emc Quad 10/100 Ethernet Scheda PCI P/N: 005045592, but it's unclear which chip it uses.Already googled and asked to severail surplus vendors without any useful info.does Anybod happen to know this card?(I do really prefer Tulip chipsDC21142DC21143but, they are hard to find)

author: mariush
author_rank: Super Contributor
timestamp: September 23, 2019, 10:49:48 pm
content: It looks to me like just 4 100mbps pci chips/controllers connected to a switch/muxer chipIf my eyes don't deceive me, they're Intel GD82559 :https://www.dexsilicium.com/intel_82559.pdfBig chip is intel 21152abhttps://assets.componentsense.com/images/pdfs/c41a14156387c6a55eac1fb0067f6b136002.pdfhe 21152 allows the two PCI buses to operate concurrently. This means that a master and a target on the same PCI bus can communicate while the other PCI bus is busy. This traffic isolation may increase system performance in applications such as multimedia.The 21152 makes it possible to extend a system’s load capability limit beyond that of a single PCI bus by allowing motherboard designers to add more PCI devices, or more PCI option card slots, than a single PCI bus can support.

author: mariush
author_rank: Super Contributor
timestamp: September 23, 2019, 11:06:49 pm
content: You should look into pci-x network cards. Most of them will work in regular PCI slots... so if you buy one cheap enough you could CUT the extra contacts in the edge connector to get it inside a regular PCI slot (if there's components blocking)ex 14 uk pounds for 4 port gigabit pci-x :https://www.ebay.co.uk/itm/intel-PRO-1000-GT-Quad-Port-PWLA8494GT-PCI-X-4-Port-1Gb-s-ethernet-card-GRA-56/401872612370seehttps://www.intel.com/content/www/us/en/support/articles/000007002/network-and-i-o/ethernet-products.htmlThe Intel® PRO/1000 MT Quad Port Server Adapter and theIntel® PRO/1000 GT Quad Port Server Adapterare designed to work in the following slot types:PCI-X* 133 MHzPCI-X 100 MHzPCI-X 66 MHzPCI* 64-bit 66 MHzPCI 64-bit 33 MHzPCI 32-bit 33 MHz (3.3 volt slots only)of course, pci 32bit will be 133 MB/s and 4 x 1gbps = 500 MB/s in total.

author: legacy
author_rank: Super Contributor
timestamp: September 24, 2019, 08:55:57 am
content: wow, you have excellent eyes! Thanks =)

author: legacy
author_rank: Super Contributor
timestamp: September 24, 2019, 09:08:10 am
content: Quote from: mariush on September 23, 2019, 11:06:49 pmyup, one more benefit is the 9K MTU it offers.The card needs to go in a ppc4xx system, whose PCI's bandwidth is limited to no more than 50Mbyte/sec, so this is not a problem concerning a PCI-X card downgraded to PCI, but I seriously need up to four 10/100 ethernet ports, and two of them must be able to serve two bootstrapping nodes.There is anything you can do to increase the speed with tftpboot, expect ... increasing the data_block, but since this protocol uses udp/ip it means the data_block limits is the MTU size.Say, 90Mbyte/sec to be served as fast as possible, and concurrently, an ethernet board with a large MTU (able to supply jumbo frames) can reduce the time required by tftpboot to transfer the file.The other two ports need to serve ssh slow connections.