Can someone tell me whether AMD's TAXI chips (AM7968 & AM7969) are specifically for transferring video over fiber or are they generic data transfer chips? There's these boxes which take composit video in and send data out over fiber using those chips.  I'm wondering if they're specifically for video or if there's more protocal I have to know before being able to interface to them.

This e-mail address is being protected from spam bots, you need JavaScript enabled to view it (Joseph H Allen) writes: )Can someone tell me whether AMD's TAXI chips (AM7968 & AM7969) are )specifically for transferring video over fiber or are they generic data )transfer chips? There's these boxes which take composit video in and send )data out over fiber using those chips.  I'm wondering if they're specifically )for video or if there's more protocal I have to know before being able to )interface to them. The TAXI chips are for FDDI, a high speed data _link_.

I'm looking for a complete set of schematics for my Zenith Turbosport 386e Laptop.  I called a couple of sources for them and they want $150-$175 for the set (kinda expensive if you asked me)  Does anyone know of a source for these who charges less?? thanks! aaron

This e-mail address is being protected from spam bots, you need JavaScript enabled to view it (Joseph H Allen) writes: )Can someone tell me whether AMD's TAXI chips (AM7968 & AM7969) are )specifically for transferring video over fiber or are they generic data )transfer chips? There's these boxes which take composit video in and send )data out over fiber using those chips.  I'm wondering if they're specifically )for video or if there's more protocal I have to know before being able to )interface to them. The TAXI chips are for FDDI, a high speed data _link_. They can use 5B/4B encoding/decoding and can run at 100Mbps just like FDDI but TAXIchips are simpler devices.  You can think of a xmtr/rcvr pair as a `parallel' register, that is parallel loaded on one side and output on the other, except that the two sides are separated by a serial _link_.  You can use them to send 8 to 10 bits of data and 4 to 2 bits of command across a serial _link_.          +

Can someone tell me whether AMD's TAXI chips (AM7968 & AM7969) are specifically for transferring video over fiber or are they generic data transfer chips? There's these boxes which take composit video in and send data out over fiber using those chips.  I'm wondering if they're specifically for video or if there's more protocal I have to know before being able to interface to them. This pair of chips is designed to perform the job of accepting a parallel byte, serializing using the ANSI X3T9.5 (FDDI) symbol set (including control signals), and reconstructing the parallel bytes at the receiver in the same order at the output. AMD likens the pair to an 8-bit register with handshake at the input and a fixed propagation delay through it. They are superb! Their transmission rate, set by a crystal, can be from 40 to 125 Mbits/sec (for the -125 part). Wider buses may be multiplexed simply. The ECL-differential serial connections will drive 50-90 ohm cable directly or will interface to fiber-optic transmitters/receivers directly. The connection can be AC-coupled for isolation (if needed) because the symbol set used has an average DC value of zero. I am using them in a 24-bit-wide pulse-doppler radar telemetry _link_ by using their suggested scheme for multiplexing and demultiplexing. The result works very well (the word that comes to my mind is bulletproof ) and I am quite impressed. I should add that I am in no way connected with AMD except as a satisfied customer. You can call their Hotline at 800-222-9323 and order the TAXIchip handbook. It provides the data sheet and much application information. Marshall Jose This e-mail address is being protected from spam bots, you need JavaScript enabled to view it