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the number of possible values from 256 to 134. The 134 possible values have been divided between the fabric, FC_AL ports, and other special purposes as follows: AL_PA Quantity Purpose 00 1 FL (fabric) port 01-7E 126 NL (normal) ports F0 1 Used during LIP and ARB F7 1 Used during LIP F8 1 Used during LIP F9-FE 3 Reserved FF 1 Used for broadcasts in addition to the transfer of data, it is necessary for Fibre Channel communication to include some meta-data. This allows for the setting up of links, sequence management, and other control functions. The meta-data falls into two types, primitives which consist of a 4 character transmission word and non-data frames which are more complex structures. All primitives are four characters in length. They begin with the control character K28.5, followed by three data characters. In some primitives the three data characters are fixed, in others they can be varied to change the meaning or to act as parameters for the primitive. In some cases the last two parameter characters are identical. Parameters are shown in the table below in the form of their hexadecimal 8-bit values. This is clearer than their full 10-bit (Dxx.x) form as shown in the Fibre Channel standards: Mnemonic Meaning Parameters Comments ARB Arbitrate 94F0F0 Request fairness 94FFFF Fill word 94yyyy Request arbitration for AL_PA=yy CLS Close 85B5B5 Ends communication, cancelling previous OPN commands. DHD Dynamic Half-Duplex 8AB5B5 EOF End of frame See note 1 IDLE Idle 95B5B5 LIP Loop Initialization 15F7F7 Request AL_PA 15F7xx Reinitialise AL_PA=xx 15F8F7 Loop failure at unknown AL_PA 15F8xx Loop failure at AL_PA=xx 15FFxx Reset all, originating AL_PA=xx 15yyxx Reset AL_PA=yy, originating AL_PA=xx LPB Loop Port Bypass 09yyxx Bypass AL_PA=yy, originating AL_PA=xx 09FFxx Bypass all, originating AL_PA=xx LPE Loop Port Enable 05yyxx Enable AL_PA=yy, originating AL_PA=xx 05FFxx Enable all, originating AL_PA=xx LR Link Reset 49BF49 LRR Link Reset Response 35BF49 MRK Mark 5Fxxxx Vendor unique - clock sync, spindle sync etc. NOS Not Operational 55BF45 Link has failed OLS Offline 358A55 Going offline (due to received NOS or other event) OPN Open 91FFFF Open broadcast replicate (see note 2) 91yyFF Open selective replicate (see note 2) 91yyxx Open full duplex between AL_PA=xx and AL_PA=yy 91yyyy Open half duplex to AL_PA=yy R_RDY Receiver_Ready 954949 SOF Start of frame B5cccc See note 3 SYN Synchronise 7Fxxxx Clock Synchronization word X BFyyyy Clock Synchronization word Y DFzzzz Clock Synchronization word Z VC_RDY Virtual Circuit Ready F5vvvv Where vv is the virtual circuit ID Note 1: The first parameter byte of the EOF primitive can have one of four different values (8A, 95, AA, or B5). This is done so that the EOF primitive can rebalance the disparity of the whole frame. The remaining two parameter bytes define whether the frame is ending normally, terminating the transfer, or is to be aborted due to an error. Note 2: The Open selective replicate variant can be repeated a number of times in order to communicate with more than one destination port simultaneously. The Open broadcast replicate variant will allow communication with all ports simultaneously. Note 3: The SOF primitive contains a pair of control bytes (shown as cccc in the table) to designate the type of frame. MyGen Profile Generator

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Music:

Member Since: 18/10/2005
Band Members:
Influences: ODB (RIP), Radiohead, Cat Power, acid mothers temple, buddy holly, Ying Yang Twins, Electric Wizard, Fugazi.
Sounds Like: FILM CLIP FOR SAVING THE WORLDsearching and dying.
Record Label: CITYDIRT RECORDS
Type of Label: Indie

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