Exogam VXI crate Infrastructure Specification.

The infrastructure of a VXI crate consists of three items. The 'D' size crate and power supply, the Slot 0 Resource manager, and the VRE (VXI Readout Engine).

The 'D' size crate.

The crate must be to the following minimum specification as defined by I.H.Lazarus.

Purchase a Wiener crate from Plein & Baus GmbH.

      1. 100 amps for each of +5v, -5.2v, -2v ( it is acceptable if 200 amps is specified for one or more of these voltages)
      2. 40 amps for each of +12v, -12v.
      3. 20 amps for each of +24v, -24v

Contacts: http://www.wiener-d.com

UK: Southern Scientific +44 (0) 1903 821178

France: Alimtronic +33 1 45 47 85 26

VXI modules

Resource Manager STR8032

This card is modular based on a commercial processor from CES, with parts from two other sources. Most of the VXI module parts are provided by Bastian Technology, and a special visualisation module from Daresbury.

  1. The commercial processor from CES will need to conform with the specification for the Exogam experiment, and must include the LynxOS runtime license to be able to use the MIDAS control software provided for Exogam by NPSG.
  2. Bastian Technology will supply a number of parts designed specifically for the Exogam use of the VXI bus lines for distribution of trigger, and timing signals throughout the experiment. They will integrate the CES processor into the VXI module.
  3. To allow engineers to view the experiment's trigger, timing and control signals from their home laboratories a Logic Analyser is provided to be installed in the VXI module. This greatly increases the engineers ability to solve system problems during experiments, and commissioning.

Purchase the VXI module from Bastian Technology as

Purchase the processor from CES, or arrange for Bastian Technology to purchase direct from CES.

Purchase a Resource Manager Logic Analyser from NPSG.

VRE (VXI Readout Engine) STR8080.

This card is modular with parts from two sources.

  1. The module contains a Motorola DSP ( Digital Signal Processor) which will require software provided by NPSG. The user interface for the STR8080, provided as part of the MIDAS software from NPSG, provides access to a library of DSP codes developed by NPSG which program the STR8080 to perform Eurogam/Exogam readout.
  2. The VXI module contains an interface specifically designed for the Exogam readout system. The output interface is the DT32 bus. Some of the VXI backplane lines are specified for event data readout of the data acquisition cards, and controlled by a the DSP via custom interface.
  3. An additional card, the P3 card, is required to access further VXI signals specified for use in data acquisition flow control.

Purchase the VXI module from Bastian Technology as:

The request for this module should include the following statement:

The STR8080 must be compatible with those purchased for the Euroball experiment. Including the modification agreed 16 April 1996 between Dr.B.Struck, Daresbury Laboratory, and CRN Strasbourg..

A copy of the modification request sheet is appended.

Purchase an STR8080 P3 card from NPSG.

VXI module Contacts

 

NPSG:

Mr.P.J.Coleman-Smith

p.j.coleman-smith@dl.ac.uk

 

+44 1925 603433

http://www.dl.ac.uk/ASD/NPSG

 

CLRC, Daresbury Laboratory
Daresbury,
Warrington, WA4 4AD,
England

 

 

 

 

Bastian Technology

Mr.T.Bastian

t.bastian@Batech.de

 

+49 41 09 55 0

http://www.Batech.de

 

Bastian Technology GmbH & Co
Backerbarg 6,
22889 Tangstedt, Germany

 

 

 

 

CES

Ms. Maryse Allard

ces@lancy.ces.ch

 

+41 22 792 57 45

http://www.ces.ch

 

Creative Electronic Systems
70, route du Pont Butin,
Case Postale 107,
1213 Petit-Lancy 1,
Switzerland

 

 

CHANGES TO THE STR8080 REQUESTED BY DARESBURY AND STRASBOURG.

1) Change the arbitration mode of the VME Bus master from Release-when-Done to Release-on-Request.

2) Change the format of the 'end sub-event token' used for detecting the sub-event boundaries in the data being read from the FIFO connecting the DSP to the DT32 card as follows:-

MSB LSB

OLD xxYY xxxx 1111 1111 xxxx xxxx xxxx xxxx

NEW xx11 xxxx 1111 1xxx xxxx xxxx xxxx xxxx

This can be done by changing a GAL.

3) Change the logic that detects the 'event number' nibble in the 'end sub event' token to look in the 'start sub event' token, and compare it with the 'event number' nibble found in the first 'start sub event' token for each event. If there is a difference the logic currently sets bit 31 in its 'end sub event' token. This can be kept.

TOKEN FORMAT:

MSB LSB

first start sub event xx00 0001 1111 1xxx xxxx xxxx xxxx xxxx

( )

'event number' nibble

used for compare with all others in this event.

next start sub event xx00 0010 1111 1xxx xxxx xxxx xxxx xxxx

( )

'event number' nibble

.

.

.

.

last start sub event xx00 1111 1111 1xxx xxxx xxxx xxxx xxxx

( )

'event number' nibble

4) Add a flag to the Status Register for "DT32 FIFO half full". This refers to the FIFO

between the DSP card and the DT32 card which is used to queue data onto the DT32 bus.

5) Identify four latched bi-directional data lines which may be used to connect the DSP processor to a future P3 module. Also identify control lines to associate with them. Read/write, and strobe for example.

6) Add wire links on the P2 connector to bus some VXI signals past the board:-

Links:

p2a5 to p2c5 p2a6 to p2c6

p2a8 to p2c8 p2a9 to p2c9

p2a12 to p2c12 p2a14 to p2c14

p2a17 to p2c17 p2a18 to p2c18

p2a20 to p2c20 p2a21 to p2c21

None of the above lines is to be terminated on the STR8080 unless the termination can be removed by software control.

7) Provide EMI shielding of the board to VXI 'D' size standard. The system used on the STR8032 would be acceptable, mounting the shields on pillars from the board support metal work, PLEASE RETAIN THE ABILITY TO FIT A P3 MODULE.

Modification of existing units in the field will be carried out by laboratory staff using parts and instructions provided by Struck PLEASE PRICE THESE KITS. The staff will be technicians or engineers.

Please provide copies of the circuit diagrams of the STR8080.