CCD-world: S16D interface, circular buffer mode

[Klaus Reif]

The following was posted to CCD-world:

Hi all,

we have to implement the control and data acqusition software
for the Bonn University Simultaneous Camera (BUSCA,
http://www.astro.uni-bonn.de/~ccd/busca/busca.html) on a Sparc10 
(Solaris 2.5). (The software was developed and is running currently 
on a DEC Alpha.) It seems that everything works fine except for the 
circular buffer data acquisition mode of Sbus S16D DMA interface. 
Tranferring data into a single buffer (tested up to 32MB) does work.
But BUSCA does have 4 CCD systems with 4Kx4K pixels (each).
To transfer the >128MB we need to make use of the circular buffer mode:
On the DECAlpha we have realized a real time display of the CCD data
and some calculations (data statistics) and the disk transfer are 
running in parallel to the CDD readout. According to the S16D 
documentation this mode is available. But we didn't get it working yet.
The documantation is bad.

Who uses the S16D and got this particular mode working, so that I can ask
him for further help? 

Thank you, Klaus Reif
*******************************************************************
Klaus Reif
Sternwarte of the Univ. of Bonn                 Phone:    +49 228 737834
Auf dem Huegel 71                                   FAX:     +49 228 733672
D 53121 Bonn                                          Email:
reif at astro.uni-bonn.de
Germany                                                   WWW:
http://www.astro.uni-bonn.de/~reif
*******************************************************************





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