# Re: mustek_pp backend vs musteka4s2 backend

From: Jochen Eisinger (jochen.eisinger@gno.de)
Date: Mon Jul 10 2000 - 01:57:25 PDT

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  Petter Reinholdtsen schrieb:
  >
  > What is the relationship between the mustek_pp backend and the
  > musteka4s2 backend?

  Jeff wrote the musteka4s2 backend (currently v0.3) which supports ASIC
  1013 scanners. The backend is based on a stand-alone program "scan"
  which is based on the TWAIN driver. I (jochen) added some patches to
  make my ASIC 1015, CCD 0 scanner work. But with these patches some ASIC
  1013 do *not* work that good anymore. So there are two versions of the
  musteka4s2 backend which cover together all ASIC 1013 and ASIC 1015, CCD
  0 scanners, but neither fits the rules in backend/GUIDE (scanimage -T
  fails, saned/net fails, hardware IO is done in the backend).

  > Did one replace the other, or where both
  > developed independently.

  I wrote the mustek_pp backend for three reasons: a) I wanted to have a
  backend that follows backend/GUIDE, b) I wanted to have one backend for
  all scanners, c) I wanted a backend that is easy to patch for other
  chipsets.

  The mustek_pp backend is based on the mustek backend (structure) the
  TWAIN driver (protocol) and the musteka4s2 backend (names). The
  mustek_pp backend supports all ASIC 1013 scanners and the ASIC 1015, CCD
  0 scanner. There is code included for ASIC 1015, CCD 1/4 scannres and
  for ASIC 1505 scanner, but this code is still under development.

  Furthermore the hardware IO is done in sanei_pa4s2 (which is already in
  the CVS)

  > Are the same scanners supported?
  Yes, but (I hope :-) in the future mustek_pp will support more.

  -- jochen

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