# Re: SCSI-II scanner command list - specification file - common lib

Matto Marjanovic (maddog@mir.com)
Wed, 15 Jul 1998 11:37:17 -0400 (EWT)

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>Why don't we have a common library for all SCSI-II scanners and have
>scanner dependent command list in a specifications file (text/ plain ASCII
>file) ?

This question has been asked a number of times before (by me, among
others), and usual answer is that the SCSI-II specs for scanners is
far too vague (and open to mfg-to-mfg variation) to make a common
library useful.

>This helps in adding new SCSI-II scanners by changing only the
>specifications file (provided you get your hand on the Scanner SPECs).
>This truly helps when we have latest scanners from the same manufacturer.

If you have a new model from an old manufacturer, chances are the
command set is about the same, and the old backend just needs some
tweaks. Much easier to do. (And, I think, what gets done implicitly
by many backends --- adjusting what they send to the scanner depending
on what particular model is used.)

-matt m.

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