Important!
----------
This software is free to use but comes with absolutely no warranties.
Use it at your own risk!
It works for me, and if you find it useful at all, hopefully also for you.


What is it?
-----------
A VHI driver for older Logitech Quickcam Express USB cameras.
Currently the models supported are (USB vendor ID/USB device ID):

- 0x046d/0x0870 (the one I have)

If you have a currently not supported model, then support for it
could maybe added. Let me know the IDs and we can see ...


What is required to use it?
---------------------------
You need:
- an AMIGA with a Deneb card, because isochronous transfer is used
- the Poseidon USB stack, because the driver relies on it
- one of the supported camera models 


How to install it?
------------------
Copy the file "quickcamexpress.vhi" to the LIBS:vhi folder.


How to use it?
--------------
Choose the driver in the video software that can use VHI drivers
and follow the instruction of that software.


What does work?
---------------
For the supported camera models your video software should
be able to get images from the camera.


Known problems!
---------------
During testing I had random crashes while capturing was active 
and other programs did access drives connected the CyberSCSI of 
my Cyberstorm MK2. It turned out, that this relates to the SCSI 
Handshake setting set with the UnitControl program. It was set 
to 15. But with 8 the chances for this problem to occur seem 
significantly reduced. Using the Deneb DMA or PIO driver does not 
seem to matter.


Why does it exist?
------------------
Sometime ago I thought of writing a driver for this old camera 
I had. But I could not get any documentation on the bridge chip 
used in it. So it took very long until I finally started.
With the help of USB analyser, the Linux sources and the Poseidon
author (thanks Chris) I have now a working driver for my camera 
written basically from scratch. And I am happy, that I got this 
working.


Contact
-------
If you want to report successful usage, suggestions, questions or
problems, you can send me an e-mail:

andreas_barth@gmx.net


History
-------
0.2 (2012-07-15)
- initial public release, early version, but quite stable for me

PERMISSION  UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP     NAME
---------- ----------- ------- ------- ------ ---------- ------------ ----------
[unknown]                 6936   13000  53.4% -lh5- 7246 Jul 15 14:25 quickcamexpress.vhi
[unknown]                 1240    2437  50.9% -lh5- 2be3 Jul 15 14:25 quickcamexpress_vhi.readme
---------- ----------- ------- ------- ------ ---------- ------------ ----------
 Total         2 files    8176   15437  53.0%            Jul 15 20:53