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On Wed, 11 Jul 2001 14:47:06 -0700, Larry Barras wrote:
>I've run into a number of devices (atapi usually) which transition
>from BSY=0 to BSY=1 on their own.
I have seen this problem on many ATAPI devices.
THIS IS ABSOLUTELY AND COMPLETELY ILLEGAL! Such devices should never
pass a vendor qualification test (period, no excuses)!
>This is a rather vexing situation
>for the host, who looks at the status register and sees the device is
>not busy, starts to issue a command based on that status which fails
>because the device decides to set busy on its own.
You are correct. Related to this are the ATAPI devices that decide
all on their own that a host is too slow during command execution and
just "reset" themselves. This too is absolutely and completely
illegal.
*** Hale Landis *** [EMAIL PROTECTED] ***
*** Niwot, CO USA *** www.ata-atapi.com ***
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