A method and system for more directly reading from or writing to a peripheral
device
coupled to a computer via a standard communication protocol (such as Universal
Serial Bus (USB)) by bypassing portions of the standard communication technology.
The host controller monitors the status of a direct command queue after the completion
of each standard communication transaction. If a command is present in the direct
command queue, the command is carried out before any standard communication transactions
are performed. If no command is present in the direct command queue, a standard
communication transaction is carried out. The relatively long latency encountered
when accessing critical command status registers via standard communication technology
is thus avoided.
