| 摘要 |
A method and system for more directly reading from or writing to a peripheral device (8) 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 (4) monitors the status of a direct command queue (52) afterthe 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 and status registers via standard communication technology is thus avoided. |
