Method for loading memory with program and data information from

Details Method for loading memory with program and data information from Method for loading memory with program and data information from

1996-10-21

1998-09-08

Sheikh, Ayaz R.

395306, 395308, G06F 1300

Patent

active

058058451

ABSTRACT:
A method for transferring data between devices in a computer system, the computer system comprising a first bus, a bus bridge for coupling to the first bus and for interfacing to a second bus, a second bus coupled to the bus bridge, and a plurality of peripheral devices connected to the second bus. The method comprises activating a source port in the bus bridge to configure the source port in the bus bridge for a transfer. The bus bridge receives memory address and transfer size information from the first bus, and stores the memory address and transfer size information in a register of the source port. The memory address and transfer size information is indicative of a location and amount of data to be transmitted to a target peripheral device. The bus bridge transmits one or more command messages to a destination port of the target peripheral device. The one or more command messages includes an address of the destination port and the memory address and transfer size information received from the first bus. The transmitting is performed in response to storing the memory address and transfer size information in a buffer in the bus bridge. The target peripheral device receives the one or more command messages and executes an interrupt in response thereto. The target peripheral device activates a data port in response to execution of the interrupt. The source port in the bus bridge receives data from the first bus into a buffer in the source port, and the source port in the bus bridge transfers one or more address/data pairs across the second bus to the data port of the peripheral device in response to the source port receiving the data into the buffer. The one or more address/data pairs each includes an address of the data port in the target peripheral device and the data received from the first bus.

REFERENCES:
patent: 5535341 (1996-07-01), Shah et al.
patent: 5649161 (1997-07-01), Andrade et al.
patent: 5659718 (1997-08-01), Osman et al.
patent: 5664117 (1997-09-01), Shah et al.
patent: 5694556 (1997-12-01), Neal et al.
PCI Local Bus Multimedia Design Guide, Revision 1.0, Mar. 29, 1994, pp. 1-40.
Peripheral Components, Intel, 1995, pp. ix, 1-1 through 1-72.

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