Two-phase data-transfer protocol

A system for transferring data, comprising:

• a subsystem for producing a read operation identifying one of a plurality of target modules;
• a subsystem for producing a first data value associated with the read operation by the one of the plurality of target modules;
• a subsystem for generating a respective second data value by each of the target modules, wherein
• the second data value is modified for the one of the plurality of target modules by an exclusive-or operation between the first data value and a previous second data value, and
• the second data value is unmodified for the target modules besides the one of the plurality of target modules;
• a subsystem for generating a respective first validation value by each of the target modules, wherein
• the first validation value is modified for the one of the plurality of target modules, and
• the first validation value is unmodified for the target modules besides the one of the plurality of target modules;
• a subsystem for generating a second validation value from the first validation values using an exclusive-or operation;
• a subsystem for determining availability of the first data value from a modification of the second validation value;
• a subsystem for generating a third data value from the second data values using an exclusive-or operation;
• and
• a subsystem determining the first data value by an exclusive-or operation between the third data value and a previous third data value.

A system for transferring data, comprising:

• means for producing a read operation identifying one of a plurality of target modules;
• means for producing a first data value associated with the read operation by the one of the plurality of target modules;
• means for generating a respective second data value by each of the target modules, wherein
• the second data value is modified for the one of the plurality of target modules by an exclusive-or operation between the first data value and a previous second data value, and
• the second data value is unmodified for the target modules besides the one of the plurality of target modules;
• means for generating a respective first validation value by each of the target modules, wherein
• the first validation value is modified for the one of the plurality of target modules, and
• the first validation value is unmodified for the target modules besides the one of the plurality of target modules;
• means for generating a second validation value from the first validation values using an exclusive-or operation;
• means for determining availability of the first data value from a modification of the second validation value;
• means for generating a third data value from the second data values using an exclusive-or operation;
• and
• means for determining the first data value by an exclusive-or operation between the third data value and a previous third data value.

A method for transferring data, comprising:

• producing a read operation identifying one of a plurality of target modules;
• producing a first data value associated with the read operation by the one of the plurality of target modules;
• generating a respective second data value by each of the target modules, wherein
• the second data value is modified for the one of the plurality of target modules by an exclusive-or operation between the first data value and a previous second data value, and
• the second data value is unmodified for the target modules besides the one of the plurality of target modules;
• generating a respective first validation value by each of the target modules, wherein
• the first validation value is modified for the one of the plurality of target modules, and
• the first validation value is unmodified for the target modules besides the one of the plurality of target modules;
• generating a second validation value from the first validation values using an exclusive-or operation;
• determining availability of the first data value from a modification of the second validation value;
• generating a third data value from the second data values using an exclusive-or operation;
• and
• determining the first data value by an exclusive-or operation between the third data value and a previous third data value.

A system for transferring data, comprising:

• a subsystem for producing a write operation identifying one of a plurality of target modules;
• a subsystem for generating a respective first validation value by each of the target modules, wherein
• the first validation value is modified for the one of the plurality of target modules, and
• the first validation value is unmodified for the target modules besides the one of the plurality of target modules;
• a subsystem for generating a second validation value from the first validation values using an exclusive-or operation;
• and
• a subsystem for determining completion of the write operation from a modification of the second validation value.

A system for transferring data, comprising:

• means for producing a write operation identifying one of a plurality of target modules;
• means for generating a respective first validation value by each of the target modules, wherein
• the first validation value is modified for the one of the plurality of target modules, and
• the first validation value is unmodified for the target modules besides the one of the plurality of target modules;
• means for generating a second validation value from the first validation values using an exclusive-or operation;
• and
• means for determining completion of the write operation from a modification of the second validation value.

A method for transferring data, comprising:

• producing a write operation identifying one of a plurality of target modules;
• generating a respective first validation value by each of the target modules, wherein
• the first validation value is modified for the one of the plurality of target modules, and
• the first validation value is unmodified for the target modules besides the one of the plurality of target modules;
• generating a second validation value from the first validation values using an exclusive-or operation;
• and
• determining completion of the write operation from a modification of the second validation value.