Abstract: A memory module for use with a computer system board includes at least one memory chip connected to a bus line conductor and a terminating resistor connected to the bus line conductor. The memory module further includes a connector configured to connect the bus line conductor to bus line of the computer system board. A computer system board includes a bus line including first branch configured to connect to a first memory module and a second branch configured to connect to a second memory module. The computer system board further includes a memory controller coupled to the first and second branches of the bus line at a single pin thereof. In other embodiments, a computer system board includes a bus line having first and second branches. A first switch is operative to selectively couple a first plurality of memory modules to a first branch of a bus line of the system board. A second switch is operative to selectively couple a second plurality of memory modules to the second branch of the bus line.

Abstract: Memory interface systems include one or more channel lines that couple a memory to a memory controller such that the channel line(s) are responsive to a terminal voltage that is independent of supply voltages for the memory and the memory controller. Because the memory interface system uses a terminal voltage that is independent of the supply voltages of the memory and the memory controller, the interface system may be unaffected by voltage differences between the memory supply voltage and the memory controller supply voltage.