A memory control system for controlling write-enable signals. The memory control system has a first memory slot having a write-enable pin thereon, a second memory slot having a first write-enable pin and a second write-enable pin thereon and a control chipset having a write-enable pin and a dual-purpose write-enable/memory-parity-data pin thereon. The write-enable pin of the control chipset is connected to the write-enable pin of the first memory slot and the first write-enable pin of the second memory slot. The write-enable/memory-parity-data pin of the control chipset is connected to the second write-enable pin of the second memory slot. In this invention, since the design of the write-enable system is more flexible, length of trace line on a computer board can be greatly reduced. In addition, the system permits the incorporation of one cycle (1T) timing into design of memory access commands.