Bitfields for Intel 82437VX,82439TX cache control extensions register:
Bit(s)	Description	)
 7-6	reserved
 5	DRAM cache detected (read-only)
 4-0	DRAM cache refresh timer
	number of HCLKs 82437VX,82439TX remains idle during DRAM cache refresh
SeeAlso: #01099,#01108,#01112