NEC 2000 manual Write Back

	Advanced Menu
Menu Item	Settings (default is bold)
Cache Base 0-512K	Uncached, Write Through, Write Protect,
	Write Back
	Controls caching of 512K base memory.
Cache Base 512-640K	Uncached, Write Through, Write Protect,
	Write Back
	Controls caching of 512K-640K base
	memory.
Cache Extended Memory	Uncached, Write Through, Write Protect,
Area	Write Back
	Controls caching of system memory above
	one MB.
Cache C800-CBFF	Disabled, Write Through, Write Protect,
Cache CC00-CFFF	Write Back
Cache D000-D3FF
Cache D400-D7FF	Setting at Disabled prohibits caching.
Cache D800-DBFF
Cache DC00-DFFF	Setting at Write Through permits writes to be
	cached and sent to main memory at once.
	Setting at Write Protect causes the BIOS to
	ignore writes.
	Setting at Write Back permits write caching
	but delays sending data to main memory
	until necessary.

3-14 Configuring the System