[net.micro.pc] ? PCJR extra RAM help

grayson@uiucuxc.Uiuc.ARPA (07/30/85)

	I have a friend who bought a board for his PC-JR which expands
the memory from 128K to 640K, but no one knows how to get that new
memory to be useful to the operating system.  He's convinced that the
video RAM is still located in the top of the original 128K, and that
no program can use the additional memory (except for RAM disk drivers).

	Does anyone know the remedy?  Please help.



	uucp:	{ihnp4,pur-ee}!uiucdcs!uiucuxc!grayson
		Dan Grayson, Math Dept, Univ of Ill, Urbana 61801