//
// OVERLAYS.D - declarations for OVERLAYS package
// last edited June 26, 1976  1:06 PM
//


structure OD: [	// overlay descriptor
	da word	// disk address
	core word	// core page (for lock)
	onstack bit 1	// 1 if referenced from stack
	firstPn bit 15	// first page # in file
	]
manifest ODsize = (size OD)/16