Intel iapx 432 manual Subrange/Window Attributes lDgical Mode

iAPX 432 Interface Processor Architecture Reference Manual

PS ADDRESS SPACE 432 ADDRESS SPACE

%P		-,r~-	--.-.-----
64K
Byte
Range					Adjusted
			SOBRANGE		Object
					Lenqth
		..
				LENGTH
Access		p-	I Transfer
			Displacement
	1.... _----			1

Initial Computations

o Adjusted Object Length = Object Length - Base Displacement

oVisible Object Length = Minimum (Adjusted Object Length, Byte Count) for block mode operation.

oVisible Object Length = Minimum (Adjusted Object Length, Subrange Size) for randan mode operation.

o Physical Base Address = Base Address + Base Displacement

oDuring block transfers in logical mode (window 0 only), the h¥te oount must be less than the Visible Object Length.

Constraints During Data Transfer

oTransfer Displacement must be less than the Visible Object Length

oPhysical Base Address + Transfer Displacement must be less than 22]1-1

Figure 3-2 Subrange/Window Attributes (lDgical Mode)

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