Intel 80C188XL Register Mnemonic, DxDSTH, Register Function, Contains the upper 4 bits of the DMA

DIRECT MEMORY ACCESS UNIT

Register Name:DMA Destination Address Pointer (High)

Register Mnemonic:	DxDSTH
Register Function:	Contains the upper 4 bits of the DMA
	Destination pointer.
15					0
		D	D	D	D
		D	D	D	D
		A	A	A	A
		1	1	1	1
		9	8	7	6

A1178-0A

Bit	Bit Name	Reset	Function
Mnemonic		State
DDA19:16	DMA	XXXXH	DDA19:16 are driven on A19:16 during the
	Destination		deposit phase of a DMA transfer.
	Address

NOTE: Reserved register bits are shown with gray shading. Reserved bits must be written to a logic zero to ensure compatibility with future Intel products.

Figure 10-9. DMA Destination Pointer (High-Order Bits)

10-13