Intel 8XC196MH, 8XC196MD, 8XC196MC manual Addressing a Location Through a Window

8XC196MC, MD, MH USER’S MANUAL

Table 4-10. Selecting a Window of the Upper Register File

Register RAM	WSR Value	WSR Value	WSR Value
	for 32-byte Window	for 64-byte Window	for 128-byte Window
Locations
	(00E0–00FFH)	(00C0–00FFH)	(0080–00FFH)
8XC196MH Only
02E0–02FFH	57H
02C0–02DFH	56H	2BH
02A0–02BFH	55H
0280–029FH	54H	2AH	15H
0260–027FH	53H
0240–025FH	52H	29H
0220–023FH	51H
0200–021FH	50H	28H	14H
8XC196MC, 8XC196MD, and 8XC196MH
01E0–01FFH	4FH
01C0–01DFH	4EH	27H
01A0–01BFH	4DH
0180–019FH	4CH	26H	13H
0160–017FH	4BH
0140–015FH	4AH	25H
0120–013FH	49H
0100–011FH	48H	24H	12H

4.2.2Addressing a Location Through a Window

After you have selected the desired window, you need to know the windowed direct address of the memory location (the address in the lower register file). Calculate the windowed direct ad- dress as follows:

1.Subtract the base address of the area to be remapped (from Table 4-11 on page 4-15) from the address of the desired location. This gives you the offset of that particular location.

2.Add the offset to the base address of the window (from Table 4-12 on page 4-15). The result is the windowed direct address.

Appendix C includes a table of the windowable SFRs with the WSR values and windowed direct addresses for each window size. Examples beginning on page 4-16 explain how to determine the WSR value and windowed direct address for any windowable location. An additional example shows how to set up a window by using the linker locator.

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