Intel 121748-001 manual Location Offset, Mov Ah.Highsym

8086 Object Module Formats Version 4.!.J

2.4 Seqment-R~lativeOffset Reference (data reference) With No Groupinq And Both LSEG's Created In The Same Translation

Diagram in (2.1) can be used.

LOCATION: OFFSET

PSEG: TARGET (this is the most common choice)

TARGET: SI(8) ,dl

or SI(8) where dl is applied to the LOCATION

Note that this fixup is exactly the same as the Seqment-Relative Pointer Reference shown in (2.l) with one exception: the LOCATION requires no BASE fixup. This means one less fixup value to calculate at LOCATE time. A Segment-Relative Offset Reference with qroupinq is exactly the same as th~ Seqment-Re1ative Pointer Reference with qroupinq shown in (2.3) with the same exception mentioned above.

NOTE: LOCATION could also be HIBYTE, if the source code were. for eX-1mple

MOV AH.HIGH(SYM)

Note that. unlike the 8080 R & L, this fixup will take into account the final location of SYM. If SYM has the value 190H as an offset within its LSEG which is to be LOCATE'd at 3680H relati'le to tne PSEG. we have the followinq:

8080	~ lit L:	HIGH(SYM) = 1
._----	I-OCA'fION: 1 byte containinq
	LOCATE at 3680H => LOCATION	IH

+HIGH (3680H) = 3~~

37H

~ote that this value is not correct!

8 qaf, R 5r L:

------Ljt~TION:1 byte containinq zero

F'ixup record: 2 bItes containinq 190H

LeCATE at 3~80H => Fixup value: 190H

+Base Address 3~~0H

39l~H

38H is then applied to the LOCATIO~ (HIBYT~)

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