Intel iAPX 86 User Manual page 106

iAPX 86,88 Family Utilities
iAPX 86,88 Absolute Object File Formats
The OVERLAY RECORD COUNT subfield indicates the number of Overlay
Definition Records in the module.
The OVERLAY RECORD OFFSET subfielcl is a 4-byte field. It contains a 32-byte
unsigned number indicating the location in bytes, relative to the start of the object
file, of the first Overlay Definition Record in the Module.
The last sub field is a 16-byte field that should be ignored.
OVERLAY DEFINITION RECORD (OVLDEF)
REC
TYP
76H
RECOFW
LENGTH
OVERLAY OVERLAY
NAME LOCATION
z
CHK
SUM
[
Ill
L . . -_ _ L _ _ _ _
---L____
I I
~t--"----"-------'
This Record provides the overlay name, the location of the overlay in the object file.
A loader may use this record to locate the data records of the overlay in the object
file.
OVERLAY NAME
The OVERLAY NAME field provides a name by which a collection of data records
may be referenced for loading.
OVERLAY LOCATION
The OVERLA Y LOCATION is a 4-byte field which gives the location in bytes
relative to the start of the file of the first byte of the records in the overlay.
z
The Z field is a reserved field. This field is required to be zero.
END RECORD (ENOREC)
[
REC RECORD END CHK
TYP LENGTH TYP SUM
78H
This record is used to denote the end of a set of records such as records in an
overlay.
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