Commodore PC Ms-Dos 3.2 User's Manual page 272

200 MS-DOS User's Reference
The /nogroup-
association option
The /overlay-
interrupt option
Typically, you use the /dsallocate option with the /high option
to take advantage of unused memory before the start of the pro
gram. The linker assumes that all free bytes in DGROUP occupy
the memory preceding the program. To use the group, you must
set a segment register to the start address of DGROUP.
Minimum abbreviation: /d
Example:
The following example directs the linker to place the program
as high in memory as possible, then adjust the offsets of all data
items in DGROUP so that they are loaded as high as possible
within the group:
link startup+file/high/dsallocate,,,em+mlibfp
Removing Groups from a Program
Syntax:
/nogroupassociation
The /nogroupassociation option directs link to ignore group
associations when assigning addresses to data and code items.
Minimum abbreviation: /nog
Note This option exists strictly for compatibility with older
versions of Fortran and Pascal (Microsoft versions 3.13 or earlier,
or any IBM version prior to 2.0). You should never use the
/nogroupassociation option except to link with object files pro
duced by those compilers, or with the run-time libraries that
accompany the old compilers.
Setting the Overlay Interrupt
Syntax:
/overlayinterruptnumber
The /overlayinterrupt option sets the interrupt number of the
overlay loading routine to number. This option overrides the nor
mal overlay interrupt number (03FH).
Number can be any integer value in the range from 0 to 255. It
must be a decimal, octal, or hexadecimal number. Octal numbers
must have a leading zero, and hexadecimal numbers must start
with a leading zero followed by a lowercase x. For example, 0x3B.
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