Zilog EZ80F916 - Manual (Page 284)

UM014423-0607 Using the Linker/Locator
ZiLOG Developer Studio II
eZ80Acclaim! ® User Manual
264
TOP OF
The TOP OF operator provides the highest allocated address of a group, address space, or
segment, excluding any segment copies when <name> is a segment. The value of TOP OF
is treated as an expression value.
Syntax
TOP OF
<name> can be a group, address space, or segment.
If you declare a segment to begin at
TOP OF
another segment, the two segments share one
memory location.
TOP OF
give the address of the last used memory location in a segment,
not the address of the next available memory location. For example,
LOCATE segment2 at TOP OF segment1
starts
segment2
at the address of the last used location of
segment1
. To avoid both seg-
ments sharing one memory location, use the following syntax:
LOCATE segment2 at (TOP OF segment1) + 1
^ (Bitwise Exclusive Or)
The ^ operator is used to perform a bitwise exclusive OR on two expressions.
Syntax
^
~ (Not)
The ~ (Not) operator is used to perform a one’s complement of an expression.
Syntax
~
USING MODIFIED ZDS II STARTUP MODULES
This section explains what steps you need to take to use modified C startup modules in dif-
ferent eZ80Acclaim! linker configurations.
The following ZDS II startup modules are required as part of correctly initializing the C
run-time environment for the eZ80
®
, as discussed in “Startup Files” on page 157:
•
src\boot\common\vectors16.asm
for eZ80190, eZ80L92, eZ80F92, and
eZ80F93 devices
•
src\boot\common\vectors24.asm
for eZ80F91