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4-17
MEMORY PARTITIONS
4.2.2.5 Using the Linker Locator to Set Up a Window
In this example, the linker locator is used to set up a window. The linker locator locates the win-
dow in the upper register file and determines the value to load in the WSR for access to that win-
dow. (Please consult the manual provided with the linker locator for details.)
********* mod1 **************
mod1 module main ;Main module for linker
public function1
extrn ?WSR ;Must declare ?WSR as external
wsr equ 14h:byte
sp equ 18h:word
oseg
var1: dsw 1 ;Allocate variables in an
var2: dsw 1 ;overlayable segment
var3: dsw 1
cseg
function1:
push wsr ;Prolog code for wsr
ldb wsr, #?WSR ;Prolog code for wsr
add var1, var2, var3 ;Use the variables as registers
;
;
;
ldb wsr, [sp] ;Epilog code for wsr
add sp, #2 ;Epilog code for wsr
ret
end
******** mod2 **************
public function2
extrn ?WSR
wsr equ 14h:byte
sp equ 18h:word
oseg
var1: dsw 1
var2: dsw 1
var3: dsw 1
cseg
function2:
push wsr ;Prolog code for wsr