LX51 User's Guide

Code Banking Example

A code banking application with the following memory map:

Memory Area	Address Range	Usage
On-Chip RAM	I:0x00–I:0xFF	Registers, bits, variables, stack, ...
External RAM	X:0x0000–X:0xEFFF	Variables too large for on-chip RAM.
ROM	C:0x0000–C:0x7FFF (common area)	Common area program and constant objects.
ROM	B0:0x8000–B3:0xFFFF (code banks)	Bank area program objects..

requires the following linker command line:

LX51 BANK0 {A.OBJ}, &
     BANK1 {B.OBJ}, &
     BANK2 {C.OBJ}, &
     BANK3 {D.OBJ} &
     BANKAREA (0x8000–0xFFFF) &
     SEGMENTS ( &
              IDATA(I:0x00-I:0xFF), &
              CODE(C:0x0000-C:0xEFFF), &
              XDATA(X:0x0000-X:0xEFFF) &
              )

Note

The address ranges for the BIT and DATA memory classes in the above linker command line are not required since the default settings cover the correct physical address ranges.

LX51 User's Guide

Code Banking Example

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