AX51: ERRORS ASSEMBLING STARTUP.A51

Information in this article applies to:

• AX51 Version 1.14
• µVision2 Version 2.14

SYMPTOM

When I use the AX51 assembler for my 8051 project, I receive the following error when I assemble the STARTUP.A51 file:

000006                  141                     MOV     SP,#?STACK-1
*** ____________________________________________________^
*** ERROR #A45 IN 141 (STARTUP.A51, LINE 141): UNDEFINED SYMBOL

CAUSE

This error is caused by the SP sfr which is undefined. This SFR was defined automatically by the A51 assembler.

RESOLUTION

Define the SP SFR and the assembler will no longer generate this error. For example:

SP      EQU     81h
                MOV     SP,#?STACK-1

Last Reviewed: Friday, July 20, 2001