basic assembly template for keil ARM simulator

asm.s

Stack_Size      EQU     0x00000400

                AREA    STACK, NOINIT, READWRITE, ALIGN=3
Stack_Mem       SPACE   Stack_Size
__initial_sp

    THUMB

    AREA    RESET, DATA, READONLY
    EXPORT  __Vectors

__Vectors
    DCD     __initial_sp                   ; Top of Stack
    DCD     Reset_Handler                  ; Reset Handler
    DCD     NMI_Handler                    ; NMI Handler
    DCD     HardFault_Handler              ; Hard Fault Handler

    AREA    |.text|, CODE, READONLY


; nmi handler
NMI_Handler    PROC
    EXPORT  NMI_Handler
    B .
    ENDP


; hardfault handler
HardFault_Handler    PROC
    EXPORT  HardFault_Handler
    B .
    ENDP


; entry function
Reset_Handler    PROC
    EXPORT  Reset_Handler
    ; Edit below this line

    MOVS R0, #10
loop
    SUBS R0, #1
    BNE loop

    ; Edit above this line
    B .
    ENDP

    END