__sys_reg1
register long _sys_arg1 asm(__sys_reg1) = (long)(a1); \
register long _sys_arg1 asm(__sys_reg1) = (long)(a1); \
register long _sys_arg1 asm(__sys_reg1) = (long)(a1); \
register long _sys_arg1 asm(__sys_reg1) = (long)(a1); \
register long _sys_arg1 asm(__sys_reg1) = (long)(a1); \