No, you've got a mistaken perception here.
Your onboard video chip is not fully Direct3D compatible. It's a very very old video chip and Intel didn't do a very good job creating it. It barely works well enough to display documents in MS Office.
HLSL is not turned on by default, but Direct3D (a prereq for HLSL) IS a default option.
Your PC is just too old to take full advantage of what MAME can do, but you can work around it and get at least SOME functionality by using -video GDI as we've described.
Try checking the MAME manual at http://docs.mamedev.org