How to detec sound and disply cards in DOS?

Software out there to do the job but its not cheap... here is a link to all DOS COMMANDS... maybe you can make heads or tails and use them to detect your hardware.. otherwise id go and buy the software

Computer Diagnostic Software- Professional Hardware Diagnostics Kit (http://www.pc-diagnostics.com/pc_diagnostics_tools/pc_diagnostics_pro_kit.shtml)