How do I read the UPC (universal product code?) from a CDROM?
The precense of the UPC on a CD is optional, although all the audio CDs have one. CDROMs might not have a UPC, however. There's an MSCDEX function to get the UPC (int 2F, AX=0x1510, CX=, ES:BX= with the request header filled with the IOCTL INPUT command 14 (get UPC)). The MSCDEX documentation (chapters 10 and 11) will give you more information.
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