INT 4D - TI Professional PCIBM PC - DISK - SET DEVICE INTERFACE TABLE ADDRESS AH = 09h DL = drive number (00h-07h) ES:BX -> Device Interface Table (see #03226) Return: nothing??? SeeAlso: AH=00h,AH=08h,AH=0Ah,INT 1E Format of TI Professional PCIBM PC Device Interface Table: Offset Size Description (Table 03226) 00h DWORDDoubleword; four bytes. Commonly used to hold a 32-bit segment:offset or selector:offset address. -> entry point for disk routine 04h WORD bytes per sector 06h BYTE sectors per track 07h BYTE number of heads 08h BYTE number of cylinders 09h BYTE retry count 0Ah BYTE precompensation start SeeAlso: #01264 at INT 1E