15D0 INT 15 - later PS/2s - RESERVED
15D042BL00 INT 15 R - Intel Pentium Pro BIOS UPDATE - INSTALLATION CHECK
15D042BL01 INT 15 R - Intel Pentium Pro BIOS UPDATE - WRITE BIOS UPDATE AREA
15D042BL02 INT 15 R - Intel Pentium Pro BIOS UPDATE - BIOS UPDATE CONTROL
15D042BL03 INT 15 R - Intel Pentium Pro BIOS UPDATE - READ BIOS UPDATE AREA