2F4300 INT 2F - EXTENDED MEMORY SPECIFICATION (XMS) v2+ - INSTALLATION CHECK
2F4308 INT 2F U - HIMEM.SYS v2.77+ - GET A20 HANDLER NUMBER
2F4309 INT 2F U - HIMEM.SYS v3.09+ - GET XMS HANDLE TABLE
2F4310 INT 2F - EXTENDED MEMORY SPECIFICATION (XMS) v2+ - GET DRIVER ADDRESS
2F4310 INT 2F - Cloaking - REAL-MODE API
2F4310 INT 2F - Helix Netroom RM386 v6.00 - XMS EXTENSIONS
2F4310 INT 2F - NEC PC-9800 - XMZ - PRIVATE API
2F4320 INT 2F U - HIMEM.SYS - Mach 20 SUPPORT
2F4330 INT 2F CU - HIMEM.SYS v2.77+ - GET EXTERNAL A20 HANDLER ADDRESS
2F43D6 INT 2F - Multiplex - ???
2F43E0BX0000 INT 2F - DOS Protected Mode Services (DPMS) v1.0 - INSTALLATION CHECK
2F43E1 INT 2F - DOS Protected Mode Services (DPMS) v1.0 - REGISTER CLIENT
2F43E2 INT 2F - DOS Protected Mode Services (DPMS) v1.0 - ENABLE/DISABLE DPMS
2F43E3BX0000 INT 2F C - DOS Protected Mode Services (DPMS) v1.0 - DPMS STARTUP BROADCAST
2F43E4BX0000 INT 2F C - DOS Protected Mode Services (DPMS) v1.0 - DPMS EXIT BROADCAST