31 - overwritten by CP/M jump instruction in INT 30
 310000 - DPMI 0.9+ - ALLOCATE LDT DESCRIPTORS
 310001 - DPMI 0.9+ - FREE LDT DESCRIPTOR
 310002 - DPMI 0.9+ - SEGMENT TO DESCRIPTOR
 310003 - DPMI 0.9+ - GET NEXT SELECTOR INCREMENT VALUE
 310004 - DPMI 0.9+ - LOCK SELECTOR
 310005 - DPMI 0.9+ - UNLOCK SELECTOR
 310006 - DPMI 0.9+ - GET SEGMENT BASE ADDRESS
 310007 - DPMI 0.9+ - SET SEGMENT BASE ADDRESS
 310008 - DPMI 0.9+ - SET SEGMENT LIMIT
 310009 - DPMI 0.9+ - SET DESCRIPTOR ACCESS RIGHTS
 31000A - DPMI 0.9+ - CREATE ALIAS DESCRIPTOR
 31000B - DPMI 0.9+ - GET DESCRIPTOR
 31000C - DPMI 0.9+ - SET DESCRIPTOR
 31000D - DPMI 0.9+ - ALLOCATE SPECIFIC LDT DESCRIPTOR
 31000E - DPMI 1.0+ - GET MULTIPLE DESCRIPTORS
 31000F - DPMI 1.0+ - SET MULTIPLE DESCRIPTORS
 310100 - DPMI 0.9+ - ALLOCATE DOS MEMORY BLOCK
 310101 - DPMI 0.9+ - FREE DOS MEMORY BLOCK
 310102 - DPMI 0.9+ - RESIZE DOS MEMORY BLOCK
 310200 - DPMI 0.9+ - GET REAL MODE INTERRUPT VECTOR
 310201 - DPMI 0.9+ - SET REAL MODE INTERRUPT VECTOR
 310202 - DPMI 0.9+ - GET PROCESSOR EXCEPTION HANDLER VECTOR
 310203 - DPMI 0.9+ - SET PROCESSOR EXCEPTION HANDLER VECTOR
 310204 - DPMI 0.9+ - GET PROTECTED MODE INTERRUPT VECTOR
 310205 - DPMI 0.9+ - SET PROTECTED MODE INTERRUPT VECTOR
 310210 - DPMI 1.0+ - GET PROTECTED MODE EXTENDED PROCESSOR EXCEPTION HANDLER
 310211 - DPMI 1.0+ - GET REAL MODE EXTENDED PROCESSOR EXCEPTION HANDLER
 310212 - DPMI 1.0+ - SET PROTECTED MODE EXTENDED PROCESSOR EXCEPTION HANDLER
 310213 - DPMI 1.0+ - SET REAL MODE EXTENDED PROCESSOR EXCEPTION HANDLER
 310300 - DPMI 0.9+ - SIMULATE REAL MODE INTERRUPT
 310301 - DPMI 0.9+ - CALL REAL MODE PROCEDURE WITH FAR RETURN FRAME
 310302 - DPMI 0.9+ - CALL REAL MODE PROCEDURE WITH IRET FRAME
 310303 - DPMI 0.9+ - ALLOCATE REAL MODE CALLBACK ADDRESS
 310304 - DPMI 0.9+ - FREE REAL MODE CALLBACK ADDRESS
 310305 - DPMI 0.9+ - GET STATE SAVE/RESTORE ADDRESSES
 310306 - DPMI 0.9+ - GET RAW MODE SWITCH ADDRESSES
 310400 - DPMI 0.9+ - GET DPMI VERSION
 310401 - DPMI 1.0+ - GET DPMI CAPABILITIES
 310500 - DPMI 0.9+ - GET FREE MEMORY INFORMATION
 310501 - DPMI 0.9+ - ALLOCATE MEMORY BLOCK
 310502 - DPMI 0.9+ - FREE MEMORY BLOCK
 310503 - DPMI 0.9+ - RESIZE MEMORY BLOCK
 310504 - DPMI 1.0+ - ALLOCATE LINEAR MEMORY BLOCK
 310505 - DPMI 1.0+ - RESIZE LINEAR MEMORY BLOCK
 310506 - DPMI 1.0+ - GET PAGE ATTRIBUTES
 310507 - DPMI 1.0+ - MODIFY PAGE ATTRIBUTES
 310508 - DPMI 1.0+ - MAP DEVICE IN MEMORY BLOCK
 310509 - DPMI 1.0+ - MAP CONVENTIONAL MEMORY IN MEMORY BLOCK
 31050A - DPMI 1.0+ - GET MEMORY BLOCK SIZE AND BASE
 31050B - DPMI 1.0+ - GET MEMORY INFORMATION
 310600 - DPMI 0.9+ - LOCK LINEAR REGION
 310601 - DPMI 0.9+ - UNLOCK LINEAR REGION
 310602 - DPMI 0.9+ - MARK REAL MODE REGION AS PAGEABLE
 310603 - DPMI 0.9+ - RELOCK REAL MODE REGION
 310604 - DPMI 0.9+ - GET PAGE SIZE
 310700 - DPMI 0.9+ - MARK PAGES AS PAGING CANDIDATES
 310701 - DPMI 0.9+ - DISCARD PAGES
 310702 - DPMI 0.9+ - MARK PAGE AS DEMAND PAGING CANDIDATE
 310703 - DPMI 0.9+ - DISCARD PAGE CONTENTS
 310800 - DPMI 0.9+ - PHYSICAL ADDRESS MAPPING
 310801 - DPMI 1.0+ - FREE PHYSICAL ADDRESS MAPPING
 310900 - DPMI 0.9+ - GET AND DISABLE VIRTUAL INTERRUPT STATE
 310901 - DPMI 0.9+ - GET AND ENABLE VIRTUAL INTERRUPT STATE
 310902 - DPMI 0.9+ - GET VIRTUAL INTERRUPT STATE
 310A00 - DPMI 0.9+ - GET VENDOR SPECIFIC API ENTRY POINT
 310B00 - DPMI 0.9+ - SET DEBUG WATCHPOINT
 310B01 - DPMI 0.9+ - CLEAR DEBUG WATCHPOINT
 310B02 - DPMI 0.9+ - GET STATE OF DEBUG WATCHPOINT
 310B03 - DPMI 0.9+ - RESET DEBUG WATCHPOINT
 310C00 - DPMI 1.0+ - INSTALL RESIDENT HANDLER INIT CALLBACK
 310C01 - DPMI 1.0+ - TERMINATE AND STAY RESIDENT
 310D00 - DPMI 1.0+ - ALLOCATE SHARED MEMORY
 310D01 - DPMI 1.0+ - FREE SHARED MEMORY
 310D02 - DPMI 1.0+ - SERIALIZE SHARED MEMORY
 310D03 - DPMI 1.0+ - FREE SERIALIZATION ON SHARED MEMORY
 310E00 - DPMI 1.0+ - GET COPROCESSOR STATUS
 310E01 - DPMI 1.0+ - SET EMULATION