PMODE/W Supported DPMI INT 31h functions


7.1. About PMODE/W	Table of Contents	7.2.1. Function 0000 - Allocate Descriptors

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7. PMODE/W MSDOS Extender

7.2. PMODE/W Supported DPMI INT 31h functions

PMODE/W duplicates a subset of DPMI protected mode functions. These functions are available ONLY in protected through INT 31h. They provide descriptor services, extended memory services, interrupt services, translation services, and some other miscellaneous things. A function is called by setting AX to the function code, setting any other registers for the function, and executing INT 31h. Upon return, the carry flag will be clear if the function was successful. If the carry flag is set, the function failed. All other registers are preserved unless otherwise specified. In addition to the functions listed here, functions 0600h, 0601h, 0702h, and 0703h will return with the carry flag clear to stay compatible with code that uses those particular DPMI functions.

Function 0000 - Allocate Descriptors
Function 0001 - Free Descriptor
Function 0002 - Segment to Descriptor
Function 0003 - Get Selector Increment Value
Function 0006 - Get Segment Base Address
Function 0007 - Set Segment Base Address
Function 0008 - Set Segment Limit
Function 0009 - Set Descriptor Access Rights
Function 000A - Create Alias Descriptor
Function 000B - Get Descriptor
Function 000C - Set Descriptor
Function 0100 - Allocate DOS Memory Block
Function 0101 - Free DOS Memory Block
Function 0102 - Resize DOS Memory Block
Function 0200 - Get Real Mode Interrupt Vector
Function 0201 - Set Real Mode Interrupt Vector
Function 0202 - Get Processor Exception Handler Vector
Function 0203 - Set Processor Exception Handler Vector
Function 0204 - Get Protected Mode Interrupt Vector
Function 0205 - Set Protected Mode Interrupt Vector
Function 0300 - Simulate Real Mode Interrupt
Function 0301 - Call Real Mode Procedure With Far Return Frame
Function 0302 - Call Real Mode Procedure With IRET Frame
Function 0303 - Allocate Real Mode Callback Address
Function 0304 - Free Real Mode Callback Address
Function 0305 - Get State Save/Restore Addresses
Function 0306 - Get Raw Mode Switch Addresses
Function 0400 - Get Version
Function 0500 - Get Free Memory Information
Function 0501 - Allocate Memory Block
Function 0502 - Free Memory Block
Function 0503 - Resize Memory Block
Function 0800 - Physical Address Mapping
Function 0801 - Free Physical Address Mapping
Function 0900 - Get and Disable Virtual Interrupt State
Function 0901 - Get and Enable Virtual Interrupt State
Function 0902 - Get Virtual Interrupt State
Function EEFF - Get DOS Extender Information


7.1. About PMODE/W	Table of Contents	7.2.1. Function 0000 - Allocate Descriptors

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