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List of DevHlp Functions: Difference between revisions

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DevHlp function names with request code{|class="wikitable"
DevHlp function names with request code
|+ DevHlp function names with request code
 
{|class="wikitable"
!Function Name||Code||Description
!Function Name||Code||Description
|-
|-
|[[DevHlp_SchedClock|DevHlp_SchedClock]]||0x0||Called each timer tick
|DevHlp_SchedClock||0x0||Called each timer tick
|-
|-
|[[DevHlp_DevDone|DevHlp_DevDone]]||0x1||Device I/O complete
|DevHlp_DevDone||0x1||Device I/O complete
|-
|-
|[[DevHlp_Yield|DevHlp_Yield]]||0x2||Yield CPU if resched set
|DevHlp_Yield||0x2||Yield CPU if resched set
|-
|-
|[[DevHlp_TCYield|DevHlp_TCYield]]||0x3||Yield to time critical task
|DevHlp_TCYield||0x3||Yield to time critical task
|-
|-
|[[DevHlp_ProcBlock|DevHlp_ProcBlock]]||0x4||Block on event
|DevHlp_ProcBlock||0x4||Block on event
|-
|-
|[[DevHlp_ProcRun|DevHlp_ProcRun]]||0x5||Unblock process
|DevHlp_ProcRun||0x5||Unblock process
|-
|-
|[[DevHlp_SemRequest|DevHlp_SemRequest]]||0x6||Claim a semaphore
|[[DevHelp_SemRequest|DevHlp_SemRequest]]||0x6||Claim a semaphore
|-
|-
|[[DevHlp_SemClear|DevHlp_SemClear]]||0x7||Release a semaphore
|[[DevHelp_SemClear|DevHlp_SemClear]]||0x7||Release a semaphore
|-
|-
|[[DevHlp_SemHandle|DevHlp_SemHandle]]||0x8||Obtain a semaphore handle
|[[DevHelp_SemHandle|DevHlp_SemHandle]]||0x8||Obtain a semaphore handle
|-
|-
|[[DevHlp_PushRequest|DevHlp_PushRequest]]||0x9||Push the request
|[[DevHelp_PushRequest|DevHlp_PushRequest]]||0x9||Push the request
|-
|-
|[[DevHlp_PullRequest|DevHlp_PullRequest]]||0xA||Pull next request from Q
|[[DevHelp_PullRequest|DevHlp_PullRequest]]||0xA||Pull next request from Q
|-
|-
|[[DevHlp_PullParticular|DevHlp_PullParticular]]||0xB||Pull a specific request
|[[DevHlp_PullParticular]]||0xB||Pull a specific request
|-
|-
|[[DevHlp_SortRequest|DevHlp_SortRequest]]||0xC||Push request in sorted order
|[[DevHlp_SortRequest]]||0xC||Push request in sorted order
|-
|-
|[[DevHlp_AllocReqPacket|DevHlp_AllocReqPacket]]||0xD||Allocate request packet
|[[DevHlp_AllocReqPacket]]||0xD||Allocate request packet
|-
|-
|[[DevHlp_FreeReqPacket|DevHlp_FreeReqPacket]]||0xE||free request packet
|[[DevHlp_FreeReqPacket]]||0xE||free request packet
|-
|-
|[[DevHlp_QueueInit|DevHlp_QueueInit]]||0xF||Init/Clear char queue
|[[DevHlp_QueueInit]]||0xF||Init/Clear char queue
|-
|-
|[[DevHlp_QueueFlush|DevHlp_QueueFlush]]||0x10||flush queue
|[[DevHlp_QueueFlush]]||0x10||flush queue
|-
|-
|[[DevHlp_QueueWrite|DevHlp_QueueWrite]]||0x11||Put a char in the queue
|[[DevHlp_QueueWrite]]||0x11||Put a char in the queue
|-
|-
|[[DevHlp_QueueRead|DevHlp_QueueRead]]||0x12||Get a char from the queue
|[[DevHlp_QueueRead]]||0x12||Get a char from the queue
|-
|-
|[[DevHlp_Lock|DevHlp_Lock]]||0x13||Lock segment
|[[DevHlp_Lock]]||0x13||Lock segment
|-
|-
|[[DevHlp_Unlock|DevHlp_Unlock]]||0x14||Unlock segment
|[[DevHlp_Unlock]]||0x14||Unlock segment
|-
|-
|[[DevHlp_PhysToVirt|DevHlp_PhysToVirt]]||0x15||Convert physical address to virtual
|[[DevHlp_PhysToVirt]]||0x15||Convert physical address to virtual
|-
|-
|[[DevHlp_VirtToPhys|DevHlp_VirtToPhys]]||0x16||Convert virtual address to physical
|[[DevHlp_VirtToPhys]]||0x16||Convert virtual address to physical
|-
|-
|[[DevHlp_PhysToUVirt|DevHlp_PhysToUVirt]]||0x17||Convert physical to LDT
|[[DevHlp_PhysToUVirt]]||0x17||Convert physical to LDT
|-
|-
|[[DevHlp_AllocPhys|DevHlp_AllocPhys]]||0x18||Allocate physical memory
|[[DevHlp_AllocPhys]]||0x18||Allocate physical memory
|-
|-
|[[DevHlp_FreePhys|DevHlp_FreePhys]]||0x19||Free physical memory
|[[DevHlp_FreePhys]]||0x19||Free physical memory
|-
|-
|[[DevHlp_SetROMVector|DevHlp_SetROMVector]]||0x1A||Set a ROM service routine vector
|[[DevHlp_SetROMVector]]||0x1A||Set a ROM service routine vector
|-
|-
|[[DevHlp_SetIRQ|DevHlp_SetIRQ]]||0x1B||Set an IRQ interrupt
|[[DevHlp_SetIRQ]]||0x1B||Set an IRQ interrupt
|-
|-
|[[DevHlp_UnSetIRQ|DevHlp_UnSetIRQ]]||0x1C||Unset an IRQ interrupt
|[[DevHlp_UnSetIRQ]]||0x1C||Unset an IRQ interrupt
|-
|-
|[[DevHlp_SetTimer|DevHlp_SetTimer]]||0x1D||Set timer request handler
|[[DevHlp_SetTimer]]||0x1D||Set timer request handler
|-
|-
|[[DevHlp_ResetTimer|DevHlp_ResetTimer]]||0x1E||Unset timer request handler
|[[DevHlp_ResetTimer]]||0x1E||Unset timer request handler
|-
|-
|[[DevHlp_MonitorCreate|DevHlp_MonitorCreate]]||0x1F||Create a monitor
|DevHlp_MonitorCreate||0x1F||Create a monitor
|-
|-
|[[DevHlp_Register|DevHlp_Register]]||0x20||Install a monitor
|DevHlp_Register||0x20||Install a monitor
|-
|-
|[[DevHlp_DeRegister|DevHlp_DeRegister]]||0x21||Remove a monitor
|DevHlp_DeRegister||0x21||Remove a monitor
|-
|-
|[[DevHlp_MonWrite|DevHlp_MonWrite]]||0x22||pass data records to monitor
|DevHlp_MonWrite||0x22||pass data records to monitor
|-
|-
|[[DevHlp_MonFlush|DevHlp_MonFlush]]||0x23||remove all data from stream
|DevHlp_MonFlush||0x23||remove all data from stream
|-
|-
|[[DevHlp_GetDOSVar|DevHlp_GetDOSVar]]||0x24||Return pointer to DOS variable
|DevHlp_GetDOSVar||0x24||Return pointer to DOS variable
|-
|-
|[[DevHlp_SendEvent|DevHlp_SendEvent]]||0x25||an event occurred
|DevHlp_SendEvent||0x25||an event occurred
|-
|-
|[[DevHlp_ROMCritSection|DevHlp_ROMCritSection]]||0x26||ROM Critical Section
|DevHlp_ROMCritSection||0x26||ROM Critical Section
|-
|-
|[[DevHlp_VerifyAccess|DevHlp_VerifyAccess]]||0x27||Verify access to memory
|DevHlp_VerifyAccess||0x27||Verify access to memory
|-
|-
|[[DevHlp_RAS|DevHlp_RAS]]||0x28||Put info in RAS trace buffer
|DevHlp_RAS||0x28||Put info in RAS trace buffer
|-
|-
|[[DevHlp_ABIOSGetParms|DevHlp_ABIOSGetParms]]||0x29||Get ABIOS Calling Parameters
|DevHlp_ABIOSGetParms||0x29||Get ABIOS Calling Parameters
|-
|-
|[[DevHlp_AttachDD|DevHlp_AttachDD]]||0x2A||Attach to a device driver
|DevHlp_AttachDD||0x2A||Attach to a device driver
|-
|-
|[[DevHlp_InternalError|DevHlp_InternalError]]||0x2B||Signal an internal error
|DevHlp_InternalError||0x2B||Signal an internal error
|-
|-
|[[DevHlp_ModifyPriority|DevHlp_ModifyPriority]]||0x2C||Undocumented (used by PM)
|DevHlp_ModifyPriority||0x2C||Undocumented (used by PM)
|-
|-
|[[DevHlp_AllocGDTSelector|DevHlp_AllocGDTSelector]]||0x2D||Allocate GDT Selectors
|DevHlp_AllocGDTSelector||0x2D||Allocate GDT Selectors
|-
|-
|[[DevHlp_PhysToGDTSelector|DevHlp_PhysToGDTSelector]]||0x2E||Convert physical address to GDT selector
|DevHlp_PhysToGDTSelector||0x2E||Convert physical address to GDT selector
|-
|-
|[[DevHlp_RealToProt|DevHlp_RealToProt]]||0x2F||Change from real to protected mode
|DevHlp_RealToProt||0x2F||Change from real to protected mode
|-
|-
|[[DevHlp_ProtToReal|DevHlp_ProtToReal]]||0x30||Change from protected to real mode
|DevHlp_ProtToReal||0x30||Change from protected to real mode
|-
|-
|[[DevHlp_EOI|DevHlp_EOI]]||0x31||Send EOI to PIC
|DevHlp_EOI||0x31||Send EOI to PIC
|-
|-
|[[DevHlp_UnPhysToVirt|DevHlp_UnPhysToVirt]]||0x32||Mark completion of PhysToVirt
|DevHlp_UnPhysToVirt||0x32||Mark completion of PhysToVirt
|-
|-
|[[DevHlp_TickCount|DevHlp_TickCount]]||0x33||Modify timer
|DevHlp_TickCount||0x33||Modify timer
|-
|-
|[[DevHlp_GetLIDEntry|DevHlp_GetLIDEntry]]||0x34||Obtain Logical ID
|DevHlp_GetLIDEntry||0x34||Obtain Logical ID
|-
|-
|[[DevHlp_FreeLIDEntry|DevHlp_FreeLIDEntry]]||0x35||Release Logical ID
|DevHlp_FreeLIDEntry||0x35||Release Logical ID
|-
|-
|[[DevHlp_ABIOSCall|DevHlp_ABIOSCall]]||0x36||Call ABIOS
|DevHlp_ABIOSCall||0x36||Call ABIOS
|-
|-
|[[DevHlp_ABIOSCommonEntry|DevHlp_ABIOSCommonEntry]]||0x37||Invoke Common Entry Point
|DevHlp_ABIOSCommonEntry||0x37||Invoke Common Entry Point
|-
|-
|[[DevHlp_GetDeviceBlock|DevHlp_GetDeviceBlock]]||0x38||Get ABIOS Device Block
|DevHlp_GetDeviceBlock||0x38||Get ABIOS Device Block
|-
|-
|[[DevHlp_RegisterStackUsag|DevHlp_RegisterStackUsag]]||0x3A||Register for stack usage
|DevHlp_RegisterStackUsag||0x3A||Register for stack usage
|-
|-
|[[DevHlp_LogEntry|DevHlp_LogEntry]]||0x3B||Place data in log buffer
|DevHlp_LogEntry||0x3B||Place data in log buffer
|-
|-
|[[DevHlp_VideoPause|DevHlp_VideoPause]]||0x3C||Video pause on/off
|DevHlp_VideoPause||0x3C||Video pause on/off
|-
|-
|[[DevHlp_Save_Message|DevHlp_Save_Message]]||0x3D||Save message in SysInit Message Table
|DevHlp_Save_Message||0x3D||Save message in SysInit Message Table
|-
|-
|[[DevHlp_SegRealloc|DevHlp_SegRealloc]]||0x3E||Realloc DD protect mode segment
|DevHlp_SegRealloc||0x3E||Realloc DD protect mode segment
|-
|-
|[[DevHlp_PutWaitingQueue|DevHlp_PutWaitingQueue]]||0x3F||Put I/O request on waiting queue
|DevHlp_PutWaitingQueue||0x3F||Put I/O request on waiting queue
|-
|-
|[[DevHlp_GetWaitingQueue|DevHlp_GetWaitingQueue]]||0x40||Get I/O request from waiting queue
|DevHlp_GetWaitingQueue||0x40||Get I/O request from waiting queue
|-
|-
|[[DevHlp_PhysToSys|DevHlp_PhysToSys]]||0x41||Address conversion for the AOX
|DevHlp_PhysToSys||0x41||Address conversion for the AOX
|-
|-
|[[DevHlp_PhysToSysHook|DevHlp_PhysToSysHook]]||0x42||Address conversion for the AOX
|DevHlp_PhysToSysHook||0x42||Address conversion for the AOX
|-
|-
|[[DevHlp_RegisterDeviceClass|DevHlp_RegisterDeviceClass]]||0x43||Register DC entry point
|DevHlp_RegisterDeviceClass||0x43||Register DC entry point
|-
|-
|[[DevHlp_Sec|DevHlp_Sec]]||0x44||Register Security table
|DevHlp_Sec||0x44||Register Security table
|-
|-
|[[DevHlp_PerfSysTrace|DevHlp_PerfSysTrace]]||0x45||Put info in performance trace buffer
|DevHlp_PerfSysTrace||0x45||Put info in performance trace buffer
|-
|-
|[[DevHlp_RegisterPDD|DevHlp_RegisterPDD]]||0x50||Register PDD entry point with VDM manager for later PDD-VDD communication
|DevHlp_RegisterPDD||0x50||Register PDD entry point with VDM manager for later PDD-VDD communication
|-
|-
|[[DevHlp_RegisterBeep|DevHlp_RegisterBeep]]||0x51||register PTD beep service entry point with kernel
|DevHlp_RegisterBeep||0x51||register PTD beep service entry point with kernel
|-
|-
|[[DevHlp_Beep|DevHlp_Beep]]||0x52||preempt beep service via PTD
|DevHlp_Beep||0x52||preempt beep service via PTD
|-
|-
|[[DevHlp_FreeGDTSelector|DevHlp_FreeGDTSelector]]||0x53||Free allocated GDT selector
|DevHlp_FreeGDTSelector||0x53||Free allocated GDT selector
|-
|-
|[[DevHlp_PhysToGDTSel|DevHlp_PhysToGDTSel]]||0x54||Convert Phys Addr to GDT sel with given access
|DevHlp_PhysToGDTSel||0x54||Convert Phys Addr to GDT sel with given access
|-
|-
|[[DevHlp_VMLock|DevHlp_VMLock]]||0x55||Lock linear address range
|DevHlp_VMLock||0x55||Lock linear address range
|-
|-
|[[DevHlp_VMUnlock|DevHlp_VMUnlock]]||0x56||Unlock address range
|DevHlp_VMUnlock||0x56||Unlock address range
|-
|-
|[[DevHlp_VMAlloc|DevHlp_VMAlloc]]||0x56||Allocate memory
|DevHlp_VMAlloc||0x56||Allocate memory
|-
|-
|[[DevHlp_VMFree|DevHlp_VMFree]]||0x58||Free memory or mapping
|DevHlp_VMFree||0x58||Free memory or mapping
|-
|-
|[[DevHlp_VMProcessToGlobal|DevHlp_VMProcessToGlobal]]||0x59||Create global mapping to process memory
|DevHlp_VMProcessToGlobal||0x59||Create global mapping to process memory
|-
|-
|[[DevHlp_VMGlobalToProcess|DevHlp_VMGlobalToProcess]]||0x5A||Create process mapping to global memory
|DevHlp_VMGlobalToProcess||0x5A||Create process mapping to global memory
|-
|-
|[[DevHlp_VirtToLin|DevHlp_VirtToLin]]||0x5B||Convert virtual address to linear
|DevHlp_VirtToLin||0x5B||Convert virtual address to linear
|-
|-
|[[DevHlp_LinToGDTSelector|DevHlp_LinToGDTSelector]]||0x5C||Convert linear address to virtual
|DevHlp_LinToGDTSelector||0x5C||Convert linear address to virtual
|-
|-
|[[DevHlp_GetDescInfo|DevHlp_GetDescInfo]]||0x5D||Return descriptor information
|DevHlp_GetDescInfo||0x5D||Return descriptor information
|-
|-
|[[DevHlp_LinToPageList|DevHlp_LinToPageList]]||0x5E||build pagelist array from linear address
|DevHlp_LinToPageList||0x5E||build pagelist array from linear address
|-
|-
|[[DevHlp_PageListToLin|DevHlp_PageListToLin]]||0x5F||map page list array to linear address
|DevHlp_PageListToLin||0x5F||map page list array to linear address
|-
|-
|[[DevHlp_PageListToGDTSelector|DevHlp_PageListToGDTSelector]]||0x60||map page list array to GDT selector
|DevHlp_PageListToGDTSelector||0x60||map page list array to GDT selector
|-
|-
|[[DevHlp_RegisterTmrDD|DevHlp_RegisterTmrDD]]||0x61||Register TMR Device Driver
|DevHlp_RegisterTmrDD||0x61||Register TMR Device Driver
|-
|-
|[[DevHlp_RegisterPerfCtrs|DevHlp_RegisterPerfCtrs]]||0x62||Register device driver perf. ctrs (PVW)
|DevHlp_RegisterPerfCtrs||0x62||Register device driver perf. ctrs (PVW)
|-
|-
|[[DevHlp_AllocateCtxHook|DevHlp_AllocateCtxHook]]||0x63||Allocate a context hook
|DevHlp_AllocateCtxHook||0x63||Allocate a context hook
|-
|-
|[[DevHlp_FreeCtxHook|DevHlp_FreeCtxHook]]||0x64||Free a context hook
|DevHlp_FreeCtxHook||0x64||Free a context hook
|-
|-
|[[DevHlp_ArmCtxHook|DevHlp_ArmCtxHook]]||0x65||Arm a context hook
|DevHlp_ArmCtxHook||0x65||Arm a context hook
|-
|-
|[[DevHlp_VMSetMem|DevHlp_VMSetMem]]||0x66||commit/decommit memory
|DevHlp_VMSetMem||0x66||commit/decommit memory
|-
|-
|[[DevHlp_OpenEventSem|DevHlp_OpenEventSem]]||0x67||Open an event semaphore
|DevHlp_OpenEventSem||0x67||Open an event semaphore
|-
|-
|[[DevHlp_CloseEventSem|DevHlp_CloseEventSem]]||0x68||Close an event semaphore
|DevHlp_CloseEventSem||0x68||Close an event semaphore
|-
|-
|[[DevHlp_PostEventSem|DevHlp_PostEventSem]]||0x69||post an event semaphore
|DevHlp_PostEventSem||0x69||post an event semaphore
|-
|-
|[[DevHlp_ResetEventSem|DevHlp_ResetEventSem]]||0x6A||Reset an event semaphore
|DevHlp_ResetEventSem||0x6A||Reset an event semaphore            
|-
|-
|[[DevHlp_RegisterFreq|DevHlp_RegisterFreq]]||0x6B||Register PTD freq service entry point with kernel
|DevHlp_RegisterFreq||0x6B||Register PTD freq service entry point with kernel
|-
|-
|[[DevHlp_DynamicAPI|DevHlp_DynamicAPI]]||0x6C||Add a dynamic API
|DevHlp_DynamicAPI||0x6C||Add a dynamic API
|-
|-
|[[DevHlp_ProcRun2|DevHlp_ProcRun2]]||0x6D||Unblock process via procrun2
|DevHlp_ProcRun2||0x6D||Unblock process via procrun2
|-
|-
|[[DevHlp_CreateInt13VDM|DevHlp_CreateInt13VDM]]||0x6E||Create Int13 VDM (Internal Only) OEMINT13
|DevHlp_CreateInt13VDM||0x6E||Create Int13 VDM (Internal Only) OEMINT13
|-
|-
|[[DevHlp_RegisterKrnlExit|DevHlp_RegisterKrnlExit]]||0x6F||Used to capture Kernel Exits F78693
|DevHlp_RegisterKrnlExit||0x6F||Used to capture Kernel Exits   F78693
|-
|-
|[[DevHlp_PMPostEventSem|DevHlp_PMPostEventSem]]||0x70||PM Post Event Semaphore
|DevHlp_PMPostEventSem||0x70||PM Post Event Semaphore||
|-
|-
|[[DevHlp_AcquireSpinLock|DevHlp_AcquireSpinLock]]||0x71||acquire Spin Lock
|DevHlp_AcquireSpinLock||0x71||acquire Spin Lock||SMP only
|-
|-
|[[DevHlp_ReleaseSpinLock|DevHlp_ReleaseSpinLock]]||0x72||release Spin Lock
|DevHlp_ReleaseSpinLock||0x72||release Spin Lock||SMP only
|-
|-
|[[DevHlp_InitIntMouseCursorData|DevHlp_InitIntMouseCursorData]]||0x73||Initialize Mouse/Cursor Data
|DevHlp_InitIntMouseCursorData||0x73||Initialize Mouse/Cursor Data||SMP only
|-
|-
|[[DevHlp_StartIntMouseCursor|DevHlp_StartIntMouseCursor]]||0x74||Start Int Time Mouse/Cursor
|DevHlp_StartIntMouseCursor||0x74||Start Int Time Mouse/Cursor||SMP only
|-
|-
|[[DevHlp_EndIntMouseCursor|DevHlp_EndIntMouseCursor]]||0x75||End Int Time Mouse/Cursor
|DevHlp_EndIntMouseCursor||0x75||End Int Time Mouse/Cursor||SMP only
|-
|-
|[[DevHlp_Port_IO|DevHlp_Port_IO]]||0x76||Port I/O
|DevHlp_Port_IO||0x76||Port I/O||SMP only
|-
|-
|[[DevHlp_SetIRQMask|DevHlp_SetIRQMask]]||0x77||Set/Unset an IRQ Mask
|DevHlp_SetIRQMask||0x77||Set/Unset an IRQ Mask||SMP only
|-
|-
|[[DevHlp_GetIRQMask|DevHlp_GetIRQMask]]||0x78||Retrieve an IRQ Mask state
|DevHlp_GetIRQMask||0x78||Retrieve an IRQ Mask state||SMP only
|-
|-
|[[DevHlp_CreateSpinLock|DevHlp_CreateSpinLock]]||0x79||Create Spin Lock
|DevHlp_CreateSpinLock||0x79||Create Spin Lock||SMP only
|-
|-
|[[DevHlp_FreeSpinLock|DevHlp_FreeSpinLock]]||0x7A||Free Spin Lock
|DevHlp_FreeSpinLock||0x7A||Free Spin Lock||SMP only
|-
|-
|[[DevHlp_KillProc|DevHlp_KillProc]]||0x7D||Kill Proc
|[[DevHlp_KillProc]]||0x7D||Kill Proc
|-
|-
|[[DevHlp_QSysState|DevHlp_QSysState]]||0x7E||Query System State
|[[DevHlp_QSysState]]||0x7E||Query System State
|-
|-
|[[DevHlp_OpenFile|DevHlp_OpenFile]]||0x7F||Ring-0 File system Write
|[[DevHlp_OpenFile]]||0x7F||Ring-0 File system Write
|-
|-
|[[DevHlp_CloseFile|DevHlp_CloseFile]]||0x80||Ring-0 File system Seek
|[[DevHlp_CloseFile]]||0x80||Ring-0 File system Seek
|-
|-
|[[DevHlp_ReadFile|DevHlp_ReadFile]]||0x81||Ring-0 File system Read
|[[DevHlp_ReadFile]]||0x81||Ring-0 File system Read
|-
|-
|[[DevHlp_ReadFileAt|DevHlp_ReadFileAt]]||0x82||File system Read at (seek)
|[[DevHlp_ReadFileAt]]||0x82||File system Read at (seek)
|-
|-
|[[DevHlp_RegisterKDD|DevHlp_RegisterKDD]]||0x83||Register driver with kernel debugger
|DevHlp_RegisterKDD||0x83||Register driver with kernel debugger
|}
|}


[[Category:DevHlps]]
[[Category:DevHlps]]

Revision as of 03:15, 16 May 2025

DevHlp function names with request code

Function Name Code Description
DevHlp_SchedClock 0x0 Called each timer tick
DevHlp_DevDone 0x1 Device I/O complete
DevHlp_Yield 0x2 Yield CPU if resched set
DevHlp_TCYield 0x3 Yield to time critical task
DevHlp_ProcBlock 0x4 Block on event
DevHlp_ProcRun 0x5 Unblock process
DevHlp_SemRequest 0x6 Claim a semaphore
DevHlp_SemClear 0x7 Release a semaphore
DevHlp_SemHandle 0x8 Obtain a semaphore handle
DevHlp_PushRequest 0x9 Push the request
DevHlp_PullRequest 0xA Pull next request from Q
DevHlp_PullParticular 0xB Pull a specific request
DevHlp_SortRequest 0xC Push request in sorted order
DevHlp_AllocReqPacket 0xD Allocate request packet
DevHlp_FreeReqPacket 0xE free request packet
DevHlp_QueueInit 0xF Init/Clear char queue
DevHlp_QueueFlush 0x10 flush queue
DevHlp_QueueWrite 0x11 Put a char in the queue
DevHlp_QueueRead 0x12 Get a char from the queue
DevHlp_Lock 0x13 Lock segment
DevHlp_Unlock 0x14 Unlock segment
DevHlp_PhysToVirt 0x15 Convert physical address to virtual
DevHlp_VirtToPhys 0x16 Convert virtual address to physical
DevHlp_PhysToUVirt 0x17 Convert physical to LDT
DevHlp_AllocPhys 0x18 Allocate physical memory
DevHlp_FreePhys 0x19 Free physical memory
DevHlp_SetROMVector 0x1A Set a ROM service routine vector
DevHlp_SetIRQ 0x1B Set an IRQ interrupt
DevHlp_UnSetIRQ 0x1C Unset an IRQ interrupt
DevHlp_SetTimer 0x1D Set timer request handler
DevHlp_ResetTimer 0x1E Unset timer request handler
DevHlp_MonitorCreate 0x1F Create a monitor
DevHlp_Register 0x20 Install a monitor
DevHlp_DeRegister 0x21 Remove a monitor
DevHlp_MonWrite 0x22 pass data records to monitor
DevHlp_MonFlush 0x23 remove all data from stream
DevHlp_GetDOSVar 0x24 Return pointer to DOS variable
DevHlp_SendEvent 0x25 an event occurred
DevHlp_ROMCritSection 0x26 ROM Critical Section
DevHlp_VerifyAccess 0x27 Verify access to memory
DevHlp_RAS 0x28 Put info in RAS trace buffer
DevHlp_ABIOSGetParms 0x29 Get ABIOS Calling Parameters
DevHlp_AttachDD 0x2A Attach to a device driver
DevHlp_InternalError 0x2B Signal an internal error
DevHlp_ModifyPriority 0x2C Undocumented (used by PM)
DevHlp_AllocGDTSelector 0x2D Allocate GDT Selectors
DevHlp_PhysToGDTSelector 0x2E Convert physical address to GDT selector
DevHlp_RealToProt 0x2F Change from real to protected mode
DevHlp_ProtToReal 0x30 Change from protected to real mode
DevHlp_EOI 0x31 Send EOI to PIC
DevHlp_UnPhysToVirt 0x32 Mark completion of PhysToVirt
DevHlp_TickCount 0x33 Modify timer
DevHlp_GetLIDEntry 0x34 Obtain Logical ID
DevHlp_FreeLIDEntry 0x35 Release Logical ID
DevHlp_ABIOSCall 0x36 Call ABIOS
DevHlp_ABIOSCommonEntry 0x37 Invoke Common Entry Point
DevHlp_GetDeviceBlock 0x38 Get ABIOS Device Block
DevHlp_RegisterStackUsag 0x3A Register for stack usage
DevHlp_LogEntry 0x3B Place data in log buffer
DevHlp_VideoPause 0x3C Video pause on/off
DevHlp_Save_Message 0x3D Save message in SysInit Message Table
DevHlp_SegRealloc 0x3E Realloc DD protect mode segment
DevHlp_PutWaitingQueue 0x3F Put I/O request on waiting queue
DevHlp_GetWaitingQueue 0x40 Get I/O request from waiting queue
DevHlp_PhysToSys 0x41 Address conversion for the AOX
DevHlp_PhysToSysHook 0x42 Address conversion for the AOX
DevHlp_RegisterDeviceClass 0x43 Register DC entry point
DevHlp_Sec 0x44 Register Security table
DevHlp_PerfSysTrace 0x45 Put info in performance trace buffer
DevHlp_RegisterPDD 0x50 Register PDD entry point with VDM manager for later PDD-VDD communication
DevHlp_RegisterBeep 0x51 register PTD beep service entry point with kernel
DevHlp_Beep 0x52 preempt beep service via PTD
DevHlp_FreeGDTSelector 0x53 Free allocated GDT selector
DevHlp_PhysToGDTSel 0x54 Convert Phys Addr to GDT sel with given access
DevHlp_VMLock 0x55 Lock linear address range
DevHlp_VMUnlock 0x56 Unlock address range
DevHlp_VMAlloc 0x56 Allocate memory
DevHlp_VMFree 0x58 Free memory or mapping
DevHlp_VMProcessToGlobal 0x59 Create global mapping to process memory
DevHlp_VMGlobalToProcess 0x5A Create process mapping to global memory
DevHlp_VirtToLin 0x5B Convert virtual address to linear
DevHlp_LinToGDTSelector 0x5C Convert linear address to virtual
DevHlp_GetDescInfo 0x5D Return descriptor information
DevHlp_LinToPageList 0x5E build pagelist array from linear address
DevHlp_PageListToLin 0x5F map page list array to linear address
DevHlp_PageListToGDTSelector 0x60 map page list array to GDT selector
DevHlp_RegisterTmrDD 0x61 Register TMR Device Driver
DevHlp_RegisterPerfCtrs 0x62 Register device driver perf. ctrs (PVW)
DevHlp_AllocateCtxHook 0x63 Allocate a context hook
DevHlp_FreeCtxHook 0x64 Free a context hook
DevHlp_ArmCtxHook 0x65 Arm a context hook
DevHlp_VMSetMem 0x66 commit/decommit memory
DevHlp_OpenEventSem 0x67 Open an event semaphore
DevHlp_CloseEventSem 0x68 Close an event semaphore
DevHlp_PostEventSem 0x69 post an event semaphore
DevHlp_ResetEventSem 0x6A Reset an event semaphore
DevHlp_RegisterFreq 0x6B Register PTD freq service entry point with kernel
DevHlp_DynamicAPI 0x6C Add a dynamic API
DevHlp_ProcRun2 0x6D Unblock process via procrun2
DevHlp_CreateInt13VDM 0x6E Create Int13 VDM (Internal Only) OEMINT13
DevHlp_RegisterKrnlExit 0x6F Used to capture Kernel Exits F78693
DevHlp_PMPostEventSem 0x70 PM Post Event Semaphore
DevHlp_AcquireSpinLock 0x71 acquire Spin Lock SMP only
DevHlp_ReleaseSpinLock 0x72 release Spin Lock SMP only
DevHlp_InitIntMouseCursorData 0x73 Initialize Mouse/Cursor Data SMP only
DevHlp_StartIntMouseCursor 0x74 Start Int Time Mouse/Cursor SMP only
DevHlp_EndIntMouseCursor 0x75 End Int Time Mouse/Cursor SMP only
DevHlp_Port_IO 0x76 Port I/O SMP only
DevHlp_SetIRQMask 0x77 Set/Unset an IRQ Mask SMP only
DevHlp_GetIRQMask 0x78 Retrieve an IRQ Mask state SMP only
DevHlp_CreateSpinLock 0x79 Create Spin Lock SMP only
DevHlp_FreeSpinLock 0x7A Free Spin Lock SMP only
DevHlp_KillProc 0x7D Kill Proc
DevHlp_QSysState 0x7E Query System State
DevHlp_OpenFile 0x7F Ring-0 File system Write
DevHlp_CloseFile 0x80 Ring-0 File system Seek
DevHlp_ReadFile 0x81 Ring-0 File system Read
DevHlp_ReadFileAt 0x82 File system Read at (seek)
DevHlp_RegisterKDD 0x83 Register driver with kernel debugger
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