HAL Exports Added For Version 4.0

This page lists the four functions that were added to the HAL for version 4.0, i.e., for Windows NT 4.0. All are still exported from the x86 builds as of version 10.0. However, only one is exported from any x64 build.

For the table below, documentation status is summarised by colour coding so that more detail can be given as Remarks with less text. (If you read this website with scripts enabled, then hovering the mouse over any coloured text will produce a tooltip that shows why the text is coloured.) Functions that have their own non-trivial documentation are shown with no background colour. If the function is documented as reserved or obsolete, it is shaded red or shaded grey, respectively. Functions that appear to be completely undocumented are highlighted yellow. If a function is documented now but was not documented in the first contemporaneous Device Driver Kit (DDK), Windows Driver Kit (WDK) or Installable File System (IFS) Kit, then it is shaded yellow to retain some of its previous status. Many undocumented functions do at least have C-language declarations in one or another header file from the WDK. These are shaded orange, except for one special case. Some declarations are known only from “minwin” headers that Microsoft published in early editions of the WDK for Windows 10 which seem since to have been withdrawn. These are highlighted orange to indicate that public knowledge even of the declaration is exceptional.

Function Export History Documentation History Declaration History
HalSystemVectorDispatchEntry x64 since 2004, forwarded to kernel    
KeAcquireSpinLockRaiseToSynch x86 only;
since 6.2, forwarded to kernel
before 5.1, declared since 6.0, declared start is 5.0
KeRaiseIrqlToDpcLevel x86 only before 5.0, declared
since 6.1 revision, documented start is 5.0
since 6.0, declared start is 5.0
KeRaiseIrqlToSynchLevel x86 only before 5.1, declared since 6.0, declared start is 5.0