INT 2F U - DOS 4+ internal - GET OR SET ERROR TABLE ADDRESSES
AX = 122Eh
DL = subfunction
00h get standard DOS error table
Return: ES:DI -> error table
(DOS 4: errors 00h-12h,50h-5Bh)
(DOS 5: errors 00h-26h,4Fh,51h-59h)
01h set standard DOS error table
ES:DI -> error table
02h get parameter error table (errors 00h-0Ah)
Return: ES:DI -> error table
03h set parameter error table
ES:DI -> error table
04h get critical/SHARE error table (errors 13h-2Bh)
Return: ES:DI -> error table
05h set critical/SHARE error table
ES:DI -> error table
06h get ??? error table
Return: ES:DI -> error table or 0000h:0000h
07h set ??? error table
ES:DI -> error table
08h get error message retriever (see below)
Return: ES:DI -> FAR procedure to fetch error message
09h set ??? error table
ES:DI -> error table
Notes:  if the returned segment on a "get" is 0001h, then the offset specifies
the offset of the error message table within COMMAND.COM, and the
procedure returned by DL=08h should be called
DOS 5.0 COMMAND.COM does not allow setting any of the addresses (calls
with DL odd are ignored); they are always returned with segment 0001h
for DOS 5.0, the standard and critical/SHARE error tables are combined
into a single error table
SeeAlso: INT 21/AH=59h

Format of DOS 4.x error table:
Offset  Size    Description
00h    BYTE    FFh
01h  2 BYTEs   04h,00h (DOS version???)
03h    BYTE    number of error headers following
04h 2N WORDs   table of all error headers for table
Offset  Size    Description
00h    WORD    error message number
02h    WORD    offset of error message from start of header
error messages are count byte followed by msg
Note:   DOS 5 error tables consist of one word per error number; each word
contains either the offset of a counted string or 0000h

Call error retrieval function with:
AX = error number
DI = offset of error table
Return: ES:DI -> error message (counted string)
Notes:  this function needs to access COMMAND.COM if the messages were not
loaded into memory permanently with /MSG; the caller should assume
that the returned message will be overwritten by the next call of
the function
supported by DR-DOS 5.0

See also: 2F0500

2F122E - DOS 4+ internal - GET OR SET ERROR TABLE ADDRESSES