INT 15 - SYSTEM - BUILD ABIOS SYSTEM PARAMETER TABLE (PS)
AH = 04h
ES:DI -> results buffer length 20h for System Parameter Table
DS = segment containing ABIOS RAM extensions (zero if none)
Return: AH = 00h success: results at ES:DI
CF set on failure
SeeAlso: C1h

Format of ABIOS System Parameter Table:
Offset  Size    Description
00h    DWORD   FAR address of ABIOS Common Start Routine
04h    DWORD   FAR address of ABIOS Interrupt Routine
08h    DWORD   FAR address of ABIOS Time-out Routine
0Ch    WORD    number of bytes of stack required by this ABIOS implementation
0Eh 16 BYTEs   reserved
1Eh    WORD    number of entries in initialization table

See also: 1505

1504 - SYSTEM - BUILD ABIOS SYSTEM PARAMETER TABLE (PS)