DevHelp ABIOSCommonEntry

This service starts an ABIOS common entry point according to the Advanced BIOS Transfer Convention.

Syntax
USHORT APIENTRY DevHelp_ABIOSCommonEntry (NPBYTE ReqBlk,                                          USHORT Entry_Type)

Parameters

 * ReqBlk (NPBYTE): - input:Offset in data segment to ABIOS request block
 * Entry_Type (USHORT) - input:Specifies entry point
 * ABIOS_EP_START    start
 * ABIOS_EP_INTERRUPT interrupt
 * ABIOS_EP_TIMEOUT  timeout

Return Code
Success indicator: 0

Possible error:
 * ERROR_LID_DOES_NOT_EXIST (0x02)
 * ERROR_ABIOS_NOT_PRESENT  (0x03)
 * ERROR_NOT_YOUR_LID       (0x04)
 * ERROR_INVALID_ENTRY_POINT (0x05)

Remarks
ABIOSCommonEntry sets up the stack for the call to one of the Advanced BIOS common entry points. It then invokes the indicated ABIOS common entry point. On return from the ABIOS function, ABIOSCommonEntry cleans up the stack before returning to the physical device driver.

The DS register must point to the physical device driver's data segment. If the DS register was used in a previous call to PhysToVirt, it must be reset to the data segment of the physical device driver.

C
Calling Sequence in C 
 * 1) include "abios.h"
 * 2) include "dhcalls.h"

USHORT APIENTRY DevHelp_ABIOSCommonEntry (NPBYTE ReqBlk,                                         USHORT Entry_Type) 

Assembler
Calling Sequence in Assembler  MOV  SI,RB_Offset           ; Offset in data segment to ABIOS request block MOV  DH,Entry_Point         ; Specifies entry point ; 0 = start ; 1 = interrupt ; 2 = timeout MOV  DL,DevHlp_ABIOSCommonEntry

CALL [Device_Help]  Results in Assembler  'C' Clear if successful. The ABIOS common entry point is invoked.

'C' Set if error. AX = Error code. Possible errors: ERROR_LID_DOES_NOT_EXIST    (0x02) ERROR_ABIOS_NOT_PRESENT     (0x03) ERROR_NOT_YOUR_LID          (0x04) ERROR_INVALID_ENTRY_POINT   (0x05) 