INT 2F U - DR DOS 6.0+ IBMBIO.COM - QUERY SIZE OF THE BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. AX = 12FFh BX = 0002h Return: AX = 0000h if supported DX = size of the DOS BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. in paragraphs CL and flags trashed Note: This API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running. Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes. is provided by IBMBIO.COM for the initialization phase of drivers loaded via DEVICE=/HIDEVICE=/DEVICEHIGH= directives and is only available during these short time intervals. It is called by DR DOS 6.0 EMM386.SYS and Novell DOS 7 EMM386.EXE to query the size of the DOS BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. (the resident code of IBMBIO.COM). SeeAlso: AX=12FFh/BX=0000h,AX=12FFh/BX=0003h