INT 2F P - MS Windows - VPD - GET 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. ENTRY POINT AX = 1684h BX = 000Fh (virtual device ID for VPD device) (see #02642) ES:DI = 0000h:0000h Return: ES:DI -> VxDA virtual device driver for Windows 3.x or 95. So called because nearly all of the Windows 3.0 drivers had names of the form "VdeviceD". See also device driver. 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. entry point (see #02653) 0000h:0000h if the VxDA virtual device driver for Windows 3.x or 95. So called because nearly all of the Windows 3.0 drivers had names of the form "VdeviceD". See also device driver. does not support 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. in current mode SeeAlso: AX=1684h"DEVICE 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.",INT 20"Windows" (Table 02653) Call VPD entry point with: EDX = function number 0000h get VPD version Return: CF clear AH = major version AL = minor version DX = ??? (CB01h) 0001h get valid??? printers Return: CF clear AX = bitmask of ??? printers (bits 0-2) 0002h get ??? for printer CX = printer port (0-2) Return: CF clear if successful BX:AX = ??? CF set on error (invalid port number) 0003h set ??? for printer CX = printer port (0-2) BX:AX = ??? Return: CF clear if successful CF set on error (invalid port number) 0004h ??? CX = printer port (0-2) EAX = VMsee Virtual Machine handle Return: CF clear if successful CF set on error (invalid port number) 0005h ??? CX = printer port (0-2) EAX = VMsee Virtual Machine handle Return: CF clear if successful CF set on error (invalid port number or ???) 0006h-000Eh unused Return: CF set 000Fh ??? CX = printer port (0-2) AX = ??? Return: CF clear if successful CF set on error (e.g. invalid port number) 0010h ??? CX = printer port (0-2) Return: CF clear if successful CF set on error (e.g. invalid port number) 0011h ??? CX = printer port (0-2) Return: CF clear if successful CF set on error (e.g. invalid port number) 0012h get port status CX = printer port (0-2) Return: CF clear if successful AX = port status (see #P0658 at PORTIBM PC Portable (uses same BIOS as XT) 03BCh"LPTAbbreviation for Line PrinTer.") CF set on error (e.g. invalid port number) else Return: CF set Note: these functions are apparently only available from the system VMsee Virtual Machine, returning CF set SeeAlso: #02652,#02654