INT 2F P - MS Windows - VCD - 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 = 000Eh (virtual device ID for VCD 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 #02652) 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 02652) Call VCD entry point with: EDX = function number 0000h get VCD version Return: CF clear AH = major version AL = minor version 0001h get ??? Return: CF clear AX = bit mask of ??? 0002h get ??? CX = COM port number Return: CF clear DX:AX -> ??? 0003h set ??? CX = COM port number DX:AX -> new ??? Return: CF clear 0004h acquire COM port AX = ??? CX = COM port number Return: CF clear AX = ??? EBX = ??? DX = ??? 0005h release COM port CX = COM port number Return: CF clear 0006h ??? Return: CF set AL = 00h else Return: CF set EAX = FFFFFFFFh Note: these functions are apparently only available from the system VMsee Virtual Machine, returning CF set and EAX=FFFFFFFFh otherwise SeeAlso: #02651,#02653