Int 2F Fn 1684  - Ms Windows - Mx1501had - Get Api Entry Point             [-]

   AX = 1684h
   BX = 377Bh (virtual device ID for MX1501HAD device)
   ES:DI = 0000h:0000h

Return: ES:DI -> VxD API entry point (see #2395)
         0000h:0000h if the VxD does not support an API

Note:  The drivers VCMD95C.VXD and VCMD.386 are part of the driver disks
     provided with the chip-card-reader/keyboard combination MX 1501 HAD,
     produced by Cherry

See Also: AX=1684h"DEVICE API",INT 20"Windows"

(Table 2395)
Call CHERRY VCMD95C.VXD entry point with:
   AX = function
       0001h get version

       Return: AX = version number (0100h) (AH = major, AL = minor)
       0002h hook INT 09 (and 8???)
       0003h unhook INT 09 (and 8???)
       0004h get number of bytes in FIFO

       Return: AX = bytes in FIFO
       0005h get next FIFO-data

       Return: AX = data
           BL = port number
           BH = direction (1=in, 0=out)
           DX:CX = timestamp
       0006h clear FIFO
       0007h output byte
       DX = port number
       BL = keyboard command

       Return: data in FIFO (see #2397)
              (value, port, in/out, timestamp)
       0008h input byte
       DX = port number

       Return: data in FIFO (see #2397)
           (value, port, in/out, timestamp)
       0009h input byte immediately
       DX = port number

       Return: AX = data
       000Ah read next FIFO data (nondestructive)

       Return: AX = data
           BL = port number
           BH = direction (1=in, 0=out)
           DX:CX = timestamp
       000Bh get timestamp

       Return: DX:CX = timestamp (in ms)
       000Ch enable IRQ 1
       000Dh disable IRQ 1
       000Eh enable data retrieval

       Note:   Sets a flag in the internal mode-byte which
             tells the driver to recognize the data
       000Fh disable data retrieval

       Note:   resets a flag in the internal mode-byte
       0010h get retrieval mode

       Return: AX = current retrieval mode
       0011h set retrieval mode
       BX = new retrieval mode (see #2396)

       Return: AX = old retrieval mode
       0012h get command value

       Return: AX = command value
       0013h set command value
       BX = command value

See Also: #2393,#2398

Bitfields for retrieval mode:
Bit(s) Description (Table 2396)
 0 enable data retrieval
 1 0 = interrupt-driven
   1 = polling mode
 2 0 = read port 60h everytime
   1 = read port 60h only when OBF of port 64h is set
 3 0 = don't call old INT 9
   1 = call INT 9 before our INT-handler
 4-7   reserved

See Also: #2395,#2397

Format of FIFO entry (1024 entries in FIFO):
Offset Size    Description (Table 2397)
 00h   BYTE    data byte
 01h   BYTE    I/O port
 02h   BYTE    direction (1=in, 0=out)
 03h   BYTE    reserved
 04h   DWORD   timestamp

See Also: #2395,#2396