ADF is a serial port FOSSIL driver for high speed modem users. Supports FIFO UARTs 16550, 16650 and 16750, 115200 bps, any port, any IRQ, any FIFO trigger level,  FOSSIL rev level 5 and multitasking environments (such as Windows 3, Windows 95 and OS/2).

Note - Obtained from https://www.digsys.se/Obsolete/ADF.aspx