APCI(4)               OpenBSD Programmer's Manual (HP300)              APCI(4)

NAME
     apci - Apollo utility chip serial communications interface

SYNOPSIS
     apci* at frodo?

DESCRIPTION
     The apci driver supports the non-keyboard 8250-like UART connected to the
     frodo(4) Apollo utility chip.  The first UART is used to communicate with
     the Domain keyboard.  The second is the serial console port when the
     firmware is in Domain/OS mode, and is mapped to select code 9 by the HP-
     UX firmware (except on 425e models).  As such, the second UART is handled
     by the dca(4) driver on all models but the 425e.

     There is no tty attached to the first UART as it lacks modem/flow control
     and is directly connected to the keyboard connector.

     Input and output for each line may be set to one of the following baud
     rates: 50, 75, 110, 134.5, 150, 300, 600, 1200, 1800, 2400, 4800, 9600,
     19200, or 38400.

FILES
     /dev/ttya[0-3]
     /dev/cuaa[0-3]

DIAGNOSTICS
     apci%d: silo overflow.  The single-character input ``silo'' has over-
     flowed and incoming data has been lost.

SEE ALSO
     dnkbd(4), frodo(4), intro(4), tty(4)

BUGS
     Much of the code in the apci driver could be shared with the dca(4) driv-
     er.

OpenBSD 4.7                     January 2, 2010                              1
