NAME    [Toc]    [Back]

     apci - Apollo utility chip serial communications interface

SYNOPSIS    [Toc]    [Back]

     apci* at frodo? offset ?

DESCRIPTION    [Toc]    [Back]

     The Apollo utility chip contains four 8250-like UARTs and is
found on all
     series  400 machines.  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    [Toc]    [Back]

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

DIAGNOSTICS    [Toc]    [Back]

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

SEE ALSO    [Toc]    [Back]

     dca(4), dcm(4), frodo(4), intro(4), tty(4)

BUGS    [Toc]    [Back]

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


OpenBSD      3.6                           May      10,      2001