MFCS(4)

NAME
mfcs - BSC/AlfaData MultiFaceCard II/III serial communications interface

SYNOPSIS
mfc0 at mainbus0
mfcs0 at mfc0 unit 0
mfcs1 at mfc0 unit 1

DESCRIPTION
The MultiFaceCard II/III controls, among other things, a dual port EIA RS-232C (CCITT V.28) communications interface with a multiple character buffer.

Input and output for each MultiFaceCard III line may set to a maximum baud rates of 1152000. Formula for baud rate: Baud = 230400 / N with 1 N 65536.

Input and output for each MultiFaceCard II line may set to a maximum baud rates of 57600. Formula for baud rate: Baud = 115200 / N with 1 N 65536.

FILES

/dev/ttyA?

DIAGNOSTICS

mfcs0: fifo overflow. The four-character input “fifo” has overflowed and incoming data has been lost.

mfcs0: %d buffer overflows. The software based input ring buffer has overflowed %d times and incoming data has been lost.

SEE ALSO
tty(4)

HISTORY
The Amiga mfcs device first appeared in NetBSD 1.1

BUGS
The MultiFaceCard II/III serial ports use the level 6 interrupt and may experience fifo overflows if the LEV6_DEFER option is used.