/dev/tty00
com4
Serial communications interface
Usage
# com attachments # # i386 com0 at isa? port 0x3f8 irq 4 com1 at isa? port 0x2f8 irq 3 com2 at isa? port 0x3e8 irq 5 com3 at isa? port 0x2e8 irq 9 com* at isapnp? com* at pcmcia? com* at puc? com* at cardbus?
com* at addcom? com* at ast? com* at boca? com* at hsq?
# alpha and amd64 com0 at isa? port 0x3f8 irq 4 com1 at isa? port 0x2f8 irq 3
# amd64 and arm64 com* at acpi?
# arm64 and armv7 com* at fdt?
# hppa com0 at gsc? offset 0x5000 irq 5 com0 at gsc? offset 0x823000 irq 5 com1 at gsc? offset 0x822000 irq 6 com2 at gsc? irq 13 com1 at dino? irq 11 com0 at ssio? irq 4 com1 at ssio? irq 3
# loongson com* at leioc?
# macppc com* at puc? com* at pcmcia? com* at cardbus?
# octeon com* at fdt?
# riscv64 com* at fdt?
# sparc64 com* at asio? com* at ebus? com* at puc?
Overview
The com driver provides support for NS8250-, NS16450-, NS16550-, ST16650-, ST16C654-, and TI16750-based EIA RS-232C (CCITT V.28) communications interfaces.
The NS8250 and NS16450 have single character buffers, the NS16550 has a 16 character buffer, while the ST16650 has a 32 character buffer, and the TI16750 has a 64 character buffer.
Input and output for each line may be set to one of following baud rates; 50, 75, 110, 134.5, 150, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, or 115200, or any other baud rate which is a factor of 115200.
Files
-
-
/dev/tty01 -
/dev/cua00 -
/dev/cua01
Diagnostics
- com0: N silo overflows
-
The input “silo” has overflowed and incoming data has been lost.
- com0: weird interrupt: iir=XXXX
-
The device has generated an unexpected interrupt with the code listed.
Releases
54 releases since OpenBSD 2.8; the text changed 24 times.