LynxOS RTOS 4.2 Feature List The world's most powerful, open-standards embedded RTOS

In addition to the features listed here, LynxOS® 4.2 supports 324 RFCs.

Enhanced LynxOS features in version 4.2

Increased RAM support—LynxOS kernel supports up to 1 GB RAM
New GNU Toolchain based on gcc 3.2.2
MMX/SSE/SSE2 support—enhanced support for Pentium
Additional POSIX APIs—POSIX timeouts
Updated Linux Application Binary Interface (ABI) compatibility—Linux glibc 2.2.93
Enhanced PCI Express and Message Signaled Interrupt (MSI) features
Serial ATA support

Kernel features

Hard real-time determinism
Multitasking and multithreaded RTOS
Unlimited number of tasks
Extensive support for multi-threaded application
Complete MMU based protected address spaces for tasks
Page level memory mapping for efficient memory management
256 priority levels
Priority inheritance semaphore support
Kernel threads and priority tracking support (LynuxWorks patented)
Four scheduling policies (FIFO, Priority Quantum, Round-Robin, Non-preemptive)
Deterministic context switching through real-time scheduling
Low interrupt and task response times through efficient interrupt handling
Demand paged virtual memory support
Comprehensive inter-task communication facilities
- Message queues, semaphores, shared memory, sockets, signals, pipes, mutexes, condition variables (POSIX®)
- Message queues, semaphores, shared memory (SystemV)
Comprehensive POSIX API conformance 1003.1, .1b & .1c.
MMAP support for regular files and shared memory
Extremely fast boot times
Configurable tick timer resolution
Configurable time quantum for priority levels
Dynamic loading of device driver modules
MIB style visibility into kernel variables
Efficient floating point context management
Support for static and dynamically linked libraries
ELF file format support for all user applications
SVR4-style ELF shared library support
Modular design for flexible footprint management
Kernel downloadable image (KDI) for diskless environments (LynuxWorks patented)
POSIX real-time timer and clock support
Kernel crash analysis
Kernel level event logging of system events
Up to 512MB of system managed RAM
Up to 1.5GB of RAM can be utilized using MMAP per process (for over 2GB total supported RAM)
Debug version of kernel for profiling and watchpoint support
Dynamic device drivers

Networking support

Full state-of-the-art TCP/IP stack derived from FreeBSD 4.2 and enhanced for reentrancy, determinism and performance
IPv4 and IPv6 support (IPv6 Services available via add-on package)
IPSec/IKE/VPN (Services available via add-on package)
Protocols: TCP, UDP, ICMP, IGMP, ARP, RARP, DHCP, NAT, RPC, NTPv3
Divert Sockets, PF Packet, Raw Ethernet support
Routing Protocols (Zebra routing package)
- RIP, RIPv2
- Distance Multicast Routing Protocol (DVMRP)
- BGP4
- OSPF, OSPFv2
Network Booting
- PXE Netboot, TFTP boot
Network Security
- Secure DNS dynamic update
- IPSEC AH, IPSEC ESP
- PPP Password Authentication, PPP Challenge Handshake AP
- Firewall support: ipfw, ip6fw
Network Management
- SNMP v1, v2 and v3
- BIND: dns services, named
Network Device Support
- Gigabit Ethernet
- 100baseT interfaces
Network Daemons
- IPv4: inetd, routed, rlogind, telnetd, dhcpd, tftpd, etc.
- IPv6: faithd, pim6sd, pim6dd, rtsold, route6d, etc.

Linux application support

Linux application binary interface (ABI) personality
Linux binaries run unchanged
Compatible with Linux v2.4.x and glibc v2.2.93
Debugger support for Linux binaries

File system support

Lynx Fast File system
ISO 9660 file system
Network File System (NFS)
RAM disk file system

I/O device support

IDE and EIDE with DMA support
SCSI support: Adaptec 19160, 29160, 29160N; Symbios 53c895/896
Flash support: M-systems TrueFFS, Flash interface chips
PCMCIA support
UART, PTY (pseudo TTY support)
DRM device abstraction layer for portability of drivers
Messenger support for advanced backplane messaging

Libraries and utilities

Over 100 libraries and over 2500 utility routines
Over 500 native utilities and daemon

Development environment

Native Development environment
- Multiple interactive shells: bash, csh, ash, dlsh
Cross Development: Solaris 7/8, Windows 2K, XP/Pro, Linux RH 7.2
GNU tool chain: GCC, G++ 3.22, GDB
Full support for multithreaded ANSI C development
Full support for multithreaded C++ development
Static, Dynamic, Multithreaded versions of system libraries
ELF Dynamic linking loader
C language Altivec support
Symbolic debugging of multithreaded & Altivec applications
Watchpoint support for application & kernel debuggers
Configurable core file support
- Selective core file contents (Stack plus data, BSS, heap, and/or shared memory)
- Post-mortem debugging of configurable core files
X11R6, Motif, PosixDesk product support
Full suite of tools