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  CMX Systems Inc.  

Since its inception in 1990, CMX Systems, Inc., has focused on providing its customers with all of the tools needed to program their embedded applications. The company's core business is to develop and support real-time, multi-tasking operating systems (RTOS) and TCP/IP stacks for a wide variety of 8-bit, 16-bit, and 32-bit microcomputers, microprocessors, and digital signal processors. The company's CMX-RTXTM, CMX-RTXSTM, and CMX-Tiny+TM real-time multi-tasking operating systems support more than 40 processor families and over 30 C-compiler vendors. CMX also develops and supports products that enhance the user's ability to create, test and debug application code, including CMXKAwareTM, CMXBugTM, and CMXTrackerTM. CMX TCP/IPTM, a full-featured TCP/IP stack for 16- and 32-bit processors, also is sold by the company. CMX recently released CMX-MicroNet, which is a unique TCP/IP stack that is targeted for 8-bit processor target platforms. In addition to developing RTOSes, debugging tools, and networking software, CMX also distributes a wide variety of C tools, including compilers, assemblers, linkers, librarians, simulators and ROM debuggers from many well-known manufacturers.


CMX-MicroNet has been developed by the company that is famous for providing complete, elegant solutions to the embedded community - CMX! Our developers have the expertise and hands-on experience to satisfy the most stringent real time demands that the 8-/16-bit community deals with every day.


CMX-TCPIP is a portable high performance TCP/IP implementation for embedded systems. Memory usage is localized and deterministic. It uses the CMX-RTX RTOS signaling mechanisms to provide a true multitasking reentrant stack. CMX TCP/IP can also be run without an RTOS and all of the code is written to make it easy to switch between modes without extensive source-code changes.


CMX-INet-Plus is an RFC compliant TCP/IP stack offering extensive security protocols as well as IPv4 and IPv6 support for projects that require IPv4 now with an upgrade path to IPv6 in the future or IPv6 now. CMX-INet-Plus will work with or without an RTOS and offers an extensive variety of networking and security Add-On options giving the designer the ability to implement only those options required for their embedded application.

CMX-INet-Plus Base software includes:

  • IP, TCP, UDP
  • ICMP - Internet Control Message Protocol
  • IGMP V2 - Internet Group Management Protocol ( Multicast )
  • DHCP Client - Dynamic Host Configuration Protocol Client
  • DNS Client - Domain Name System Client
  • Ethernet ( with ARP and MAC Drivers )
  • BSD Style Sockets
  • Royalty Free Full Source code
  • Ported for specific Processor and Compiler
  • Documentation, sample test programs
  • Free Technical Support

CMX-INet-Plus allows for mixed IPv4 and IPv6 traffic and supports Multicast and Neighbor discovery, delayed acknowledgements and zero data copy for maximum performance. Also includes a Virtual File System for read only data such as web page

CMX-INet-Plus Networking and Security Add-On options include:

  • DHCP Server - Dynamic Host Configuration Protocol Server
  • DNS Server - Domain Name System Server
  • FTP - File Transfer Protocol Client/Server
  • IGMP V3 - Internet Group Management Protocol
  • NAT - Network Address Translation
  • POP3 - Post Office Protocol
  • PPP - Point to Point Protocol
  • PPPoE - PPP over Ethernet
  • RIP - Routing Information Protocol ( V1, V2 )
  • RTP/RTCP - Real-time Transport / RTP Control Protocol
  • SNMP - Simple Network Management Protocol ( V1, V2, V3 )
  • SMTP - Simple Mail Transfer Protocol
  • SNTP - Simple Network Time Protocol
  • Web Server ( HTTP Server )
  • SSL /TLS - Secure Socket Layer / Transport Layer Security
  • IKE - Internet Key Exchange
  • IPSec - Internet Protocol Security
  • Telnet Server
  • Wireless