At RTSI, our philosophy of service to our clients includes our belief that each client's differing needs should be met with a customized and individualized approach to meet the unique requirements of each system solution. We utilize our varied areas of expertise to satisfy the individual requirements with which we are consistently challenged. The situations that present themselves often call for the most creative of solutions  Our people have been carefully screened to encompass only those who are able to think "outside the box". This allows us to bring together ideas leading to the most efficient way to address any need brought before us.



RTSI was formed in October of 1993 when Mizar Inc. changed its strategic direction from 68K to DSP. RTSI has focused on OS-9 based projects since that time. As the customer base expanded and needs were met, RTSI modified its facilities to react quickly to customer demands. Our experience with Microware based software dates back to Microware's inception. Today RTSI LLC. is the leading consulting firm in OS-9 and real time related systems solutions.  In February 2013 RTSI LLC, Microsys Gmbh, and Freestation Inc purchase all of the rights to Microware OS-9 From Radisys Corporation.   Since that time we have been updating and adding new feature to OS-9.


OS-9/CE   OS-9 Community Edition

OS-9/CE for RPI0W will be distributed as a zipped .img file.   

To create a bootable OS-9 Micro-SD card:

1. you need a MicroSD card 4GB or larger in size .   The .img is a 4GB MicroSD card

2. unzip the distribution

3. using winimager https://sourceforge.net/projects/win32diskimager/files/latest/download or similar program   Write the image to the MciroSD card

4. Insert the MicorSD card in the RPI0W

5.  OS-9 will boot up to the console on the serial port on the header.  OS-9 will also use a RTC clock DS1337 or compatible. 

6. once booted the Xibse9 may be started, you will need a USB KBD and Mouse, and a HDMI monitor.


OS-9/CE is a fully functional OS-9 BSP. it include the Ultra-C compiler, and tools kit.   There is not a resident source debugger.

Ethernet is implemented using a USB dongle device https://www.amazon.com/gp/product/B00MYT481C/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1

Known Issues:

1. USB is PIO only.   Very SLOW on USB flash drives.

2. WIFI stack not yet supported.