Hi There were several Forth implementations during that time. After the NC4000 was created, many realized how easy it was to create a Forth processor with the newer technology in ASIC or programmable arrays. I wonder what has failed on your board. If it isn't the chip, the rest of the board is relatively standard parts. These Forth board were often used as accelerators for PC systems. Several test that showed that these simple processors could run application more than 10 times faster than similar clocked x86 or 68K machines of the time. The RTX2000's were made RAD hardened and used quite a bit in satellites. Much of the speed was because Forth lends it self to a 3 bus architectures that functionally used at least two of these buss on each instruction. Dwight _________________________________________________________________ Catch suspicious messages before you open them?with Windows Live Hotmail. http://imagine-windowslive.com/hotmail/?locale=en-us&ocid=TXT_TAGHM_mig…