There are currently two versions of the coax interface: the original is an Arduino shield that uses hard-to-find 3270 transmitter and receiver ASICs, while the more recent v2 design uses an STM32 microcontroller together with an iCE40 FPGA. However, in our case, we actually want to use a classic terminal and so this means interfacing with its coax connection, but on the other side, the OEC will use TN3270 for connecting to the emulated mainframe.
#3270 emulator mac windows
Interface buildĪs noted in the previous post, the 3270 data stream (protocol) can be run over a TCP/IP connection - aka TN3270 - and this is commonly used with mainframe computers today unsurprisingly very few would use a real physical terminal, when much more convenient terminal emulation is available for Linux, Windows and Mac. The OEC hardware is Arduino-based and in our case, we’ll be using this to interface with an emulated mainframe running on a Raspberry Pi 4.
#3270 emulator mac series
In this post, we now take a look at a rather neat open-source implementation of an “establishment controller” which is used to interface a 3270 series terminal with a mainframe. In a previous post, we took a fresh look at IBM 3270 and noted how this family of terminals is particularly interesting, working as part of a highly integrated system that allowed a mainframe computer to scale and serve thousands of users. Building the Open Establishment Controller interface and using this to connect a 3270 terminal to an emulated IBM mainframe running VM/370.
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