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* * HARDWARE OVERVIEW * *


uTerm-S (micro-Term Stand-alone) is a legacy RS232 VT100-like terminal.

It is the stand-alone version of uTerm, the terminal board for the Z80-MBC2 (https://hackaday.io/project/165325).

uTerm-S has a VGA out and PS/2 keyboard connector, a RS232 port, a power supply and a "transparent" serial-USB port.


Here three uTerm-S in action durung a crazy experiment of a VHDL Z80 computer running MP/M with 4 concurrent users/terminal using my custom HW:




THE "TRANSPARENT" SER_USB PORT (J3)


The uTerm-S has a "transparent" USB-serial adapter connector, so you can e.g. use XMODEM to exchange files with a PC (running a terminal emulator that supports XMODEM file transfer) while the uTerm-S is in use.

Both the "mixed" power supply scenarios (USB-serial adapter not powered from USB but uTerm-S powered and vice-versa) are managed by the HW, so you don't need to worry about it. In the following photo a serial-USB adapter is connected with a cable to the transparent SER_USB port:


This allows to use two keyboards and two monitors in the "same" time (one keyboard and monitor attached directly to the uTerm-S, and another keyboard and monitor of the terminal emulator on a PC connected with the serial-USB).

Or you can use the monitor attached to the uTerm and the keyboard of the terminal emulator on a PC. Please note that the SER_USB port support both the RTS/CTS HW handshaking, so to use them both RTS/CTS signals are needed on the serial-USB adapter:





CHANGING THE RS232 SPEED (J1)


It is possible choose among 3 baud rate (the most common ones) using a jumper on J1 (AUX) as shown in the following image:



CHANGING THE COLOR (JP2-JP3)


It is possible choose among 4 colors (green, white, cyan, amber) for the output VGA signal. To select the color use the JP2 and JP3 jumpers. In the following photos are shown the setting for JP2 and JP3 to select the color as white or green respectively:




HOW TO FLASH THE STM32 WITH THE ST-LINK V2


The flashing procedure is the same of uTerm. So refer to the same paragraph of the uTerm page taking into account the here the SWD connector is marked J3 instead of J6.


Please see the main project page here.



Sep 04,2019
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    • jordanyte from UNITED STATES OF AMERICA
      Ben Jordan is a board level electronics and embedded systems design engineer. Always an avid tinkerer, Ben started with his first soldering iron at the age of 8, designing and etching his own PCBs soon after. Ben is an expert in EDA with Altium, Protel, CircuitMaker and CircuitStudio and has a Bachelor of Engineering (CompSys) Hon I. from the University of Southern Queensland, Australia. He is an IPC-CID+ certified PCB designer, and makes training videos for Altium Academy.
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      maker. I like to build things, to understand how things work. Co-founder of Ripolab Hacklab, a non-profit organization to explain the culture maker
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