Wanting to test some multi-user MP/M configurations, I've decided to make a VT100-like "stand-alone" terminal starting from the uTerm, the VT100 terminal for the Z80-MBC2 board.
I've decided to use THP parts (of course the STM32 is SMD only...) so it may be easier to build for others "retro" stuff too.
Here a first preview of the uTerm-S. In this version the "transparent" serial-USB port can manage the RTS/CTS HW handshaking (the RTS/CTS signals must be present on the serial-USB adapter):
Of course this is not enough. An other board must be done with at least a 4-ports (for 4 users/terminals) serial RS232 adapter for the "The Thing" board...