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uCom is out!

A project log for Z80-MBC2: 4ICs homemade Z80 computer

8MHz Z80, 128kB banked RAM, RTC, Disk on SD, Basic and Forth interpreters, CP/M 2.2 and 3, cross Assembler and C (SDCC) toolchains

Just4FunJust4Fun 05/29/2019 at 09:200 Comments

I've done a separate "project page" for uCom (RS232 add-on card for the Z80-MBC2) here.

The uCom board, as the uTerm VT100 board, has a "transparent" USB-serial adapter connector, so you can upload firmware to the Z80-MBC2 (using Arduino IDE) or load an Intel-Hex file (with iLoad) or use XMODEM to exchange files with a PC (running a terminal emulator that supports XMODEM file transfer) while the uCom is in use.

Both the "mixed" power supply scenarios (USB-serial adapter not powered from USB but Z80-MBC2 powered and vice-versa) are managed by the HW, so you don't need to worry about it.

uCorm can be mounted horizontally or vertically to the Z80-MBC2.

The 3D printed custom angled brackets .STL files are the same of the uTerm.






Here connected with a "vintage" RS232 terminal (Ampex 210 relabeled Kyber):

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