Pocket-sized retro computer in a small case running RomWBW CP/M

The Z80 microprocessor designed by Zilog powered some notable business PCs back in the mid 70’s to early 80’s, including the Osborne 1…

The V20-MBC2 is an easy to build V20HL CPU SBC (Single Board Computer). It follows the same "concept" of the Z80-MBC2 (<a target="_blank" rel="noopener noreferrer" href="https://hackaday.io/project/159973">https://hackaday.io/project/159973), with a SD as "disk emulator" and up to 1024KB <a target="_blank" rel="noopener noreferrer" href="http://RAM.It">RAM.It has an optional on board 16x GPIO expander, and uses common cheap add-on modules for the SD and the RTC options. It has an "Arduino heart" using an Atmega32A as EEPROM and "universal" I/O emulator (so a "legacy" EPROM programmer is not needed).It is compatible with the uTerm (<a target="_blank" rel="noopener noreferrer" href="https://hackaday.io/project/165325">https://hackaday.io/project/165325) and uCom (<a target="_blank" rel="noopener noreferrer" href="https://hackaday.io/project/165709">https://hackaday.io/project/165709) <a target="_blank" rel="noopener noreferrer" href="http://boards.It">boards.It is possible to use an 80C88 (CMOS version) too.