Homebrew very compact Z80 board with CP/M

I have developed a very small Z80 board that is about the same size as the Z80 chip. CP/M works just by connecting the USB cable. The Z80 runs at 12MHz and communicates directly with a computer via USB.

Please refer to the following URL for details.
I'm sorry, but the URL below is written in Japanese. Please press the "English Version" button on the upper right of each page or use automatic translation.

1)USB serial support and pin assignment

2)Experiment with Boot ROM functionality

3)hello display

4)Schematic and pattern design

5)Implementation of operation monitor LED

6)Component mounting on PCB

@Z80 @Z80PicCompact @CP/M

[esra_erimez]

This is one of the most impressive things I've seen on YouTube. Incredibly well done. Thank you for sharing this. As a backend web developer, I feel like I missed such an important moment in computing history when microprocessors were coming into their own.

[TomTRobot]

Very good work. Have you considered moving your project and Gerber files to Github?

An interesting aspect of early CP/M systems is that the display terminal (or display unit and keyboard) and user storage were almost always more complicated and more expensive than the CPU, ram, and ROM for the main board. That relationship appears to continue to hold to this day.

[vanhetgoor]

If you add a 4 TB storage then you can save all programmes ever made for this kind of computer.

[kBashumUclugam]

The microcontroller in video reads data from a micro SD card and outputs it Z80?

[kenunix]

Are you going to make one for sale? Thanks.

[allobject]

Very very cool! I like it to be the real thing... Was thinking to go in a similar direction... and add FRAMs ###k x8Bit as disk instead of SD card or storage via USB. By memory mapping on boot it would run off of 0x0000 from FRAM, copy os (CP/M2.2) into RAM space and then switch over to RAM and keep FRAM as built-in file system - like boot from a floppy, but without seperate BIOS in ROM. Nothing wrong w. a comm chip to support terminal and also storage (FRAM) file transfer via USB. I'm aware of the goal to have minimum number of chips but simplicity in SW matters as much to me.

[zoeyzhang]

Happy to see your update! Not sure if any custom PCBs you may need for any upcoming content? If so, would love to supply freely, if possible, any cooperation together will be cool! (PCBWay zoey)