tiny homebrew Z80

[norwestrzh]

Here's a little Z80 that runs at 20 MHz. It has a compact flash interface that supports sixteen 8 MB "disk drives". Two serial ports via a ZILOG SIO/0 (one is used for the console). Best part is that it is so low power that it can run from the 5v from the USB console. No other external power supply needed!

Those old compilers that were so painful to run on a 4 MHz Z80? They are quite usable on this little SBC.

 

[Phil_G]

Nice to see something conventional rather than cpld sorcery
The circuitry looks similar to Tom Szolyga’s Z80SBC, (apart from the 393 clock divider)?
Re power, I find the 500mA/900mA of USB 2/3 is ample (amp-le, geddit?) for cmos boards