I finally got my new #rc2014 setup working, replaced the 7 MHz #Z80 cpu module with the SC111 #Z180 one and it's whoopin' fast at 18.43 MHz !! ... *vroom* 🏎️​

Had to move the I/O port of the RTC module to 0x40 since it would otherwise collide with the Z180's internal ports. As a result, I also had to build a new RomWBW image and adapted RTC.COM for CP/M to match the new RTC port.

I'm using the SC111 in "Replacement Mode", with the #BackPlanePro and the 512K #RomWBW module by RottenSnow - works great!

No photo because due to the fully packed arrangement of the modules on my backplane, you'd have a hard time spotting the new CPU module among the other eleven. And really: it's just my same old workstation you have already seen so often ... 🤷​

If I want to go back to 7.737 MHz I can just change the oscillator crystal and use the new CPU module at original speed. Nice! The board even comes with a seperate socket for a second crystal, so you can clock the Z180 serial ports seperately!

After several years incubating, the #NuttX #embedded #RTOS has finally graduated to become a top-level #Apache Foundation project!

Website: https://nuttx.apache.org/

I use it for several dayjob and personal projects. I like that it is very compatible with POSIX APIs, which means you can easily port linux-based apps.

It works on #ARM Cortex, #ESP32, #RISCV, and several others, including #Z180 and several other #Z80 derivatives.

And here's what drew you all here in the first place - CP/M running off this little pocket computer. 🤓​

Bonus: It can boot into Forth as well, which is sure to delight some of you as well!

The SC131 kit comes with a nice little case as well. But that's for tomorrow.

#electronics #Z180 #sbc #cpm #forth #retrocomputing

Here goes...

It lives! 😅​

#electronics #Z180 #sbc #retrocomputing

Supervisor/reset device and oscillator can in place. That's all the soldering done!

Cleaned up the board and did final sanity check before moving on to stuff those empty sockets.

#electronics #Z180 #sbc #retrocomputing

With all the passives mounted, connecting the USB-to-serial adaptor, which also serves as the power source, to do a few preliminary smoke tests.

All good. Next, the integrated circuits...

#electronics #Z180 #sbc #retrocomputing

First time I do a PLCC socket. Passable.

#electronics #Z180 #retrocomputing