I finally got my new setup working, replaced the 7 MHz cpu module with the SC111 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 and the 512K 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!

#rc2014 #z80 #Z180 #backplanepro #RomWBW

Last updated 3 years ago