westfw / 4chipz80 Goto Github PK

The address pins of the EEPROMs are wired such that they appear at I2C address 0x50 and 0x52, instead of 0x50 and 051 as shown in the original schematics. This is easy enough to fix in the ATmega code that handles "disks":

#define EXT_EEPROM1 0x52 // I2C EEPROM 1 address (128kB))

Or, the address pins can be rewired on the bottom layer of the board by cutting traces and adding jumpers (the PCB layout is designed to allow this to be done "relatively easily.")

4chip z80 is available at pcbhubs as a shared electronics design for easy manufacturing order
https://pcbhubs.com/newpcb/16015422035f75983ba18a6

Hello, I would like to use this construction as a demo construction in my book about building homebrew 8bit computers. Is it possible? What about the license terms? Is it MIT, or CC-BY, or GPL? Can you please specify it?

Thanks

Martin