Major milestone: my hand-wired Z80 computer just executed its first code from ROM. Verified with an led array after bringing up the ROM, RAM, and address decoder.
The first heartbeat of the Zenadi Codex.
#Z80 #HomebrewComputer #RetroComputing #Electronics #DIYComputer
"This wasn't built by a magician. This was built by a wizard. A man who can actually do what magicians pretend to do." - my favorite line from The Prestige.
Hi, I am Zaiphirion. I am building a computer from scratch. This is the beginnings of a prototype called the Zenadi Development System. It uses dual Z-80 processors. It's still a work in progress.
I got the ROM decoders wired up (top left) The ram and rom for both CPUs. I still have a few things to wire up for the second CPU and then test it. The first CPU works, it can execute code in the ROM. I made it execute a familiar instruction to trigger certain lights to blink.
Every retro computer project needs a grimoire. Mine is a Zenadi Codex binder packed with pinouts and 74xx logic references.
#RetroComputing #HomebrewComputer #Z80 #Electronics #EmbeddedSystems #ComputerEngineering #Maker #DIYElectronics
Progress on the custom computer tonight:
✅ ROMs wired up
✅ RAM address lines connected
⏳ RAM data lines next
One wire at a time.
#Zenadi #ZenadiCodex #RetroComputing #HomebrewComputer #Z80 #Electronics #DigitalLogic #ComputerEngineering
