picoZ80: RP2350-Based Drop-In Z80 CPU Replacement with WiFi Management for Vintage Computers
By
rickcarlino
Master baker tier. Every paragraph earns its place on the tray.
Summary
The picoZ80 is a custom PCB designed as a drop-in replacement for Z80 CPUs in vintage computers. It uses an RP2350B microcontroller (dual-core 150MHz Cortex-M33) with programmable I/O state machines to provide cycle-accurate Z80 emulation. The device offers enhanced features including faster processing, more memory, virtual devices, networking (WiFi, Bluetooth), rapid application loading from SD card, and WiFi management capabilities. It's specifically designed for legacy Z80-based systems like the Sharp MZ-700, allowing modern upgrades while maintaining compatibility with vintage hardware.
Key quotes
· 4 pulledThe picoZ80 continues the tranZPUter theme, replacing a physical Z80 in a host or industrial computer with a faster CPU, more memory, virtual devices, networking (WiFi, BT), rapid application loading from SD card and WiFi management.
It is a custom PCB designed to drop directly into the Z80 DIP-40 CPU socket of any legacy Z80-based computer.
Rather than using a discrete Z80 processor, the board hosts an RP2350B microcontroller — a dual-core 150MHz Cortex-M33 device capable of running at up to 300MHz — whose programmable I/O (PIO) state machines take full control.
Cycle-accurate Z80 emulation using PIO for Sharp MZ-700 and other vintage computers.
You might also wanna read
Mirari Boards: Reboot of Next-Generation Amiga Hardware Platform
The article discusses the Mirari Boards project, which aims to reboot the next-generation Amiga dream by creating a new hardware platform th
mirari.vitasys.nl·5mo ago
Adafruit Fruit Jam: RP2350 Mini Computer for Classic Macintosh Emulation
The Adafruit Fruit Jam is a credit card-sized mini computer powered by the Raspberry Pi RP2350 microcontroller that runs classic Macintosh o
cnx-software.com·9mo ago
PD-64 C64 PSU: A Compact USB PD Replacement for the Commodore 64 Power Supply
Side Project's Lab introduces the PD-64 C64 PSU, a compact USB Power Delivery replacement for the original Commodore 64 power supply unit. T
theoasisbbs.com·6d ago
Windows CE 2.11 successfully ported to run on Nintendo 64 hardware via reverse-engineering project
A hobby reverse-engineering project successfully runs stock Microsoft Windows CE 2.11 on a real Nintendo 64 console. The project uses a cust
github.com·16d ago
Understanding the Super Nintendo's Hardware Architecture: Clock Signals and Component Synchronization
A deep-dive technical analysis of the Super Nintendo Entertainment System (SNES) hardware architecture, focusing on how its components work
A technical deep dive into Super Nintendo cartridge hardware: CIC, SRAM, and enhancement processors
The article explores the internal hardware architecture of Super Nintendo game cartridges, detailing how they contained more than just ROM c