What is it?

The Apple II VGA Adapter is an open-source add-on card for Apple II/II+/IIe computers that uses a Raspberry Pi Pico W microcontroller to capture video memory and output a high-quality VGA signal hackster.io . It supports multiple graphics modes including 16-Color 140×192, Monochrome 560×192 Double-HiRes, 80×48 Double-LoRes, and 80-column text modes. The hardware design files and firmware source code are available on GitHub under an MIT license, ensuring transparency and community-driven improvements. Hobbyists have verified compatibility across all Apple II models, with plug-and-play installation requiring no modifications to the motherboard.

Why did you make it?

Originally inspired by Mark Aikens’ AppleII-VGA project, ∀2 Retro Computing aimed to modernize the Apple II video experience and simplify connectivity to contemporary displays and networks. By integrating the Raspberry Pi Pico W, the adapter not only enhances display clarity but also unlocks firmware-definable “alternate function modes” like Wi-Fi modem and CP/M Z80 emulation. Many retrocomputing enthusiasts praise its ability to convert Apple II composite video bitstream into modern VGA formats, avoiding the low-quality composite displays of yesteryear。

What makes it special?

Unlike composite or RF outputs, this adapter delivers crystal-clear VGA video optimized for both 16-color and high-resolution monochrome modes. Its gold-plated PCB ensures reliable signal integrity and durable slot contacts. Firmware updates are as easy as dragging a file to the Pico’s bootloader, so new display modes, Apple IIgs color support, and network protocols can be added without new hardware. The inclusion of the Pico W’s Wi-Fi radio opens the door to retro networking, remote file transfer, and even turning your Apple II into a vintage-style web terminal.