Apple II ProDOS Floppy Drive Emulator Card

What is it?

The Apple II Floppy Drive Emulator Expansion Card is a modern storage solution for Apple II, II Plus, IIe, and IIGS computers — powered by an Atmel microcontroller and built with authentic 27C256 EPROM and NEC 82C55AC-2 interface chips.

It replaces physical floppy drives and disks by allowing you to load and run disk images directly from dual Micro-SD cards. With support for up to 32 MB ProDOS volumes (requires 64 KB RAM or more), this card lets you store and instantly access 100+ disk images in .PO format — no spinning drives, no noisy seeks.

Why Was It Made?

Real Apple II drives are slow, unreliable, and disks are fading with time. This emulator gives you silent, instant, drag-and-drop access to your entire software library. Whether you're a collector, educator, or developer, you can now boot games, utilities, or massive ProDOS partitions in seconds — no alignment, no cleaning heads, no scratched media.

What Makes It Special?

• Dual Micro-SD Slots: Keep two separate libraries online — swap between them with a keypress
• Massive Capacity: Store 100+ disk images on a single card; run 32 MB ProDOS volumes when 64 KB+ RAM is present
• Authentic Hardware: Uses genuine 27C256 EPROM and NEC 82C55AC-2 for perfect timing and compatibility
• Universal Fit: Works in any slot on the Apple II, II Plus, IIe, or IIGS — no drivers, no firmware patching
• .PO Format Native: Boots standard .PO images instantly; includes a free Windows .DSK→.PO converter
• Instant Boot: Power-on to DOS or ProDOS prompt in under two seconds — faster than any physical drive
• Silent & Reliable: No moving parts, no head crashes, no media decay — your software library is safe for decades

Key Specifications

• Compatible systems: Apple II, Apple II Plus, Apple IIe, Apple IIGS
• Controller: Atmel microcontroller
• ROM: 27C256 EPROM
• Interface chip: NEC 82C55AC-2
• Storage: Dual Micro-SD card slots
• Max volume size: 32 MB ProDOS (requires 64 KB+ RAM)
• Disk image format: .PO (ProDOS Order); .DSK convertible via included tool
• Capacity: 100+ disk images per card
• Boot time: Under 2 seconds
• Slot: Any Apple II peripheral slot

Getting Started

Drop your .PO disk images onto the Micro-SD card, insert the card into the emulator, slot the card into your Apple II, and power on. You'll be at the DOS or ProDOS prompt in under two seconds. Use the included Windows utility to convert .DSK images to .PO format; other formats can be converted with common community tools.