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reDIP CIA MOS 8520 Modern FPGA Replacement for Amiga Computers and 1581 FD
reDIP CIA MOS 8520 Modern FPGA Replacement for Amiga Computers and 1581 FD
reDIP CIA MOS 8520 Modern FPGA Replacement for Amiga Computers and 1581 FD
reDIP CIA MOS 8520 Modern FPGA Replacement for Amiga Computers and 1581 FD

reDIP CIA MOS 8520 Modern FPGA Replacement for Amiga Computers and 1581 FD

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reDIP CIA MOS 8520 Modern FPGA CIA Replacement Chips

For Amiga 500, 600, 1200, 1000, 2000, 3000, 4000, Amiga CDTV Computers and Commodore 1581 Floppy Disk Drive

Available Now at :  ToTs RETRO

reDIP CIA MOS 8520 has been tested with a Amiga 500, Commodore 1581 Floppy Drive, BackBit Chip Tester Pro, Amiga Test Kit, VATest Program and has scored a perfect 100% passing mark.

The reDIP CIA is an open source FPGA board created by: Dag Lem, a prominent coder in the Retro Commodore Community who's work is also featured in VICE 64 emulator.  This chip combines the following in a DIP-40 Package.

  • Lattice iCE5LP1K-FPGA
  • 1 Mbit FLASH
  • 5v tolerant I/O
  • Low Power Consumption

The reDIP CIA Provides an Open Source hardware platform for MOS 8520 CIA Replacements. 

  • The board is fully pin compatible with the venerable MOS 8520
  • Cycle Accurate emulation of the MOS 8520 has been implemented with very accurate TOD 
  • Gateware implementation made possible by Frank "androSID" Wolf and Dieter "ttlworks" Müller

 

The repository for this open source project can be found here: on GitHUB

This product has been made available under: 

CERN Open Hardware Licence Version 2
Copyright (C) 2025 - 2026 Dag Lem 

 

Any Questions Please Do Not Hesitate to ask.