The guys over at the Nightfall blog have made a video of their testing of Nobomi’s ARMSid (6581/8580 Replacement) and putting it through it’s paces.
They report that the sound is even better than the SwinSID Ultimate and that it’s a high quality design. Nobomi has also written software for Commodore 64 to configure the various ARMSid options and software to update the Firmware.