Tag: ext in

2 matching upgrades

Showing 2 products.

StatusProductWhat it doesCompatibilityLinks
DiscontinuedChecked Jul 28, 2026FPGASIDby FPGASID project
sidsid replacement65818580fpgadual sidstereopaddlemouseext infirmwareplug in replacementdiscontinued

FPGA-based pin-compatible 6581 and 8580 replacement with two complete SIDs, six-voice stereo, analog inputs, paddles, and mouse support.

Human review confirmed on 2026-07-28 that the advertised KryoFlux store item is gone. The project documentation, firmware, and configuration software remain available, and used units can still be searched for. An interrupted firmware update can require JTAG recovery.

Sources
  • Commodore 64 Exact model
  • Commodore 128 Exact model
  • Commodore SX-64 Exact model
FPGASID project homepageSpecificationsInstallation guideSearch eBay for FPGASID
Find usedChecked Jul 28, 2026SwinSID Ultimateby CodeKiller / Hermit
sidsid replacement65818580paddlemouseext indip 28firmwareperiod upgradevintage

Period enhanced SwinSID replacement adds configurable 6581- and 8580-style sound, readable oscillator and envelope registers, analog input, and paddle or mouse support.

Production ended in 2018 and no current maker or build path was verified. Buy used only with the original manual and configuration software. The documented 6581-board installation recommends disconnecting the 1K output pull-down, while EXT IN needs the specified termination. This is unrelated to current Commodore 64 Ultimate hardware despite the old product name.

Sources
  • Commodore 64 Exact model
SwinSID Ultimate archive and manualDownload the user manualSearch eBay for SwinSID Ultimate