Tag: sid

Tests major Commodore 64 chips, ROMs, interrupts, controls, and external ports with a cartridge and loopback plugs.

Protovision announced that 64 Doctor was back in stock on 2026-07-21. The product page listed eight units at EUR 35 with a one- to two-week shipping estimate on 2026-07-30. A detailed 2019 review identifies Tim Harris of Shareware Plus as the licensed manufacturer and demonstrates the test sequence, but it does not establish equivalent sound-test behavior for an 8580 or replacement SID, the SX-64, or a C128 in C64 mode.

Replaces one SID socket with two or three emulated SIDs, or combines SID emulation with SFX Sound Expander-compatible FM synthesis.

The official store showed four ARM2SID variants in stock on 2026-07-28, priced from EUR 53 to EUR 58. Choose the cable, optional second socket, and host-specific version carefully. Additional SID and FM modes require the documented chip-select and audio connections; the optional second socket does not carry EXT IN.

Microcontroller-based plug-in replacement for a C64 or C128 6581 or 8580 SID with software configuration, updateable firmware, and analog control inputs.

The official Retrocomp product page showed more than 10 ARMSID v1f units in stock at EUR 34 on 2026-07-28.

Recreates a C64 as a complete FPGA-based keyboard computer with original peripheral interfaces plus HDMI, USB, microSD, Ethernet, and Wi-Fi.

On 2026-07-27, the breadbin BASIC Beige model exposed a Buy Now path and regional stock, while the slimline Commodore 64C Ultimate was a paid preorder scheduled for factory dispatch on September 15, 2026. The internal microSD card is sold separately. The externally accessible user port requires a separate adapter. Commodore warns that Ultimate64 and C64 Ultimate hardware and firmware are diverging; unsupported firmware can leave a machine nonfunctional and resulting damage is outside free support, warranty service, and replacement.

Turns a C64 or C128 into a stand-alone SID synthesizer with keyboard performance, real-time controls, MIDI support, and optional six-voice stereo.

Protovision showed 12 orange Cynthcart 2.0.1 cartridges in stock at EUR 38 with a one- to two-week shipping estimate on 2026-07-28. The maker also publishes ROMs and source for personal use, but does not permit third-party cartridge sales. The project page labels 2.01 current while also listing a 2.0.2 source reorganization, so check the included ROM revision if that distinction matters.

Adds four 8-bit digital audio channels with stereo output through the Commodore user port.

The Shareware Plus page was last updated on 2025-08-01 and then claimed email ordering, but it exposes no conventional store or current checkout path. HR-061 confirmed that the original maker URL is gone and closed with direction to stop pursuing the unread Mk2 path for now. Availability remains unknown; PCBWay says the author stopped sharing the Mk2 there.

Adds nine channels of OPL2-compatible FM synthesis to a Commodore 64 and can mix SID or other audio into its output.

The project page says all four production batches, totaling 360 cartridges, sold out. Commodore4Ever also showed its product page sold out on 2026-07-28, and Protovision's current music-peripherals category listed only FM-YAM cable accessories. Check the seller pages or used market for a restock.

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.

Open dual-SID board with mixed 6581 and 8580 support, runtime address selection, channel mixing, paddle compatibility, and stereo output.

The complete GPL-2.0 hardware, GAL, Gerber, and build documentation remains available. A Tindie assembled listing reported out of stock since 2020 but says the seller may assemble a unit on demand; treat that as a contact route rather than stocked availability. SID chips are excluded.

Combines an integrated MIDI interface with five cartridge-resident SID music applications for sequencing, synthesis, drums, and low-fidelity sample playback.

The official contact page reported MSSIAH in stock on 2026-07-28, and its online order workflow was live. The cartridge and software are one integrated product: its MIDI hardware cannot be used by other applications, no MIDI OUT is provided, and the ROMs are not sold separately. A monitor is effectively required, and saving needs a compatible drive or separate Savyour.

Period original SID chips restore authentic 6581 or 8580 sound when matched to the computer's motherboard voltage and filter circuit.

AMI64 offered soak-tested original 6581 and 8580R5 chips from GBP 97 on 2026-07-28. These are finite period parts even when a dealer has stock. Confirm authenticity, revision, test history, socket condition, motherboard voltage, filter components, and return terms. Installing a 9 V 8580 in a 12 V 6581 board can destroy it.

Connects an original or modern replacement SID module to an RC2014.

No SID is included in the base module, although the current listing offers a SwinSID option and a separate 8580 adapter. The main socket directly supports a 6581, SwinSID variants, and ARMSID; an 8580 requires the adapter.

Open FPGA hardware and gateware platform in a DIP-28 package for emulating 6581 and 8580 SID chips.

The official repository provides hardware and gateware, but this bounded pass did not verify a current assembled-product seller.

Cartridge-port second-SID family represented by current SID Symphony reproductions and a selectable-address 6581 SID Cart.

ToTs RETRO listed its ARMSID-equipped CMD reproduction as made to order on 2026-07-28. Shareware Plus also advertises its chip-less 6581 SID Cart from stock, but that page was last updated in January 2025; confirm that variant before ordering.

Adds an onboard emulation of the MOS 6581 or 8580 SID sound chip.

Surface-mount parts arrive assembled, programmed, and tested; the builder completes the through-hole kit. The default is 8580 emulation, changed to 6581 with a solder bridge. Paddle inputs and the SID voice-3 read registers are not emulated, and a decorative DIP28 chip is not included.

Partially assembled internal board for adding a second matching SID chip at $DE00 or $DF00.

The MSSIAH availability page reported the SID2SID circuit board in stock on 2026-07-28, and its order workflow includes SID2SID. SID chips, audio wiring, and an output jack are excluded. Shareware Plus separately advertises a parts pack without the PCB or SID chips while its remaining stock lasts.

Uses a Raspberry Pi cartridge to emulate memory, sound, cartridges, ROMs, and file-loading functions across several Commodore 8-bit systems.

The open project publishes Gerbers, BOMs, software, and case files for full-size and Zero boards. Retro-Updates' assembled Sidekick64 Zero was out of stock on 2026-07-27 and excludes the Raspberry Pi Zero 2. The maker calls the project a personal playground and warns that unsupported images, timing glitches, and unsafe cartridge combinations remain possible.

Adds one or two original SID chips with automatic model detection, selectable mono or stereo addressing, protected power, and a dedicated stereo output.

The official site reported the SIDFX bundle sold out on 2026-07-27 and says no more modules will be manufactured after its limited stock is exhausted. The separate C64 Reloaded MK1 and MK2 adapters are accessories for this same family and do not replace the unavailable SIDFX module.

DIY RP2040- or RP235x-based replacement for one or two 6581 or 8580 SID chips, with optional FM emulation and paddle or mouse input support.

Choose the hardware design and matching firmware together. The official project documents different DAC, PWM, connector, line-output, and host-interface arrangements plus a list of preassembled sellers. Multi-SID or FM modes need the documented address-signal wires. Never power the module from USB and the Commodore computer at the same time.

Internal stereo SID card sold for several C64-family computers with a connection cable and configuration jumper.

poly.play and human review reported the card out of stock on 2026-07-28. HR-056 found no additional public setup information, so confirm the required SID chips, addressing, voltage configuration, and installation procedure before obtaining old stock.

Current Lotharek redesign of the compact AVR-based replacement for a Commodore 64 SID sound chip.

The Lotharek page exposed a login-or-register-to-buy path on 2026-07-27. The independent nano SwinSIDb tutorial documents the reference design's settings: its J1 selects 6581 filtering when closed and 8580 when open, while J2 enables an output-load resistor for 8580 boards and is left open for 6581 boards. It also says the design lacks paddle analog inputs and external audio input. The seller does not state that its dual DIP switch maps identically, so obtain Lotharek-specific switch and orientation instructions before installation. The latest firmware identified by the tutorial is dated 2012; original development stalled, and the reconstructed archive warns that one unreleased firmware can glitch.

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.

Builds an integrated modern PET-compatible computer with selectable PET models, accelerated operation, enhanced color video, storage, audio, and current input.

No current assembled seller was verified. Revision 1.3A has public GPL-3.0 hardware files, but a build requires fine-pitch surface-mount assembly, separate FPGA and ROM projects, and programmed devices. The family documentation warns that boards, bills of materials, and firmware are moving to newer video timing and says to contact the maker before building.

Replaces a Commodore 64 motherboard with an FPGA-based board offering modern video, storage, networking, and emulated peripheral functions.

The official store still listed the Ultimate64 Elite-II out of stock on 2026-07-27. Its home page says the black short-board run is sold out and Commodore has taken over sales of its version of the board. Check both current vendors rather than assuming another 1541 Ultimate batch.

Compact SwinSID-derived 6581 or 8580 replacement with hardware mode selection and a higher audio-output level.

Tindie showed 10 units in stock at USD 38.88 on 2026-07-28, while AMI64 listed the same family at GBP 49. Tindie's extracted page gave contradictory US shipping information, so confirm destination eligibility before ordering. X-SID does not support paddles or a mouse, and neither seller publishes technical, firmware, or installation documentation.