Commodore 116 upgrades

Replaces the CPU in Commodore 264-series computers and can add 512 KB of Hannes-compatible expanded memory.

For this system (exact model): The seller explicitly names the Commodore 116. Verify the CPU footprint, socket state, original DRAM organization, and CAS point before installation.

Lotharek marks the module discontinued. CPU-only use requires correct pin-1 orientation and a compatible socket or safe desoldering. Enabling the 512 KB expansion is invasive: remove the original DRAM and connect CAS to pin 15 on an eight-chip, 1-bit layout or pin 16 on a two-chip, 4-bit layout. Confirm the exact motherboard, CPU package, memory layout, and software's Hannes banking support before buying or installing a used module.

Current composite and S-Video cable options for compatible Commodore computers, with a five-pin composite branch that also serves selected Atari systems.

For this system (exact model): The five-pin composite cable and adapter explicitly list the C116. No independent evidence was found for using the separate eight-pin S-Video branch with this model.

The two five-pin products exposed Add to cart controls, while the eight-pin product exposed current priced options on 2026-07-30. The five-pin cable and adapter carry composite video and two audio connectors; those connectors do not create an independent stereo source in a stock mono computer. The eight-pin S-Video branch requires a host that supplies separate luma and chroma. Its stereo option requires a compatible second audio source on the designated extra pin. Match the connector, resistor, audio wiring, display input, and regional video standard before ordering.

Licensed, made-to-order recreation of the CMD hard drive with BlueSCSI v2 and externally accessible SD storage.

For this system (exact model): The seller explicitly lists the C116. Supply the required IEC cable and compatible external power supply.

ToTs RETRO exposed an Add to Cart path at USD 899.99 on 2026-07-27. Each drive is made to order with an advertised lead time of up to one week. Supply an IEC serial cable and a compatible 1581 or 1541-II power supply; neither is included. The seller has not tested simultaneous tape-drive use.

DIY diagnostic ROM and loopback harness for PAL and NTSC Commodore 264-family computers.

For this system (exact model): The maker explicitly tested the C116. Its 18-way keyboard FFC is difficult to duplicate safely, so the documentation recommends manual keyboard testing for casual use rather than inserting thick pin headers that may damage the socket. The cartridge or ROM and every loopback must be installed with power removed.

Rob Clarke's current download directory offered Diag264 0.97 on 2026-07-30. The maker also offers a programmed EPROM at media and postage cost by email. The software is CC BY-NC-ND 4.0: unmodified personal distribution with attribution is allowed, but modification and commercial resale are prohibited. The maker warns that some third-party marketplace copies were unauthorized or modified. Loopback hardware may be resold when the attribution conditions are met.

CPLD replacements for failed PLA chips, currently sold for Commodore 264-series computers and previously made for the C64.

For this system (exact model): The seller explicitly names the Commodore 116. Confirm a compatible socket, board revision, orientation, and clearance before installation.

The 264-series module exposed a login-or-register-to-buy path on 2026-07-27, while the separate C64 version is discontinued. Human review says the module plugs into the original socket, but the seller does not establish that every supported motherboard is socketed or document the original MOS part, board revisions, orientation, removal, or clearance. Treat it as a plug-in replacement only after confirming a compatible socket and orientation. A used C64 module needs the same checks.

Open PCB that exposes every Commodore 1530 Datassette connector line for Tapuino builds and cassette-port adapters.

For this system (stated family): The maker extends the adapter method to other 264-family computers that use a 1531 Datassette. The C116 is a 264-series model, but the README does not name it individually; verify its exact cassette connector and pinout before building the cable.

The repository provides the KiCad board, schematic, footprint, and documentation files and invites builders to fabricate the open hardware. PCBWay currently offers the 26.92 by 26.03 mm V2 design as a 1.6 mm, two-layer bare PCB and labels that shared project CC BY-SA 3.0. No connector, Mini-DIN lead, enclosure, Tapuino electronics, buffering, isolation, fusing, or current limiting is included or documented. Review the manufacturing files and wiring before ordering and connect hardware only with power off.

No-solder SRAM daughterboard that expands a Commodore 16 or 116 to 64 KB and can switch back to 16 KB.

For this system (exact model): The maker explicitly designed the board for the C116's original 48-pin TED socket as well as the C16. Installation is solderless, but the TED must be extracted and reinstalled carefully and the machine reset after changing memory modes.

Poly.play listed the board as out of stock on 2026-07-30. The earlier direct AmiBay sales thread is closed. Use PCB revision 1.4 or later: the maker reported an error in revision 1.2, refunded those boards, and said revision 1.4 was corrected and tested with Diag264. A reset is required after changing the 16 KB / 64 KB selection.

Family of IEC storage devices that lets supported Commodore computers access files and disk images on SD or other removable media.

For this system (exact model): The current NC92 SD2IEC LCD manual explicitly lists the C116. Its unit uses the IEC serial bus and external 5 V power; confirm that the selected hardware variant includes the correct serial cable and safe power adapter.

Retro Lemon listed its user-port-powered C64, C128, VIC-20, and SX-64 variant in stock at GBP 34.17 on 2026-07-27, and Sordan exposed a current Buy now path for its combined SD2IEC and Tapecart variant. PolyPlay's plain external Sordan Micro device and Retro Electronics' internal board were out of stock, while the RetroFletch backplane seller was on a break. A complete open C64 SD2IEC LP hardware build is also available. Variant power, connectors, controls, and firmware configuration differ. The official firmware site says 0.x firmware is obsolete and warns that newer-dated bootloaders are not necessarily safer or better.

Configurable replacement for failed 82S100-based Commodore PLA chips, with documented modes for selected C64, 264-series, PET, CBM-II, and 1551 hardware.

For this system (exact model): Remove all configuration jumpers and use socket U101. Power off and unplug the computer, preserve orientation, and handle the small adapter pins carefully.

Individual Computers' main product index, last modified in May 2026, lists SuperPLA V4 as a spare part while placing the older SuperPLA and V3 under Sold out. The current shop root also exposes a Super PLA V4 product image, but Tavily did not expose an exact product-specific cart or stock control on 2026-07-30. Confirm current orderability before buying. The underside jumpers and adapter pins are very small; use the official mode diagram, tweezers, bright light, and careful handling.

Adds SD mass storage to Commodore 264-series computers and can replace the paddle cartridge in a real 1551 drive.

For this system (exact model): The project explicitly supports the C116 through its expansion-port TCBM interface. Disk images are exposed read-only, while ordinary files support DLOAD and DSAVE.

The repository provides Gerbers, firmware, hardware instructions, and release files sufficient for a DIY build. The maker invites requests for a completed unit but does not advertise standing stock. Disk images are read-only, and the device does not reproduce a 1551 exactly. When a TCBM cable is fitted, both specified ground pins must be connected as documented.

Connects modern Bluetooth gamepads and, on selected models, mice to Commodore, Amiga, and Atari computers.

For this system (exact model): Eduardo Casino's open TED-series layout explicitly supports the C116. It needs a 1 mm PCB, an ESP32 Mini Kit, two mini-DIN plugs, and the published parts; its joystick numbers are swapped relative to the C64 firmware.

The official C64, A500, and 800XL Tindie pages were out of stock on 2026-07-30, although the project marks those models active and supported. CBMretro had equivalent cased C64/C128 and A500/A1200 hardware available at EUR 41.90; the original designer does not support third-party builds. Open hardware, firmware, and documentation remain available. The guide's original Unijoysticle tile is folded here as the retired WiFi predecessor: it needed a separately powered ESP8266 receiver and phone or desktop client, unlike the Bluetooth successor.