Tag: prototyping

Small C64 prototyping boards for the cartridge port, user port, or a combined dual-port project.

The email-order page was last updated on 2025-01-01 and then said any combination was available, but it publishes no price, checkout path, schematic, pin map, bill of materials, design files, or protection details. Confirm present stock, the exact board variant, connector and header parts, case fit, and documentation before ordering. Treat every exposed power and signal line as unprotected unless the seller supplies contrary electrical documentation.

Cartridge-port prototyping board with a mini breadboard and jumper leads for building C64 circuits.

Poly.play listed SKU PP0057 at EUR 17 including German VAT but marked it out of stock on 2026-07-30. The page publishes no schematic, pin map, design files, license, buffering, isolation, fusing, current limit, or power-handling specification. Confirm a restock and treat every computer signal and power line as unprotected.

Historical C64 user-port board providing 32 general-purpose input and output connections.

A February 2021 demonstration points to former eBay item 333905309830, but the exact listing failed two Tavily extractions after the required 60-second retry and is logged as WF-065. No current hardware seller, board design package, manual, pin map, electrical limit, protection circuit, or hardware license was verified. Treat the board as a used-market find. The demonstrated LED bank uses 1K resistors and leaves VCC disconnected; that example is not a general electrical specification.

Current C64 and C128 user- and cartridge-port boards that expose labeled pins for prototyping and hardware development.

Commodore4ever exposes current priced product variants for separate C64/128 user-port and cartridge or expansion-port boards. The user-port page documents its labeled male header and intended test uses. The expansion-board title and board label say EPB and cartridge or expansion port, but its body mistakenly describes access to the User Port and does not enumerate its signals. Human inspection found these guide breakouts to be basic passive pin extenders with no visible active components. No buffering, isolation, fusing, or current limiting is documented; exposed computer pins should not be treated as protected. Syzygy's C64 user-port version is retired and needs its selected header rows soldered.

Historical breadboard adapters for prototyping through a Commodore control port or the VIC-20 expansion port.

C64 OS preserves the former $13 joystick and $19 VIC-20 listings, but no current product was exposed on Dorktronic's eBay profile in July 2026. The joystick item URL also failed two Tavily extractions after the required 60-second retry and is logged as WF-062. Treat both boards as used-market finds. Documentation was not included. Both designs expose computer power and signal lines directly; the VIC-20 feature explicitly warns that improper prototyping can damage the computer.

Compact cartridge-port prototyping PCB and breadboard-bridge kit for C64 hardware development.

Both email-order pages were last updated on 2025-01-01. The kit page then claimed stock, while the version 2 page gave no price or stock quantity. Neither page exposes a checkout route, pin map, schematic, design files, license, board-revision comparison, protection details, or complete included-parts list for a bare version 2 board. Confirm current availability and the exact PCB revision and package before ordering.

Provides a reusable prototyping card with an in-system programmable ROM for Apple II and Apple III hardware projects.

The current storefront exposed kit and assembled selectors on 2026-07-24. It is a development platform, not a finished peripheral; safe use depends on the user's circuit, firmware, power handling, and bus design.