Apple IIc Plus upgrades

Adapts a W65C816 processor to a 65C02-compatible socket while generating the missing clock and synchronization signals.

For this system (stated family): The IIc Plus also uses a 65C02-family processor, but the vendor description does not explicitly enumerate the IIc Plus. Confirm processor socket, clearance, and timing before attempting installation.

The board was out of stock on 2026-07-24. It adapts processor signals but does not provide an independent accelerator clock; the stated 14 MHz is a board capability, not a promise that an Apple IIc will run at 14 MHz. Confirm socket type, clearance, and host timing before installation.

Connects and switches among four Apple II-compatible joysticks through a computer's external DE-9 game port.

For this system (bus/interface): Connects to the Apple IIc Plus external 9-pin game port. Select only the intended controller functions before use.

JCM showed two adapters in stock on 2026-07-24. The host connection is DE-9 only: despite accepting two 16-pin controllers, the adapter cannot connect to a computer's internal 16-pin game socket.

Converts the digital video expansion signals from an Apple IIc-family computer or Laser 128 to an HDMI-compatible output.

For this system (exact model): The JCM product page explicitly names the Apple IIc Plus video expansion port.

JCM showed 10 assembled units in stock on 2026-07-24. The product uses an HDMI-compatible connector, but the source does not claim audio output or universal display compatibility. Power down before attaching or removing vintage-computer video adapters.

Uses a phone, tablet, or laptop as a bridge from modern wireless controllers to an Apple II game port.

For this system (bus/interface): The receiver supports Apple II systems with a 9-pin game port. The IIc Plus provides that interface, but the maker's short model list names the IIc family rather than the IIc Plus separately.

The authorized ReActiveMicro listing was out of stock on 2026-07-24, and CT6502's former product URL returned 404. The maker information and manual remain available.

Replaces the power-supply PCB inside the Apple IIc Plus metal PSU enclosure with a modern universal-input supply.

For this system (exact model): This version is explicitly for the Apple IIc Plus internal power-supply enclosure. It replaces the old PCB rather than the computer's entire metal PSU assembly.

The product was in stock and backorderable on 2026-07-24. Installation exposes mains-wired power-supply parts; disconnect the computer from AC power and follow the vendor guide exactly.

Improved firmware for the Apple IIc and IIc Plus, offered as a current ROM programming service.

For this system (exact model): ROM 5X is for the IIc Plus. The product page says no jumper-pad changes are required, but the ROM chip must still be replaced. Its accelerator menu can retain settings and select a 1 MHz default.

Infinity Products listed its ROM 4X and ROM 5X flashing service without an out-of-stock marker on 2026-07-24. The open firmware project had a current March 2026 release.

Converts the Apple IIc family's digital video expansion output to 720x480 VGA.

For this system (exact model): The official manual explicitly supports NTSC Apple IIc Plus systems. Connect it with the supplied 15-pin cable and use a VGA monitor that accepts 720x480.

The vendor page listed A2VGA as out of stock on 2026-07-24. Its 720x480 output may not work with some older VGA monitors. Earlier hardware was NTSC-only, so confirm the revision when buying used. Do not connect it to an Apple IIgs or Macintosh merely because those machines also have 15-pin video ports; the manual warns that doing so risks damage.

Provides a daisy-chainable SmartPort hard disk backed by one to four ProDOS images on microSD.

For this system (exact model): The JCM page explicitly lists the Apple IIc Plus. Put non-SmartPort 3.5-inch drives before SmartPort devices and 5.25-inch drives after them.

Joe's Computer Museum showed 33 assembled DominoDisk units in stock on 2026-07-24. The Mini BurgerDisk page also exposes an assembled selector, while the public project supplies firmware, PCB, schematic, and enclosure files for a DIY build. Follow Apple's device-order rules in a daisy chain; a Liron card cannot drive a 5.25-inch drive.

Adds Wi-Fi networking and platform-specific peripheral emulation to several vintage computer families.

For this system (exact model): The Apple IIc Plus has native SmartPort support according to the JCM base-unit page. A matching physical connection kit is still required.

JCM showed 16 Apple II base units in stock on 2026-07-24. On 2026-07-27 Lotharek offered its assembled Atari Professional version both alone and with a dedicated SIO cable. It normally takes operating power from Atari SIO and uses USB-C for firmware flashing, although the page separately calls USB-C an optional power source for the 1200XL. The project also lists other small-batch vendors and open design files. Stock, enclosure, connection, power, and required interface hardware vary by computer.

Adapts a PC-style DB-15 analog joystick to the Apple II 9-pin game-port wiring.

For this system (stated family): The vendor's all-Apple-II claim covers the IIc Plus family. Use its external 9-pin game port and an analog DB-15 joystick.

ReActiveMicro showed the adapter in stock and backorderable on 2026-07-24. Original Apple II and II Plus computers expose an internal 16-pin game socket, so they need a separately verified 16-pin-to-9-pin connection before this DB-9 adapter can be used.

Replaces the General Instrument AY-5-3600-PRO keyboard encoder in several Apple computers.

For this system (bus/interface): JCM lists this encoder in its Apple IIc Plus category, but the product page names only the Apple IIc factory key map and does not report a separate IIc Plus test. Confirm that the installed part is an AY-5-3600-PRO-family encoder before replacement.

The current page offered jumper and socket selections on 2026-07-24. Original Apple II and II Plus support applies to non-Datanetics keyboards; Datanetics keyboards use the separate MM5740AAE replacement.

Adds flash-backed ProDOS volumes, a RAM disk, recovery ROM, clock, network transfer, and Applesoft enhancements inside an Apple IIc or IIc Plus.

For this system (exact model): The IIc Plus package includes a MegaFlash main board, replacement ROM, CPU riser, and instructions. Follow the model-specific installation documentation rather than reusing the original IIc procedure.

JCM showed assembled 128 MB Apple IIc units in stock on 2026-07-24, while human review found the separate assembled IIc Plus package out of stock. The family remains available through the IIc version. A system-ROM replacement is required. Early ROM 255 IIc boards may need W1 and W2 modification, and early spring-clip keyboards may need the low-profile stiffener for clearance.

Adds 1 MB of battery-backed RAM and a real-time clock to supported Apple IIc and IIc Plus logic boards.

For this system (exact model): Only the RamExpress II+ variant supports the A2S4500 Apple IIc Plus, using its memory-expansion connector. The A2S4000 variant is explicitly incompatible with the IIc Plus.

Both variants were out of stock on 2026-07-24. Open the computer and identify its model, ROM, logic-board layout, and memory-expansion connector before choosing a version. The A2S4000 version requires CPU removal and socket installation; an Apple IIc with ROM 0 must first be upgraded to ROM 1 through 4.

Converts NTSC composite video and analog audio from an Apple II or Apple III to an HDMI display.

For this system (exact model): The vendor explicitly lists the Apple IIc Plus for NTSC composite conversion.

The adapter was in stock and backorderable for $45 on 2026-07-30. It was not tested or intended for PAL systems. Simultaneously connecting a CRT and this adapter requires a composite impedance-matched switch box or video may degrade or disappear. The package includes generic composite, HDMI, audio-adapter, and power cables, but not a computer-specific Commodore A/V cable.

Connects a driverless USB HID game controller to an Apple II game-port interface.

For this system (bus/interface): Use the DB-9 option with the external game port. Bluetooth operation requires a separate dongle and updated adapter firmware.

Retro6502 showed an Add to Cart path at $80 on 2026-07-27 and described the product as made to order. Choose the connector option that matches the computer: DIP-16 is for an internal 16-pin game socket, while DB-9 is for an external 9-pin game port. Bluetooth needs a separate compatible dongle and updated firmware. Never install or remove an internal connector while the computer is powered.

Replaces Apple II system ROMs with in-system programmable banks selected from an on-screen menu.

For this system (exact model): ROMXc+ works in any Apple IIc Plus. Optional text and MAP ROM boards require socketed motherboard ICs, which are soldered in many systems.

All four current model pages offered an order path on 2026-07-24. Optional video and MAP ROM functions require the matching socketed ICs and cables; many compact Apple II systems have those chips soldered.

Provides SmartPort-compatible SD-card hard-drive emulation with an OLED display and button controls.

For this system (exact model): Requires the optional IDC20-to-DB-19 adapter and cable. Do not press SPIISD buttons during active disk access.

The standard and limited-edition pages listed current configurations without an out-of-stock marker on 2026-07-24. The limited shell version is explicitly a finite-quantity assembled variant of the same SPIISD V2 family.

Adds scan-doubled HDMI and VGA output to supported compact Apple II systems through their video expansion port.

For this system (exact model): Supports an NTSC Apple IIc Plus at its stock 4 MHz speed. The vendor warns that Tangy Pack does not work when the IIc Plus has been accelerated beyond 4 MHz.

Human review confirmed on 2026-07-24 that the normal product page blocks cart addition because Tangy Pack is out of stock. The earlier catalog URL response was not a usable ordering path.

Connects supported vintage computers to Wi-Fi BBSes through an RS-232 serial port.

For this system (stated family): The vendor says the modem was tested with all Apple 8-bit models using a proper cable. Use the IIc Plus serial port with a correctly wired Apple-to-RS-232 cable and provide external 5 V power.

The current Pro V2 model was in stock on 2026-07-30. It has a female DB25 connector, a color TFT screen, a printed case, faster interface buffers, and signal-state LEDs. It needs an external 5 V micro-USB supply, and the host may also need a gender changer, DB9 adapter, or correctly wired computer-specific serial cable. The older display-free and OLED WiModem232 models are discontinued and replaced by this version.