Apple IIc upgrades

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

For this system (stated family): A2Heaven lists the adapter in its Apple IIc category and describes it for an Apple II computer with a 65C02-compatible processor socket. The page does not enumerate IIc logic-board revisions; confirm socket and physical fit.

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 external 9-pin game port. It does not use an internal 16-pin game socket.

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): Plugs into the rear video expansion port and was hand-tested by JCM on an Apple IIc before shipment.

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 (exact model): The maker lists the Apple IIc with its 9-pin game port. A supported phone, tablet, or laptop and a compatible wireless controller are also required.

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.

Modern microcontroller-based Apple IIc keyboard with mechanical switches, configurable backlighting, and a read/write activity indicator.

For this system (exact model): Modern replacement for the Apple IIc keyboard, including early hairpin-spring assemblies. Backlighting is configurable by keyboard commands or optional beta software.

The MacEffects page said Sold out on 2026-07-24. The source explicitly names the Apple IIc and presents the board as a replacement for unreliable early hairpin-spring keyboards; it does not claim Apple IIc Plus fit.

Restores spring-clip keyboard support while leaving clearance for internal Apple IIc expansion boards.

For this system (exact model): Fits the spring-clip Apple IIc keyboard and creates clearance for internal expansion boards. It is not presented as a universal replacement for every Apple IIc keyboard mechanism or case revision.

JCM showed 39 units in stock on 2026-07-24. It is intended for the Apple IIc spring-clip keyboard. Some case revisions require trimming plastic screw bosses, so inspect the exact case before installation.

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

For this system (exact model): ROM 4X is for the Apple IIc and is especially useful when replacing ROM 255. Installation requires replacing the ROM and changing solder jumpers W1 and W2 to enable address line A14; the work requires a soldering iron and a utility knife.

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 current design automatically supports NTSC and PAL Apple IIc systems through the video expansion connector. It can derive full-color VGA from a PAL IIc's digital signals even though that computer's normal composite output is monochrome.

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.

Period internal Apple IIc card combining 256K or 512K of memory with a Z80 processor for CP/M.

For this system (exact model): Applied Engineering's brochure explicitly describes Z-RAM as an internal Apple IIc card. It adds 256K or 512K, a Z80 for CP/M, and RAM-disk support.

This is a period internal card obtained used. The original package included RAM-disk software, a Z80 operating system, and CP/M documentation; verify that software and installation material are present. Opening the IIc and installing the board is required.

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

For this system (exact model): Compatible with SmartPort-capable Apple IIc firmware except ROM 255, which must be upgraded. The manual reports ROM 3 and ROM 4X tests.

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.

Connects a 20-pin IDC Apple II floppy cable to a compatible DB-19 disk port.

For this system (exact model): The product is explicitly designed for the Apple IIc 19-pin floppy port and accepts an IDC20 ribbon-cable connector.

The vendor page showed six units in stock on 2026-07-24. This is a connector adapter, not a drive emulator or controller; verify the attached cable, controller, and drive are electrically compatible before use.

Adds battery-backed date and timekeeping to a compatible Apple IIc memory-expansion card.

For this system (exact model): The vendor explicitly identifies dClock as an Apple IIc option. It installs into a DRAM socket on a compatible memory-expansion card rather than directly into the computer.

The dClock was out of stock on 2026-07-24. It is not a standalone IIc card: installation requires a compatible RamExpress or Apple IIc memory-expansion board with the required DRAM socket.

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

For this system (exact model): The JCM base-unit page lists Apple IIc ROM 0, 3, and 4 as natively SmartPort-capable. Use the required DB-19 connection hardware and follow the current quick-start guide.

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 claims all Apple II systems and designed the adapter to preserve clearance around adjacent cables.

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.

Provides a compact analog joystick for Apple II game ports, with kit and assembled configurations.

For this system (exact model): Connects directly to the IIc DB9 game port. The maker warns that strict full-range or perfectly centered behavior is not guaranteed.

The product page explicitly said Out of Stock on 2026-07-24. The center may measure around 150 instead of 128, and kit builders may need to add or remove capacitors and adjust the trimmer.

Compact Apple II paddle controller offered as an assembled unit or a beginner-friendly through-hole kit.

For this system (exact model): Connects directly to the Apple IIc DB9 game port. Controllers 0 and 1 can be daisy-chained for supported two-player games.

The storefront listed economy, standard, and fully assembled configurations without an out-of-stock marker on 2026-07-24. Newer PCBs carry a correction sticker for a November 2025 silkscreen error.

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

For this system (exact model): The Apple IIc factory key map is included. Confirm the failed part is a supported 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): Requires an Apple IIc with the memory-expansion-card connector and a system-ROM replacement. The JCM A2S4000 and A2S4100 version may require W1 and W2 logic-board work on an early ROM 255 machine; verify keyboard clearance.

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 battery-backed date and time without consuming an Apple II expansion slot.

For this system (exact model): Both product pages explicitly support the Apple IIc, but the clock does not fit when a RAM expansion card occupies the required space.

The ReActiveMicro version was in stock and backorderable on 2026-07-24; the Manila Gear version exposed selectable configurations and an Add to cart path. Neither design fits an Apple IIc or IIc Plus when a RAM card occupies the necessary space.

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): Use RamExpress II A2S4000 on documented A2S4000 ROM 0 or ROM 1 and compatible A2S4100 logic boards without the later memory connector. Use RamExpress II+ on A2S4100 ROM 3 or ROM 4 boards that have the memory-expansion connector. Inspect the board before ordering.

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 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. The adapter expects a standard driverless USB HID controller.

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.

Period 5 MHz 65C02 CPU replacement for the Apple II, II Plus, IIe, and IIc.

For this system (exact model): The manual explicitly supports the Apple IIc, but installation requires opening the case and replacing its processor. Follow the drive-timing and cache exclusions.

This is a period upgrade obtained used. The floppy-controller slot must run at 1 MHz or a diskette can be damaged; slots 5 and 6 default to 1 MHz, while other slots default to full speed. Slow DMA and some CP/M cards may need additional slowdown settings. Do not cache Apple SCSI, RamFactor, bank-switched ROM, or other hardware that the manual excludes. Installation requires removing a socketed CPU, and an Apple IIc must be disassembled.

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 but explicitly does not work in the IIc Plus. Its optional video-ROM board and MAP ROM require the corresponding chips to be socketed.

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.

Emulates Disk II, UniDisk 3.5, and SmartPort storage from an SD card with an STM32F411.

For this system (exact model): The project matrix explicitly supports Disk II and SmartPort operation on a ROM 4 Apple IIc. Boards older than Revision 3 need the documented trace modification.

The project README linked a current assembled eBay listing on 2026-07-27 and also publishes a complete build path. An innoelement assembled variant showed six units on Tindie, but that page simultaneously displayed a shipping rate and said it did not ship to the United States; confirm checkout availability before relying on it. Match the board revision, bootloader, and firmware: bootloader 0.15 has an Apple IIgs SmartPort problem, and boards older than Revision 3 need a trace modification for Apple IIc or IIgs use. Use a quality FAT32 SD card with 32 KB clusters. Never connect an ST-Link programmer while either USB or the Apple II powers the board.

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. A IIc with ROM 255 has no SmartPort support and needs a compatible ROM upgrade, which involves ROM replacement and W1/W2 solder-jumper changes.

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 NTSC Apple IIc systems through the video expansion port. Turn the computer off before attaching or removing the adapter and secure its screw terminals. PAL is unsupported, and some HDMI displays mishandle the nonstandard active image.

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 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.

Mounts as many as eight block-device images from USB storage or microSD through slot-card and Apple IIc CPU-socket versions.

For this system (exact model): Xdrive2c installs at the Apple IIc CPU socket and connects to its external sidecar. The seller supports ROM 03, ROM 04, ROM 4X, and custom ROMs. Early hairpin-keyboard systems may need a lower brace, and accelerator or Mockingboard combinations need the optional documented cable or adapter.

The original Xdrive page said Sold out on 2026-07-24, and the Xdrive2c page said Sold out on 2026-07-27. Each assembled product included a USB drive with software and its manual; a microSD card was not included. Installing the slot card backward can damage it. Xdrive2c supports ROM 03, ROM 04, ROM 4X, and custom-ROM IIc systems and can work with a Zip Chip, 65816 adapter, or MB4c Mockingboard through optional cables or adapters. Very early hairpin-keyboard IIc systems need plastic-brace removal or a compatible low-profile stiffener.