Apple II Plus upgrades

Adapts a modern PicoPSU and external power brick to the Apple II, II Plus, and IIe.

For this system (exact model): The maker explicitly lists the Apple II Plus. The adapter mounts with the original power-supply screws; verify every power connection before applying power.

Human review confirmed that the required A2 ATX core unit could be ordered on 2026-07-24, resolving the conflicting stock displays on the build-a-kit and standalone pages. The optional JCM power lead was also in stock, but it is not keyed and installing it backwards can destroy the power supply, computer, and attached hardware.

Generates digital video from Apple II display memory through an HDMI-compatible connector.

For this system (stated family): The card is sold for the slotted Apple II family and generates video from display memory. Check the firmware documentation for configuration and supported modes.

JCM showed 22 v2.0 cards and 20 v4.4 cards in stock on 2026-07-24. On an Apple IIgs, A2DVI displays only legacy Apple II modes; 320- and 640-pixel Super Hi-Res applications do not appear on its output. A v4.4 card runs only one selected firmware function at a time.

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 II Plus. Use the separate A2jc adapter to connect A2io to the computer's internal 16-pin game I/O socket.

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.

Connects a 9-pin Apple II joystick or A2io receiver to the internal 16-pin game I/O socket.

For this system (exact model): Plug the adapter into the internal 16-pin game I/O socket with the front and rear markings correctly aligned. It accepts a 9-pin joystick or the A2io receiver.

CT6502 marked A2jc out of stock on 2026-07-24. The direct product page remains available for setup instructions and restock notification.

Open hardware and software platform for building Raspberry Pi Pico-based Apple II peripheral cards.

For this system (stated family): Uses the Apple II slot bus, with function and installation determined by the selected firmware. Read that firmware's documentation before installation.

JCM showed 36 assembled A2Pico cards in stock with selectable preinstalled firmware on 2026-07-24. Choose the board and firmware together. The simpler A2Pico2Lite design uses a Pico 2 and omits the original A2Pico microSD slot. Unpowered USB OTG hubs can cause device problems, especially with mice.

Repurposes supported Raspberry Pi Pico Apple II video cards as a USB HID mouse interface.

For this system (bus/interface): Use a supported A2VGA or A2analog card and load the A2USB firmware appropriate for the computer's video standard. USB hubs are unsupported.

A complete setup needs a supported A2VGA Revision 1.6 or modified older A2VGA or A2analog card, a Micro-USB-to-USB-A adapter, and a driverless USB HID mouse. USB hubs are not supported. Installing A2USB removes the card's VGA function until different firmware is loaded. Remove the Pico or card from the Apple II before using BOOTSEL to update firmware, and choose the PAL or NTSC build with the appropriate 50 or 60 Hz interrupt default.

Period 5 MHz 8088 coprocessor card with optional fast memory and an 8087 socket.

For this system (exact model): The brochure explicitly discusses FTL operation on an Apple II Plus and requires 48K plus a Language Card or equivalent. The optional AD128K occupies a nearby slot.

This is a period product obtained used. The AD8088 has 2K of onboard RAM expandable to 8K; larger programs need the separate AD128K in a nearby slot, and the AD128K cannot operate by itself. The original package included FTL math acceleration and the MET event timer. CP/M-86 and MS-DOS support depended on separately supplied operating-system software. A system needs at least 48K, a Language Card or equivalent, a disk drive, and a display. An 8087 may require extra cooling or an empty adjacent slot.

Recreates the ALF Apple Music Synthesizer for composing and playing music from standard notation on an Apple II.

For this system (stated family): The vendor describes the card for an Apple II computer without enumerating models. Confirm software and slot requirements for the Apple II Plus.

The A2Heaven clone is currently listed as out of stock. The store provides an archived ALF MC1 brochure from the product page.

Rebuilds the electronics inside an original Disk II drive with a cleaner analog path, keyed cabling, write protection, and easier head access.

For this system (stated family): The refitted drive remains a Disk II device and needs a compatible controller. The analog board provides normal, always-writable, and always-write-protected jumper modes plus a visible write LED.

CT6502 offered the two-board set for direct ordering on 2026-07-24. The boards are not sold separately.

Recreates the Apple Disk II controller card with modern components and selectable 16-sector or 13-sector firmware.

For this system (stated family): Use it as a replacement Disk II controller, normally in slot 6. It preserves standard 16-sector behavior and can select optional 13-sector operation by jumper.

The current CT6502 catalog offered the assembled card for direct ordering on 2026-07-24.

Recreates Apple's controller for attaching 3.5-inch Apple floppy drives to slotted Apple II computers.

For this system (stated family): The vendor claims all Apple II computers. Install the controller in a compatible slot and verify that the chosen operating system supports the drive and media.

The controller was available on backorder with an Add to cart path on 2026-07-24. The page says all Apple II computers, but the product is an expansion card; slotless IIc models are not attached without separate interface evidence.

Recreates a Passport-compatible MIDI interface for music software on Apple II computers.

For this system (exact model): The product explicitly supports the Apple II Plus with at least 48K. It also requires a display, disk drive and controller, software, instrument, and two MIDI cables.

The store showed one card in stock on 2026-07-24. A complete setup requires a 48K or larger supported computer, display, floppy drive and controller, compatible MIDI software, a MIDI instrument, and two 5-pin DIN cables.

Vintage 16K Apple II memory board with power, read, and write activity LEDs.

For this system (exact model): The seller explicitly names the Apple II Plus. Populate the board with compatible 4116 DRAM and use the included-style logic-board ribbon cable.

The MacEffects listing said Sold out on 2026-07-24. The board does not include its required 4116 memory chips. The original manufacturer and exact board model were not identified, so compare photographs and connector details before buying a used example.

Replaces an Apple II or II Plus motherboard with a complete Rev 7 RFI clone.

For this system (exact model): The board is an exact clone of the final common Apple II Plus Rev 7 RFI design. Choose assembled or a kit requiring extensive soldering.

The current storefront exposed kit and assembled selectors on 2026-07-24. This changes an earlier Apple II to the later Rev 7 electrical and firmware configuration rather than preserving an original-revision board.

Adds RGBS and SCART video output to supported Apple II logic boards.

For this system (exact model): The vendor explicitly supports the Apple II Plus. Installation requires the model-specific jumper or wiring configuration and internal soldering.

The kit was out of stock on 2026-07-24. Installation differs by model and requires soldering inside the computer; follow the correct PAL or NTSC instructions.

Adds Software Automatic Mouth speech synthesis hardware to an Apple II.

For this system (stated family): The vendor describes the board for Apple II computers without a narrower model list. Confirm software and slot requirements for the Apple II Plus.

The assembled card was out of stock on 2026-07-24.

Moves an Apple II peripheral card outside the case for repair, development, and testing.

For this system (stated family): The extender follows the Apple II peripheral-slot interface. Use it as a temporary bench tool and observe the product's cable-length and power-rail cautions.

The extender was out of stock on 2026-07-24. The vendor warns that longer ribbon cables may cause unreliable operation; use it only with power off while connecting or removing cards.

Lets supported original-style Apple II computers use a USB keyboard.

For this system (exact model): The adapter explicitly supports the Apple II Plus keyboard interface. Use a USB HID 1.0 low-speed keyboard.

The adapter was out of stock on 2026-07-24. It supports only USB HID 1.0 low-speed keyboards, so many current USB keyboards may not work. The vendor explicitly says it is not compatible with the Apple IIe.

Generates crisp 640 by 480 VGA from Apple II video memory using a Raspberry Pi Pico bus-snooping card.

For this system (exact model): The upstream project is tested in Apple II Plus systems. Videx VideoTerm 80-column compatibility is available when configured with a VideoTerm in slot 3; the VGA card itself may use any slot.

JCM showed 36 assembled A2 VidGA cards in stock on 2026-07-24, with firmware choices for Apple II and II Plus or Apple IIe. RetroFletch's A2 Analog seller was taking a break on 2026-07-27; its published board has a critical VGA IDC footprint error, so the cable's red wire must face the motherboard. A2 Analog can also conflict with some accelerators, card autodetection, CFFA3000, and ROMX configurations. Infinity Products' SMC A][ VGA Mini was out of stock, and Laser's assembled Mark Aikens variant showed zero stock. Choose the exact hardware and firmware branch rather than treating every variant as interchangeable.

Period slot memory and bootable RAM-disk card with optional expansion and battery backup.

For this system (exact model): Applied Engineering explicitly lists the Apple II Plus. AppleWorks enhancements require a 64K system and 80-column display, and the card belongs in a peripheral slot other than slot 0 or slot 3.

This is the original period product, distinct from modern RamFactor-compatible cards. Used examples vary by board revision, installed memory, expander, ROM, and included software. It normally uses a peripheral slot other than slot 3; an Apple II Plus must not use slot 0. The IIgs treats it as RAM-disk storage rather than fast system memory. Verify any RamCharger, cable, and old battery hardware before applying power.

Period 3.6 MHz accelerator with a 65C02, 256K of high-speed memory, and optional 16-bit processor upgrades.

For this system (exact model): The original brochure explicitly lists the Apple II Plus. The optional 16-bit processor gives a 48K II Plus enough bank-switched memory to run ProDOS.

This is a period product obtained used and is distinct from TransWarp GS. Confirm the exact card revision, installed processor, diagnostics, and slowdown behavior before buying. The brochure says it works with most DMA cards, but a mixed vintage system still needs card-by-card verification.

Programs 16K, 32K, 64K, and 128K EPROMs from an Apple II expansion slot.

For this system (stated family): The vendor states that the programmer works in an expansion slot of any Apple II series computer. Check card height and software requirements.

The kit was out of stock on 2026-07-24. It is a tall card and requires soldering; verify physical clearance, software, and the exact EPROM type before use.

Recreates the Apple II Lego TC Logo interface card for controlling Lego Technic machines.

For this system (stated family): Uses an Apple II expansion slot and the external Lego 9750 Interface A, cable, power supply, and motors.

JCM showed 25 cards in stock on 2026-07-24. A working setup also requires a Lego 9750 Interface A with its IDC-20 cable and 9 V power supply, at least one compatible 4.5 V motor, and suitable Lego Technic parts.

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

For this system (stated family): Requires a compatible SmartPort controller such as Disk II plus SoftSP, Liron, or Liron Reborn. Observe the documented ordering of floppy and SmartPort devices in a chain.

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 CompactFlash and USB mass storage plus floppy-image mounting to slotted Apple II and Apple III computers.

For this system (exact model): The current product title explicitly supports the Apple II Plus. The supplied firmware menu selects among the preloaded ProDOS volumes.

ReActiveMicro showed an in-stock, backorderable Add to cart path on 2026-07-24. The included media is preconfigured, but user-supplied images and operating systems still need to be compatible with the selected computer.

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

For this system (stated family): The IDC20-to-DB19 variant is tagged for Apple II and Disk II use. It requires a compatible controller, drive, cable, and connector orientation.

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 a rear-panel DB9 joystick connector to an Apple II with an internal 16-pin game I/O socket.

For this system (exact model): Revision 1.1 reduces the plug board to clear Q3 on RFI logic boards. Joysticks that depend on a two-player adapter are unsupported.

Infinity Products marked the assembled adapter out of stock on 2026-07-24.

Switches an Apple II F8 ROM socket between its normal Auto-Start Monitor and a licensed RAM diagnostic ROM.

For this system (exact model): The design was developed and tested around an Apple II Plus F8 ROM. Apple IIe, IIc, and IIgs systems are explicitly unsupported.

The current Infinity Products page listed an assembled product without an out-of-stock marker on 2026-07-24. Personal-use fabrication files remain available under a noncommercial license; the Dead Test ROM has separate licensing terms.

Replaces a Disk II drive's single red activity LED with separate green-read and red-write indication.

For this system (bus/interface): Use only inside a compatible Disk II drive. The modification reports read and write activity but does not repair the drive electronics.

The current page exposed assembled and kit selectors with an Add to cart path on 2026-07-24. Host compatibility still depends on having a working Disk II drive, cable, and controller.

Adds an ESP32 coprocessor with switchable composite video, 8-bit audio, and microSD-backed software to slot-bearing Apple II systems.

For this system (exact model): The seller says the card was thoroughly tested on the Apple II Plus.

The MacEffects Apple II collection said Sold out on 2026-07-24. The card is not bootable: it needs a Disk II or SmartPort storage emulator, another supported block-storage card, or a physical floppy drive and blank disk. MacEffects was only the distributor and offered no technical support or warranty.

Preprogrammed selectable replacement for several 2 KB system and character ROMs used in early Apple II computers.

For this system (bus/interface): Use only where the motherboard has one of the documented 2 KB 9316 or 2716 system-ROM sockets. Confirm the exact board revision, ROM position, image, and operating-mode switch before power-up.

The MacEffects page said Sold out on 2026-07-24. Match the module's 9316 or 2716 mode to the socket. It does not replace the 2513 character ROM on pre-Revision-7 motherboards.

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

For this system (exact model): JCM explicitly says the Apple II Plus needs a SmartPort card plus a compatible I/O path. The DB-19 connection kit is separate when 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.

Adds the SoftSP ROM path needed to use a Disk II controller and SPIISD V2 in SmartPort mode.

For this system (exact model): The maker explicitly supports Apple II Plus, Europlus, and J-Plus systems. A Disk II controller or compatible 5.25-inch drive card remains required, normally in slot 6.

The current store listed bare PCB, kit, and assembled configurations without an out-of-stock marker on 2026-07-24.

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. A stock II Plus normally needs a separate adapter from its internal 16-pin game socket to the 9-pin connection used here.

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): Requires the separate DB9 Joystick 2 Plus adapter. That adapter was also out of stock at verification.

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): The Apple II Plus requires the separately sold DB9 Joystick 2 Plus adapter.

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): Supports Apple II Plus systems with a non-Datanetics keyboard. Choose the required jumper-header and socket options.

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.

Replaces the National Semiconductor MM5740AAE/N encoder used by Datanetics-style Apple II keyboards.

For this system (exact model): JCM explicitly supports an Apple II Plus with a Datanetics-style keyboard and MM5740AAE/N encoder. The optional socket does not eliminate the need for careful chip removal.

The current page offered socket selections on 2026-07-24. This version is specifically for systems using the MM5740AAE/N and a Datanetics-style keyboard; non-Datanetics Apple II keyboards use JCM's AY-5-3600-PRO replacement instead.

Recreates Mockingboard-A sound hardware and adds a vacuum-tube audio preamplifier.

For this system (exact model): The vendor explicitly lists the Apple II Plus. Install it in a compatible expansion slot and use software that supports Mockingboard-A hardware.

The assembled card was out of stock on 2026-07-24. It is Mockingboard-A compatible but does not provide speech synthesis.

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 II Plus. The Manila Gear version can be configured for the II/II Plus motherboard.

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.

Period CompactFlash and IDE mass-storage card that preceded the USB-capable CFFA3000.

For this system (exact model): The project explicitly supports the Apple II Plus. Use ProDOS-compatible volumes and confirm the card revision, slot, firmware, and system memory.

The original CFFA production runs are sold out, so acquisition is through the used market. Verify the exact board and firmware revision, included cable or media, and CompactFlash compatibility. CFFA v1.2 runs 1 through 3 have an ATA timing bug that needs CPLD logic 1.4 and three jumper wires. The published Revision 2.0B schematic omits a 33K pullup from U5 pin 27 to Vcc that was added during assembly. These generations are ProDOS mass-storage cards and do not mount DOS 3.3 floppy images.

Adds 128 KB of low-power Saturn-compatible bank-switched RAM to slot-based Apple II systems.

For this system (exact model): RAM128 explicitly supports the Apple II Plus and is best installed in slot 0, where most compatible software expects Language Card or Saturn memory.

The assembled Tindie card was out of stock on 2026-07-24 and had been sold out since March 14, 2025. The open repository provides schematics, KiCad files, Gerbers, and documentation. In an Apple IIe or IIgs this is not normal auxiliary or fast memory; only software that understands a Saturn-type card in a peripheral slot can use it.

Modernizes the Applied Engineering RAMFactor design with 1 MB or 8 MB of low-power Slinky RAM and battery-backed storage.

For this system (stated family): A2Heaven describes both capacities as Apple II Slinky RAM cards. Confirm slot, firmware, and software requirements for the Apple II Plus.

The 1 MB version showed one unit in stock on 2026-07-24; the 8 MB version was out of stock. A CR2032 is required for battery-backed use and is explicitly omitted from the 1 MB package because of postal restrictions.

Adds 128 KB of bank-switched RAM to an Apple II or II Plus through the slot 0 language-card connector.

For this system (exact model): RAMX128K explicitly supports the Apple II Plus through slot 0. Saturn-compatible software is required to address all eight 16 KB banks.

The product was available on backorder with an Add to cart path on 2026-07-24. Software must support the selected Saturn-style bank-switching scheme to use the full capacity.

Reads early Apple II 9316A ROMs in a modern programmer or replaces compatible 9316B and 2316B ROMs with a programmed EEPROM adapter.

For this system (exact model): Early II Plus boards can use 9316-series ROMs. Confirm the motherboard revision, chip type, socket position, and selected image before installing the EEPROM replacement.

The v1.2 Reader Adapter was in stock and backorderable on 2026-07-24. The EEPROM replacement page exposed selectable firmware options. Match the exact ROM position and image; these two adapters are not interchangeable.

Adds IDE mass storage to slotted Apple II computers with CompactFlash and external-drive options.

For this system (exact model): The 8-bit version explicitly supports the Apple II Plus and can use one CompactFlash device.

The current page exposed multiple selectable packages on 2026-07-24. User-supplied CompactFlash cards must comply with the original CF standard; the vendor warns that testing may be the only reliable compatibility check.

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 II Plus. PAL systems are untested and unsupported.

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.

Adds twelve-voice stereo synthesis with a Mockingboard-compatible mode to slotted Apple II computers.

For this system (exact model): The product page explicitly supports the Apple II Plus. The included two-pin cable mixes the motherboard's built-in audio into the card output.

The current storefront exposed assembled and kit selectors on 2026-07-24. Most software expects the card in slot 4 even though the hardware can operate in other compatible slots. Speech chips are optional; inserting an SSI-263 or equivalent backward will destroy it.

Replaces aging Apple II, Apple IIgs, or Apple III power supplies with universal-input modern hardware.

For this system (exact model): Select the Apple II/II Plus/IIe cable and enclosure option. Do not assume cable pinout from connector shape alone.

The current pages exposed Add to cart or selectable order paths on 2026-07-24. Match the DC output cable to the computer. The internal kit involves mains wiring; disconnect AC power and follow the installation guide exactly.

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

For this system (bus/interface): Use the DIP-16 option with a stock II Plus internal game socket. Confirm orientation before power-up.

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 installation manual explicitly supports the Apple II Plus. Configure slowdown for disk controllers, DMA, and other timing-sensitive cards.

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): Select ROMX for the Apple II Plus. Standard boards use the 93-series version; ReActiveMicro 27-series motherboards require the matching DIP-plug configuration or documented jumper.

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 a Disk II floppy drive with disk images stored on an SD card.

For this system (stated family): The vendor lists SDFloppy II for Apple II computers. The Apple II Plus needs a compatible Disk II controller card, suitable cable, and an available slot.

The assembled package was out of stock on 2026-07-24. It requires a compatible Disk II interface card and does not replace that controller.

SD-card floppy emulator for Apple II-series computers using an Apple II Disk Interface Card.

For this system (stated family): The seller specifies Apple II-series computers and requires a working Apple II Disk Interface Card plus a 20-pin ribbon cable. Treat the device as read-only, and never connect or disconnect it while the computer is powered.

Retro Electronics marked the assembled device out of stock on 2026-07-24. The SD card, 20-pin cable, and Apple II Disk Interface Card are not included.

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 emulation on the Apple II Plus. SmartPort use additionally requires a compatible Liron or SoftSP6 interface.

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.

Recreates the Saturn 128K bank-switched memory card for original Apple II systems.

For this system (exact model): The card is Saturn 128K compatible and uses the Language Card connector at slot 0. Its LEDs show memory read, write, and bank-switch activity.

The current Infinity Products storefront listed the assembled card without an out-of-stock marker on 2026-07-24.

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

For this system (exact model): When a Disk II or 5.25 Drive Card is present, a Grappler Minus or SoftSP interface is required. Other setups need a compatible IWM-protocol card such as a Liron.

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.

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

For this system (stated family): The vendor says SUPERPROTO works in all Apple II systems with a compatible expansion slot.

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.

Open 1 MB battery-backed RAMFactor-compatible memory card with a NoSlotClock-compatible clock and ProDOS restore image.

For this system (stated family): The manual explicitly discusses the Apple II Plus and requires installation in slot 1 through 7; slot 0 is not supported. Application use depends on RAMFactor support.

No current assembled seller was verified on 2026-07-24, but the GW4206B hardware, CPLD, firmware, documentation, and fabrication files remain public. A CR2032 is required for clock operation, retained RAM, and the restore partition. Replacing it erases RAM and resets the clock. Disable TimeDisk's clock when another NoSlotClock-compatible device is present. The USB updater requires 64-bit Windows 10 or later, including supported Boot Camp or Parallels configurations.

Recreates the Applied Engineering real-time clock and digital I/O card for Apple II computers.

For this system (stated family): The vendor describes the clone for the Apple II family. Confirm software, slot, cable, and X-10 peripheral requirements for the Apple II Plus.

The store showed one card in stock on 2026-07-24. The required battery is not included.

Displays the current head position of a compatible 5.25-inch Apple II floppy drive.

For this system (stated family): The vendor describes support for Apple II-compatible 5.25-inch drives. Compatibility follows the attached drive rather than an expansion slot in the computer.

The assembled monitor was out of stock on 2026-07-24. It requires a compatible 5.25-inch Apple II floppy drive and the included 20-pin cable.

Replaces an Apple II or II Plus keyboard and can also provide ASCII keyboard input for an Apple-1 or Replica 1.

For this system (exact model): The seller explicitly supports the Apple II Plus. The assembled keyboard or kit includes its encoder and connection ribbon; kit builders must configure and assemble the host connector and keymap correctly.

The ReActiveMicro page exposed assembled and kit selectors plus an Add to cart control on 2026-07-27, while also rendering a stock-notification control; confirm the chosen variant before ordering. The kit requires extensive through-hole soldering. Encoder connector placement and keymap jumpers differ by host. Project notes also document Revision 4.2 encoder diode-jumper errata.

Adds 10/100 Base-TX Ethernet with a W5100 hardware TCP/IP stack and support from several Apple II networking applications.

For this system (exact model): The maker supports an Apple II Plus only when it has the RFI motherboard revision or newer. Earlier Apple II and II Plus motherboards are not supported.

The maker's current order page accepts PayPal orders for one to four cards and email inquiries for larger quantities. A2RetroSystems is a part-time business, and U.S. postal orders have an additional tax-and-duty prepayment process.

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. An Apple II Plus also needs a compatible serial interface card; the WiModem232 Pro is not an Apple II slot card.

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): The seller explicitly lists the Apple II Plus. It requires an expansion slot and block-device-compatible software.

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.