Apple IIgs upgrades

Exposes two or four independent output channels from the Apple IIgs Ensoniq sound chip.

For this system (exact model): Both cards connect to the Apple IIgs Ensoniq audio path. 2soniq includes its J25 cable and needs powered stereo speakers. 4soniq needs four powered channels and compatible multichannel software; a second card is required for eight outputs.

The 2soniq was available on backorder and the 4soniq was in stock and backorderable on 2026-07-24. Two-channel output works with most IIgs software; four- or eight-channel use requires software written or modified for those modes and enough powered speakers.

Adds 4 MB of DMA-compatible memory to a ROM 01 or ROM 03 Apple IIgs.

For this system (exact model): The card explicitly supports ROM 01 and ROM 03 Apple IIgs systems, full DMA, and use with TransWarp GS or ZIP-GSX accelerators. The kit requires assembly.

Human review confirmed that the product page was in stock on 2026-07-24. The page describes kit and assembled variants, but the answer did not distinguish the stock state of each selector option.

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 IIgs external 9-pin game port. It switches analog controller signals rather than adding software support for otherwise incompatible controllers.

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.

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

For this system (exact model): JCM explicitly supports the Apple IIgs, but only for legacy Apple II display modes. Super Hi-Res 320- and 640-pixel output is not supported.

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 IIgs with its 9-pin game port. A supported phone, tablet, or laptop acts as the bridge to the wireless controller.

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.

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

For this system (stated family): JCM lists both A2Pico board variants in its Apple IIgs category. Select firmware that supports the IIgs and use a compatible Apple II slot; the card provides only the function implemented by the installed firmware.

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.

Recreates Apple's Revision C SCSI card with termination power and onboard active termination for improved drive compatibility.

For this system (exact model): The vendor explicitly lists the Apple IIgs. Revision A03 requires the patched GS/OS driver linked from the project documentation; do not assume an unpatched original driver will handle the fixed card ID.

The GGLABS Tindie store says the seller is taking a break and offers a return notification rather than a current order path. The project page provides software and technical material, but says parts of its pseudo-DMA and IIgs-mode schematic documentation remain incomplete.

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. Match slot settings, drive type, operating system, and media format to the IIgs.

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.

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

For this system (stated family): A2Heaven lists the extender in its IIgs category. 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.

Combines 8 MB of fast static RAM with an optional 512K boot ROM and built-in IIgs debugging software.

For this system (exact model): The product is explicitly an Apple IIgs memory and ROM card. It provides 8 MB of 70 ns fast RAM and a 512K ROM option with preloaded utilities.

The card was out of stock on 2026-07-24. The optional ROM portion makes the assembly wider than a plain memory card; check clearance around long slot cards, especially in slot 7.

Connects an Apple IIgs serial port to MIDI instruments using Apple A9M0103-compatible software.

For this system (exact model): The vendor explicitly supports the Apple IIgs. Connect the system cable to the modem or printer serial port required by the chosen software.

The interface was out of stock on 2026-07-24. It requires compatible MIDI software, a MIDI-equipped instrument, and two 5-pin DIN MIDI cables.

Converts a ROM 00 Apple IIgs to ROM 01 with a removable replacement ROM module.

For this system (exact model): Use only in a ROM 00 Apple IIgs that needs ROM 01 compatibility. The adapter is removable and leaves slot 3 usable with the named accelerator cards.

The ReActiveMicro adapter was in stock and backorderable on 2026-07-24. Garrett's Workshop's alternative Tindie module was out of stock and had been sold out since August 31, 2024. These are ROM 00 to ROM 01 conversions, not ROM 03 upgrades.

Adapts Apple IIgs analog RGB and composite sync to a 15 kHz-capable VGA connector.

For this system (exact model): Connects to the Apple IIgs RGB port without the older motherboard jumper modification. The display must accept the computer's 15 kHz scan rate; the adapter does not upscale it.

The adapter was in stock and backorderable on 2026-07-24. Most ordinary VGA monitors do not accept 15 kHz video; verify the exact display before ordering.

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

For this system (exact model): Only the A2 Analog branch supplies this relationship, and V2Retro describes its Revision 1 IIgs support as partial. The card cannot qualify 16- or 24-bit addresses, so accesses outside shadowed Apple II video memory can produce visible glitches.

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.

Adds a reprogrammable, four-bank ROM adapter for ROM 0 Apple IIgs systems.

For this system (exact model): The product is explicitly intended to let a ROM 0 Apple IIgs use ROM 1 or the other included firmware images. The vendor explicitly warns that it is not a ROM 3 upgrade.

The adapter is currently listed as out of stock. It cannot convert a ROM 0 or ROM 1 Apple IIgs to ROM 3.

Provides ProFile-style block storage from a raw SD card for enhanced Apple IIe and Apple IIgs systems.

For this system (exact model): The project reports testing on a ROM 01 Apple IIgs with GS/OS 6.0.4 and ProDOS. Prepare the raw SD layout and volumes before use.

The repository publishes binaries, firmware, VHDL, schematics, layout files, Gerbers, and a bill of materials, but no explicit license was verified. Capacity is limited to four 65,535-block volumes, or about 128 MB total. Under ProDOS, programs on the third and fourth partitions have a documented launch problem. This is a build project rather than a current assembled product.

Combines a 14 MHz 65816 accelerator, 14 MB memory expansion, HDMI output, RAM disk, and SD-backed drives for the Apple IIgs.

For this system (exact model): The current v2 listing explicitly supports ROM1 and ROM3 Apple IIgs systems; it does not explicitly promise ROM0 compatibility. On some ROM0 or ROM1 motherboards, capacitor C39 can prevent the board from sitting flush, so inspect clearance and follow the maker's instructions rather than forcing installation.

The regular AppleSqueezer GS v2 listing was out of stock on 2026-07-24. A separate preorder tile remained visible, but an active preorder order path was not verified; check the shop or mailing list for another production run.

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 IIgs. The brochure describes RamFactor as RAM-disk storage on the IIgs rather than ordinary fast expansion memory.

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.

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

For this system (stated family): The vendor lists the programmer in its IIgs category and describes it for any Apple II series computer. Check physical clearance 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): JCM lists Blocko in its Apple IIgs catalog. It recreates the legacy Apple II Lego interface rather than an IIgs-specific control system.

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.

Open hardware SCSI emulator with SD-backed storage, optional Wi-Fi networking, and host-side management tools.

For this system (exact model): The official compatibility guide reports working IIgs setups with Apple Rev C, RAMFast Rev C and D, Apple Hi-Speed, CMS II, GGLABS, and FoxSCSI cards. The IIgs needs one of these or another compatible SCSI controller plus the correct narrow-SCSI cable, power, termination, disk image, and driver setup.

Current seller checks on 2026-07-27 found a $39 internal 50-pin Pico 2 W kit, a $49 assembled external DB-25 model, a $49 PowerBook model, and a $59 assembled Ultra Narrow 50-pin model at authorized seller ToTs RETRO. JCM also carried assembled Ultra hardware and model-specific Macintosh adapters. Prices, stock, included media, and support differ by seller. Ultra models require Berg or Molex power and cannot run from SCSI termination power. The initial Ultra hardware release is not yet open hardware, although its firmware remains GPL; the project says hardware licensing will open later.

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

For this system (exact model): The manual reports testing on an Apple IIgs ROM 01. Follow its daisy-chain ordering rules, especially when mixing 3.5-inch, SmartPort, and 5.25-inch devices.

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 IIgs. The supplied CompactFlash card includes several GS/OS volumes as well as ProDOS 8 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.

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 IIgs.

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.

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

For this system (exact model): The Apple IIgs has native SmartPort support according to the JCM base-unit page. FujiNet emulates SmartPort disks, read-only Disk II images, CP/M, clock, modem, and a network device.

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 modern PicoPSU and external power brick to the Apple IIgs.

For this system (exact model): The maker explicitly describes GS ATX as an Apple IIgs power-supply replacement. Select all required components; the inexpensive switch or power lead is not a complete replacement.

The required core unit was out of stock on both its own page and the build-a-kit selector on 2026-07-24, so the available switch and PicoPSU cannot make a complete GS ATX replacement. The power lead's own page showed stock even though the build selector did not.

Converts Apple IIgs 15 kHz analog RGB to YPbPr component video for compatible televisions.

For this system (exact model): GS2HD is designed for the Apple IIgs analog RGB output and converts it to YPbPr component video. Confirm that the intended television accepts 240p over component.

The GGLABS Tindie store was taking a break on 2026-07-24, so no current order could be placed. The display must have component inputs and explicitly accept 240p; GS2HD does not upscale the IIgs signal to a modern scan rate and does not provide HDMI.

Adds a Microsoft SoftCard-compatible Z80 processor for running CP/M, with an optional turbo mode.

For this system (exact model): The current product listing explicitly supports the Apple IIgs. Set the selected slot to Your Card or Own Card. The current A03 revision does not require switching the IIgs to slow mode.

The GGLABS Tindie store was taking a break on 2026-07-24, so no current order could be placed. Turbo mode requires a CMOS 65C02 or 65C816 host; systems with an NMOS 6502 must use normal mode.

Runs PCPI Applicard-compatible CP/M software on a dedicated 20 MHz Z80 with 512K of onboard RAM.

For this system (exact model): The current listing explicitly supports the Apple IIgs. Use software compatible with the PCPI Applicard architecture.

The GGLABS Tindie store was taking a break on 2026-07-24, so no current order could be placed. This card is PCPI Applicard-compatible, not Microsoft SoftCard-compatible; choose CP/M software and disk images for the Applicard environment.

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. The adapter connects through the IIgs 9-pin game port and does not add software support for incompatible controller protocols.

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.

Exposes the Apple IIgs Ensoniq chip's native stereo channels through a rear-panel audio output.

For this system (exact model): LiteSound explicitly supports the Apple IIgs and applications using the Ensoniq chip's stereo capability. It can use any slot for power. Use the included sound-chip interface cable and installation instructions; do not tie the J25 analog ground to digital ground because the project warns that this introduces noise.

The JCM-1 page showed an in-stock Add to cart path on 2026-07-24. The project reports a harmless shutdown chirp with the ReActiveMicro power supply and says other aftermarket supplies may behave similarly.

Actively converts classic Macintosh DB-15 video sync signals for use with compatible VGA displays.

For this system (exact model): The maker explicitly supports the Apple IIgs, but the destination display must accept its 15 kHz video timing. The physically similar Apple IIc video connector carries different signals and is not compatible.

The BMOW store still showed the $39 Sync-inator as sold out on 2026-07-27. A monitor must still support the source resolution and scan rate.

Combines two Mockingboards, one ALF music card, and four S.A.M. DAC channels on one Apple II audio card.

For this system (stated family): The vendor lists MEGA Audio in the Apple IIgs category. It occupies an Apple II slot and emulates legacy Apple II audio cards; software expecting SSI-263 speech is not supported.

The store showed Add to Cart with one base-card option and one optional bar-graph panel in stock on 2026-07-24. MEGA Audio emulates two Mockingboards but does not emulate their SSI-263 speech chips.

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

For this system (exact model): The vendor explicitly lists the Apple IIgs. Use Apple II software that supports Mockingboard-A hardware and account for the card's physical height and tube assembly.

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

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

For this system (exact model): The project explicitly supports the Apple IIgs. Match the storage layout and operating system to the older CFFA generation rather than following CFFA3000 instructions.

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.

Provides hardware-assisted assembly-language tracing and debugging for the Apple IIe and Apple IIgs.

For this system (exact model): DDT16 explicitly supports the Apple IIgs and 65816 debugging. Select the IIgs firmware and required IIgs support-parts option.

A2Heaven showed two Apple IIe firmware options and one Apple IIgs option in stock on 2026-07-24. ReActiveMicro also exposed assembled and kit selectors for its licensed reproduction. Select the correct DDT8 or DDT16 firmware; IIgs use requires the appropriate support logic.

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

For this system (exact model): The IIgs relationship is limited to software that can use a Saturn-type card in a peripheral slot. RAM128 does not replace a IIgs fast-memory expansion card.

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.

Adds selectable 4 MB or 8 MB of low-profile SDRAM fast memory to an Apple IIgs.

For this system (exact model): Installs in the Apple IIgs fast-memory expansion connector. GWRAM.SYSTEM selects fully DMA-compatible 4 MB or partially DMA-compatible 8 MB; DMA cards cannot access memory above the first 4 MB.

The assembled Tindie card was out of stock on 2026-07-24 and had been sold out since June 17, 2025. The repository retains hardware, programmable-logic, documentation, and fabrication sources. Select 4 MB when every byte must be DMA-accessible; at 8 MB, only the first 4 MB is DMA-compatible.

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 lists both RamFactor capacities in its Apple IIgs category. They use the Apple II slot interface and selectable original or Apple firmware; confirm application support for Slinky RAM on the IIgs.

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.

Period high-speed SCSI controller with an onboard processor, DMA, cache, and ROM-based disk utilities.

For this system (exact model): The documentation explicitly supports the Apple IIgs. Install it in any suitable slot except slot 3, set that slot to Your Card, and use the GS/OS driver appropriate for the controller and media.

This is a period controller obtained used. Confirm whether the board is Revision C or D and which ROM it runs. Revision D does not use DMA in a IIe, while Revision C needs its documented IIe switch setting. SCSI ID, termination, terminator power, cable length, drive power, and backups all require care. Compatibility problems are documented with some accelerator and memory-card combinations; ROM 3.01E and 3.01EZ have a tape-restore bug corrected in later firmware.

Adds either 4 MB or 8 MB of low-power fast RAM to an Apple IIgs.

For this system (exact model): Both RAMGS/4 and RAMGS/8 are explicitly compatible with ROM 01 and ROM 3 Apple IIgs systems and plug into the 44-pin dedicated memory-expansion slot.

The GGLABS Tindie store was taking a break on 2026-07-24, so neither capacity had a current order path. Choose one capacity; both occupy the dedicated memory slot.

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

For this system (exact model): Select the Apple IIgs firmware version. It can boot GS/OS and supports two CF or IDE devices, unlike the single-device 8-bit Apple II version.

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.

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 IIgs for Apple II software using Phasor or Mockingboard audio.

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.

Recreates and modernizes the TransWarp GS accelerator for ROM 01 and ROM 03 Apple IIgs systems.

For this system (exact model): The redesigned accelerator is explicitly tested on ROM 01 and ROM 03 Apple IIgs systems. The vendor recommends a healthy modern power supply. Cache, GAL, oscillator, and cooling upgrades must be matched to the desired clock and board revision.

The current page described a presale and warned that IC shortages could delay delivery on 2026-07-24. ReActiveMicro reports ROM 01 and ROM 03 testing; it does not claim ROM 00 support. Faster oscillators increase stability and cooling demands.

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

For this system (exact model): Select the Apple IIgs DC cable. The family is also recommended by ReActiveMicro for high-speed TransWarp GS systems.

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 DB-9 option with the IIgs game port. This is an interface-level relationship rather than a product-page model test.

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.

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 the Apple IIgs. Use bootloader 0.14 or 0.16 rather than 0.15, and apply the documented modification to boards older than Revision 3.

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 DB-19 adapter. Use firmware 2.02 or later to avoid the earlier IIgs timing issue; if detection fails, remove competing boot devices and set Startup Slot to 5 or Auto.

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's all-Apple-II claim includes the slotted IIgs. Prototype logic must remain compatible with the IIgs slot and timing behavior.

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 maker describes TimeDisk for slot-based Apple II-series systems. It is RAMFactor-compatible peripheral-card memory, not IIgs fast memory; confirm application and slot compatibility.

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.

Replaces the ball mechanism in an original Apple ADB Mouse or ADB Mouse II with an adjustable optical sensor while retaining the ADB interface.

For this system (exact model): TT Design explicitly tested the optical board on an Apple IIgs, the first Apple system to use ADB. Use only a supported original ADB Mouse or Mouse II shell.

Both $72.99 variants were out of stock on 2026-07-27: the Mouse II board since May 25 and the original wedge board since July 18. Match the replacement to the exact shell and board shape before ordering. The original ADB cable is required, and installation may require moving its four wires or connector. The USB-C connector changes settings and firmware; it does not turn the mouse into a USB device.

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 states compatibility with every Apple IIgs model. Install the card in a compatible expansion slot and use networking software with Uthernet II or W5100 support.

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.

Breaks out Apple IIgs power-supply voltages for internal fans, sound cards, drives, and other projects without cutting wires.

For this system (exact model): Use only with the documented ROM 00 or ROM 01 power-supply arrangement. The board supplies power connectors but does not include the fan, drive, sound card, or other powered project.

ReActiveMicro reported the board out of stock on 2026-07-24. The documented version is for ROM 00 and ROM 01 Apple IIgs systems; ROM 03 support was described as forthcoming rather than current.

Adds HDMI video output and Apple IIgs-derived display modes to Apple II slot computers.

For this system (exact model): The manual explicitly supports the Apple IIgs. ROM 0 and ROM 1 systems require slot 3; ROM 3 systems can use slots 1 through 6. VidHD can select either Apple II artifact colors or the IIgs RGB palette for 8-bit display modes.

The product page supplies the current manual, firmware, support email, and an instruction to email BitPair LLC to check board availability. It does not expose current stock or a direct order path, so availability remains unknown.

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 a correctly wired IIgs modem-port cable or adapter 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.

Shares one basic ADB keyboard and mouse among as many as four retro-computer hosts.

For this system (bus/interface): JCM lists WOOTSwitch in its Apple IIgs category. The product page describes generic ADB keyboard and mouse switching rather than a separate IIgs test, so use only basic ADB peripherals and follow the current power guidance.

The current product page offered build-it-yourself and fully assembled selections on 2026-07-24. Only basic ADB keyboards and mice are supported. The firmware remains under active development and the maker warns that bugs remain.

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 IIgs. Match the slot setting and operating system to a block-device card.

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.