Tag: kit

Adds one or two modern 115200-baud serial ports supported by RomWBW.

Current listings cover one-port and two-port layouts for Standard or Enhanced Bus. RomWBW 3.4 supports the hardware, with 0xA0 or 0xA8 used for added ports; 3.5 and later also support 0x80 and 0x88. More than four serial ports needs a custom RomWBW build.

Adds up to the Z80's full 64K addressable RAM with selectable start address.

Current kits are offered with 32K or 64K and Standard or Enhanced Bus headers. The listing is for the memory module only; a CP/M setup also needs the documented Pageable ROM and other core modules.

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

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.

Adds banked memory for running RomWBW, CP/M, and Z-System.

The current kit is the memory configuration used by RC2014 Zed and Zed Pro. It replaces both separate ROM and RAM modules in a Classic II or Pro; a Mini can use it only after its onboard ROM and RAM chips are removed.

Adds a directly programmed 8x8 LED display for graphics and animation.

Current kits offer several red, blue, or white display styles, or no matrix. A diffuser is included. Other 32x32 mm, 16-pin common-cathode matrices can be used if their electrical and physical layout matches.

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

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.

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

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.

Adds bootable RomWBW storage and FAT32 file exchange on USB flash drives to supported RC2014 configurations.

RomWBW 3.4.0 or later is required. The project recommends newer branded USB sticks of at least 1 GB because some older, smaller, or unbranded media are unreliable.

Adds solid-state CompactFlash storage for CP/M or RomWBW configurations.

The fine-pitch CompactFlash socket can be supplied loose with an optional stencil or pre-soldered and tested. Standard RC2014 BASIC cannot access this storage. CP/M requires the documented Pageable ROM and 64K RAM configuration, while RomWBW uses a 512K ROM 512K RAM setup.

Adds eight pushbutton inputs and eight LED outputs.

The current listing is a complete kit, with a bare PCB offered through the vendor's grouped PCB listing.

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

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 a battery-backed clock for timekeeping and file timestamps on supported RC2014 systems.

The current kit is offered with or without the DS1302 IC. A CR2032 backup battery is required but is not included.

Adds selectable CPU and peripheral clock rates plus supervised power-on reset.

Current kits include a 7.3728 MHz single-speed version and a multispeed version. A DS1233 reset monitor holds the CPU in reset while power stabilizes and a button provides manual reset. The optional manual clock switch is not supplied.

Adds two 8-bit, 0-to-5 V analogue inputs for paddles, sensors, and experiments.

The current kit includes the module parts but no paddles or other input circuits. Inputs are not tolerant of voltages above the 5 V reference or below ground; add protection when measuring an external signal. A fresh conversion may require a dummy read before reading the result.

Connects an RC2014 serial port to a Wi-Fi network.

The ESP8266 and 3.3 V regulator are surface-mount parts that the builder installs. GPIO pads, status LEDs, a small prototyping area, and FTDI programming mode are provided.

Recreates the original 512 KB memory expansion for Franklin Ace 2x00 computers.

Human review confirmed that Board Only, Kit, and Fully Assembled variants could all be ordered on 2026-07-24. The page does not say that Board Only includes components; only the kit and assembled options are stated to include the full 512 KB. The board is fully tested in a Franklin Ace 2200; the broader page claim is Franklin Ace 2x00.

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

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

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

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.

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.

Adds RGB color, programmable sound, paged memory, a Forth extension ROM, and serial I/O to the Jupiter II computer.

A2Heaven marked the expansion kit out of stock on 2026-07-27. The historical package included the expansion PCB, active and passive components, pre-mounted SMD parts, placement and schematic diagrams, documentation, and source material. The base Jupiter II computer was separate and also out of stock.

Recreates the Jupiter Ace as a complete soldering kit with revised video, reset, keyboard, and expansion hardware.

A2Heaven marked the kit out of stock on 2026-07-27. The historical package included the three PCBs, active and passive components, pre-mounted SMD parts, placement and schematic diagrams, documentation, and source material. No separate public fabrication download or current alternative seller was verified.

Connects HD44780 character displays as a readable and writable RC2014 peripheral.

Current kit variants include several screen sizes or the driver alone. Contrast and backlight brightness are adjustable on the module except that the 2x8 display backlight is not adjustable.

Current and buildable replacement ROMs for early compact Macs with a customizable bootable ROM disk and HD20 support.

On 2026-07-24 JCM showed eleven 128K/512K modules and nine Plus modules in stock. Infinity Products also listed standard and spare-ROM kits without an out-of-stock marker. Installation requires opening the Macintosh, removing its ROMs, and soldering three or four address and write lines to the mainboard. BMOW provides the original parts list, Gerbers, assembly instructions, Flash Tool, and ROM data.

Adapts Macintosh two-row DB-15 video to VGA with one switch for universal 640 by 480 or multiscan display modes.

The current product page offered kit and assembled configurations on 2026-07-24. A VGA cable is optional rather than included.

Replaces a failed Commodore PET motherboard with a modern 32 KB board supporting selectable 40- and 80-column modes, several BASIC versions, and original PET interfaces.

Tynemouth Software's active Tindie listing offered revision 1.84B as either a through-hole self-assembly kit or a built and tested board on 2026-07-27. International buyers are instructed to contact the seller for a shipping quote.

Modernizes the Mockingboard A sound card with six voices, a 3.5 mm output, and an input for the Apple II motherboard audio.

Open internal video-overlay module that displays expansion status and other configured messages over C64 composite or S-Video output.

The maker offered assembly kits by email for 25 EUR including regular worldwide mail on 2026-07-30, with a limit of two per person. Stock is kept when practical, but prepaid production batches can take several weeks. The kit includes the PCB, a preprogrammed ATmega, and board components, but not the computer-specific wiring. C64 installation is an advanced internal modification: use amplified luma from A/V pin 1 for S-Video or composite from pin 4, never the unamplified VIC-II luma signal. Driving both outputs requires an expert RF-modulator connection, and excessive overlay brightness can disrupt sync.

Adds flexible ROM sizing and the ability to page ROM out for a full 64K of RAM.

Current options include a standard or ZIF socket and optional blank or programmed PROMs. The base kit excludes a ROM. A ZIF release bar can foul a nearby logic chip unless the chip is lowered, the socket is reversed, or the bar is shortened. 28C EEPROM support is described as untested.

Replaces the RC2014 CompactFlash storage module with microSD for CP/M 2.2.

Current kits are offered for Standard or Enhanced Bus, with the surface-mount microSD socket loose or preinstalled. The Standard Bus version needs the supplied jumper lead to connect /WAIT to the CPU module. The vendor page says RomWBW support is forthcoming, so this record only claims CP/M 2.2 support.

Extends a Macintosh rear DB-25 SCSI port so a DB-25 BlueSCSI can connect with usable clearance.

Both kit and assembled configurations had a live Add to Cart control on 2026-07-24. A BlueSCSI device is not included.

Converts an Apple IIe 80-column card into a 64K auxiliary-memory card.

The current product page listed the complete kit without an out-of-stock marker on 2026-07-24. The included used TMS4464 DRAMs are free, unguaranteed bonus parts and may need replacement.

Recreates the Applied Engineering RamWorks III memory and 80-column card for the Apple IIe.

The store currently lists this 64K self-assembly kit as out of stock. It includes the PCB, parts, and assembly diagram and requires soldering.

Adds 4 MB of auxiliary-slot RAM to an Apple IIe in assembled or through-hole kit form.

The current page offered assembled and kit selectors with an Add to cart path on 2026-07-24. This is a complete 4 MB card, distinct from A2Heaven's 64K RamWorks III clone kit.

Connects 2.5-inch or 3.5-inch IDE storage to a suitably configured RC2014 through an Intel 8255 interface.

The vendor states that a standard RC2014 running BASIC cannot load or save files through this module. Use its documented RomWBW or z88dk software path.

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

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.

Recreates the Apple-1 as a buildable 6502 computer with composite video, modern power, and PS/2, adapted USB, or ASCII keyboard input.

ReActiveMicro exposed assembled and kit selectors plus an Add to cart control on 2026-07-27. Supply a 1 A Micro USB power source, composite display, and compatible keyboard; USB keyboards require an adapter. The kit is intended for builders with intermediate soldering knowledge. Some systems powered by supplies with isolated grounds can suffer recurring slash characters and line feeds; the support wiki documents grounding, firmware, resistor, and capacitor remedies.

Adds an 80-column VGA serial terminal with USB keyboard input, a buzzer, and microSD support to an RC2014.

The optional SD backpack is only for the earlier Pi Pico VGA Terminal. It requires PicoTerm 1.6.0 or later, can be ordered with its surface-mount socket preinstalled, and does not include the Pi Pico itself.

Combines a working Z80 or Z180 computer with RC2014-compatible expansion sockets on one buildable motherboard.

The official pages listed complete-kit and bare-PCB suppliers on 2026-07-27, but no assembled and tested option. Exact inventory varies by model and supplier; the Tindie seller was temporarily on a break when checked. Each board still needs assembly plus the documented power, terminal, and storage accessories.

Adds CompactFlash storage to an RC2014 through a simple 8-bit IDE interface.

The project supplies a schematic, Gerbers, and build documentation, and lists kit and bare-PCB suppliers; an assembled version is not offered. The unbuffered IDE connection must remain short, not every CompactFlash card is compatible, and the maker says older cards tend to work better. Power the CompactFlash adapter directly from SC145 as documented.

Adds four switchable 32K banks of Flash ROM to an RC2014 system.

The project page provides firmware, a schematic, PCB files, Gerbers, and supplier links. CP/M use requires the separate SC150 Paged RAM Module. Leave the Flash write-protect jumper in its normal read-only position unless deliberately programming the ROM.

Builds complete RomWBW and CP/M computers from matched 40-pin or 80-pin RCBus backplanes and modules.

The official pages listed complete-kit and bare-PCB suppliers on 2026-07-27, but no assembled and tested option. Exact inventory varies by model and supplier. A suitable power supply, storage card, USB serial adapter, terminal computer, and assembly tools may be required as specified for each model.

Add supervised 5 V power, manual reset, and power-on reset to an RCBus system.

The projects provide schematics, Gerbers, PCB design files, and kit or bare-PCB suppliers; assembled versions are not offered. SC712 requires a regulated 4.75 V to 5.25 V input. SC703's linear regulator can run hot at higher input voltages and loads. Enable only one voltage supervisor in a system.

Adds a software-driven I2C master interface to RC2014 and RCBus systems.

The project supplies a schematic, Gerbers, PCB design files, and links for kits and bare PCBs; an assembled version is not offered. On PCB v1.0.0, the example I2C read and write address labels are reversed: read starts at 0xA1 and write starts at 0xA0.

Adds a clock-stable 68B50 serial port with TTL-level flow control.

The project provides a schematic, Gerbers, PCB design files, and kit or bare-PCB suppliers; an assembled version is not offered. The serial-header power jumper must not connect two competing 5 V sources. Multiple SC705 modules require distinct I/O addresses.

Provides a modular Z80 processor with flexible clock and reset options.

The project provides a schematic, Gerbers, PCB design files, and kit or bare-PCB suppliers; an assembled version is not offered. PCB v1.0.0 needs a wire link across C7 when X2 is not populated. Enable only one voltage supervisor in a system.

Adds 128K of Flash ROM and 128K of paged RAM for a CP/M-capable Z80 system.

The project provides Small Computer Monitor S8 firmware, a schematic, Gerbers, PCB design files, and kit or bare-PCB suppliers; an assembled version is not offered. Observe the Flash write-protect jumper and avoid function conflicts with other system memory modules.

Combines a Z80, paged RAM and Flash, clock, reset, and serial terminal on one RCBus module.

The project provides firmware, a schematic, Gerbers, PCB design files, and kit or bare-PCB suppliers; an assembled version is not offered. SC708 has no automatic power-on reset, so press its reset button after applying power. Avoid duplicate CPU, memory, clock, reset, or serial functions when adding it to a modular system.

Adds 512K of Flash ROM and 512K of banked RAM for RomWBW and CP/M.

The project supplies RomWBW and Small Computer Monitor firmware, a schematic, Gerbers, PCB design files, and links for kits and bare PCBs; an assembled version is not offered. It is intended for the SC706 Z80 CPU module and is not compatible with the SC730 CPU plus MMU module. JP1 controls Flash write protection.

Adds CompactFlash storage to RC2014 and RCBus systems at I/O ports 0x10 through 0x17.

Both designs have schematics, Gerbers, PCB files, and kit or bare-PCB paths; assembled versions are not offered. Plain CP/M 2.2 can address the first 128MB and RomWBW up to 2GB. The maker recommends avoiding high-capacity, high-speed cards and documents a critical 5 V power issue with some visually identical CompactFlash adapters.

Adds two clock-stable serial ports using a Z80 SIO/2.

The project supplies a schematic, Gerbers, PCB design files, and links for kits and bare PCBs; an assembled version is not offered. The full interrupt daisy chain and optional bus signals require the 80-pin RCBus or additional wiring as documented.

Adds 16 programmable parallel I/O lines and four handshake lines through a Z80 PIO.

The project supplies a schematic, Gerbers, PCB design files, and kit or bare-PCB paths. On PCB v1.0.0, JP2 and JP3 are tight against the P2 box header; the assembly guide recommends filing a little plastic from those headers before soldering.

Adds four programmable counter and timer channels with frequency and interrupt generation.

The project supplies a schematic, Gerbers, PCB design files, and kit or bare-PCB paths. The optional onboard oscillator is not included in the kit. Mode 2 interrupt chaining needs suitable backplane support or flying leads.

Adds eight 5 V TTL inputs and eight 5 V TTL outputs with state LEDs.

The project supplies a schematic, Gerbers, PCB design files, and kit or bare-PCB paths. PCB v1.0.0 leaves insufficient space for C5 to sit tight against the board; this is fixed in PCB v1.0.1.

Adds 512K of RAM and selectable 512K Flash ROM to a 20-bit-address RCBus system.

The project provides Z80 and Z180 firmware, a schematic, Gerbers, PCB design files, and kit or bare-PCB suppliers; an assembled version is not offered. Observe the Flash write-protect jumper and select the ROM/RAM arrangement required by the processor and firmware.

Adds an 18.432 MHz Z180 processor, dual serial ports, and a microSD interface.

The project provides firmware, a schematic, Gerbers, PCB design files, and kit or bare-PCB suppliers; an assembled version is not offered. RomWBW supports the microSD interface, while the documented Small Computer Monitor configuration does not. On PCB v1.0.0 the JP2 RX2 and TX2 labels are swapped; v1.0.1 corrects them.

Combines two Z80 SIO/2 serial ports with four programmable Z80 CTC channels.

The project supplies a schematic, Gerbers, PCB design files, and kit or bare-PCB paths. The optional oscillator is not included in the kit. Standard RomWBW does not enable CTC support, so its documented jumper setup bypasses the CTC and assumes a 7.3728 MHz CPU clock.

Generates three independently selected clock outputs for RCBus processor and peripheral timing.

The project provides a schematic, Gerbers, PCB design files, and kit or bare-PCB suppliers; an assembled version is not offered. Check every destination jumper to avoid driving a bus clock signal from more than one source.

Adds a battery-backed DS1302 real-time clock and several spare I/O bits.

The project supplies a schematic, Gerbers, PCB design files, and kit or bare-PCB paths. The clock is supported by RomWBW but not by plain CP/M 2.2 or Small Computer Monitor. Writes to spare output bits require care because the port is shared with the RTC control bits.

Combines a Z80 processor with a 20-bit MMU for SC721's 1 MB linear memory.

The project provides firmware, a schematic, Gerbers, PCB design files, and kit or bare-PCB suppliers; an assembled version is not offered. Pair it with SC721 linear memory and do not combine it with the bank-switching SC707 or SC714 memory modules.

Adds two independently writable pulse-width modulation outputs.

The project supplies a schematic, Gerbers, PCB design files, and kit or bare-PCB paths. The base address must be even; 0x04 is the documented example. Pulse frequency is the selected clock divided by 128.

Controls two hobby servos through two tightly decoded output ports.

The project supplies a schematic, Gerbers, PCB design files, and kit or bare-PCB paths. Although the servos can use the computer's 5 V rail, the maker strongly recommends an external supply because of loading and electrical-noise concerns.

Adds simple bit-banged microSD storage with RomWBW support.

The project supplies a schematic, Gerbers, PCB design files, and kit or bare-PCB paths. Support is included in RomWBW v3.5; RomWBW v3.4 needs SDENABLE enabled in the RCBus_std configuration. Small Computer Monitor does not support it.

Adds a software-enabled 50 Hz system tick interrupt.

The project supplies a schematic, Gerbers, PCB design files, and kit or bare-PCB paths. Interrupt generation is disabled at reset. A jumper routes the signal to /INT, /INT1, or /INT2 where the chosen bus exposes it.

Adds supervised power-on reset, a debounced reset button, and software-triggered reset.

The project provides a schematic, Gerbers, PCB design files, and kit or bare-PCB suppliers; an assembled version is not offered. Enable only one voltage supervisor in a system and choose an I/O address that does not conflict with another module.

Mounts a BlueSCSI or another 50-pin SCSI device directly above a Macintosh internal SCSI connector.

The current store page listed partly assembled and complete options without an out-of-stock marker on 2026-07-24. The maker repository also provides assembly material and Gerbers.

Adds an onboard emulation of the MOS 6581 or 8580 SID sound chip.

Surface-mount parts arrive assembled, programmed, and tested; the builder completes the through-hole kit. The default is 8580 emulation, changed to 6581 with a solder bridge. Paddle inputs and the SID voice-3 read registers are not emulated, and a decorative DIP28 chip is not included.

Adds two Zilog SIO/2 serial ports for terminals, printers, and other devices.

Current kits are offered for Standard or Enhanced Bus. The Standard version includes a 20-pin header exposing CLK2, TX2, and RX2. Jumpers can allow either FTDI connection to power the RC2014.

MSX cartridge kit for 8 KB through 64 KB DIP28 EPROMs, including a switchable dual-32 KB mode.

The current storefront listed bare-board and kit configurations without an out-of-stock marker on 2026-07-24. Neither the IC socket nor EPROM is included.

DIY 4 MB 30-pin Macintosh memory module made by transplanting DRAM from a compatible 16 MB 72-pin SIMM.

The current store listed the bare kit and optional passive-component set without an out-of-stock marker on 2026-07-24. Compatible donor DRAM is not included.

Expands a low-memory first-generation MSX computer to the MSX1 maximum of 64 KB RAM.

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

Switches an upgraded early Macintosh between 128K and 512K memory configurations.

The product page listed the switcher kit and optional Macintosh 512K adapter without an out-of-stock marker on 2026-07-24. The vendor no longer sends this electronic item by international registered mail.

Switches a Mystic-upgraded Color Classic between its internal floppy drive and an external Floppy Emu.

The current product page listed standard and deluxe kits without an out-of-stock marker on 2026-07-24. Floppy Emu is not included.

Adds a Z80 processor and Microsoft SoftCard III compatibility for running CP/M on the Apple III family.

The current page offered assembled, kit, and PCB-only choices through its product selector on 2026-07-24. The PCB-only option does not include the ROM adapter or programmed ROM, and no option includes a rear-panel bracket. JCM tested assembled units booting Apple III CP/M from both wDrive and an original floppy.

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

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 an all-RAM 64 KB memory map to the SuperPET's 6809 side so it can run the preserved Super OS/9 port.

RETRO Innovations says kits are available through its online store. This is a specialist assembly kit for a two- or three-board SuperPET, not a general PET memory expansion. Use the published construction steps and preserved software package; TPUG and the former OS/9 rights holder do not provide support.

Uses the SX-64's existing drive-reset button to reset the computer, change drive numbers, and switch ROM sets.

All three official variants were in stock on 2026-07-30: the assembled and tested board at USD 19.95, the easy-to-build kit at USD 9.95, and the bare-parts and programmed-CPU TFT version at USD 6.95. The standard assembled board is the simplest option. Installation still requires opening the SX-64 and soldering; the TFT variant is only for the separately documented TFT conversion.

Adds an Apple IIe-compatible mode with 128K RAM and Double Hi-Res graphics to the Apple III family.

JCM showed one fully assembled set in stock on 2026-07-24 and also listed kit and boards-only choices. No option includes rear-panel brackets. The card set requires the documented startup software and installation procedure, and the reproduced III+II board cannot be used by itself because original conversion changes are built into the other boards.

Adds a 5 V TTL serial port and an independently usable 7.3728 MHz clock.

The current product is a through-hole kit, with a bare PCB also listed elsewhere. It normally replaces an existing 68B50 or SIO/2 module; using it alongside another serial port requires backplane modifications.

Adds one Atari and Commodore-style nine-pin joystick port.

The current listing is a kit or bare-PCB design. The RC2014 computer and joystick shown in vendor photos are not included.

Accelerates an Apple IIe with a WDC 65816 processor and a replaceable 13 MHz oscillator.

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

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 eight remote input switches and eight output LEDs for RomWBW or an Orton 3C.

The current kit has different LED, bezel, and resistor options for RomWBW systems and the Orton 3C. The bus-extension socket carries Standard Bus signals and up to four Enhanced Bus signals but is supplied unpopulated.

Emulates a YM2149, AY-3-8910, or AY-3-8912 without requiring an original sound chip.

Current kits select an emulated chip and clock frequency. The module supports the RomWBW PLAYER program and existing BASIC examples, but does not emulate the original chips' GPIO ports. A cosmetic DIP40 cover is optional.

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

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.

Adds three-channel YM2149 or AY-3-8910 sound and stereo line output to an RC2014.

The current Z80 Kits version is sold without a YM or AY sound chip because those parts are no longer manufactured. The builder must obtain a suitable chip. An optional ZXTT module supplies a 1.7734 MHz clock.

Provides a replaceable Z80 processor module with optional advanced bus signals.

The current kit does not include a ZIF socket. On the Standard Bus option, a separate ten-pin header exposes /NMI, /WAIT, /BUSRQ, and /BUSACK.