Tag: rc2014

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 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.

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.

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.

Adds a two-drive floppy controller and DS1302 real-time clock to RC2014 and RCBus systems.

Tindie listed the complete Flock V2 kit without an out-of-stock notice on 2026-07-25, and open build files remain available. The CR2032 battery and optional 300 Kbit/s parts are not included. The drive-power output is unfused; avoid overloading or shorting it.

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.

Drives an optional 64-pixel RGB matrix or an external addressable-LED chain.

Both assembled and tested layouts are currently listed. The full-size version offers an optional 8x8 matrix and filter; the Short Board includes eight diffused pixels and headers for up to two matrices. Up to 128 pixels are documented, and third-party displays can differ in pinout and RGB byte order.

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.

Adds a high-contrast 128x32-pixel green OLED display.

The vendor page currently marks the assembled and tested module out of stock.

Connects an original or modern replacement SID module to an RC2014.

No SID is included in the base module, although the current listing offers a SwinSID option and a separate 8580 adapter. The main socket directly supports a 6581, SwinSID variants, and ARMSID; an 8580 requires the adapter.

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.

Combines 128K of Flash ROM and 128K of paged RAM for RC2014 systems, including CP/M configurations.

The project page provides firmware, a schematic, PCB files, Gerbers, and supplier links. A later SC707 design also exists, but SC152 remains documented and buildable. Keep the Flash write-protect jumper in its normal read-only position except when programming it.

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.

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.

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.

Combines a Z80 CPU, 512 KiB Flash, 512 KiB SRAM, clock, reset, and RomWBW paging on one modular card.

Tindie listed the complete Z80-512K kit without an out-of-stock notice on 2026-07-25; complete open files also remain available for both designs. The Z80-CPM store page failed extraction, so no stock claim is made for that variant. Z80-512K builders using its supervisor without a backup battery must short the battery connector as documented.

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.

Business-card-sized RC2014-compatible Z80 computer with 1 MiB of memory and integrated serial and parallel I/O.

This is a surface-mount self-assembly project with KiCad, Gerber, CPLD, and firmware documentation. Programming its MAX7000AE CPLD requires the older Quartus II 13.0sp1 toolchain because newer Quartus versions do not support the device.

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.

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.

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.