Tag: io ports

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 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 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 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 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 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.

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

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

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.

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.

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 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 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.

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 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.