PC Output Interface
The PC parallel port can be easily damaged by wiring mistakes, short circuits or the circuits you connect to it. If the parallel port is integrated into the mot...
Z80-Family Official Page
The purpose of this page and its sub pages about members of Z80 family (and close relatives) is to collect and share information and good ideas. I know there ar...
USB I2C Interface
This kit is based upon an original design by Jan G0BBL and provides a multi-faceted replacement for the older "Rocky" serial interface kit. The kit includes: Th...
Secure USB Time-Stamp for Data-Logging
This project implements a USB device which provides a real-time clock for the purpose of time-stamping events in an non-networked embedded computer environment....
PC Case USB LCD
For the first version of my Open Source Framework for USB Generic HID devices based on the PIC18F and Windows I made a quick example of how to use the library u...
C64 VICE Front-End
The aim of this project was to create a front-end for Commodore 64 emulation using VICE. One of the primary problems with emulators (especially for machines fro...
Atari Joystick USB Adaptor
This project implements a composite USB device supporting two USB 2. 0 full-speed gameport HID interfaces. The physical joystick ports are wired in accordance t...
Spectrum Keyboard Buffer
Most people who want to modify and improve their Spectrum look first at the keyboard as a prime area for change. But straightforward replacement involves diggin...
THE ZX97LITE SCHEMATIC
I designed the ZX97 as a discrete copy of the ZX81, which was the first PC for millions of people. In the process ZX97 turned into much more than a mere copy. W...
USB SCHEMATICS
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TV-Terminal serial TV/VGA/KBD-Controllers
Your TVT-MOBI-2 will only display this static image and will not yet react to any data received by its serial interface. With one exception. You can set the int...
USB 8bit Interface Board
The goal was to make a small USB interface board which could easily be connected to microcontroller boards. It should support USB-powered as well as externally-...
USB-FX2 Interface Board (USB-2.0)
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USB-Atmel External 3.3V Level Converter
In order to programm devices which run at 3. 3V (either SPI-based ones like AVRs or JTAG-based ones like CPLDs), the input and output signal levels need appropr...
USB-Atmel Interface Cable Circuit
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TDS9092 TDS971 IEEE-488/RS232C
This is a Eurocard communications board for TDS2020F or TDS9092 computers (or earlier types). It contains an IEEE-488 Talker/Listener interface and two RS232 po...
Data logging to Compact Flash and PCMCIA TDS2020F
This section covers Compact Flash, Flash-ATA and hard disks. For other media see DATA LOGGING TO RAM CARDS, page274, and DATA LOGGING TO FLASH AND RAM CHIPS, pa...
sinclair zx microdrive
Archaeologic They would, Clive Sinclair claimed on 23 April 1982, revolutionise home computer storage. Significantly cheaper than the established 5. 25-inch and...
oric 1
Inside the machine, the Oric-1`s ULA chip slotted into a tidy, well organised motherboard. components are neatly arrayed in groups and there are no last minute...
bbc micro model b
Before the Atom had even been launched, executives at the BBC`s education programming department, enthused by rival broadcaster ITV`s 1979 series The Mighty Mic...