Oric Atmos with ROM cartridge, joystick and Arduino SD device - deep dive! скачать в хорошем качестве

Oric Atmos with ROM cartridge, joystick and Arduino SD device - deep dive!

This video is showing some new hardware and software capabilities I have added to the Oric-1 and Atmos range of computers. First, there is Oricart, a ROM extension device allowing me to pick from several different ROMS. With a total of 512KB capacity, it can host a number of images and this one includes dflat, my custom ROM for the Oric. Second, there is the IJK joystick interface which plugs into the printer port. I have updated the dflat software so that the stick() command uses the joystick rather than keyboard if it is detected on power up. Both of these hardware extensions are not mine, but kindly donated by a fellow Oric enthusiast who might make himself known! Third, and a big project for me, was to add SD card access to dflat. This required adding an Arduino Pro Micro microcontroller which also is plugged into the printer port. The Arduino code I created implements a custom protocol to allow dflat to access files on the SD card. As both joystick and Arduino are hanging off the printer port, they are configured to only respond and take control of the port when properly selected. So they happily co-exist! The SD card loads at just over 2KB per second - a high resolution (8KB) screen is less than 4 seconds to load. Not lightning fast, but much faster than loading a screen from cassette which takes around 50 seconds. All source code for Arduino and dflat are on my GitHub (6502Nerd)