Zilog Z8000 retro computer part 3: Video and Keyboard using TMS9918 or Yamaha V9958

Описание: I think video I take my Z8000 clover computer that was developed in parts 1 and 2, and I add the necessary parts to enable video and keyboard. I demonstrate both a 40-column circuit using TMS9918 and an 80-column circuit using V9958. The 40-column circuit was based on J.B. Langston's RC2014 video board, and the 80-colum circuit is based on designs by Sergey Kiselev and by Dean Netherton. For a keyboard, I used Sergey's MSX keyboard. A Zilog Z8563 CIO is used to do the strobing of the keyboard, implementing both the timer necessary to interrupt periodically for the keyboard strobe, and to implement the IO to the keyboard itself. With this project, the Z8000 Modular computer is now a complete standalone computer system. If you're unfamiliar with the Z8000, it was a 16-bit microprocessor, rarely used in a very few vintage computers, but still available from sources on eBay. For more electronics projects, please see http://www.smbaker.com/