Interis 64

Interis 64 is my homebrew computer project. Like so many before mine, it started ultra-simple on a breadboard and has grown to be a fully functioning system with tons of capability. It serves mostly as a platform for my own learning about computer architecture, hardware design, and low-level programming.

After countless prototypes and three finished PCB revisions, it's getting close to a point where I'd like to open-source the design and source code. As of Spring 2023, it will boot from floppy disks or to an in-ROM system monitor. Long-term, it will be able to run CP/M and an assortment of other disk software written specifically for Interis.

Interis 64 Core Features

• Zilog Z80 processor at 7.4MHz
• 64KB RAM
• 32KB ROM
• Integrated Peripherals:
  • RS-232 Serial Port
  • PS/2 Keyboard Interface
  • Realtime Clock/NVRAM
• Four expansion slots (3 standard and 1 advanced)
• System monitor in ROM

Interis 64 Expansion Cards

• TMS9928A Video Card
• Yamaha OPL-2 Sound Card
• WD37C65C Floppy Controller
• Others in the works...