Interis 64 System ROM

Interis 64 Z80 Computer https://github.com/Interis64

Copyright 2023 Matthew Martin

Licensed under the GNU GPL 3.0. See the LICENSE file for details.

Development Notes

Building

Building the ROM requires z80asm and GNU Make. Simply execute make and the ROM image will be assembled to dist/InterisROM.bin. Execute make clean to remove any build output and start from scratch. If you have a TL866 programmer and minipro installed, you can execute make burn to write a 28C256 EEPROM.

Code Organization

The main.z80 file contains the basic layout of the ROM image, initial startup code, and reset vectors.

The System directory contains the bulk of the Interis 64 System code, including the system monitor and drivers for on-board hardware. System.z80 is framework, BaseSystem.z80 is code.

There are also directories for the various supported expansion cards:

• VDP for the TMS9918A Video Card
• OPL for the Yamaha OPL2 Sound Card
• FDC for the Floppy Disk Controller Card

Thanks and Acknowledgments

Grant Searle, whose impressive work inspired and helped kick-start this project: http://searle.wales/