Long time lurker, but I'm finally getting ready to start on my pet project. I'm in the planning stage of designing and building my very own homebrew computer. The projected spec are the following:
[*]CPU: Motorola 68000
[*]RAM: 4 Meg
[*]I/O: Serial, PS/2 connector for key and mouse
[*]Video: Arduino based VGA video interface. Here is an example of one:https://dqydj.com/how-to-produce-640x480-vga-color-video-from-an-arduino/
[*]Audio: 4 voice PCM (Paula chip from a dead Amiga 500) and/or a C64 SID chip (Why not!)
[*](3x) Expansion slot for more ram (up to 12 meg more), Compact flash "Hard Disk", Game Controler, extra I/O
For the OS I'm going for a "simple" Assembler/Monitor type shell at first. Something I can boot into, load or type in program and run them. It will be loaded from eeprom. This should be enough for a start. I'm using both an Amiga 1000 and Cloanto Amiga Forever emulator on PC as a development plateform (Asm-One and Aztec C) and I have an eeprom programmer to "burn" the chip.
This isn't something I'm in a hurry to do. I'm at the end of my carreer in IT and this will be one of my hobby for the next couple (many) year. I always wanted to build my own computer, like the pioneer in this field of technology. I even started to work on one, based on TTL chip, when I was in my teens. Now that I have the time, and the money, I can get back to it.
Don't expect a day to day log from me, but I'll post how it goes when I can.