I think I mentioned it in the other thread. The original Tera was a 286 based board and designed to be programmed in Borland Turbo C. It used some custom PLAs and the sound system was my contribute, 2 YM2203s, but set out in stereo with a speech d/a port. This was the system where I mentioned spending a week up at Doug's house and losing in the pinball bets. If you ever seen the arcade game Qix motherboard set, that was his design. (as a point of trivia, all hardware and software programming for Qix was done in Nocal, it is not a Japanese game whatsoever)
I found my schematics to it so I will post them eventually. One cannot build without the PLA code anyways.
Tera ][ is my own version. It is designed as a more generalized system. I also used the 65C02 because I am much more of a fan of that chip, I use it whenever I can. For example:
http://www.westerndesigncenter.com/wdc/Featured_Developer_1.cfm
I was developing an automated test fixture for a past job that sold DVD and TV entertainment systems for SUVs.
One main project I am working on right now is a pinball. There was the Bally home Fireball pinball series. They used a custom CPU which cannot be gotten today (F8 with embedded program sets). My concept is a piggyback board with a new CPU.
http://www.nightmarepark.com/6502/Pinball Mind/Fireball New CPU002.jpg
Here is my early test configuration. It will revamp into the newer system.
The newer system is designed as a more general axe and tool for things. The specs are as follows:
4 MHz 65C02
32K main program, 24K RAM
4 megs banked ROM 4 megs banked RAM
USB port
Pinout follows the WDC developer module pinout.
TIDE design capability.
So the end result is a fairly low cost general purpose system I can use for a wide variety of tasks. It won't handle high end polygon graphics games without some serious finagling and that is time I don't want to spend For the purposes I want, the pinball, the airplane controller, Tera ][, it is perfect.
There are some past game projects I still hope to bring to life. For example, Thunder Shifter. That was a Romstar redemption game that never saw the light of day. I had a full wiring using our poker boards and a test fixturing made and some code done (which is lost, unfortuantely). I still have my notes about the puppy though and I got some new ideas towards. it. It is a non-video novelty ticket dispensing game.
I do have an arcade I've been working the past 11 years as a test bed so that is where it is scheduled to test at first. It is located at an amusement park in Orange County.