This is a bit of a quickie project in between bigger things.
Last year David Viens dumped the ROM in the Unisonic Champion and its cartridges:
And subsequently it has made its way into MESS as the "unichamp" driver.
Armed with the system ROM image, and GI datasheets I thought it should be possible to get the Intellivision to mimic its little brother. How hard could it be?
The result is "Li'l Bro", a Unisonic Champion simulator for the Intellivision. It can be played on JzIntv or other emulator using this ROM image:
lilBro.rom 6.56KB 62 downloads
I should warn you that the Unisonic is utterly underwhelming and is a serious contender for the title "Worst Console Ever", as described by Paul Robson:
Li'l Bro only plays the card games Blackjack and Bacarat that were built into the console at the moment. This is because it was the only ROM I could find; it is mind bendingly boring to convert the games, and the end result, while technically interesting, is no fun to play.
To play the ROM each player has only 2 controls. "Yes" is mapped to controller keypad buttons 1, 2 or 3 on the each controller and "No" to buttons 7, 8 and 9. If you are playing on Jzintv with a qwerty keyboard I recommend the following keyboard hack file, this saves having to switch backward and forward between keyboard maps. This maps:
- Left controller "yes" -> q, w or e
- Left controller "no" -> z, x or c
- Right controller "yes" -> y, u, i or o
- Right controller "no" -> b, n, m or comma
kbd.txt 164bytes 58 downloads
Unlike my previous project, Li'l Bro is not an emulator. Although the majority of the code being run is the same as that in the Unisonic Champion, it has been tweaked to take account of the different architecture and memory map in the Intellivision. So, technically Li'l Bro is a simulation, rather than an emulation. That said, I think it is pretty faithful to the original. You can see a video of a real Unisonic being played here:
As always, all feedback, good, bad and indifferent is most welcome.
Enjoy! (you probably won't, but at least the sentiment is there).
Edited by decle, Sun Jun 5, 2016 8:04 AM.