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No idea if it works on single boards (and frankly I don't want to try, I'm not in a position to fix it if I break its flash). The dance nem described should work.

Proud to release "SPI REVIVE", a patch for adding a region select menu to Seibu SPI games. This allows you to change the region on your SPI motherboard. This fixes those dreadful "CHECKSUM ERROR" and "HARDWARE ERROR" messages, most notably. There's a bunch of neat stuff I found while working on...

If you're undercutting him with it, it would be my honor for you to do whatever you're doing :P Greatly appreciate you wanting to get permission, you have my blessing :)

The following information (and the ROM) are available at my website: http://daifukkat.su/hacks/grdforcel/ There is also a donation link, but don't feel obligated! Success's hidden gem Guardian Force is a truly amazing game, but has one very unfortunate flaw: the program is extremely poorly...

Was working on redoing the way I handle the sprite RAM differences, and I went down a rabbit hole and discovered a debug mode in Cadillacs and Dinosaurs lol. Wrote up a few findings here: https://tcrf.net/Cadillacs_and_Dinosaurs Thanks folks for posting about testing, I'll pick some people soon...

Been working through Muscle Bomber some more, I think I'm going to give up on it for now. The protection is insanely aggressive, and I really don't want to spend more time unraveling its mess for now. Punisher will probably be the first to finish then, since it uses the priority effect less than...

Went back to hacking up Tenchi wo Kurau 2 since I haven't touched it since all my big reworks. Bopped the last of the anti-hacking code (there's very little of it), so it seems to work just fine now. Still has those per-color priority issues, but there isn't much of it in this game aside from...

Layer priority issues were bugging me a bit, so I investigated. Realized that CPS2 requires setting a second register in order to correctly setup layer mixing with sprites, so if a game ever used a layer priority order other than 1>0>2>3, sprites would be the wrong priority. Solved with a lookup...

Set up Cadillacs at a friend's and played it a bit with some 2P and 1P, it crashed a few more times with clearly anti-piracy failures. Guess I need to do some more full sweeps in MAME, clearly didn't do a good enough job with that. Also set up some configuration options with the build to allow...

Went back to Cadillacs a bit more, bopped some anti-hack checks, fixed some input mapping. Played through to the end on my multi and everything seemed normal and working great. I need to flip around some sprite buffers next, as there's some strange sprite flicker/delay on occasion that is a bit...

Since Muscle Bomber isn't being super cooperative I decided to fuck around and got 3P inputs working in Cadillacs (should work on any of the 3P and 4P games, but I've not tested those yet). Muscle Bomber I think will be the first one that I can finish, since it doesn't seem to use the per-color...

I'm probably just misremembering things, I suppose region is probably on the motherboard. It's been a long time since I've had my MS32 out or looked at it, so I forget specifics.

I'd leave a project like this to darksoft, I'm quite sure he could do it. :) I'm pretty maxed out on projects anyways, the CPS1.5 stuff will likely take a while anyways.

I seem to recall my Desert War does not have any sub-board, though it is Wangan Sensou (JP version). Gratia is pretty straightforward. Conversion (or a multi) should be extremely easy, just decrypt the graphics of the target, then re-encrypt with the donor cart. I believe the only encryption is...

Been playing a bit of the Cadillacs port, it's definitely triggering protection stuff in a lot of places (leading to good effects such as "kick me back to the title screen", "black screen forever", and obviously crashes). Got good ideas on how to track those down. When I did Tenchi o Kurau 2 I...

Cooked up Tenchi o Kurau 2 in a few hours, the game's code is pretty sloppy and "everywhere" with its priority stuff, so it's definitely buggier than Cadillacs. I'll have to polish this one up later too. Amusingly, my sound decryption program would have worked 100% out of the box if I'd just let...

Regarding audio, it's all perfect. I wrote a slick tool that automagically decrypts the entire sound program, so I'm quite confident that it's perfect. The priority issue is probably going to be the biggest pain, I'm a little afraid that it'll be a lot more work than I anticipated, but we'll...