32MB RAM upgrade

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tsowell
rebel
Posts: 19

Re: 32MB RAM upgrade

Post#31 » Fri Jun 26, 2020 1:05 am

ChristinaDreamcustDC wrote:tsowell, can you give examples of a couple games that start and play fine, at least for a little bit? Have there been any noticeable changes in other games, including crashing, glitches, etc?


I'm not in a great position to do this because I've already made some other modifications to my 32MB Dreamcast. I need to put together a fresh 32MB motherboard before I can do anything scientific. I've mostly been using my 32MB Dreamcast with my ScummVM backend which runs fine and takes advantage of the upper 16MB of RAM.

But I grabbed a stack from my collection and tried each one out for 2-3 minutes. Here are the results (all NTSC-U unless otherwise noted):

No problems:
Shenmue
Virtua Tennis
Sturmwind
Dead or Alive 2 (NTSC-J)
Soul Calibur
Jet Grind Radio
Seaman
The Typing of the Dead

Problems:
Space Channel 5: plays fine, but instead of FMV background, just a black plane
Tony Hawk's Pro Skater: displays trademark screen (Tony Hawk's, not the SEGA one) and hangs there
NFL 2K1: blank screen, doesn't run

I wonder if there's some common FMV code that isn't working.

No theories, but an observation: one thing that we know will crash a 32MB Dreamcast, but not a 16MB Dreamcast, is setting the MCR's AMX bits to 4.

zgoro
noob
Posts: 4

Re: 32MB RAM upgrade

Post#32 » Wed Jul 08, 2020 12:11 pm

Which other parts would need to be upgraded in order to turn it into a NAOMI board?

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