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Messages - bsittler

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The second monitor program runs on a Master System derivative. Any idea whether it's possible to read that using the Retrode2 without an adapter?

FYI: Retrode2 was able to read the game ROM from Sega Mega-Tech Tetris. The game ROM contents are bit-for-bit identical to those of the barely-released (recalled?) Japanese Mega Drive Tetris cartridge.

Sega Mega-Tech cartridges appear physically identical to Japanese Mega Drive cartridges but with a partly different pinout (they apparently have a second ROM for the second screen and side B of the cartridge is wired differently from Mega Drive) and much less exciting labels, and are intended for use inside a Mega Drive-like arcade machine with extra hardware for coin mechanisms, instructions display, etc.

Somehow Retrode2 can read the game ROM though, so this allows use of the original cartridge's game data in an emulator-based modern system.

Thanks yet again for the awesome hardware and firmware!

P.S. Maybe someone knows a way to dump the extra ROM for the second screen? The pinout is at least mostly known

General Discussion / Re: SEGA SMS/GG Firmware (FW v0.24)
« on: 14/Aug/2018 02:33:45 PM »
FYI, Peter byemu (famulator)'s "Lithium"/"Tengu" MD dumper seems to be electrically compatible with skaman's Retrode2 Mark III plugin. Using that combination, I was able to dump five problematic SG-1000 cartridges (Orguss, Star Jacker, Girl's Garden, Flicky, and Congo Bongo.) I'm not yet sure why the Retrode2 only sees 0xFF for these, but at least there does exist a Mass Storage-compatible dumper that can read them. Note that the dumps will need to be deinterleaved (discard all even byte locations, they all read as 0xFF) and truncated (these old games are headerless, they all seem to work with final length 32768 bytes.)

General Discussion / Re: SEGA SMS/GG Firmware (FW v0.24)
« on: 19/Jun/2018 06:31:29 AM »
This is great! I updated to this firmware and built a "Mark Master Converter". With those I'm able to dump+emulate many SG-1000 and Mark III games — both cartridges and My Cards — by stacking the Mark Master Converter atop the PlugIn Master. However, my adapter may have some sort of bug - there are a few SG-1000 cartridges I have not been able to use with the Retrode2, and they load as entirely 0xFF bytes:

  • Congo Bongo
  • Flicky
  • Girl's Garden
  • Star Jacker

Strangely, those very same games work fine (other than missing SG-1000 color palette set-up and needing a quick cartridge-swap to defeat the BIOS checks) in a Game Gear by stacking the same Mark Master Converter on top of the Beeshu Gear Master. Also, more than a dozen other games — including SG-1000 and Mark III cartridges and also My Cards — work fine with the Mark Master Converter atop the PlugIn Master in the Retrode2.

Before I go too much further into debugging these, has anyone else been able to successfully use any of these SG-1000 titles via the Retrode2?

edit: got one of skaman's Mark III Plug-Ins (thank you!) and see the same behavior with that as with the two-adapter stack - however, it's a beautiful Plug-In, works fine with actual Mark III cartridges, and I highly recommend it :)

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