Parity with Old Genesis core for Unlicensed Games

[ajgowans]

I've smoke checked the unlicensed Mega Drive and Master System games in the HTGDB pack [Genesis - MegaSD Mega EverDrive 2022-05-18.zip] [Master System - Master EverDrive 2022-05-04.zip] and then rechecked against the old core and these are the games that boot on the old core but not the new one:

Mega Drive:

Deer Hunter (R) (Unl).md Harry Potter (R) (Unl).md Iraq War 2003 (Unl).md Pokemon Crazy Drummer (Unl).md

Master System:

8 in 1 - The Best Game Collection (A) (Korea) (Unl).sms | Yes | No | No | Loads to menu and can select game but only get audio with black screen 8 in 1 - The Best Game Collection (B) (Korea) (Unl).sms | Yes | No | No | Loads to menu and can select game but only get audio with black screen 8 in 1 - The Best Game Collection (C) (Korea) (Unl).sms | Yes | No | No | Loads to menu and can select game but only get audio with black screen Bobble Bobble (Korea) (Unl).sms | Yes | No | No | Nuked - black screen but audio Cyborg Z (Korea) (Unl).sms | Yes | No | No | Nuked - black screen Dr. HELLO (Korea) (Unl).sms | Yes | No | No | Nuked - black screen with audio E.I. - Exa Innova (Korea) (Unl).sms | Yes | No | No | Nuked - black screen F-16 Fighting Falcon (Taiwan) (Unl).sms | Yes | No | No | Nuked - black screen with audio when in game Galaxian (Korea) (Unl).sms | Yes | No | No | Nuked - black screen Gangcheol RoboCop (Korea) (Unl).sms | Yes | No | No | Nuked - black screen Gun.Smoke (Korea) (Unl).sms | Yes | No | No | Nuked - black screen Micro Xevious, The (Korea) (Unl).sms | Yes | No | No | Nuked - black screen Mopiranger (Korea) (Unl).sms | Yes | No | No | Nuked - black screen with audio New Boggle Boggle 2 (Korea) (Unl).sms | Yes | No | No | Nuked - black screen with audio Pooyan (Korea) (Unl).sms | Yes | No | No | Nuked - black screen Power Boggle Boggle (Korea) (Unl).sms | Yes | No | No | Nuked - black screen Ppang Gongjang (Korea) (Unl).sms | Yes | No | No | Nuked - black screen with audio Puzzle Game (Korea) (En) (Unl).sms | Yes | No | No | Nuked - black screen with audio Road Fighter (Korea) (Unl).sms | Yes | No | No | Nuked - black screen with audio Sky Fighter (Korea) (Unl).sms | Yes | No | No | Nuked - black screen Sky Jaguar (Korea) (Clover) (Unl).sms | Yes | No | No | Nuked - black screen Sky Jaguar (Korea) (Unl).sms | Yes | No | No | Nuked - black screen Street Master (Korea) (Unl).sms | Yes | No | No | Nuked - black screen Suho Jeonsa (Korea) (Unl).sms | Yes | No | No | Nuked - freeze on Game Start screen Super Bioman I (Korea) (Unl).sms | Yes | No | No | Nuked - black screen Super Boy III (Korea) (Unl).sms | Yes | No | No | Nuked - black screen Super Bubble Bobble (Korea) (Unl).sms | Yes | No | No | Nuked - black screen Super Columns & Tetris (Korea) (Unl).sms | Yes | No | No | Nuked - black screen Three Dragon Story, The (Korea) (Unl).sms | Yes | No | No | Nuked - black screen

There are a lot of games that don't boot on either, but I assume most/all of these are bad dumps or emulator hacks. You can see the list here though on this sheet: https://docs.google.com/spreadsheets/d/1lLPt6ZfYePgnsPkTbAszgHtF1dNiEa0Np9WRtGK5vUE/edit#gid=1492743802

[sorgelig]

Many (unl) games have protection IC which gets checked. There is no much point to make it implemented as every such game have different checks making core too complex, just find patched versions as these protection IC's have no functions besides the protection check.

[ajgowans]

I did the SMS ones as well, a lot there boot to a black screen (but have audio) but you can see the graphics in the Master System core. May be the same issue you mentioned of copy protection?

[sorgelig]

MD never had 100% compatibility with SMS. So some SMS games don't work in MD. It's true for real HW too.

[sorgelig]

btw, Ma Jiang Qing Ren - Ji Ma Jiang Zhi (Taiwan) (Unl).md works fine in MD core.

[birdybro]

I mentioned this in discord (and others did too):

The MSX to SMS hacks also shouldn't work right on a Mega Drive with an SMS converter because the Mega Drive doesn't have support for the Mode 4 video mode.

[sorgelig]

I close this issue. Everything was explained already.