From 457d0c866b5ef333aaa925dbf8d13b1bdf2b2af7 Mon Sep 17 00:00:00 2001
From: Connor McLaughlin <stenzek@gmail.com>
Date: Tue, 5 Jan 2021 02:01:56 +1000
Subject: [PATCH] Created Difficult to Emulate Games (markdown)

---
 Difficult-to-Emulate-Games.md | 94 +++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 Difficult-to-Emulate-Games.md

diff --git a/Difficult-to-Emulate-Games.md b/Difficult-to-Emulate-Games.md
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+Monkey Hero
+ - DMA transfer timing or FMVs lock up
+ - Commands spanning multiple blocks
+
+Hot Wheels Turbo Racing
+ - DMA timing or hangs on startup/ingame
+
+Syphon Filter (series)
+ - Infinite DMA linked list/chains
+
+Valkyrie Profile
+ - Requires DMA timing otherwise battles time out/lock up
+
+Red Asphalt
+Dukes of Hazzard, The - Racing for Home 
+Little Princess - Marl Oukoku no Ningyou-hime 2
+ - Hangs in various locations if DMA timing is off
+ - Locks up if DMA timing is off/CPU does not run
+
+Suikoden (version 1.0, not 1.1)
+ - Two releases, the old version corrupts palettes if you don't emulate fetch timing from the BIOS ROM
+ - It executes a bunch of memmoves (running from uncached ROM), which can't complete too quickly, racing the DMA
+ - Interestingly, version 1.1 spams printf during the same screen transition with a bunch of a's and a number suffix
+
+Deadheat Road
+ - Kicks off a DMA chain involving a VRAM fill, which takes a while to complete,
+ - then does a memcpy out of uncached ROM
+ - then zeroes out some of the headers in the DMA chain before it finishes
+ - Will hang emulators (if they don't properly handle infinite LLs) or the game will time out and skip a bunch of texture uploads in the loading scren
+
+Alice in Cyberland
+ - HUD/UI will flicker during battles if draw and DMA timing is instant
+
+Battle Arena Toshinden
+ - Runs too fast if CPU/GPU timing is off
+
+Bust A Groove Series
+ - Audio will drift slowly over time with game if GPU frame rate is incorrect
+
+Championship Motocross 2001 featuring Ricky Carmichael
+ - Sensitive to DMA timing - rider will be missing from bike if incorrect
+
+Evil Dead - Hail to the King (USA)
+ - Needs timer0 clocked from dot clock emulated
+
+NASCAR 2001
+ - Main menu music will drop in and out if SPU interrupts are not re-triggered after enabling
+
+Skullmonkeys
+ - Requires GPU coordinate truncation/sign-extension otherwise objects will be missing
+
+Formula One 99
+ - Requires CPU icache emulation
+
+Spyro 2 PAL
+Spyro 3 PAL
+ - Libcrypt protection is really nasty - the cop0 instructions to grab are xor-obfuscated, and written immediately before execution
+ - Naive icache implementations will break - you need to handle partial line fetches from non-16-byte-aligned addresses
+
+Parasite Eve 2
+Disney's Treasure Planet
+ - Sensitive to MDEC timing
+
+Pro Pinball Series, True Pinball
+ - Requires interlaced rendering (line skipping) otherwise hangs on startup
+
+Dead or Alive
+ - Requires interlaced rendering, otherwise artifacts on screen in battles
+
+Vampire Hunter D
+ - Screws with GPU packets after enabling DMA, requires CPU to run in parallel otherwise menu will be black
+
+Jackie Chan Stuntmaster
+ - Triggers interrupts by setting cop0 bits in software, can be tricky for recompilers
+
+Silent Hill
+Ghost In The Shell
+TwinBee RPG
+Duke Nukem - Land of the Babes
+Ultraman - Fighting Evolution
+ - Various graphical errors if mask bit is not emulated correctly
+
+Megatudo 2096
+NBA Jam Extreme
+Zero Divide
+ - Requires semi-accurate CPU timings (icache/fetch) and GPU draw timings, otherwise games run too fast
+
+Moto Racer
+Frogger
+Pandemonium!
+Adidas Power Soccer 98
+Armored Core
+Auto Destruct
+ - Sensitive to DMA timing (and CPU/DMA slices), otherwise controller input is dropped
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