Updated Difficult to Emulate Games (markdown)

Difficult-to-Emulate-Games.md

@@ -6,16 +6,19 @@
 
 ### Hot Wheels Turbo Racing
  - DMA timing or hangs on startup/ingame
+ - Infinite DMA linked list/chains
 
 ***
 
 ### Syphon Filter (series)
+### Tekken 2
  - Infinite DMA linked list/chains
 
 ***
 
 ### Valkyrie Profile
  - Requires DMA timing otherwise battles time out/lock up
+ - Loop address from ADPCM blocks must be ignored with the register value taking precedence
 
 ***
 
@@ -72,6 +75,11 @@
 
 ***
 
+## Casper
+ - Puts SPU IRQs in addresses being read by released/off voices
+
+***
+
 ### Skullmonkeys
  - Requires GPU coordinate truncation/sign-extension otherwise objects will be missing
 
@@ -82,6 +90,11 @@
 
 ***
 
+## Formula 1
+ - Spams invalid MDEC commands, need to be ignored/parameters skipped
+
+***
+
 ### Spyro 2 PAL
 ### Spyro 3 PAL
  - Libcrypt protection is really nasty - the cop0 instructions to grab are xor-obfuscated, and written immediately before execution
@@ -89,6 +102,18 @@
 
 ***
 
+### Final Fantasy VIII
+ - Uses an undocumented method for swapping the dualshock motors, intensity will be zero if not emulated correctly
+ - Has some scenes which rely on coordinate truncation/sign extension per-scanline
+
+***
+
+### Final Fantasy IX
+ - Seems to use VRAM as a swap area during transitions
+ - VRAM writes and readbacks must be bit-accurate, otherwise at best you get broken animations, at worst crashes
+
+***
+
 ### Parasite Eve 2
 ### Disney's Treasure Planet
  - Sensitive to MDEC timing
@@ -111,6 +136,32 @@
 
 ***
 
+### Victory Spike
+### Magical Drop III - Yokubari Tokudai-gou!
+### Yuukyuu no Eden - The Eternal Eden
+### World Cup Golf - Professional Edition
+ - Expects other DMA channels to run while an infinite linked list chain is running
+
+### 
+
+***
+
+### Team Buddies
+### The Next Tetris
+ - Sensitive to ODE bit (31) in GPU status register
+
+***
+
+### Wizard's Hamony
+ - Does logical seeks to data sectors, this needs to succeed, but reads of audio sectors should fail for other games
+
+***
+
+### Nickelodeon Rugrats - Search for Reptar
+ - XA audio in intro has more data than can be played by the SPU, buffers need to be correctly cleared on overflow
+
+***
+
 ### Jackie Chan Stuntmaster
  - Triggers interrupts by setting cop0 bits in software, can be tricky for recompilers
 
@@ -132,6 +183,49 @@
 
 ***
 
+### Zoku Mikagura Shoujo Tanteidan - Kanketsuhen
+ - Uses timer gated by hblank but sysclk as clock source, essentially counting ticks outside of hblank
+ - Will hang at startup if not emulated correctly
+
+***
+
+### WipEout
+ - Repeatedly seek commands while seek is in progress, position needs to be updated when the next request comes in
+
+***
+
+### Chicken Run
+ - Requires deferring setting the reading/playing bit in the CD-ROM until the first sector is read
+
+***
+
+### Arc the Lad III
+ - Requires error interrupt on shell open for disc change detection
+
+***
+
+### Voice Idol Collection - Pool Bar Story
+ - Music in transitions will slow down due to timeouts in the CD-ROM code when commands are cancelled
+ - I use a heuristic of "cancel only when the new command has fewer parameters than the old command, otherwise clear FIFO and send error"
+
+***
+
+### Dancing Stage featuring DREAMS COME TRUE
+ - Supplementary disc detection will fail if pregaps are incorrect, or errors are not sent on ReadN
+
+***
+
+### Bedlem
+### Rise 2
+ - Sensitive to sector buffering/overwrite behavior when missing CD-ROM reads
+
+***
+
+### Gameshark Sampler Disc
+ - Requires one cycle delay from CD-ROM interrupts
+
+***
+
 ### Silent Hill
 ### Ghost In The Shell
 ### TwinBee RPG