diff options
| author | Léo Lam <leo@innovatetechnologi.es> | 2019-05-01 12:08:58 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-05-01 12:08:58 +0200 |
| commit | d9999f406bb42ab3b46b393bdb2e9a088020e5bb (patch) | |
| tree | 16a58bb6fe202c91d1e57b9c41ebda54d8de423d /Data/Sys | |
| parent | 37c85b32c058e820d0bc81aca8d380e09aef1bd5 (diff) | |
| parent | 0ac642a537d9d1173252de7ed8db116063ec6e1a (diff) | |
Merge pull request #8059 from JosJuice/casper-dcache-hack-pal
Port Casper's Scare School: Spooky Sports Day dcache hack to PAL
Diffstat (limited to 'Data/Sys')
| -rw-r--r-- | Data/Sys/GameSettings/RX4E4Z.ini | 4 | ||||
| -rw-r--r-- | Data/Sys/GameSettings/RX4PMT.ini | 26 |
2 files changed, 28 insertions, 2 deletions
diff --git a/Data/Sys/GameSettings/RX4E4Z.ini b/Data/Sys/GameSettings/RX4E4Z.ini index 007e8d255b..6a6e25ca91 100644 --- a/Data/Sys/GameSettings/RX4E4Z.ini +++ b/Data/Sys/GameSettings/RX4E4Z.ini @@ -1,4 +1,4 @@ -# Casper's Scare School: Spooky Sports Day (RX4E4Z) +# RX4E4Z - Casper's Scare School: Spooky Sports Day [OnFrame] # Work around a dcache issue by preventing the game from doing something pointless. @@ -17,7 +17,7 @@ # .text:800D2E6C mr r5, read_length # length # .text:800D2E70 mr r6, read_offset # offset # .text:800D2E74 addi r3, this, file.file_info # file_info -# .text:800D2E78 addi r4, r4, dvd_read_buf@l # addr +# .text:800D2E78 subi r4, r4, dvd_read_buf@l # addr # .text:800D2E7C addi r7, r7, game_dvd_read_callback@l # callback # .text:800D2E80 li r8, 2 # unknown # .text:800D2E84 bl DVDReadAsync diff --git a/Data/Sys/GameSettings/RX4PMT.ini b/Data/Sys/GameSettings/RX4PMT.ini new file mode 100644 index 0000000000..c8ad7c3ff4 --- /dev/null +++ b/Data/Sys/GameSettings/RX4PMT.ini @@ -0,0 +1,26 @@ +# RX4PMT - Casper's Scare School: Spooky Sports Day + +[OnFrame] +# Work around a dcache issue by preventing the game from doing something pointless. +# +# The game's DVD read function writes 0x87654321 to the entire read buffer and 0x12345678 to the +# last 4 bytes. It then calls DVDReadAsync() and without waiting for the read to complete at all, +# it checks if the last 4 bytes are still 0x12345678. If they are, then the game fails. +# +# The check always passes on console because DVDReadAsync() -> issueCommand() calls +# DCInvalidateRange() (dcbi) on the read buffer. +# +# Dolphin cannot emulate this without an extremely significant performance hit. +# +# .text:80164B8C lis r7, game_dvd_read_callback@ha +# .text:80164B90 stw r0, 0(r17) # write 0x12345678 to the end of the buffer +# .text:80164B94 mr r5, read_length # length +# .text:80164B98 mr r6, read_offset # offset +# .text:80164B9C addi r3, this, file.file_info # file_info +# .text:80164BA0 subi r4, r4, dvd_read_buf@l # addr +# .text:80164BA4 addi r7, r7, game_dvd_read_callback@l # callback +# .text:80164BA8 li r8, 2 # unknown +# .text:80164BAC bl DVDReadAsync +# +$Fix file reads (dcache bypass) +0x80164b90:dword:0x60000000 |