Commit Graph

8 Commits

Author SHA1 Message Date
nmlgc cd33367b51 [C decompilation] [th02/op] Music Room
Yes, all of it. Including the bouncing polygons, of course. And since it's
placed at the end of ZUN's code inside the executable, the code's already
position-independent and fully hackable.
2015-02-24 22:38:44 +01:00
nmlgc ad9d6f97eb [Reverse-engineering] [th02] MIKOConfig structure 2015-02-23 23:48:03 +01:00
nmlgc 46eb3792cf Move frame_delay into the hardware/ subdirectory 2015-02-23 10:29:12 +01:00
nmlgc f0be7dadf4 [Reverse-engineering] [th02] Keyboard input
Don't really understand the other games yet because they start introducing
joystick support and TH03 has multiplayer and then there are these master.lib
modifications that don't really make any sense to me, especially when you add
that TH04 seemingly does not read js_stat *at all*, yet still works just fine
with a gamepad and... urgh.
2015-02-22 22:33:07 +01:00
nmlgc 6d8ff6b72e Make previously reduced ZUN functions available to C 2015-02-21 14:12:22 +01:00
nmlgc bead27b781 Use TASM calling convention syntax for previously identified ZUN functions
With TH03 changing the calling convention for most of the code from __cdecl to
__pascal, I've been getting more and more confused about this myself. So,
let's settle on the following consistent syntax for function calls:

* C where the calling convention is actually __cdecl and where TASM's emitted
  __cdecl code matches the original binary
* PASCAL where the calling convention is actually __pascal
* STDCALL where the calling convention is actually __cdecl, but where
  the caller either defers stack cleanup (summing up the stack size of
  multiple functions, then cleaning it all in a single "add sp" instruction)
  or where the stack is cleared in a different way (e.g. "pop cx").

Unfortunately though, when using the ARG directive to automatically generate
an appropriate RET instruction for the given calling convention, TASM always
emits ENTER and LEAVE instructions even when no local variables are declared,
which greatly limits the number of functions where we can use that syntax. -.-
2014-12-16 05:53:56 +01:00
nmlgc f40819b0e5 [Reverse-engineering] frame_delay 2014-11-23 22:32:26 +01:00
nmlgc f303222ffc Replace MASTERMOD with a per-game constant
Yup, packfiles finally proved that we really have a different set of changes
to master.lib in every game. Also, there are bound to be more of these game-
specific small changes to otherwise identical code in ZUN's own code.

And hey, no need to define that value in the build scripts anymore.

(I've also considered just copying modified versions into the individual game
subdirectories, but it's not too nice to expect people to diff them in order
to actually understand why these copies exist and where the changes actually
are.)
2014-11-15 02:03:41 +01:00