Descargar Nintendo World Cup: Pause Fix ROM Hack

+-------------------------------+
| Nintendo World Cup: Pause Fix |
+-------------------------------+

Author: Dacicus
Version: 1.00


-= CONTENTS =-
In addition to this Readme.txt file, you should have received a file called 
NWCPause.ips with the following properties:

Size: 35 bytes
MD5: 0f5d7792ccb67bc1415d5ae7bd567d8f
SHA1: 4cbb02471a21f59917ec75b2abd2db44c673ef03


-= DESCRIPTION =-
This hack allows any of the NES controllers to pause the game during a match.
Originally, only controllers 1 and 3 (for those with a Four Score or Satellite)
could pause. The idea for this hack arose from the inability of player 2 to
pause during online play. It is compatible with my All-Team Versus Version
hack, but the fix works in both Tournament Mode and VS Match Mode. The
assembly code changes are explained below.


-= PATCHING =-
This hack is in IPS format. The patch should be applied to the U.S. version of
the Nintendo World Cup ROM:

GoodNES 3.14: Nintendo World Cup (U) [!].nes
Size: 262,160 bytes
MD5: fc0cd7c1b00d73d18e1f8af142c98fb8
SHA1: 75a2abb0d34be656ee98a9417f85a90ea4a2cbf8

Patching Example:
- Get Lunar IPS from http://www.romhacking.net/utils/240/ and extract it to a
  directory of your choice
- Start the Lunar IPS program
- Click "Apply IPS Patch"
- Navigate to the NWCPause.ips file and open it
- Navigate to a copy of the Nintendo World Cup ROM and open it
- You should get a message box saying that the file was successfully patched

After patching, the file should have the following properties:

Size: 262,160 bytes
MD5: 5587c4cc7d5c55447f4c0ed0b0b4a9ea
SHA1: f4670e58f4f239066c651e855f7f0b69bdd1e7d6


-= ASSEMBLY =-
The status of controllers 1-4 is stored in RAM at $00DA-$00DD, respectively,
with bit 4 indicating the status of the Start button for each controller.
The game checks the status of the controller 1 start button via:

$EA94:A5 DA     LDA $00DA ; Accumulator now has controller 1 state
$EA96:29 10     AND #$10  ; Check if Start pressed
$EA98:F0 1C     BEQ $EAB6 ; If not, go to $EAB6

This hack changes it to:

$EA94:4C 00 BF  JMP $BF00 ; Jump to unused space
$EA97:EA        NOP
$EA98:F0 1C     BEQ $EAB6 ; If Start not pressed, go to $EAB6

$BF00:A5 DA     LDA $00DA ; Accumulator now has controller 1 state
$BF02:05 DB     ORA $00DB ; OR with controller 2 state
$BF04:05 DC     ORA $00DC ; OR with controller 3 state
$BF06:05 DD     ORA $00DD ; OR with controller 4 state
$BF08:29 10     AND #$10  ; Check if Start pressed
$BF0A:4C 98 EA  JMP $EA98 ; Jump back