Difference between revisions of "User:Morgan525"
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.text:00432191 xor edx, edx ;edx & dx = 0 | .text:00432191 xor edx, edx ;edx & dx = 0 | ||
| − | .text:00432194 cmp bx, dx | + | .text:00432194 cmp bx, dx ;bx = zonenum |
.text:00432197 jnz loc_432230 ;if zonenum!=0 goto 432230* | .text:00432197 jnz loc_432230 ;if zonenum!=0 goto 432230* | ||
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Revision as of 01:33, 6 December 2014
I'm also known as "Tycho" on StrategyCore forums. I've been studying disassembly and C++ coding since December of 2011. This all started because I wanted to mod the tank/cannon of '94 Enemy Unknown into a tank/chaingun for my own games. I started playing the DOS version but eventually switched to the CE version. At first, I focused on the sound problems which is when I started to experiment with Seb76's UFOloader.
UFO Extender
This is the original program created by Seb76 for use with Enemy Unknown. Check out the UFO Extender's Information Page. You can download the latest version and patches here: UFOextender.
If you're interested in the source code, it is available. Be warned you'll need to decompile the executable and be familiar with disassembly terminology to understand a lot of what the Extender does, since it inserts new lines into preexisting code. The source files for the Extender are here: File:UFOExtender-src.zip.
TFTD Extender
It adds a lot of functionality and fixes to the Collector's Edition (MS Windows version) of Terror from the Deep. Click on the title to get to the information page.
For those interested, here is the source code for the Extender.
Other information
.text:00432160 mov cx, [esp+missiontype] .text:00432165 push ebx .text:00432166 mov ebx, [esp+4+zonenum] .text:0043216A push .text:0043216B movsx .text:0043216E push .text:0043216F lea .text:00432176 movsx .text:00432179 sub .text:0043217B mov eax, dwpMISSIONSDAT_49B220 .text:00432180 add .text:00432182 cmp cx, 3 .text:00432186 mov .text:0043218B jnz loc_4326E1 ;if missiontype is not 3 goto 4326E1 ------------------------------------------------------------------------------------------------ <MISSION TYPE 3 - infiltration .text:00432191 xor edx, edx ;edx & dx = 0 .text:00432194 cmp bx, dx ;bx = zonenum .text:00432197 jnz loc_432230 ;if zonenum!=0 goto 432230* ------------------------------- <ZONE 0 - North America> .text:0043219D cmp wDIP_USA_b2_4728FA, dx .text:004321A4 jz short loc_4321EA ;if DIP.USA.b2 = 0 goto 4321EA -------------- <USA> .text:004321A6 mov wDIP_USA_b1E_472916, 1 .text:004321AF mov [eax+18h], dx .text:004321E5 jmp loc_432695 -------------- <CANADA> .text:004321EA mov wDIP_CAN_b1E_472B32, 1 ;set DIP.CAN.byte 1E=1 .text:004321F3 mov word ptr [eax+18h], 0FFFFh ;disables infiltration in MISSION.DAT .text:0043222B jmp loc_432695 ---------------------------------- .text:00432230 cmp bx, 3 ;if zonenum!=3 goto 43227F .text:00432234 jnz short loc_43227F ---------------------------------- .text:0043227F cmp bx, 4 ;if zonenum != 4 goto 432412 .text:00432283 jnz loc_432412 -------------- <ZONE 4 - EUROPE> .text:00432289 cmp wDIP.UK.b2_472942, dx .text:00432290 jz short loc_4322D9 .text:004322D9 cmp wDIP.FRA.b2_472966, dx .text:004322E0 jz short loc_432329 .text:00432329 cmp wDIP.GER.b2_47298A, dx .text:00432330 jz short loc_432379 .text:00432329 cmp wDIP.ITA.b2_47298A, dx .text:00432330 jz short loc_432379 ----------------------------------------------------------- ----------------------------------------------------------- .text:00432695 mov eax, dwpMISSIONSDAT_49B220 .text:0043269A cmp [eax+edi*8+18h], dx .text:0043269F jnz short loc_4326D2 ;if UFO counter !=0 goto loc_4326D2 ------------- .text:004326A1 mov si, word_470F36 ;time for first infiltration counter .text:004326AD movsx ecx, si .text:004326B1 push ecx .text:004326B2 call sGetRandomNum_43D850 <more calculation> .text:004326CD mov [edx+edi*8+1Ch], cx :byte 1C = rand(time)+(time/2) ------------- .text:004326D2 push ebp .text:004326D3 push ebx .text:004326D4 call sCreateAlienBase_432700 .text:004326E0 retn
This routine is called when infiltration or Alien Base missions are complete. The first section checks to see what the mission is. If the mission is not infiltration, the routine skips to the code to spawn a base and exits. For infiltration, the next check is what zone the mission is in.
- If the zone is 0, it checks byte 4728FA (which is byte 2 of the USA entry in the DIPLOMAT.DAT array).
- If this is not 0, it sets byte 1E (to indicate that the USA will sign a pact at the end of the month), gives points to the aliens in North America and USA, and resets the UFO Counter entry in MISSION.DAT to 0.
- If the USA byte 2 is 0, CANADA is set to leave at the end of the month and scores for the aliens are given but the entry in MISSION.DAT is set to 0xFFFF to disable the mission. (no countries left in America to infiltrate.)
Once either of these has been done, the routine jumps to the end where it checks the UFO counter in MISSIONS.DAT for the current zone. If it is 0, it randomly determines a time and sets the timer. Then the routine calls the "spawn alien base" routine and exits.