Function list: Difference between revisions

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! {{tooltip|Thunk address|The address of the function thunk that other functions call.}} ! {{tooltip|Main address|The address that the thunk function jumps to, where the function actually starts}} ! {{tooltip|Return type|The function's return type from the C function signature.}} ! {{tooltip|Calling convention|Typically __cdecl, __stdcall, or __thiscall. Sometimes __usercall or __userpurge in IDA. Write __stdcall if it takes zero arguments.}} ! {{tooltip|Function name|Just the name, not the parameters}} ! {{tooltip|Arguments|What parameters the function takes, or blank for void.}} ! {{tooltip|Status|How well we know what goes on inside the function.}} ! {{tooltip|Related functions|If any, and if not too long to list.}} ! Notes
! {{tooltip|Thunk address|The address of the function thunk that other functions call.}} ! {{tooltip|Main address|The address that the thunk function jumps to, where the function actually starts}} ! {{tooltip|Return type|The function's return type from the C function signature.}} ! {{tooltip|Calling convention|Typically __cdecl, __stdcall, or __thiscall. Sometimes __usercall or __userpurge in IDA. Write __stdcall if it takes zero arguments.}} ! {{tooltip|Function name|Just the name, not the parameters}} ! {{tooltip|Arguments|What parameters the function takes, or blank for void.}} ! {{tooltip|Status|How well we know what goes on inside the function.}} ! {{tooltip|Related functions|If any, and if not too long to list.}} ! Notes
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| 0x40130C || 0x45F760 || {{Win32_BOOL}} || __stdcall || '''SimulationDoDisasterTick''' ||  || Barely explored || Called from '''SimulationStartDisaster''' ||
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| 0x4013ED || 0x42BCA0 || int || __cdecl || '''SimulationCalculateOrdinanceCost''' || DWORD dwOrdinance ||  || Returns the effective cost of an ordinance
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| 0x401460 || 0x44CF60 || char || __cdecl || '''SimulationProvisionMicrosim''' || __int16 a1, int a2, __int16 iTileID || Barely explored || iTileID is the only argument used; needs some RE work for sure
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| 0x4015E6 || 0x4731E0 || int || __cdecl || '''SimulationPrepareBudgetDialog''' || int a1 || Mostly understood ||  || arg a1 only referenced on line, seems to be more like "BOOL bUseParentWindow"
| 0x4015E6 || 0x4731E0 || int || __cdecl || '''SimulationPrepareBudgetDialog''' || int a1 || Mostly understood ||  || arg a1 only referenced on line, seems to be more like "BOOL bUseParentWindow"
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| 0x4022FC || 0x4358B0 || int || __cdecl || '''SimulationGrowthTick''' || __int16 a1, __int16 a2 || Barely explored || Called from '''SimulationProcessTick''' on days 4-17 || The arguments and algorithms are not yet understood.
| 0x4022FC || 0x4358B0 || int || __cdecl || '''SimulationGrowthTick''' || __int16 a1, __int16 a2 || Barely explored || Called from '''SimulationProcessTick''' on days 4-17 || The arguments and algorithms are not yet understood.
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| 0x402527 || 0x45CF10 || int || __stdcall || '''SimulationStartDisaster''' ||  || Somewhat understood || Called from '''GameDoIdleUpkeep''' || Calls the appropriate disaster creation function and then runs disaster ticks
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| 0x4026B2 || 0x4734A0 || int || __usercall || '''SimulationGrowSpecificZone''' || int a1@<ebp>, __int16 iX, __int16 iY, __int16 iTileID, __int16 iZoneType || Barely explored || Called from '''SimulationGrowthTick''' || Might be an omit-frame-pointer function?
| 0x4026B2 || 0x4734A0 || int || __usercall || '''SimulationGrowSpecificZone''' || int a1@<ebp>, __int16 iX, __int16 iY, __int16 iTileID, __int16 iZoneType || Barely explored || Called from '''SimulationGrowthTick''' || Might be an omit-frame-pointer function?
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| 0x401992 || 0x4548C0 || char || __usercall || '''SimulationThingTickMonster''' || int a1@<ebx>, __int16 iXTHGIndex || Barely explored || Called from '''SimulationDoThingTick''' || The function signature of this one is odd and needs investigation.
| 0x401992 || 0x4548C0 || char || __usercall || '''SimulationThingTickMonster''' || int a1@<ebx>, __int16 iXTHGIndex || Barely explored || Called from '''SimulationDoThingTick''' || The function signature of this one is odd and needs investigation.
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| 0x401EBA || 0x452FA0 || int || __cdecl || '''SimulationSpawnMaxisMan''' || __int16 iDisasterID || Barely explored || Creates the Thing for Maxis Man and determines based on iDisasterID what his behavior should be
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| 0x4024AA || 0x455020 || char || __cdecl || '''SimulationThingTickMaxisMan''' || __int16 iXTHGIndex || Barely explored || Called from '''SimulationDoThingTick''' || If you shoot down a helicopter and it lights something on fire, it's your own dang fault
| 0x4024AA || 0x455020 || char || __cdecl || '''SimulationThingTickMaxisMan''' || __int16 iXTHGIndex || Barely explored || Called from '''SimulationDoThingTick''' || If you shoot down a helicopter and it lights something on fire, it's your own dang fault

Revision as of 05:18, 6 March 2025


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This is a table of functions in SimCity 2000 that have been at least partially reverse engineered and given names. It is probably going to be unpleasant to update, but at least it looks nice and you can sort it.

When adding new functions to the table, please make sure you insert them into the appropriate order by thunk address (the function that just has a jmp ActualFunctionBody instruction in it). If/when it gets too unwieldy we can split it out into multiple tables.

Uncategorized functions
Thunk address Main address Return type Calling convention Function name Arguments Status Related functions Notes
0x40130C 0x45F760 BOOL __stdcall SimulationDoDisasterTick Barely explored Called from SimulationStartDisaster
0x4013ED 0x42BCA0 int __cdecl SimulationCalculateOrdinanceCost DWORD dwOrdinance Returns the effective cost of an ordinance
0x401460 0x44CF60 char __cdecl SimulationProvisionMicrosim __int16 a1, int a2, __int16 iTileID Barely explored iTileID is the only argument used; needs some RE work for sure
0x4015E6 0x4731E0 int __cdecl SimulationPrepareBudgetDialog int a1 Mostly understood arg a1 only referenced on line, seems to be more like "BOOL bUseParentWindow"
0x401672 0x441E50 int __cdecl SimulationGrantReward __int16 iRewardID, BOOL bAddReward Mostly understood Adds a city progression reward if (bAddReward), removes it if (!bAddReward).
0x40174E 0x42B4D0 int __cdecl SimulationPrepareDisaster DWORD *a1, __int16 a2, __int16 a3 Somewhat understood Seems to prepare the starting location for disasters.
0x401820 0x413520 void __stdcall SimulationProcessTick Mostly understood Called from GameDoIdleUpkeep based on game speed Advances the calendar date and performs all appropriate daily/monthly/etc. tasks. May need better name?
0x401CA8 0x464550 int __stdcall SimulationUpdateWaterConsumption Barely explored Called whenever tiles are placed and on SimulationProcessTick day 2 Vanilla SC2K doesn't call this when tiles are placed on cities over 50,000 pop.
0x401E65 0x471BC0 char __stdcall SimulationDetermineCityCrisis Somewhat understood Called on the last day of the month and from sub_406A50 Changes the city status line if there's a new demand, and also starts disasters.
0x4022FC 0x4358B0 int __cdecl SimulationGrowthTick __int16 a1, __int16 a2 Barely explored Called from SimulationProcessTick on days 4-17 The arguments and algorithms are not yet understood.
0x402527 0x45CF10 int __stdcall SimulationStartDisaster Somewhat understood Called from GameDoIdleUpkeep Calls the appropriate disaster creation function and then runs disaster ticks
0x4026B2 0x4734A0 int __usercall SimulationGrowSpecificZone int a1@<ebp>, __int16 iX, __int16 iY, __int16 iTileID, __int16 iZoneType Barely explored Called from SimulationGrowthTick Might be an omit-frame-pointer function?
0x4026F8 0x467860 int __stdcall SimulationUpdatePowerConsumption Barely explored Called whenever tiles are placed and on SimulationProcessTick day 21 Vanilla SC2K doesn't call this when tiles are placed on cities over 50,000 pop.
0x402A3B 0x405AB0 DWORD __thiscall GameDoIdleUpkeep CWinApp* this Somewhat understood Called from CWinApp::OnIdle via the class CWinApp vtable Could stand to have a better name.
0x402D2E 0x4734A0 __int16 __stdcall SimulationCalculateBudgetUpdates Barely explored
0x403017 0x4142C0 int __stdcall SimulationProposeMilitaryBase Somewhat understood Called from SimulationProcessTick day 23 and from "gilmartin" cheat
Thing functions
Thunk address Main address Return type Calling convention Function name Arguments Status Related functions Notes
0x402464 0x450890 int __stdcall SimulationDoThingTick Barely explored Called from GameDoIdleUpkeep via sub_401DBB Does the individual simulation ticks for Things every 30-45 ms.
0x401992 0x4548C0 char __usercall SimulationThingTickMonster int a1@<ebx>, __int16 iXTHGIndex Barely explored Called from SimulationDoThingTick The function signature of this one is odd and needs investigation.
0x401EBA 0x452FA0 int __cdecl SimulationSpawnMaxisMan __int16 iDisasterID Barely explored Creates the Thing for Maxis Man and determines based on iDisasterID what his behavior should be
0x4024AA 0x455020 char __cdecl SimulationThingTickMaxisMan __int16 iXTHGIndex Barely explored Called from SimulationDoThingTick If you shoot down a helicopter and it lights something on fire, it's your own dang fault
0x402ED2 0x4540C0 __int16 __cdecl SimulationThingTickHelicopter __int16 iXTHGIndex Barely explored Called from SimulationDoThingTick
Frequently-reused MFC class functions
Thunk address Main address Return type Calling convention Function name Arguments Status Related functions Notes
0x40219E 0x4815E0 INT_PTR __thiscall CGameDialog::DoModal LPCDLGTEMPLATEA* this Understood Called in so many places Seems to pause the simulation, call CDialog::DoModal(this), then restore the simulation.
0x40281A 0x481300 struct CRuntimeClass* __stdcall CGameDialog::GetRuntimeClass Understood
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