SimCity 2000 Bugs - Revision history

AF: /* Windows 95 */

2026-09-30T03:24:38Z

Windows 95

← Older revision		Revision as of 20:24, 29 September 2026
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	===Sign Dialog - sign removed upon pressing Cancel [FIXED]===		===Sign Dialog - sign removed upon pressing Cancel [FIXED]===
	While an existing sign was selected, pressing 'Cancel' would unset the XTXT ID for the given tile coordinate while leaving the XLAB entry present.		While an existing sign was selected, pressing 'Cancel' would unset the XTXT ID for the given tile coordinate while leaving the XLAB entry present.
			===Budget Dialog - scrollbar buttons [PENDING]===
			Scrollbars are used in the Budget Dialog in-order to increase/decrease the various tax/funding rates; if you held the increase/decrease button down it would end up "stopping" on the wrong return message
			and consequently upon using another scrollbar its buttons wouldn't function as expected (increase functionaning as decrease and vice versa). This was ultimately down to a problem handling the SB_ENDSCROLL
			ScrollBar code.

			It should be noted this applies to a higher-degree in the various tax/funding sub-dialogs.

AF: /* Windows 95 */

2026-08-13T09:11:57Z

Windows 95

← Older revision		Revision as of 02:11, 13 August 2026
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	===Scenario Dialog - pictures with anomalous white patches [FIXED]===		===Scenario Dialog - pictures with anomalous white patches [FIXED]===
	This was caused by palette index 1 being erroneously set to index 0 before 0 was swapped with 255. (black <-> white entry swap)		This was caused by palette index 1 being erroneously set to index 0 before 0 was swapped with 255. (black <-> white entry swap)
			===Sign Dialog - sign removed upon pressing Cancel [FIXED]===
			While an existing sign was selected, pressing 'Cancel' would unset the XTXT ID for the given tile coordinate while leaving the XLAB entry present.

AF: /* Windows 95 */ - highlighting fixed bugs

2026-05-14T01:20:34Z

Windows 95: - highlighting fixed bugs

← Older revision		Revision as of 18:20, 13 May 2026
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	The root cause was down to a bad check whereas it was checking against the maximum extent of 128 rather than 127.		The root cause was down to a bad check whereas it was checking against the maximum extent of 128 rather than 127.
			===Map Dialog - missing 'City Center' marker while on the 'Land Value' tab [FIXED]===
			This was caused by a comparison being performed against an orphaned variable.
			===Scenario Dialog - pictures with anomalous white patches [FIXED]===
			This was caused by palette index 1 being erroneously set to index 0 before 0 was swapped with 255. (black <-> white entry swap)

AF: /* Windows 95 */

2025-12-22T19:43:29Z

Windows 95

← Older revision		Revision as of 12:43, 22 December 2025
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	===Simulation remains suspended after cancelling program exit [FIXED]===		===Simulation remains suspended after cancelling program exit [FIXED]===
	If you attempted to exit the game but pressed cancel, the simulation would remain suspended; there was no way of originally getting out of this state except for restarting the program.		If you attempted to exit the game but pressed cancel, the simulation would remain suspended; there was no way of originally getting out of this state except for restarting the program.
			===General Query would fail on objects placed at X coordinate 127 [FIXED]===
			If for instance you attempted to query a road tile (as an example) that was present at X coordinate 127, it would only get so far as to display the Traffic label and then halt.

			The rest of the painting operation would fail due to it hitting an out-of-bounds case within the XTRF array as it tried to check the X + 1 case (128).

			The root cause was down to a bad check whereas it was checking against the maximum extent of 128 rather than 127.

AF: /* Windows 95 */

2025-12-21T15:13:30Z

Windows 95

← Older revision		Revision as of 08:13, 21 December 2025
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	LandVal Bug2.png\|MacOS: On map display of data minimap, showing exact location the bug effects.		LandVal Bug2.png\|MacOS: On map display of data minimap, showing exact location the bug effects.
	</gallery>		</gallery>
			===Simulation remains suspended after cancelling program exit [FIXED]===
			If you attempted to exit the game but pressed cancel, the simulation would remain suspended; there was no way of originally getting out of this state except for restarting the program.

AF: /* Windows 3.11 */

2025-12-21T15:12:13Z

Windows 3.11

← Older revision		Revision as of 08:12, 21 December 2025
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	===EQ decay causing negative overflow===		===EQ decay causing negative overflow===
	===LandValuePollutionMapScan Bug===		===LandValuePollutionMapScan Bug===
			===Simulation remains suspended after cancelling program exit===

	==Windows 95==		==Windows 95==
	===Military Zone development [Fixed]===		===Military Zone development [Fixed]===

NotAnyoneSpecial at 01:53, 15 March 2025

2025-03-15T01:53:39Z

← Older revision		Revision as of 18:53, 14 March 2025
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	==Windows 95==		==Windows 95==
	===Military Zone development [Fixed]===		===Military Zone development [Fixed]===
	Due to an oversight with how the RCI Developer (SimulationPlaceBuilding?) operates the Simulator is unable to build or develop any structures inside a Military zoned tile since the game checks whether the player is able to develop there, which it cannot so it always fails. Except for a single runway ~~tile~~.		Due to an oversight with how the RCI Developer (SimulationPlaceBuilding?) operates the Simulator is unable to build or develop any structures inside a Military zoned tile since the game checks whether the player is able to develop there, which it cannot so it always fails. Except for a single runway for Airbases.
	===Military Base - Army [Fixed]===		===Military Base - Army [Fixed]===
	Although the Army Base is a possibility for the '''SimulationProposeMilitaryBase''' function, it does not handle the setup and preparation of the selected area correctly. The function is entirely missing the placement of roads and any runway cross-tiles as correctly seen in the DOS port and Apple version. Instead a 8x8 zoned area is placed down like the air force base and the function is done.		Although the Army Base is a possibility for the '''SimulationProposeMilitaryBase''' function, it does not handle the setup and preparation of the selected area correctly. The function is entirely missing the placement of roads and any runway cross-tiles as correctly seen in the DOS port and Apple version. Instead a 8x8 zoned area is placed down like the air force base and the function is done.

NotAnyoneSpecial at 01:31, 15 March 2025

2025-03-15T01:31:01Z

← Older revision		Revision as of 18:31, 14 March 2025
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	'''TODO:''' Explain this, need more reverse-devs to look at '''0x4CC6F8''' in [[SimulationPollutionTerrainLandValueScan]]('''0x46A840''')		'''TODO:''' Explain this, need more reverse-devs to look at '''0x4CC6F8''' in [[SimulationPollutionTerrainLandValueScan]]('''0x46A840''')

	The Simcity 2000 Simulator for Pollution, Land Value, Crime, and etc uses many internal hidden "maps" in order to compute and track the last value for pollution on the map. One of these map arrays can get "confused" due to the different scale these internal hidden maps work since they're re-used for multiple purposes. This can result in instances of very high or low land value carrying over from ~~strong negative or positive effects, such as~~ high pollution resulting in ~~very~~ high land value at 2x the X coordinate and 2x the Y coordinate.		The Simcity 2000 Simulator for Pollution, Land Value, Crime, and etc uses many internal hidden "maps" in order to compute and track the last value for pollution on the map. One of these map arrays can get "confused" due to the different scale these internal hidden maps work since they're re-used for multiple purposes. This can result in instances of very high or low land value carrying over from previously calculated areas of high pollution resulting in erroneously high land value at 2x the X coordinate and 2x the Y coordinate.
	<gallery>		<gallery>
	LandVal Bug.png\|MacOS: Map view with minimap display, showing the Coal Power plant.		LandVal Bug.png\|MacOS: Map view with minimap display, showing the Coal Power plant.
	LandVal Bug2.png\|MacOS: On map display of data minimap, showing exact location the bug effects.		LandVal Bug2.png\|MacOS: On map display of data minimap, showing exact location the bug effects.
	</gallery>		</gallery>

NotAnyoneSpecial at 01:29, 15 March 2025

2025-03-15T01:29:10Z

← Older revision		Revision as of 18:29, 14 March 2025
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	Different versions of Simcity 2000 have different bugs.		Different versions of Simcity 2000 have different bugs.

	==~~Apple~~==		==Mac OS==
	===EQ decay causing negative overflow===		===EQ decay causing negative overflow===
	===LandValuePollutionMapScan Bug===		===LandValuePollutionMapScan Bug===
Line 30:		Line 30:

	The Simcity 2000 Simulator for Pollution, Land Value, Crime, and etc uses many internal hidden "maps" in order to compute and track the last value for pollution on the map. One of these map arrays can get "confused" due to the different scale these internal hidden maps work since they're re-used for multiple purposes. This can result in instances of very high or low land value carrying over from strong negative or positive effects, such as high pollution resulting in very high land value at 2x the X coordinate and 2x the Y coordinate.		The Simcity 2000 Simulator for Pollution, Land Value, Crime, and etc uses many internal hidden "maps" in order to compute and track the last value for pollution on the map. One of these map arrays can get "confused" due to the different scale these internal hidden maps work since they're re-used for multiple purposes. This can result in instances of very high or low land value carrying over from strong negative or positive effects, such as high pollution resulting in very high land value at 2x the X coordinate and 2x the Y coordinate.
			<gallery>
			LandVal Bug.png\|MacOS: Map view with minimap display, showing the Coal Power plant.
			LandVal Bug2.png\|MacOS: On map display of data minimap, showing exact location the bug effects.
			</gallery>

NotAnyoneSpecial: added new bug

2025-03-15T01:17:32Z

added new bug

← Older revision		Revision as of 18:17, 14 March 2025
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	==Apple==		==Apple==
	===EQ decay causing negative overflow===		===EQ decay causing negative overflow===
			===LandValuePollutionMapScan Bug===
	==DOS==		==DOS==
	===Industrial Connex Bug===		===Industrial Connex Bug===
	===EQ decay causing negative overflow===		===EQ decay causing negative overflow===
			===LandValuePollutionMapScan Bug===
	==Windows 3.11==		==Windows 3.11==
	===Military Zone development===		===Military Zone development===
Line 12:		Line 14:
	===Industrial Connex Bug===		===Industrial Connex Bug===
	===EQ decay causing negative overflow===		===EQ decay causing negative overflow===
			===LandValuePollutionMapScan Bug===
	==Windows 95==		==Windows 95==
	===Military Zone development [Fixed]===		===Military Zone development [Fixed]===
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	===EQ decay causing negative overflow===		===EQ decay causing negative overflow===
	In cities with no Schools or Colleges and no Pro-Reading Ordinance, over time and with extreme population stability the decay in EQ will become so severe that it causes a negative overflow resulting in the EQ subsystem having unintended outcomes such as an average EQ of 12948.		In cities with no Schools or Colleges and no Pro-Reading Ordinance, over time and with extreme population stability the decay in EQ will become so severe that it causes a negative overflow resulting in the EQ subsystem having unintended outcomes such as an average EQ of 12948.
			===LandValuePollutionMapScan Bug===
			'''TODO:''' Explain this, need more reverse-devs to look at '''0x4CC6F8''' in [[SimulationPollutionTerrainLandValueScan]]('''0x46A840''')

			The Simcity 2000 Simulator for Pollution, Land Value, Crime, and etc uses many internal hidden "maps" in order to compute and track the last value for pollution on the map. One of these map arrays can get "confused" due to the different scale these internal hidden maps work since they're re-used for multiple purposes. This can result in instances of very high or low land value carrying over from strong negative or positive effects, such as high pollution resulting in very high land value at 2x the X coordinate and 2x the Y coordinate.