InSim/Version History

History of all InSim versions. The primary source is the changelog in docs/InSim.txt.

InSim	LFS	Incompatible changes
1	0.3G	Initial version of the InSim system
?	0.5X	Allow up to eight TCP or UDP connections, new buttons system allowing better interface in InSim programs
5	0.6B	Longer IS_MST, lap timing info added to IS_RST
6	0.6H	IS_REO and IS_NLP increased in size to allow 40 drivers, ObjectInfo Zchar changed to Zbyte
7	0.6M	Backward compatibility system by sending InSim version in IS_ISI, Zbyte added to CarContObject and IS_OBH, IS_MSO / IS_III / IS_ACR have variable size, IS_BFN to delete a range of buttons
8	0.6T	New values PMO_POSITION and PMO_GET_Z for PMOAction and new values PMO_SELECTION_REAL, PMO_MOVE_MODIFY, PMO_AVOID_CHECK of PMOFlags in IS_AXM
9	0.7A	New size byte for packets representing packet size / 4, IS_AXM maximum objects increased to 60, IS_MCI maximum cars increased to 16

0.7F5

26 January 2025

IS_AIC / IS_AII / SMALL_AII - set AI controls and get AI info

0.7F

27 July 2024

IS_IPB / TINY_IPB - set / get list of IP bans

0.7E

17 December 2023

License byte added to IS_NCI packet (after Language byte)
IS_PLH packet sets handicaps for individual players
TINY_PLH - request IS_PLH listing player handicaps
SMALL_LCL - full control of lights including fog and extra lights

0.7A

16 December 2021

INSIM_VERSION increased to 9

New size byte for packets - now represents packet size / 4
- this allows much larger packets, up to 1020 bytes
IS_AXM maximum objects increased to 60 (was 30) - see AXM_MAX_OBJECTS
IS_MCI maximum cars increased to 16 (was 8) - see MCI_MAX_CARS
IS_MAL / TINY_MAL - set / get list of mods allowed on host

0.6V

28 February 2021

NLP / MCI minimum time interval reduced to 10 ms (was 40 ms)
IS_CPP FOV can now be used in-car but not smoothed (0 = no change)
IS_CPP Pos is now relative to "Centre view" not the user setting
IS_RES TTime now indicates time since qualifying started
IS_RES PLID is now zero if the player has left the race
IS_NPL Config : setup configuration
IS_NPL Fuel : initial fuel load
IS_NPL RWAdj : tyre width reduction (rear)
IS_NPL FWAdj : tyre width reduction (front)
IS_PIT FuelAdd : fuel added
IS_SPX Fuel200 : fuel remaining
IS_LAP Fuel200 : fuel remaining

0.6T

7 July 2018

INSIM_VERSION increased to 8

New value PMO_POSITION for IS_AXM packet to report a blank position
New packet IS_CIM reports a connection's interface mode
New values TTC_SEL_START and TTC_SEL_STOP for IS_TTC
New value PMO_GET_Z for IS_AXM packet to report Z values
New values PMO_SELECTION_REAL, PMO_MOVE_MODIFY, PMO_AVOID_CHECK

0.6N

24 April 2016

Added ISS_DIALOG and ISS_TEXT_ENTRY to the ISS state flags
New packet SMALL_LCS - set local car switches (lights, horn, siren)

0.6M

13 February 2016

INSIM_VERSION increased to 7

Backward compatibility system - send INSIM_VERSION in the IS_ISI
Older programs (that send zero) are assumed to require version 6
New join request system enabled if ISF_REQ_JOIN is set in IS_ISI
IS_JRR can also be used to reset a car at a specified location
Packet IS_CSC to report changes in car state (currently start or stop)
Zbyte added to CarContObject structure to report car's altitude
Zbyte added to IS_OBH so the layout object can be identified
IS_MSO / IS_III / IS_ACR message out packets now have variable size
IS_BFN can now be used to delete a range of buttons with a single packet
New packet IS_OCO can be used to override specific or all start lights
New IS_AXM option PMO_SELECTION to set the current editor selection
Added TTC_SEL to request an IS_AXM with layout editor selection
Added TINY_AXM to request IS_AXM packets for the entire layout
IS_SSH documentation updated as it is no longer only for bmp files
New packet IS_UCO sends info about InSim checkpoints and circles
New packet IS_SLC reports a connection's currently selected car
Packet TINY_SLC to request an IS_SLC for all connections
Added TINY_ALC and SMALL_ALC to get and set allowed cars (like /cars)
Value 5 (out of bounds) added to the IS_HLV packet

0.6H

2 April 2015

INSIM_VERSION increased to 6

IS_REO and IS_NLP increased in size to allow 40 drivers
ObjectInfo Zchar is now Zbyte - see layout file description
ISP_NCI packet added to give host more info about new guest

0.6C

29 November 2012

Small change to the in-game usage of IS_REO - only valid after SMALL_VTA
Some more values (CPW / OOS / JOOS / HACK) added to the leave reasons

0.6B

17 July 2011

INSIM_VERSION increased to 5

Lap timing info added to IS_RST (Timing byte)
NLP / MCI minimum time interval reduced to 40 ms (was 50 ms)
TINY_VTC now cancels game votes even if the majority has not been reached
IS_MTC (Msg To Connection) now has a variable length (up to 128 characters)
IS_MTC can be sent to all (UCID = 255) and sound effect can be specified
IS_CON reports contact between two cars (if ISF_CON is set)
IS_OBH reports information about any object hit (if ISF_OBH is set)
IS_HLV reports incidents that would violate HLVC (if ISF_HLV is set)
IS_PLC sets allowed cars for individual players
IS_AXM to add / remove / clear autocross objects
IS_ACR reports successful or attempted admin commands
OG_SHIFT and OG_CTRL (keys) bits added to OutGaugePack
New IS_RIP option RIPOPT_FULL_PHYS to use full physics when searching
ISS_SHIFTU_HIGH is no longer used (no high / low view distinction)
FIX: Clutch axis / button was not reported from Controls screen
FIX: TTime in IS_RIP was wrong in mid-joined Multiplayer Replays
FIX: IS_BTN did not allow the documented limit of 240 characters
FIX: OutGaugePack ID was always zero regardless of ID in cfg.txt
FIX: InSim camera with vertical pitch would cause LFS to crash

0.5Z

7 February 2008

NLP / MCI packets are now output at regular intervals
CCI_LAG bit added to the CompCar structure