94 lines
3.7 KiB
Text
94 lines
3.7 KiB
Text
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PrBoom compatibility options
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============================
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Some of this is a bit dry. You might want to skip to the bottom and read the
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examples.
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Internally, PrBoom maintains a "compatibility level" which it uses to
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determine how to behave in various circumstances. The supported levels are
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currently:
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Number Name Description
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0 doom_12_compatibility Emulate Doom v1.2 game details where possible
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1 doom_1666_compatibility Behave like Doom v1.666 as far as possible
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2 doom2_19_compatibility As compatible as possible for playing original
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Doom demos
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3 ultdoom_compatibility Ultimate Doom made a few changes
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4 finaldoom_compatibility Compatible with Final Doom & Doom95 - needed
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for some demos recorded with Final Doom doom2.exe
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5 dosdoom_compatibility Emulate early dosdoom versions
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(some TASdoom demos work with this)
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6 tasdoom_compatibility unused
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7 boom_compatibility_compatibility Emulates Boom's compatibility mode
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8 boom_201_compatibility Emulates Boom v2.01
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9 boom_202_compatibility Emulates Boom v2.02
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10 lxdoom_1_compatibility Emulates LxDoom v1.4.x
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11 mbf_compatibility Emulates MBF
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12 prboom_1_compatibility Emulates PrBoom v2.03beta
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13 prboom_2_compatibility PrBoom v2.1.0
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14 prboom_3_compatibility PrBoom v2.1.1-2.2.6
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15 prboom_4_compatibility PrBoom v2.3.x
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16 prboom_5_compatibility PrBoom v2.4.0
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17 prboom_6_compatibility Current PrBoom
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You can cycle through the compatibility levels in the game using the TNTCOMP
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cheat. There's also the default_compatibility_level config file option, and
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the -complevel command line parameter.
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The numbers are subject to change between versions, so if you're doing
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elaborate stuff with these things you're advised to check this file each
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time you upgrade. Most people should just leave default_compatibility_level
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set to -1 in the config file, which means "use most recent" which has most
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features, most bug fixes, etc.
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But some people want to test the behaviour of levels with older versions, and
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will find it helpful to not have to load a dozen games to do so. Some people
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like me play a lot of old levels, so need to be able to enable compatibility
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with some old bugs. And some people may want to record demos for older game
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versions.
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When you play a demo, PrBoom sets the compatibility level and settings
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automatically. When you load a savegame, the settings are restored.
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When you start a new game, the compatibility level is got from (in order of
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preference):
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- -complevel parameter
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- default_compatibility_level config file param if not -1
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- set to the most recent otherwise
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If the compatibility level is MBF or better, the detailed compatibility
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settings are read from the comp_* config file options, as in MBF. Otherwise,
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the settings are put to the defaults for that game version.
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You can adjust the compatibility settings during play from the menus
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(Options->Setup->Doom Compatibility).
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The sort of people interested in these things will already know the MBF
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options, so I'll just list the changes:
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- comp_floors now also causes the original Doom behaviour of objects stuck in
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a ceiling preventing the floor below lowering.
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- new option comp_moveblock enables the old movement clipping bug which
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allows things to go through walls sometimes (mancubus shots, and key
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grabbing tricks)
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PrBoom can also record old demos with some success (demo players see the
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comp_moveblock note above):
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prboom -complevel 2 -record test
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records a doom v1.9 compatible demo
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prboom -complevel 9 -record whatever
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records a Boom (v2.02) demo
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prboom -complevel 11 -record blah
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records an MBF demo.
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Of course, demo recording is no more reliable than demo playback; original
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Doom demos will usually but not always work. MBF support should be perfect.
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- Colin <cph@moria.org.uk>
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