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NeoLemmix 2KB Level Format
Note that some bytes are mixed together with others, so this is a bit out of order.
2KB levels are always assumed to be 1584x160 in size, with the VGASPEC (if any) placed at 304, 0.
All multi-byte values are big endian.
| Address | Data | | 0x00 | Should always be 0x00.
A value of 0x01, 0x02 or 0x03 identifies a 10KB level.
A value of 0x04 or higher identifies a variable-size level. | | 0x01 | Release rate (1~99) | 0x02
0x03 | Number of lemmings
Can be up to 65535, but recommended maximum is ~500 | 0x04
0x05 | Save requirement
This is a number of lemmings, not a percent | | 0x06 | Seconds of time limit (0~59) | | 0x07 | Minutes of time limit (0~99)
For infinite time, set this higher than 99 minutes | 0x08
0x0A
0x0C
0x0E | Gimmick flags
These are the same as in the 10KB format | | 0x10 | Oddtable target rank | | 0x12 | Oddtable target level | 0x14
0x16 | Skillset flags
These are the same as in the 10KB format | 0x09
0x0B
0x0D
0x0F
0x11
0x13
0x15
0x17 | Skill quantities
These are one byte per skill, in the in-game order, and only skills that are in the level's skillset are included
This should be in the range 0~99, values over 99 are treated as infinite | 0x18
0x19 | Horizontal screen start position | | 0x1A | Music track number. The same special values apply as in the 10KB format | | 0x1B | Graphic set number | | 0x1C | Level options flags:
Bit 0 - Steel areas #16 onwards are treated as negative steel
Bit 1 - Enable autosteel
Bit 2 - Ignore level's steel areas
Bit 3 - Use the simple autosteel formula
Bit 4 - Copy the level layout from the oddtable level
Bit 5 - Use the gimmick flags; otherwise the gimmick code is used instead
Bit 6 - Use the skillset flags, otherwise the skillset is the 8 traditional skills
Bit 7 - Unused | | 0x1D | VGASPEC number
0 means no VGASPEC, 1 = VGASPEC0, 2 = VGASPEC1, etc | 0x1E
0x1F | Gimmick code
This
is used if the option to use gimmick flags isn't set, and if the code
doesn't correspond to any gimmick or gimmick combination, the level has
no gimmick | | 0x20 | Object data (32 slots) | | 0x120 | Terrain data (400 slots) | | 0x760 | Steel data (32 slots) | | 0x7E0 | Level title (32 bytes of text) |
Object data format
| Address | Data | 0x00
0x01 | X
coordinate. A value of 0 here corresponds to a position of -16, a value
of 16 corresponds to a position of 0, a value of 32 would be X = 16, etc | 0x02
0x03 | Y coordinate.This is a signed value | | 0x04 | L value. The effect of this depends on the object type | | 0x05 | Piece number | | 0x06 | S value and some flags:
Bit 0 to Bit 3 - S value. The effect of this depends on the object type
Bit 4 - Object is fake
Bit 5 - Object is left-facing (window, pre-placed lemming, teleporter, splitter)
Bit 6 - Draw object only on terrain
Bit 7 - Draw object behind terrain | | 0x07 | 0x0F for normal
0x8F for upside down |
Unused slots should be blanked out with 0x00s.
Terrain data format
| Address | Data | 0x00
0x01 | Bit
12 - Add 64 to piece ID if set.
Bit 13 - Acts as eraser
Bit 14 - Upside down
Bit 15 - Draw behind earlier pieces
The rest of these bytes is the X position; like with the objects it is offset by 16 | | 0x02 | Y
position. This is a 9-bit value, so it overflows into 0x03's Bit 7
(which is the least significant bit). This is also offset by 4 (ie: a
value of 0 means a Y position of -4), and is a signed value. | | 0x03 | Bit 7 - See above
Bit 6 - Should always be off.
The rest of this is the piece ID's lower 6 bits. |
Unused slots should be blanked out with 0xFFs.
Steel data format
| Address | Data | | 0x00 | X
coordinate. This is a 9-bit value that leaks into the next byte, in the
same way as terrain Y coordinate does. The stored value is actually
1/4th of the actual value; eg. a value of 5 should be read as 20.
Additionally, it has the same offsetting by 16 as object and terrain X
positions do. | | 0x01 | Bit 7 - See above.
The rest of this byte is the Y position; like the X coordinate the stored value is 1/4th of the actual value. | | 0x02 | Bit 4 to Bit 7 is the width
Bit 0 to Bit 3 is the height
Both
of these are offset by -4 (ie: a value of 8 means a size of 12), and
are stored as 1/4 of the actual value just like the coordinates. | | 0x03 | This
byte is four 2-bit values which are treated as offsets for the
coordinates and dimensions. Each value here is subtracted from the
value obtained from the above bytes.
Bit 6-7 - X position
Bit 4-5 - Y position
Bit 2-3 - Width
Bit 0-1 - Height |
Unused slots should be blanked out with 0x00s.
Gimmick codes
| Code | Gimmick(s) | | 0x4200 | Plays the gimmick music without giving any gimmick | | 0x4201 | Frenzy
SuperLemming | | 0x4202 | Frenzy | | 0x4203 | Reverse Skill Counts | | 0x4204 | Karoshi | | 0x4205 | Unalterable Terrain | | 0x4206 | Overflow | | 0x4207 | No Gravity | | 0x4208 | Hardworkers | | 0x4209 | Frenzy
SuperLemming
Karoshi
Unalterable Terrain | | 0x420A | SuperLemming, plays gimmick music rather than Frenzy music | | 0x420B | Backwards Walkers | | 0x420C | Lazy Lemmings | | 0x420D | Exhaustion | | 0x420E | Frenzy
Exhaustion | | 0x420F | Lazy Lemmings
Exhaustion | | 0x4210 | No Gravity
Hardworkers | | 0x4211 | Nonfatal Bombers | | 0x4212 | Invincibility | | 0x4213 | One Skill Per Lemming | | 0xFFFF | SuperLemming |
Gimmicks (or combinations of gimmicks) without a code listed here must be set via the gimmick flags. |