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| !! Format Version 1.2 |
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| This version of the format appears in the DS firmware program (IPL2). It requires the use of a supplemental character map file in the form of a [JNCM File|JNCM]. The header takes the following structure: |
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| ||Offset||Type||Meaning |
| | 0x00 | char[[4] | File signature ({{{"JNFR"}}}) |
| | 0x04 | u16 | Version ({{{0x102}}} for 1.2) |
| | 0x06 | u16 | Number of glyphs |
| | 0x08 | u16 | Glyph size. Low 5 bits are glyph width in pixels, the next 5 bits are the glyph height. |
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| Following the header is the glyph width array. These entries take the following structure: |
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| ||Offset||Type||Meaning |
| | 0x00 | u8 | Glyph leading overlap |
| | 0x01 | u8 | Glyph width |
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| After the glyph width array is the glyph pixel data, which consists of 1-bit-per-pixel bitmap data with a halfword-aligned size. |
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| | 0x04 | u16 | Version (0x200) |
| | 0x06 | u16 | Endianness (0xFEFF in the used endianness) |
| | 0x04 | u16 | Version ({{{0x200}}} for 2.0) |
| | 0x06 | u16 | Endianness ({{{0xFEFF}}} in the used endianness) |
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| Next is the glyph pixel data, which consists of 1-bit-per-pixel bitmap data. |
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| The {{{WID1}}} block stores font glyph width information. |
| The {{{WID1}}} block stores font glyph width information. Its structure is the following: |
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| ||Offset||Type||Meaning |
| | 0x08 | u32 | Offset to width data |
| | 0x0C | u16 | Number of entries |
| | 0x0E | u16 | Reserved (0) |
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| Each entry in the width table takes the following structure: |
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| ||Offset||Type||Meaning |
| | 0x00 | u8 | Glyph leading overlap |
| | 0x01 | u8 | Glyph width |
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| The {{{CMP1}}} block stores the character mapping information. |
| The {{{CMP1}}} block stores the character mapping information. Its structure is the following: |
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| ||Offset||Type||Meaning |
| | 0x08 | u32 | Offset to continuous entries |
| | 0x0C | u32 | Offset to direct entries |
| | 0x10 | u16 | Number of continuous entries |
| | 0x12 | u16 | Number of direct entries |
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| The continuous mapping entries define the ranges of code points the font has glyphs for. Each code point within the set of contained code points have incrementing glyph indices. The continuous mapping entry takes this structure: |
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| ||Offset||type||Meaning |
| | 0x00 | u16 | Starting code point |
| | 0x02 | u16 | Ending code point (inclusive) |
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| Next is the direct entries. If a glyph is not found in the continuous glyph map, the direct map is searched next. Each direct entry is a single {{{u16}}} code point. Glyph indices for the direct map come after those in the continuous map. |
