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101 lines
5.0 KiB
Plaintext
101 lines
5.0 KiB
Plaintext
The basic design of the thinkpad keyboard is one of a 16 column matrix
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with 8 rows. While this layout is not specifically related to the
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physical layout of the actual keys, some of it is dictated by that layout.
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The mapping of logical-row+column into a EC scancode is done with a
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table in the EC firmware. This table is largely the same between all
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the models investigated and served as the basis of the classic keyboard
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modification.
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ThinkPad x220 matrix:
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---------------------
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This table is arranged in an array of bytes that is 16 columns by 17 rows,
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with the second half of each row being unused (except for one anomaly).
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This corresponds to the physical hardware, which uses 16 "drive" lines
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and 8 "sense" lines - with one extra row, probably for some software keys.
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The hardware "drive" line forms the row number and the "sense" line forms
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the column number.
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0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
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matrix[ 0]: 01 02 11 10 1f 6e 2e 83 ` 1 Q TAB A Esc Z ??
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matrix[ 1]: 70 03 12 1e 20 2d 2f 00 F1 2 W CpLk S (|) X
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matrix[ 2]: 71 04 13 72 21 73 30 00 F2 3 E F3 D F4 C
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matrix[ 3]: 06 05 14 15 22 23 31 32 5 4 R T F G V B
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matrix[ 4]: 07 08 17 16 25 24 34 33 6 7 U Y J H M N
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matrix[ 5]: 0d 09 18 1c 26 75 35 38 = 8 I ] K F6 , (/)
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matrix[ 6]: 77 0a 19 76 27 84 36 85 F8 9 O F7 L ?? . ??
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matrix[ 7]: 0c 0b 1a 1b 28 29 2a 37 - 0 P [ ; ' (#) ?
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matrix[ 8]: 78 79 0e 0f 1d 74 2b 3d F9 F10 ?? BS \ F5 Ent Spc
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matrix[ 9]: 4b 7b 00 9b 00 00 00 59 Ins F12 WinL Rgt
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matrix[10]: 4c 7a 9a 99 98 97 a0 54 Del F11 Vol+ Vol- Mute IBM Mic Down
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matrix[11]: 55 56 00 00 9c 00 89 8a PgUp PgDn Menu PgBk PgFd
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matrix[12]: 50 51 00 00 00 53 7e 4f Home End Up Paus Left
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matrix[13]: 00 7c 7d 00 00 3c 00 3e PrSc ScLk AltL AltR
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matrix[14]: 00 00 00 2c 00 00 39 00 SftL SftR
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matrix[15]: 3a 00 00 00 00 00 40 00 CtlL CtlR
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matrix[15][15] = 0x96 ??
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matrix[16]: 00 9d 00 9e 9f 4a 3a 00 WinR? Pwr? Slp? Wak? CtlL
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Unknown key codes: 0x0e 0x83 0x84 0x85 0x96
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(source: x220 EC firmware version 8DHT34WW, offset 0x1f080)
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ThinkPad x230 matrix:
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---------------------
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The x230 uses the same basic table layout as the x220 and shares its
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contents with all of the xx30 series laptops. The basic classic keyboard
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fix was made by updating the x230 table to look like the x220, combined
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with updating the live/dead key table.
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0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
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matrix[ 0]: 01 02 11 10 1f 6e 2e 83 ` 1 Q TAB A Esc Z ??
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matrix[ 1]: 70 03 12 1e 20 2d 2f 00 F1 2 W CpLk S (|) X
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matrix[ 2]: 71 04 13 72 21 73 30 00 F2 3 E F3 D F4 C
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matrix[ 3]: 06 05 14 15 22 23 31 32 5 4 R T F G V B
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matrix[ 4]: 07 08 17 16 25 24 34 33 6 7 U Y J H M N
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matrix[ 5]: 0d 09 18 1c 26 75 35 38 = 8 I ] K F6 , (/)
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matrix[ 6]: 77 0a 19 76 27 84 36 85 F8 9 O F7 L ?? . ??
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matrix[ 7]: 0c 0b 1a 1b 28 29 2a 37 - 0 P [ ; ' (#) ?
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matrix[ 8]: 78 79 0e 0f 1d 74 2b 3d F9 F10 ?? BS \ F5 Ent Spc
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matrix[ 9]: 00 7b 00 9b 00 00 00 59 F12 WinL Rgt
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matrix[10]: 50 7a 9a 99 98 97 a0 54 Home F11 Vol+ Vol- Mute IBM Mic Down
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matrix[11]: 4c 4b 00 00 7c 00 55 56 Del Ins PrSc PgUp PgDn
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matrix[12]: 00 51 00 00 00 53 00 4f End Up Left
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matrix[13]: 00 00 00 00 00 3c 00 3e AltL AltR
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matrix[14]: 00 00 00 2c 00 00 39 00 SftL SftR
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matrix[15]: 3a 00 00 00 00 00 40 00 CtlL CtlR
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matrix[15][15] = 0x96 ??
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matrix[16]: 00 9d 00 9e 9f 4a 3a 9c WinR? Pwr? Slp? Wak? CtlL Menu
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matrix[16][8] 7d 7e 00 00 00 00 00 00 ScLk Paus
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Unknown key codes: 0x0e 0x83 0x84 0x85 0x96
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(source: x230 EC firmware version G2HT35WW, offset 0x218d8)
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ThinkPad x230 live/dead bitmap:
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-------------------------------
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Again, this table is shared with all of the xx30 series laptops. There is
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a similar table in the x220 EC firmware, but with a different endianess (as
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a result of the different embedded controller used in the x220)
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The live/dead bitmap is an array of 16 words, each word being 16 bits long.
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Each detected keypress is looked up in this array - the "drive" line is used
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as the index into the array and the "sense" line is the bit number in that
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word. If the bit at that location is set, then the keypress is considered
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a "live" key and the value from the matrix table is used as the embedded
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controller scancode of the key pressed (Note that this scancode is internal
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to the EC - it is not the same as the BIOS scancode)
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(source: x230 EC firmware version G2HT35WW, offset 0x219e8)
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