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Add live/dead description

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Hamish Coleman 2016-06-28 15:06:50 +10:00
parent b4a5c4dca3
commit 282d7b1a90
1 changed files with 15 additions and 5 deletions
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20
docs/table_matrix.txt
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@ -18,7 +18,10 @@ with the second half of each row being unused (except for one anomaly)
This corresponds to the physical hardware, which uses 16 "drive" lines
and 8 "sense" lines - with one extra row, probably for some software keys.
0 1 2 3 4 5 6 7
The hardware "drive" line forms the row number and the "sense" line forms
the column number.
0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
matrix[ 0]: 01 02 11 10 1f 6e 2e 83 ` 1 Q TAB A Esc Z ??
matrix[ 1]: 70 03 12 1e 20 2d 2f 00 F1 2 W CpLk S (|) X
@ -52,7 +55,8 @@ with updating the live/dead key table.
(source: x230 EC firmware version 8DHT34WW, offset 0x218d8)
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
matrix[ 0]: 01 02 11 10 1f 6e 2e 83 ` 1 Q TAB A Esc Z ??
matrix[ 1]: 70 03 12 1e 20 2d 2f 00 F1 2 W CpLk S (|) X
matrix[ 2]: 71 04 13 72 21 73 30 00 F2 3 E F3 D F4 C
@ -74,14 +78,20 @@ matrix[15][15] = 0x96 ??
matrix[16]: 00 9d 00 9e 9f 4a 3a 9c WinR? Pwr? Slp? Wak? CtlL Menu
matrix[16][8] 7d 7e 00 00 00 00 00 00 ScLk Paus
ThinkPad x230 live/dead table:
------------------------------
ThinkPad x230 live/dead bitmap:
-------------------------------
Again, this table is shared with all of the xx30 series laptops. There is
a similar table in the x220 EC firmware, but with a different endianess (as
a result of the different embedded controller used in the x220)
TODO: add description
The live/dead bitmap is an array of 16 words, each word being 16 bits long.
Each detected keypress is looked up in this array - the "drive" line is used
as the index into the array and the "sense" line is the bit number in that
word. If the bit at that location is set, then the keypress is considered
a "live" key and the value from the matrix table is used as the embedded
controller scancode of the key pressed (Note that this scancode is internal
to the EC - it is not the same as the BIOS scancode)
(source: x230 EC firmware version 8DHT34WW, offset 0x219e8)