This keyboard has a strange and painful mapping of the Home,End,PgUp,PgDn keys. Luckily for the keys, we can just pop those suckers off and move them to their “proper” locations. Then with a quick registry entry, set the correct key response to the new locations.<\/p>\n\n\n\n
This post documents a registry-based keyboard remap that swaps the physical Page Up<\/strong> and End<\/strong> keys system-wide, using Windows’ built-in Windows reads a binary value at boot from:<\/p>\n\n\n\n named The value is a sequence of 4-byte DWORD<\/strong> entries. Each byte pair below is written little-endian (low byte first).<\/p>\n\n\n\n Note on entry format:<\/strong> each mapping entry is two 2-byte scan codes \u2014 target first, then source<\/strong> \u2014 read low-byte\/high-byte (little-endian). The Requires an elevated<\/strong> (Run as administrator) Command Prompt, since the key lives under Note: Also requires an elevated Command Prompt, and a reboot afterward.<\/p>\n\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" This keyboard has a strange and painful mapping of the Home,End,PgUp,PgDn keys. Luckily for the keys, we can just pop those suckers off and move them to their “proper” locations. Then with a quick registry entry, set the correct key response to the new locations. This post documents a registry-based keyboard remap that swaps the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-502","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/charlesandrews.us\/index.php\/wp-json\/wp\/v2\/posts\/502","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/charlesandrews.us\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/charlesandrews.us\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/charlesandrews.us\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/charlesandrews.us\/index.php\/wp-json\/wp\/v2\/comments?post=502"}],"version-history":[{"count":1,"href":"https:\/\/charlesandrews.us\/index.php\/wp-json\/wp\/v2\/posts\/502\/revisions"}],"predecessor-version":[{"id":503,"href":"https:\/\/charlesandrews.us\/index.php\/wp-json\/wp\/v2\/posts\/502\/revisions\/503"}],"wp:attachment":[{"href":"https:\/\/charlesandrews.us\/index.php\/wp-json\/wp\/v2\/media?parent=502"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/charlesandrews.us\/index.php\/wp-json\/wp\/v2\/categories?post=502"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/charlesandrews.us\/index.php\/wp-json\/wp\/v2\/tags?post=502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Scancode Map<\/code> mechanism.<\/p>\n\n\n\nOverview<\/h3>\n\n\n\n
HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\Keyboard Layout<\/code><\/pre>\n\n\n\nScancode Map<\/code>, which lets the keyboard driver remap any physical key to send a different scan code before it ever reaches an application. A reboot is required any time this value is changed, since the driver only reads it once at startup.<\/p>\n\n\n\nThe value used to swap Pageup with End[3]<\/h3>\n\n\n\n
hex:00,00,00,00,00,00,00,00,03,00,00,00,49,e0,4f,e0,4f,e0,49,e0,00,00,00,00<\/code><\/pre>\n\n\n\nByte-by-byte breakdown<\/h3>\n\n\n\n
Bytes<\/th> Purpose<\/th> Value<\/th><\/tr><\/thead> 00,00,00,00<\/code><\/td>Header (version field)<\/td> Always 0<\/td><\/tr> 00,00,00,00<\/code><\/td>Header (flags field)<\/td> Always 0<\/td><\/tr> 03,00,00,00<\/code><\/td>Entry count<\/td> 3 \u2014 the total number of 4-byte mapping entries that follow, including<\/strong> the required null terminator<\/td><\/tr> 49,e0, 4f,e0<\/code><\/td>Mapping entry 1<\/td> Target scan code e0,49<\/code> (Page Up) \u2190 Source scan code e0,4f<\/code> (End) \u2014 i.e. pressing End<\/strong> sends Page Up<\/strong><\/td><\/tr>4f,e0, 49,e0<\/code><\/td>Mapping entry 2<\/td> Target scan code e0,4f<\/code> (End) \u2190 Source scan code e0,49<\/code> (Page Up) \u2014 i.e. pressing Page Up<\/strong> sends End<\/strong><\/td><\/tr>00,00,00,00<\/code><\/td>Null terminator<\/td> Marks the end of the mapping list; always required as the final entry<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n e0<\/code> prefix marks an “extended” scan code, used for keys that have a duplicate elsewhere on the keyboard (e.g. Page Up\/Down, End, Home, arrow keys, right-side Ctrl\/Alt).<\/p>\n\n\n\nSetting it via Command Prompt<\/h3>\n\n\n\n
HKEY_LOCAL_MACHINE<\/code>. A reboot<\/strong> is required afterward for the change to take effect.<\/p>\n\n\n\nreg add \"HKLM\\SYSTEM\\CurrentControlSet\\Control\\Keyboard Layout\" \/v \"Scancode Map\" \/t REG_BINARY \/d 00000000000000000300000049e04fe04fe049e000000000 \/f<\/code><\/pre>\n\n\n\nreg add<\/code> for a REG_BINARY<\/code> value takes the hex bytes as one continuous string with no commas or spaces \u2014 different from the comma-separated .reg<\/code> file syntax shown above.<\/p>\n\n\n\nRemoving it<\/h3>\n\n\n\n
reg delete \"HKLM\\SYSTEM\\CurrentControlSet\\Control\\Keyboard Layout\" \/v \"Scancode Map\" \/f<\/code><\/pre>\n\n\n\nVerifying the current value<\/h3>\n\n\n\n
reg query \"HKLM\\SYSTEM\\CurrentControlSet\\Control\\Keyboard Layout\" \/v \"Scancode Map\"<\/code><\/pre>\n\n\n\n