Add konami identifiers documentation

Includes explanation of the differnet known identifiers,
formats and different values assigned to parts of the identifier.

konami/identifiers.md

@@ -0,0 +1,128 @@
+# Konami Identifiers
+
+This file describes the various identifiers and their formats that are used in products by Konami.
+
+## Sources
+
+* [bemaniwiki](http://bemaniwiki.com/)
+* Game/cabinet manuals
+* MAME
+* Various sources around the internet
+
+## Format
+
+The format of each identifier/ID is described as a perl/php/shell-style string with `$` denoting
+that a variable is resolved, e.g. `$a` "resolve variable a". Additionally, a more complex regex
+string is provided to constrain the format properly.
+
+### Variables and values
+
+The following variables are used across the different identifiers and can denote the listed values:
+
+* `$p`: Product
+  * `G`: Game
+* `$t`: Type of product
+  * `C`: Upgrade: software only
+  * `E`: Upgrade: hardware (conversion) kit + software
+  * `K`: Upgrade: offline/no eamuse software version
+  * `N`: ???
+  * `O`: ???
+  * `Q`: Dedicated cabinet assembly/main body
+  * `U`: "Utilities", e.g. DVD software update kit, replacement monitors
+  * `X`: Hardware/board ???
+* `$g`: Gamecode, identifies a game or series in [Konami's product portfolio](products.md)
+  * Format: `yxx`
+    * `y`: `A` + (project development start year - 2000) (`L`: 2011, `T`: 2019, etc.)
+    * `xx`: Remainder, (incremental) game/product identifier
+  * Example: `LDJ`
+* `$d`: Destination, target locale/market
+  * `A`: Asia
+  * `C`: China
+  * `E`: Europe
+  * `J`: Japan
+  * `K`: Korea
+  * `U`: US
+  * `Y`: Indonesia
+* `$s`: Specification: Product type and game dependent, e.g. type of cabinet or hardware
+  * `A`, `B`, `C`, ..., `Z`
+* `$r`: Software revision. Modern games utilizing the extension part pinned this to the value `A`
+  * `A`, `B`, `C`, ..., `Z`
+* `$e`: Extension/build date of the software
+  * Format: `yyyymmddnn`
+    * `yyyy` = year, e.g. `2020`
+    * `mm` = month, e.g. `11` for November
+    * `dd` = day of month, e.g. `03`
+    * `nn` = build number on the day, e.g. `00`, `01`, ...
+  * Example: `201807300200`
+
+## Identifiers
+
+### Product identifier
+
+* [Products or packages](products.md) that can be acquired, e.g. bought or leased
+* Format: `$p$t$g-$d$s`
+* Example: [GQLDJ-JA](product/GQLDJ-JA.md)
+
+### Mcode
+
+* Source: License dongle certificate CN
+* Format: `$g-$n`
+  * `$n`: An integer number, e.g. `001`
+* Example: `PIX-001`
+
+### Security code
+
+* Source: License dongle certificate subjectAltName
+* Format: `$p$t$g$d$s$r`
+* Example: `GQPIXJBA`
+
+### Release code
+
+* Source: Game data
+* Format: `$e`
+* Example: `201807300200`
+
+### System ID
+
+* Source: Account dongle certificate CN
+* Format: `0120$x0$y`
+  * `$x`: `1` or `2`
+  * `$y`: 14-digit hex string
+* Example: `0120100000000160B3D2`
+
+### License ID
+
+* Source: License dongle serial number
+* Format: `012$x$y`
+  * `$x`: `1` or `2`
+  * `$y`: 8-digit numeric value
+* Example: `012194810293`
+
+### Account ID
+
+* Source: Account dongle serial number
+* Format: `012$x$y`
+  * `$x`: `1` or `2`
+  * `$y`: 8-digit numeric value
+* Example: `012291862492`
+
+### Hardware ID
+
+* Source: MAC address
+* Format: `0100$y`
+  * `$y`: 12-digit hex string
+* Example: `0100705CAD0365F2`
+
+### Software ID
+
+* Alias for License ID
+* Format: `012$x$y`
+  * `$x`: `1` or `2`
+  * `$y`: 8-digit numeric value
+* Example: `012194810293`
+
+### Soft ID code
+
+* Source: [Security code](#security-code) and [release code](#release-code) combined and shown in-game
+* Format: `$g:$d:$s:$r:$e`
+* Example: `PIX:J:B:A:201807300200`