diff --git a/docs/pico_hid.md b/docs/pico_hid.md
index f3fe537..5272b00 100644
--- a/docs/pico_hid.md
+++ b/docs/pico_hid.md
@@ -43,6 +43,54 @@ Connect all the parts according to the scheme:
+### PS/2 Keyboard & Mouse
+
+!!! warning
+ PS/2 is not implemented now. Soon (r) (c) (tm)
+
+If you need PS/2 keyboard and mouse support, you will need a few additional components.
+The soldering skill will also not be superfluous.
+
+* *x1* 3.3V/5V bi-directional logic level shifter [like this](https://learn.sparkfun.com/tutorials/bi-directional-logic-level-converter-hookup-guide/).
+* Optional: *x2* PS/2 cable with male connector (can be cut off from the old keyboard and mouse).
+
+Connect all parts to the Pico HID, and don't forget to enable PS/2 mode support as described in the next paragraph.
+
+??? example "Level shifter and PS/2 wiring"
+
+ Make sure that the level shifter pinout matches the scheme, and connect everything according to the [Pico pinout](https://pico.pinout.xyz).
+
+ ```
+ _________________
+ | |
+ Pico GP11 ______| LV1 HV1 |______ PS/2 keyboard data
+ Pico GP12 ______| LV2 HV2 |______ PS/2 keyboard clock
+ Pico GP13 ______| LV HV |______ PS/2 5V
+ Pico GND ______| GND GND |______ PS/2 GND
+ Pico GP14 ______| LV3 HV3 |______ PS/2 mouse data
+ Pico GP15 ______| LV4 HV4 |______ PS/2 mouse clock
+ |_________________|
+
+ ```
+
+ You can take the 5V power line from one of the PS/2, for example from the keyboard,
+ or from both at once, but make sure with a multimeter that it is the same line
+ on both PS/2 female connectors.
+
+
+
+ PS/2 female socket pinout of the keyboard and mouse on the motherboard is the same.
+ A purple socket is usually responsible for the keyboard, and a green one for the mouse.
+ If your motherboard only have one port, it's probably universal and can be used either
+ for the keyboard or for the mouse. Most likely, it is painted in two colors at once.
+
+ Use a multimeter to determine the purpose of the wires in your PS/2 cables.
+
+ A good idea is to mount the level shifter on top of the Pico, as in this photo:
+
+
+
+
-----
## Configuring the HID modes
@@ -67,9 +115,6 @@ some GPIOs with Ground (`GND`) lines.
!!! example
To enable Windows 98 absolute mouse, just connect pin `GP9` to any `GND` [on the Pico](https://pico.pinout.xyz).
-!!! warning
- PS/2 is not implemented now. Soon (r) (c) (tm)
-
-----
## Flashing the firmware
diff --git a/docs/ps2_level_shifter_soldering.png b/docs/ps2_level_shifter_soldering.png
new file mode 100644
index 0000000..1e6d051
Binary files /dev/null and b/docs/ps2_level_shifter_soldering.png differ
diff --git a/docs/ps2_pinout.png b/docs/ps2_pinout.png
new file mode 100644
index 0000000..1ac19da
Binary files /dev/null and b/docs/ps2_pinout.png differ