docs: add some hw guides

also remove dead links

docs/Hardware.md

@@ -10,12 +10,10 @@ In general, if the device can show a GNU/Linux desktop, then KlipperScreen shoul
 * [BTT HDMI5/7](https://biqu.equipment/products/bigtreetech-hdmi5-v1-0-hdmi7-v1-0)
 * [Raspberry PI 7" Touchscreen](https://www.raspberrypi.org/products/raspberry-pi-touch-display/)
 * [Hyperpixel 4](https://shop.pimoroni.com/products/hyperpixel-4)
-* [3.5" Elegoo](https://www.elegoo.com/de/products/elegoo-3-5-inch-tft-lcd-screen)
 * [3.5" RPi Display](http://www.lcdwiki.com/3.5inch_RPi_Display)
 * [5" HDMI Display-B](http://lcdwiki.com/5inch_HDMI_Display-B)
 * [VoCore](https://klipper.discourse.group/t/hardware-known-to-work-with-klipperscreen/35/7)
 * [WAVESHARE 4.3 inch DSI LCD](https://www.waveshare.com/4.3inch-dsi-lcd.htm)
-* [DFrobot DFR0550](https://wiki.dfrobot.com/5%27%27TFT-Display_with_Touchscreen_V1.0_SKU_DFR0550)
 * [Android phone](Android.md)
 
 

docs/Hardware/GPIO_35.md

@@ -0,0 +1,49 @@
+
+How i installed the 3.5" (A) type of screen on RaspberryOS Bookworm (Debian 12)
+
+![preview](../img/hardware/rpi35a.jpg)
+
+!!! abstract
+    this is based on my own experience and it's provided for general information
+    and does not constitute as advice of any kind.
+
+
+## Initial install
+
+This screens connect to the [GPIO](https://en.wikipedia.org/wiki/General-purpose_input/output)
+they were usually installed via  repositories named LCD-show ([1](https://github.com/waveshare/LCD-show), [2](https://github.com/goodtft/LCD-show)),
+however in the bookworm release there is a simpler solution
+
+```sh
+sudo nano /boot/firmware/config.txt
+```
+at the bottom add:
+```
+dtoverlay=piscreen,drm
+```
+
+???+ info
+    in this context drm stands for [Direct Rendering Manager](https://en.wikipedia.org/wiki/Direct_Rendering_Manager)
+
+Close the nano editor using `ctrl`+`x` (exit), then `y` for yes (save).
+
+```sh
+sudo reboot
+```
+
+## Wrong colors
+
+Some screens will not behave correctly and display wrong colors,
+this usually due to the wrong [SPI](https://en.wikipedia.org/wiki/Serial_Peripheral_Interface) speed
+In my case I had to use 16 Mhz (default is 24Mhz)
+```
+dtoverlay=piscreen,drm,speed=16000000
+```
+
+## Rotation
+
+You can rotate the screen adding a rotate line with the degrees [0, 90, 180, 270]
+```
+dtoverlay=piscreen,drm,speed=16000000,rotate=180
+```
+Screen rotation will require adjusting the touch matrix see [Touch issues](../../Troubleshooting/Touch_issues/)

docs/Hardware/HDMI.md

@@ -0,0 +1,48 @@
+
+Screens that use HDMI should work out of the box
+
+you may need to configure the resolution in RaspberryOS Bookworm
+you can do this by editing the kernel commandline
+
+```
+sudo nano /boot/firmware/cmdline.txt
+```
+
+!!! tip "Important"
+    Put all parameters in cmdline.txt on the same line, do not use carriage returns.
+
+for example:
+```
+video=1920x1080
+```
+
+more complex example:
+```
+video=HDMI-A-1:1920x1080M@60,rotate=90,reflect_x
+```
+
+| Device      | 	Display                                        |
+|-------------|-------------------------------------------------|
+| HDMI-A-1    | HDMI 1 (sometimes HDMI 0 on PCB)                |
+| HDMI-A-2    | HDMI 2 (sometimes HDMI 1 on PCB if starts at 0) |
+| DSI-1       | DSI or DPI                                      |
+| Composite-1 | Composite                                       |
+
+
+Valid mode specifiers:
+```
+<xres>x<yres>[M][R][-<bpp>][@<refresh-rate>][i][m][eDd]
+```
+options on brackets are optional
+
+| Option          | Description                                                                            |
+|-----------------|----------------------------------------------------------------------------------------|
+| M               | Calculate timings using [CVT](https://en.wikipedia.org/wiki/Coordinated_Video_Timings) |
+| R               | CVT reduced blanking (refresh rate must be 60Hz)                                       |
+| -<bpp>          | Bits per pixel, A.K.A. BitDepth usuallly 24                                            |
+| @<refresh-rate> | acceptable refresh rates are 50, 60, 70 or 85 Hz only                                  |
+| e               | Force enable                                                                           |
+| D               | Force enable Digital mode                                                              |
+| d               | Disable                                                                                |
+
+For more info read [modedb default video mode support](https://docs.kernel.org/fb/modedb.html)

mkdocs.yml

@@ -9,7 +9,10 @@ nav:
     - Home: index.md
     - FAQ: FAQ.md
     - Setup:
-      - Hardware.md
+      - Hardware: Hardware.md
+      - Hardware specific:
+        - GPIO 3.5": Hardware/GPIO_35.md
+        - HDMI: Hardware/HDMI.md
       - Installation.md
       - Updating.md
       - Configuration.md