diff --git a/docs/chdk.md b/docs/chdk.md
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-# CHDK PTP Extension
-- Implementation: https://github.com/petabyt/chdk/blob/23c1f3f04fa1c7d483083d403818972a739c6dfd/core/ptp.c#L443
-- Opcode: `0x9999`
-
-All functionality is switched from a code in the first parameter: https://github.com/petabyt/chdk/blob/23c1f3f04fa1c7d483083d403818972a739c6dfd/core/ptp.h#L33C1-L33C1
-
-TODO: Document CHDK extensions
diff --git a/docs/ptp.md b/docs/ptp.md
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-# How does PTP work?
-- PDF Reference for PTP and MTP: https://www.usb.org/document-library/media-transfer-protocol-v11-spec-and-mtp-v11-adopters-agreement
-- PTP/IP has no free public reference :(
-
-Terminology:
-- initiator: the computer that sends commands (laptop, phone, PC)
-- responder: the computer that responds to commands (the camera)
-
-## Quick Overview of PTP Standard
-### To issue a command to the device
-1. Send a *command packet* with up to 5 parameters
-2. An optional data packet (the data phase)
-3. A response packet(s) is recieved from the camera.
-
-For data to be sent to the camera, a data packet can be sent following  
-the command packet. The camera should know when to expect this.  
-
-- Each packet sent to the camera has a unique transaction ID (see PtpBulkContainer.transaction)
-- The operation code (OC) is an ID for each command, and determines how the camera will expect and send back data.
-- In a response packet, the response code (RC) is placed in the PtpBulkContainer.code field
-
-## PTP/IP
-PTP/IP is the variant of PTP designed to be used on TCP.
-
-A standard request to the responder is as follows:
-1. Command request (`PTPIP_COMMAND_REQUEST`) send to responder
-2. If sending data payload:
-	- Set the `data_phase` field in the initial `PTPIP_COMMAND_REQUEST` packet
-	- Send data start packet (`PTPIP_DATA_PACKET_START`), contains data length
-	- Send data end packet (`PTPIP_DATA_PACKET_END`), which includes the actual data
-2. If not sending payload to responder, then, wait for response
-
-Response is either:
-- `PTPIP_DATA_PACKET_START` packet followed by `PTPIP_DATA_PACKET_END`, and finally a `PTPIP_COMMAND_RESPONSE` packet
-- Just a `PTPIP_COMMAND_RESPONSE` packet