The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 03, 2025
Filed:
Mar. 28, 2023
Dell Products L.p., Round Rock, TX (US);
Ibrahim Sayyed, Georgetown, TX (US);
Jagadish Babu Jonnada, Leander, TX (US);
Phanindra Talasila, Austin, TX (US);
Laxmi Lavanya Medicherla, Georgetown, TX (US);
Anand Prakash Joshi, Round Rock, TX (US);
Dell Products L.P., Round Rock, TX (US);
Abstract
An operating system (OS) software service detects an accessibility change event and takes a snapshot of the accessibility settings before sending and receiving memory-mapped input/output (MMIO) commands with an embedded controller (EC) to establish trust using existing security hardening methods. The software service may send an MMIO command that includes the profile as a payload to the EC. The EC extracts the profile payload and saves it to an NVRAM variable before signaling a basic input/output system (BIOS) during early boot of an available accessibility profile. The EC publishes an accessibility profile presence to a BIOS pre-EFI initialization (PEI) layer, which sends a command to the EC to return the response. The BIOS creates a new hand off block (HOB) command indicative of the accessibility profile and passes this to an early Driver Execution Environment (DXE) stage, which reads the HOB data and locates the accessibility layer within a serial peripheral interface (SPI) firmware volume and loads into memory. This extracted profile information is passed onto the accessibility layer, which applies the profile data to user interface (UI) control attributes.