Yes, it is possible to interface SL811HS with an Operating System less environment to transfer data to the printer. We have a design example for this kind of application, which should give a head start in developing such an application. However, this design example is for our EZ-OTG / EZ-Host family of devices. It is an Operating System less application running on our CY16 core instead of the 8051. This example is based on our Frameworks and can be built using the tools included with our CY3663 - EZ-OTG / EZ-Host Development Kit software, available on our website. Please find the design example attached.