The Allwinner A133 is a 64-bit quad-core ARM Cortex-A53 processor primarily designed for tablets and entry-level smart devices. Its "firmware work" involves a complex interaction between hardware initialization, a multi-stage bootloader process, and the operating system kernel. The Anatomy of Allwinner A133 Firmware
If you are trying to flash, backup, or modify firmware for an A133 device, these are the industry-standard tools: PhoenixSuit / PhoenixCard: The primary tools for flashing firmware files to Allwinner devices via a PC or SD card. allwinner a133 firmware work