This document includes the following (11 pages, the back is a code): 1) ADS1.2 key settings and a brief explanation 2) startup code start.s implementation process 3) Main and the main difference 4) NAND FLASH District 5) SDRAM partition 6) code from the NAND FLASH to SDRAM copy process 7) K9F1208 operation Description 8) Main execution flow 9) How to run the operating system personal understanding 10) 4K code before the code starts the problem 11) RO, RW , ZI section have the BIOS implementation of the flow chart attached!

GEC2440_BIOS.pdf

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