Loongson BIOS Initialization and VGA BIOS Emulator Based on PMON
Liu Jin-gang · Jisuanji gongcheng · 2009
This paper elaborates the initial flow of Loongson Basic Input-Output System(BIOS) based on PMON and Video Graphics Array(VGA) BIOS emulator to emulate the initial x86 binaries in ROM of ATI VGA Card. The critical issues such as the initial process of PCI devices, VGA BIOS emulator, and the distribution of North Bridge’s address ranges are discussed. After debugging and extensive tests, expanded Loongson 2E BIOS has run reliably in mainbords for Loongson 2E, and can steadily load Debian kernel ported for Loongson 2E.