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* [mubios] Transfer control from the BIOS to the MBR, which has been loaded at ↵Richard Qin3 days1-0/+18
| | | | | | 0x7C00. Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Have IRQ0 maintain the BIOS clock, and implement INT 1Ah AH=00h.Richard Qin3 days2-0/+79
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Enable IRQ0Richard Qin3 days2-3/+8
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Transition from protected mode back to real modeRichard Qin3 days1-0/+74
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Create 16-bit entry points for IRQ0/IRQ1 and install the IVT vectors.Richard Qin3 days1-0/+51
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Fix the link order for the 16-bit entriesRichard Qin3 days2-2/+2
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Building a 32-bit C entry in protected modeRichard Qin3 days1-0/+4
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Implement the switch from 16-bit to 32-bit protected modeRichard Qin3 days2-0/+112
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Write mubios reset entry pointRichard Qin3 days1-0/+61
Signed-off-by: Richard Qin <richard.qin.x@gmail.com>