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* [mubios] Fixed BDA Offset and IRQ1 Save OrderHEADmasterRichard Qin29 hours1-4/+11
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Store and Restore DS in irq0_entryRichard Qin29 hours1-0/+2
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Implement INT 16h Keyboard ServiceRichard Qin30 hours2-0/+30
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Implement INT 15h E820hRichard Qin30 hours1-0/+1
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Extend registers from 16-bit to 32-bitRichard Qin30 hours1-23/+7
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Add switching and return paths between real-mode interrupts and ↵Richard Qin30 hours2-283/+166
| | | | | | protected-mode C services. Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Implement INT 13h AH=42hRichard Qin31 hours1-1/+148
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Implement INT 13h AH=41hRichard Qin31 hours1-0/+36
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Implement a minimal INT 10h AH=0EhRichard Qin31 hours1-0/+92
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Transfer control from the BIOS to the MBR, which has been loaded at ↵Richard Qin31 hours1-0/+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 Qin31 hours2-0/+79
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Enable IRQ0Richard Qin32 hours2-3/+8
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Transition from protected mode back to real modeRichard Qin33 hours1-0/+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 Qin33 hours1-0/+51
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Fix the link order for the 16-bit entriesRichard Qin33 hours2-2/+2
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Building a 32-bit C entry in protected modeRichard Qin36 hours1-0/+4
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Implement the switch from 16-bit to 32-bit protected modeRichard Qin36 hours2-0/+112
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Write mubios reset entry pointRichard Qin37 hours1-0/+61
Signed-off-by: Richard Qin <richard.qin.x@gmail.com>