40 lines
1.2 KiB
Nim
40 lines
1.2 KiB
Nim
{.link: "../boot.o".}
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{.passL: "-ffreestanding -target i386 -nostdlib -T arch/i386/linker.ld".}
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{.passC: "-ffreestanding -nostdlib --target=i386-pc-none-elf -march=i386".}
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import tty, gdt, interrupts, serial
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const version {.strdefine.} = "UNKNOWN"
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type
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MemoryPointer{.unchecked.} = ptr array[0, char]
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proc memcpy*(dest: ByteAddress, src: ByteAddress, count: int){.exportc.} =
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var destMem = cast[MemoryPointer](dest)
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var srcMem = cast[MemoryPointer](src)
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for i in 0..count-1:
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destMem[i] = srcMem[i]
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proc memset*(dest: ByteAddress, value: char, count: int){.exportc.} =
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var destMem = cast[MemoryPointer](dest)
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for i in 0..count-1:
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destMem[i] = value
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proc kernelMain() {.exportc: "kernel_main"}=
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serial.init()
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serial.writeLine("Version:" & (version))
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serial.writeLine("Booting OS")
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gdt.gdtInstall()
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serial.writeLine("GDT installed")
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interrupts.idtInstall()
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serial.writeLine("IDT installed")
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tty.initialize()
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tty.writeLine("Version:" & version)
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tty.writeLine("Hello World!")
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tty.write("MAX_INT:")
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tty.writeLine(high(int))
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tty.write("LMIN_INT:")
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tty.writeLine((low(int)+1))
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tty.write("MAX_UINT:")
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tty.writeLine(high(uint32))
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asm """int $0x3""" |