34 lines
896 B
Nim
34 lines
896 B
Nim
{.link: "boot.o".}
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{.passL: "-T kernel/arch/i386/linker.ld".}
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import tty, gdt, irq, serial
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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.write("Booting OS\L")
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gdt.gdtInstall()
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serial.write("GDT installed\L")
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terminalInitialize()
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terminalWrite("Hello World!\L")
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terminalWrite("MAX_INT:")
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terminalWrite(high(int))
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terminalWrite("\LMIN_INT:")
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terminalWrite(low(int32)+1)
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for i in 0..22:
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terminalWrite(i)
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terminalWrite('\L')
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