first commit

LICENSE

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+MAINCLUB OPEN SOFTWARE LICENSE (MCOSL)
+Version 1.0
+Copyright (c) 2026 MainClub
+All Rights Reserved
+1. Purpose
+The MainClub Open Software License (MCOSL) ensures that the Licensed Work remains publicly accessible in source code form and may be freely used, studied, modified, and shared on a strictly non-commercial basis.
+This License does not qualify as an Open Source license under definitions published by the Open Source Initiative.
+2. Definitions
+2.1 "Licensed Work" means any software, source code, documentation, or related materials distributed under this License.
+2.2 "Derivative Work" means any modification, adaptation, translation, fork, or other work based on the Licensed Work.
+2.3 "Distribution" means making the Licensed Work or a Derivative Work available to third parties by any means.
+2.4 "Commercial Activity" means any sale, licensing for a fee, paid access, monetized hosting, paid subscription, or other activity intended for commercial advantage or monetary compensation.
+3. Grant of Rights
+Subject to compliance with this License, each recipient is granted a worldwide, royalty-free, non-exclusive license to:
+a) Use the Licensed Work for any purpose;
+b) Study and modify the Licensed Work;
+c) Create Derivative Works;
+d) Distribute the Licensed Work or Derivative Works on a strictly non-commercial basis.
+4. Copyleft Requirement
+4.1 Any Distribution of the Licensed Work or a Derivative Work must be made under this same License.
+4.2 Complete corresponding source code must be provided free of charge.
+4.3 No additional legal, contractual, or technical restrictions may be imposed.
+4.4 Derivative Works may not be relicensed under any other license.
+5. Non-Commercial Restriction
+5.1 The Licensed Work and any Derivative Work may not be used for Commercial Activity.
+5.2 It is prohibited to:
+a) Sell the Licensed Work;
+b) Sell a Derivative Work;
+c) Charge for access or downloads;
+d) Include the Licensed Work in any paid product or service;
+e) Provide paid hosting or subscription-based access.
+5.3 These restrictions apply equally to all parties, including MainClub.
+6. Attribution and Branding
+6.1 All copyright notices must be preserved.
+6.2 Modifications must be clearly documented.
+6.3 The name "MainClub" and related branding may not be used to endorse or promote Derivative Works without prior written permission.
+7. No Warranty
+THE LICENSED WORK IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND.
+8. Limitation of Liability
+IN NO EVENT SHALL ANY COPYRIGHT HOLDER BE LIABLE FOR DAMAGES ARISING FROM THE USE OR DISTRIBUTION OF THE LICENSED WORK.
+9. Termination
+Any violation of this License automatically terminates the rights granted herein.

Makefile

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+CC = x86_64-elf-gcc
+LD = x86_64-elf-ld
+
+CFLAGS = -ffreestanding -O2 -Wall -Wextra
+LDFLAGS = -T linker.ld -nostdlib
+
+OBJS = \
+    sys/arch/x86_64/boot.o \
+    sys/kern/main.o
+
+all: kernel.bin
+
+kernel.bin: $(OBJS)
+	$(LD) $(LDFLAGS) -o kernel.bin $(OBJS)
+
+sys/arch/x86_64/boot.o:
+	$(CC) $(CFLAGS) -c sys/arch/x86_64/boot.s -o sys/arch/x86_64/boot.o
+
+sys/kern/main.o:
+	$(CC) $(CFLAGS) -c sys/kern/main.c -o sys/kern/main.o
+
+clean:
+	rm -f $(OBJS) kernel.bin

README.md

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+# LiteOS
+
+Unix like OS created Hjin-BF 

linker.ld

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+ENTRY(_start)
+
+SECTIONS
+{
+    . = 1M;
+
+    .text :
+    {
+        *(.multiboot)
+        *(.text*)
+    }
+
+    .rodata :
+    {
+        *(.rodata*)
+    }
+
+    .data :
+    {
+        *(.data*)
+    }
+
+    .bss :
+    {
+        *(.bss*)
+    }
+}

sys/arch/x86_64/boot.s

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+.section .multiboot
+.align 4
+.long 0x1BADB002
+.long 0x0
+.long -(0x1BADB002)
+
+.section .text
+.global _start
+.type _start, @function
+
+_start:
+    cli
+    call kernel_main
+
+.hang:
+    hlt
+    jmp .hang

sys/arch/x86_64/bootloader.asm

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+[org 0x7C00]
+bits 16
+
+KERNEL_OFFSET equ 0x1000
+
+start:
+    cli
+    mov [BOOT_DRIVE], dl
+
+    xor ax, ax
+    mov ds, ax
+    mov es, ax
+    mov ss, ax
+    mov sp, 0x7C00
+    sti
+
+    call load_kernel
+
+    jmp KERNEL_OFFSET
+
+; -----------------------
+; Зчитування kernel
+; -----------------------
+
+load_kernel:
+    mov bx, KERNEL_OFFSET   ; куди завантажити
+    mov dh, 5               ; кількість секторів (тимчасово 5)
+
+    mov dl, [BOOT_DRIVE]
+    mov ah, 0x02            ; BIOS read sector
+    mov al, dh              ; скільки секторів
+    mov ch, 0x00            ; cylinder
+    mov dh, 0x00            ; head
+    mov cl, 0x02            ; сектор 2 (після bootloader)
+    int 0x13
+
+    jc disk_error
+    ret
+
+disk_error:
+    mov si, error_msg
+.print:
+    lodsb
+    cmp al, 0
+    je $
+    mov ah, 0x0E
+    int 0x10
+    jmp .print
+
+BOOT_DRIVE db 0
+error_msg db "Disk read error!", 0
+
+times 510 - ($ - $$) db 0
+dw 0xAA55

sys/arch/x86_64/kernel.asm

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+[org 0x1000]
+bits 16
+
+start:
+    mov si, message
+
+.print:
+    lodsb
+    cmp al, 0
+    je .hang
+    mov ah, 0x0E
+    int 0x10
+    jmp .print
+
+.hang:
+    hlt
+    jmp .hang
+
+message db "Kernel loaded successfully!", 0

sys/kern/main.c

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+#include <stddef.h>
+
+void kernel_main(void) {
+    volatile char *video = (volatile char*) 0xB8000;
+
+    const char *msg = "LiteOS kernel started";
+
+    for (size_t i = 0; msg[i] != '\0'; i++) {
+        video[i * 2] = msg[i];
+        video[i * 2 + 1] = 0x07; // світло-сірий текст
+    }
+
+    while (1) {
+        __asm__("hlt");
+    }
+}