aurora-os/bootloader_kernel.asm at master · QuirkyCodex/aurora-os · GitHub

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; Combined Aurora Bootloader + Kernel
; Simple all-in-one approach for testing

org 0x7C00
bits 16

start:
    ; Set video mode to 80x25 text
    mov ax, 3
    int 0x10

    ; Clear screen with Aurora colors
    mov ax, 0x0600  ; AH=06 (scroll), AL=00 (clear)
    mov bh, 0x1F    ; Blue background, white foreground
    mov cx, 0x0000  ; From (0,0)
    mov dx, 0x184F  ; To (24,79)
    int 0x10

    ; Position cursor at top-left
    mov ah, 0x02    ; Set cursor position
    mov bh, 0       ; Page number
    mov dh, 0       ; Row
    mov dl, 0       ; Column
    int 0x10

    ; Print Aurora banner
    mov si, banner
    call print_string

    ; Wait a moment
    mov cx, 0xFFFF
.delay:
    nop
    loop .delay

    ; Clear screen for kernel
    mov ax, 0x0600
    mov bh, 0x1F
    mov cx, 0x0000
    mov dx, 0x184F
    int 0x10

    ; Print kernel running message
    mov si, kernel_msg
    call print_string

    ; Simple kernel shell-like interface
    mov si, prompt
    call print_string

.kernel_loop:
    ; Wait for key press
    mov ah, 0x00
    int 0x16

    ; Echo character
    mov ah, 0x0E
    int 0x10

    ; Handle commands
    cmp al, 'q'
    je .reboot
    cmp al, 'p'
    je .print_stats
    cmp al, 's'
    je .shell_demo

    ; Continue loop
    jmp .kernel_loop

.reboot:
    int 0x19

.print_stats:
    mov si, stats_msg
    call print_string
    jmp .kernel_loop

.shell_demo:
    mov si, shell_msg
    call print_string
    mov si, prompt
    call print_string
    jmp .kernel_loop

print_string:
    pusha
.print_loop:
    lodsb
    cmp al, 0
    je .done
    mov ah, 0x0E
    mov bh, 0
    int 0x10
    jmp .print_loop
.done:
    popa
    ret

banner:
    db "🌠 Aurora OS v0.2.0", 0x0D, 0x0A
    db "=================", 0x0D, 0x0A, 0x0A
    db "Transitioning to kernel mode...", 0x0D, 0x0A, 0x0A, 0

kernel_msg:
    db "Kernel: Ready", 0x0D, 0x0A
    db "RAM: Basic", 0x0D, 0x0A
    db "VGA: Text Mode", 0x0D, 0x0A
    db "Shell: Aurora Built-in", 0x0D, 0x0A, 0x0A
    db "Commands: [p]rint stats, [s]hell demo, [q]uit", 0x0D, 0x0A, 0x0A, 0

prompt:
    db "aurora> ", 0

stats_msg:
    db 0x0D, 0x0A, "System Statistics:", 0x0D, 0x0A
    db "• Kernel: Aurora v0.2.0", 0x0D, 0x0A
    db "• Platform: x86 Real Mode", 0x0D, 0x0A
    db "• Memory: Basic Management", 0x0D, 0x0A
    db "• Interface: Text Console", 0x0D, 0x0A, 0

shell_msg:
    db 0x0D, 0x0A, "[Shell demo activated]", 0x0D, 0x0A
    db "Welcome to Aurora OS! This is a simple shell interface.", 0x0D, 0x0A
    db "Try typing commands like 'help', 'version', or press 'q' to quit.", 0x0D, 0x0A, 0

; Boot sector signature
times 510 - ($ - $$) db 0
dw 0xAA55