happy os kernel 32 bit

[BITS 32]
[ORG 0x7C00]  ; BIOS loads bootloader at 0x7C00

section .text
start:
    cli              ; Disable interrupts
    xor ax, ax
    mov ds, ax
    mov es, ax
    mov ss, ax
    mov sp, 0x7C00  ; Set stack pointer

    call load_gdt    ; Load GDT for 32-bit mode
    call switch_pm   ; Enter 32-bit mode directly
    jmp $           ; Halt (should never reach here)

; Load Global Descriptor Table (GDT)
load_gdt:
    lgdt [gdt_desc]  ; Load GDT
    ret

; Switch to 32-bit mode
switch_pm:
    mov eax, cr0
    or eax, 1        ; Set PE bit
    mov cr0, eax
    jmp CODE_SEG:init_pm  ; Far jump to flush pipeline

[BITS 32]
init_pm:
    mov ax, DATA_SEG
    mov ds, ax
    mov es, ax
    mov fs, ax
    mov gs, ax
    mov ss, ax

    call clear_screen_pm
    call print_welcome_pm
    call main_loop_pm

; Main loop for 32-bit mode commands
main_loop_pm:
    call read_command_pm
    call process_command_pm
    jmp main_loop_pm

; Process 32-bit mode commands
process_command_pm:
    mov si, buffer
    mov di, cmd_install
    call strcmp
    jz install_os

    mov si, buffer
    mov di, cmd_memory
    call strcmp
    jz show_memory

    mov si, buffer
    mov di, cmd_graphics
    call strcmp
    jz enter_graphics_mode

    mov si, buffer
    mov di, cmd_mouse
    call strcmp
    jz enable_mouse

    mov si, buffer
    mov di, cmd_tasks
    call strcmp
    jz show_tasks

    mov si, buffer
    mov di, cmd_cls
    call strcmp
    jz clear_screen_pm

    mov si, buffer
    mov di, cmd_dir
    call strcmp
    jz show_directory

    mov si, buffer
    mov di, cmd_unpack
    call strcmp
    jz unpack_package

    mov si, buffer
    mov di, cmd_multitask
    call strcmp
    jz enable_multitasking

    mov si, buffer
    mov di, cmd_usb
    call strcmp
    jz enable_usb

    ret

; Enable USB support
enable_usb:
    mov esi, usb_msg
    call print_string_pm
    ret

; Enable multitasking
enable_multitasking:
    mov esi, multitask_msg
    call print_string_pm
    ret

; OS Installation Command
install_os:
    mov si, install_prompt
    call print_string_pm
    call read_command_pm

    mov si, buffer
    mov di, cmd_dualboot
    call strcmp
    jz setup_dualboot

    mov si, buffer
    mov di, cmd_format
    call strcmp
    jz format_drive

    ret

; Dual Boot Setup
setup_dualboot:
    mov si, dualboot_prompt
    call print_string_pm
    call read_command_pm
    ret

; Format Drive
format_drive:
    mov si, format_prompt
    call print_string_pm
    ret

; Show directory structure
show_directory:
    mov si, dir_prompt
    call print_string_pm
    ret

; Unpack pre-built package
unpack_package:
    mov si, unpack_msg
    call print_string_pm
    mov si, unpacked_file_msg
    call print_string_pm
    ret

; Show available memory
show_memory:
    mov esi, memory_msg
    call print_string_pm
    ret

; Enter simple graphics mode (placeholder)
enter_graphics_mode:
    mov esi, graphics_msg
    call print_string_pm
    ret

; Enable basic mouse support (USB based)
enable_mouse:
    mov esi, mouse_msg
    call print_string_pm
    ret

; Show running tasks (multitasking enabled)
show_tasks:
    mov esi, tasks_msg
    call print_string_pm
    ret

; Clear screen in 32-bit mode
clear_screen_pm:
    mov edi, 0xB8000  ; Video memory
    mov eax, 0x07200720  ; Space character with color
    mov ecx, 2000     ; Clear 80x25 screen
    rep stosd
    ret

; Print string in 32-bit mode
print_string_pm:
    mov edi, 0xB8000  ; Video memory
.loop:
    lodsb
    test al, al
    jz .done
    mov ah, 0x07
    stosw
    jmp .loop
.done:
    ret

; Read command in 32-bit mode
read_command_pm:
    in al, 0x60       ; Read key input
    call print_char_pm
    ret

; Print character in 32-bit mode
print_char_pm:
    mov ah, 0x07      ; Attribute byte
    mov edi, 0xB8000  ; Video memory
    add edi, [cursor_pos]
    stosw             ; Store character at position
    add dword [cursor_pos], 2 ; Move cursor
    ret

; GDT Setup
gdt:
    dq 0x0000000000000000  ; Null Descriptor
    dq 0x00CF9A000000FFFF  ; Code Segment Descriptor
    dq 0x00CF92000000FFFF  ; Data Segment Descriptor

gdt_desc:
    dw gdt_desc - gdt - 1
    dd gdt

CODE_SEG equ 0x08
DATA_SEG equ 0x10

; Data section
data:
welcome_msg_32 db 'Welcome to Happy OS (32-bit Mode)', 0
memory_msg db 'Total Memory: 1MB (Placeholder)', 0
graphics_msg db 'Entering Graphics Mode (Placeholder)', 0
mouse_msg db 'USB Mouse Enabled', 0
tasks_msg db 'Multitasking Active', 0
usb_msg db 'USB Support Enabled', 0
multitask_msg db 'Multitasking Enabled', 0
cmd_memory db 'memory', 0
cmd_graphics db 'graphics', 0
cmd_mouse db 'mouse', 0
cmd_tasks db 'tasks', 0
cmd_cls db 'cls', 0
cmd_dir db 'dir', 0
cmd_install db '/install', 0
cmd_dualboot db 'dualboot', 0
cmd_format db 'format', 0
cmd_unpack db '/unpack', 0
cmd_multitask db 'multitask', 0
cmd_usb db 'usb', 0
install_prompt db 'Choose installation mode: dualboot/format', 0
dualboot_prompt db 'Enter partition size (MB):', 0
format_prompt db 'Formatting drive... Complete!', 0
dir_prompt db 'Showing files: (Placeholder)', 0
unpack_msg db 'Unpacking package... Complete!', 0
unpacked_file_msg db 'You unpacked me!', 0
buffer times 64 db 0

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

the install and stuff don't really work but its a start