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NeonLightions wrote:Yes, I have enabled cursor using port 0x3D4 and 0x3D5

NeonLightions wrote:I think the bootloader is working correctly. It isn't use any linear framebuffer.

Octocontrabass wrote:

NeonLightions wrote:Yes, I have enabled cursor using port 0x3D4 and 0x3D5

What values did you write to those ports?

Here is my code:

Code: Select all

void enable_cursor(uint8_t size)
{
    uint8_t start_line = 16 - size;
	outb(0x3D4, 0x0A);
	outb(0x3D5, (inb(0x3D5) & 0xC0) | start_line);
 
	outb(0x3D4, 0x0B);
	outb(0x3D5, (inb(0x3D5) & 0xE0) | 15);
}

void update_cursor(int x, int y)
{
	uint16_t pos = y * 80 + x;
 
	outb(0x3D4, 0x0F);
	outb(0x3D5, (uint8_t) (pos & 0xFF));
	outb(0x3D4, 0x0E);
	outb(0x3D5, (uint8_t) ((pos >> 8) & 0xFF));
}

void move_cursor(void) {
    const size_t idx = y_pos * 80 + x_pos;
    outb(0x3D4, 0x0F);
    outb(0x3D5, (uint8_t) (idx & 0xFF));
    outb(0x3D4, 0x0E);
    outb(0x3D5, (uint8_t) ((idx >> 8) & 0xFF));
}

NeonLightions wrote:I think the bootloader is working correctly. It isn't use any linear framebuffer.

Which bootloader are you using?

NeonLightions wrote:Here is my code:

NeonLightions wrote:I'm using GRUB. Is there any linear framebuffer?

NeonLightions wrote:If there is linear framebuffer, can you show me how to enable text cursor in it?

Octocontrabass wrote:How did you configure GRUB and your multiboot header? If you told it you want a linear framebuffer, it will give you a linear framebuffer.

Octocontrabass wrote:How are you calling enable_cursor? Are you sure outb works?

Octocontrabass wrote:Are you using BIOS/CSM or UEFI? GRUB with UEFI will always set up a linear framebuffer.

Octocontrabass wrote:How did you configure GRUB and your multiboot header? If you told it you want a linear framebuffer, it will give you a linear framebuffer.

Octocontrabass wrote:There's no such thing as a text cursor in a linear framebuffer.

klange wrote:It would be helpful to see the rest of your source tree, if you can provide it.

[MyOS]
|__ [scripts]
|    |__ .gitignore
|    |__ grub.cfg
|    |__ linker.ld
|__ [src]
|    |__ [boot]
|    |    |__ header.s
|    |    |__ main.s
|    |    |__ main64.s
|    |__ [common]
|    |    |__ printf.c
|    |    |__ printf.h
|    |    |__ types.h
|    |__ [display]
|    |    |__ vga.c
|    |    |__ vga.h
|    |    |__ terminal.h
|    |    |__ terminal.c
|    |__ [device]
|    |    |__ port.c
|    |    |__ port.h
|    |__ [interrupts]
|    |    |__ idt.c
|    |    |__ idt.h
|    |    |__ load_idt.s
|    |    |__ isr.c
|    |    |__ isr.h
|    |__ [memory]
|    |    |__ gdt.c
|    |    |__ gdt.h
|    |    |__ load_gdt.s
|    |__ main.c
|__ Makefile

klange wrote:I think an important question that hasn't been asked yet is have you outputted any text yet?