src/debugcon.zig


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pub inline fn inb(port: u16) u8 {
    return asm volatile ("inb %[port], %[result]"
        : [result] "={al}" (-> u8),
        : [port] "{dx}" (port),
        : "dx", "al"
    );
}

pub inline fn outb(port: u16, data: u8) void {
    asm volatile ("outb %[data], %[port]"
        :
        : [port] "{dx}" (port),
          [data] "{al}" (data),
        : "dx", "al"
    );
}

pub fn write(data: []const u8) void {
    const len: u8 = @intCast(data.len & 0xFF);
    outb(0xe9, 0x30 + len);
    for (0..len) |i| {
        outb(0xe9, 0x30);
        outb(0xe9, data[i]);
    }
}