让我们直接对显示器说点什么吧 在上几节中，我们使用的BIOS的中断向量表来进行字符的输出，现在我们直接使用显存对显示器说点什么吧 编写mbr_3.S ;主引导程序;------------------
让我们直接对显示器说点什么吧
在上几节中，我们使用的BIOS的中断向量表来进行字符的输出，现在我们直接使用显存对显示器说点什么吧
编写mbr_3.S
;主引导程序;--------------------------------------------------------------------SECTION MBR vstart=0x7c00 mov ax,cs mov ds,ax mov es,ax mov ss,ax mov fs,ax mov sp,0x7c00 mov ax,0xb800 mov gs,ax;-------------------------------------------------------------------- mov ax,0600h mov bx,0700h mov cx,0 mov dx,184fh int 10h mov byte [gs:0x00],'1' mov byte [gs:0x01],0xA4 mov byte [gs:0x02],' ' mov byte [gs:0x03],0xA4 mov byte [gs:0x04],'M' mov byte [gs:0x05],0xA4 mov byte [gs:0x06],'B' mov byte [gs:0x07],0xA4 mov byte [gs:0x08],'R' mov byte [gs:0x09],0xA4 jmp $ times 510-($-$$) db 0 db 0x55,0xaa[root@makeOS software]# nasm -o mbr.bin mbr_3.S[root@makeOS software]# dd if=./mbr.bin /> of=bochs/hd60M.img /> bs=512 count=1 conv=notrunc1+0 records in1+0 records out512 bytes (512 B) copied, 0.0317031 s, 16.1 kB/s[root@makeOS bochs]# bin/bochs -f bochsrc.disk ======================================================================== Bochs x86 Emulator 2.6.2 Built from SVN snapshot on May 26, 2013 Compiled on May 25 2017 at 21:59:04========================================================================00000000000i[ ] reading configuration from bochsrc.disk------------------------------Bochs Configuration: Main Menu------------------------------This is the Bochs Configuration Interface, where you can describe themachine that you want to simulate. Bochs has already searched for aconfiguration file (typically called bochsrc.txt) and loaded it if itcould be found. When you are satisfied with the configuration, goahead and start the simulation.You can also start bochs with the -q option to skip these menus.1. Restore factory default configuration2. Read options from...3. Edit options4. Save options to...5. Restore the Bochs state from...6. Begin simulation7. Quit nowPlease choose one: [6] 这里我们启动之后，就能看到在屏幕的左上角有1MBR闪烁的样子
