WebJul 16, 2004 · Reboots after "OR AL,1 MOV CR0, EAX" on some computers. breath breath at unix.net Fri Jul 16 08:22:53 PDT 2004. Previous message: Reboots after "OR AL,1 MOV CR0, EAX" on some computers. Next message: Apple's contribution to FreeBSD Messages sorted by: Webout #0x64,al: call empty_8042: mov al,#0xDF ! A20 on: out #0x60,al: call empty_8042! make sure any possible coprocessor is properly reset.. xor ax,ax: out #0xf0,al: call delay: ... mov al,#0x20 ! timeout, return default char `space' ret!! Flush the keyboard buffer! flush: mov ah,#0x01: int 0x16: jz empty: xor ah,ah: int 0x16: jmp flush: empty ...
Reboots after "OR AL,1 MOV CR0, EAX" on some computers.
WebApr 20, 2024 · Help needed: Failed to enter protected mode in nested virtualization. I am running Linux VM (4.4.0) in VMWare. And I developed a VMX based hypervisor. It can load real-mode guest code well. Now I changed the guest, to make it enter protected mode from real-mode, but it failed to do that. Here is the guest code, #define SEG_KCODE 1 // kernel … Webin al, 0x64 // see if the keyboard has something available and al, 0x01 jz _kbd_skip // if not, skip to the end in al, 0x60 // read the keyboard scan code print "Got a key: " call convert_num passing it the scan code in al print the scan code _kbd_skip: mov al, 0x20 out 0x20, al // send EOI pop EFLAGS and registers iret happy birthday wishes to a great lady
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WebI have finished the first and second stage of my bootloader but when trying to load the kernel I am getting a triple fault in qemu. here is my main … Web这一位地址很特殊,在CPU启动之后默认总是0. 也就是说,即便CPU给地址总线发送的物理地址是 0x101234 ,第21位地址也会被置成零,从而寻址到 0x1234这个内存单元。 上面对 0x64 和 0x60 这两个 port 的操作,就是使 A20 地址线生效 ,不要总是发个零出去……至于 A20 为什么会被禁用,又为什么是用键盘控制器的 port 启用呢? 这就要从PC诞生之初说起 … WebSep 30, 2024 · If that fails, we try the most traditional approach of sending a write command (0xD1), followed by an A20-enabling command (0xDF) to the keyboard controller. 0x64 represents the controller's command register only for writing, while 0x60 is a data port for both reading and writing. chalice steals meaning