bios

在使用VMware打算在机器中安装新的虚拟机时，出现“此主机支持 Intel VT-x，但 Intel VT-x 处于禁用状态”错误如下： 提示信息： 已将该虚拟机配置为使用 64 位客户机操作系统。但是，无法执行 64 位操作。 此主机支持 Intel VT-x，但 Intel VT-x 处于禁用状态。 如果已在 BIOS/固件设置中禁用 Intel VT-x，或主机自更改此设置后从未重新启动，则 Intel VT-x 可能被禁用。 (1) 确认 BIOS/固件设置中启用了 Intel VT-x 并禁用了“可信执行”。 (2) 如果这两项 BIOS/固件设置有一项已更改，请重新启动主机。 (3) 如果您在安装 VMware Workstation 之后从未重新启动主机，请重新启动。 (4) 将主机的 BIOS/固件更新至最新版本。 有关更多详细信息，请参见 http://vmware.com/info?id=152 。 解决方法 看上面的提示 也就很好解决了：直接修改BIOS设置即可 以下以个人thinkpad T460P电脑为例： 1、关机，开机，在启动时，按F1今天 BIOS 设置页面； 2、选择 Security，再选择Virtual ization并点击enter建进入该功能，在新功能中选择Intel (R) Virtualization Technology

I want to copy my boot loader to first sector(512) of hard disk within itself (I should use bios interrupt 13h) and I found this code: mov bx, buffer1 ; set BX to the address (not the value) of BlahBlah mov ah,03h ;When ah=, int13 reads a disk sector mov al,5 ;Al is how many sectors to read mov cl,0 ;Sector Id mov dh,0 ;Head mov dl,80h ;Drive (0 is floppy) mov cx,512 ;One sector /2 mov ah, 0x3 ; set function 2h int 0x13 bu it does not work! Daniel Kamil Kozar Your code is very messy. In order to properly use int 13h with AH = 3 , you need to also set ES (the segment in which BX resides, e.g.

The following site "Writing Boot Sector Code" provides a sample of code that prints 'A' to the screen when the system boots. From what I have been reading don't you have to use INT opcode to get BIOS to do certain things? How does the code below, from the site referenced above work without using interrupts? What portion of code actually tells the hardware to print 'A' to the screen? Code in question: .code16 .section .text .globl _start _start: mov $0xb800, %ax mov %ax, %ds movb $'A', 0 movb $0x1e, 1 idle: jmp idle APPENDING TO ORIGINAL QUESTION If I use the following code does the BIOS call

I know that, on booting, BIOS loads the first sector (512 bytes) of a pre-defined device drive on memory 0x7c00 and then jump to that address. So, memory from 0x7c00 to 0x7dff is occupied. Is there any other section of RAM that is occupied? If I'm programming an Operating System, could I use all the RAM except 0x7c00 to ox7dff for my own purposes?, or, is there any other section filled with "precious" information at boot time that I must not overwrite? I know that at a given moment, I can overwrite MBR loaded on memory (chainloading), my question is focused on... what part of the memory is

BiosCharacteristics --由系统管理BIOS参考规范中定义的BIOS的特征阵列所支持的系统。 BIOSVersion --完整的系统BIOS信息阵列。在许多计算机可以有存储在注册表中，表示系统BIOS信息的几个版本字符串。 BuildNumber --内部标识此编译这个软件元素。 Caption --简短的描述 CodeSet --使用这个软件元素代码集。 CurrentLanguage --当前BIOS的语言的名称 Description --描述 EmbeddedControllerMajorVersion --嵌入式控制器固件的主要版本。 EmbeddedControllerMinorVersion --嵌入式控制器固件的次要版本。 IdentificationCode --制造商的标识符这个软件元素 InstallableLanguages --可用于在此系统上安装的语言数量 InstallDate --安装日期 LanguageEdition --这个软件元素的语言版本 ListOfLanguages --可用BIOS安装的语言名称的数组 Manufacturer --制造商名称 Name --BIOS名称 OtherTargetOS --记录的制造商，操作系统类型时TargetOperatingSystem属性具有1（其他）的值的软件元件

Let's say I would like to change a setting in the BIOS of my computer in Linux (let's say Ubuntu 11 if it matters.) What types of APIs exist to allow you query and manipulate BIOS setting? Further, what are good resources for doing this type of development? The CMOS memory exists outside of the normal address space and cannot contain directly executable code. It is reachable through IN and OUT commands at port number 70h (112d) and 71h (113d). To read a CMOS byte, an OUT to port 70h is executed with the address of the byte to be read and an IN from port 71h will then retrieve the requested

I understand modern computers have modified Harvard architectures. Can the fact that they can read instructions from somewhere other than where they hold data allow them to fetch instructions directly from ROM chips? Do they load the BIOS to RAM first, or do they execute it directly from the chip? I don't have a computer I can open nearby, so... If I remove ALL the RAM from the memory slots, will the computer be able to start the full BIOS, run the POST stuff and tell me I need RAM? It's funny I've never tried it... EDIT: my intention with this question is to learn whether commercial CPUs (or