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A6500-UM通用测量卡
按ENTER键打开系统控制器子菜单，其中VMEbus系统资源被配置。
VME字节交换此字段用于配置VMEbus主和从字节交换选项。这个选项包括字节交换全部（默认）、字节交换从属、字节交换主和禁用。
主界面按ENTER键打开主界面子菜单，其中VMEbus主界面接口已配置。
从属接口这是标题，不是字段。从机1和2运行模式
此字段允许配置VMEbus从设备1和2。选项包括可编程（默认）且兼容。选择可编程允许您：配置和启用VMEbus从站1和2，就像从站3、4、5、6、7和8一样。选择兼容时，BIOS会自动配置并启用VMEbus
从设备1和2。兼容设置XVME-660从设备接口，以便与未使用的旧Xycom Automation VME PC处理器板兼容宇宙芯片。
sla这些字段确定的前12位的基本VMEbus地址前缀
VMEbus从接口将响应的地址。这三个字段是这12位的高（H）、中（M）和低（L）半字节。地址为HML00000h。在默认屏幕配置中，H为A，M为A，L为4，因此地址为AA400000h。
这些值根据大小和地址空间字段值而变化。当地址空间值为VMEbus标准，必须定位双访问存储器
在1 MB边界上，上两个半字节被忽略，因此高和中半字节变为0，并变为只读。当地址空间值为VMEbus扩展时，从属地址必须是从属内存大小的倍数。当大小大于1 MB时，低半字节被截断为偶数。
注意：使用这些字段设置的地址是VMEbus处理器。XVME-660上的PC/AT处理器将看到翻译的
住址此转换（以及转换量）由BIOS和计算在BIOS设置中不可由用户配置。关于翻译的讨论见第67页地址。进行应保存的更改后，始终选择退出或保存更改或保存更改。这两个过程都将更改存储在电池支持的CMOS RAM中。
下次启动计算机时，BIOS将根据设置选择存储在CMOS中。如果这些值导致系统引导失败，重新启动并进入BIOS设置。在BIOS设置中，您可以加载默认值（加载设置默认值）或尝试更改导致启动失败的选择。
Press ENTER to open the System Controller submenu, where VMEbus system resources
are configured.
VME Byte Swaps This field is used to configure VMEbus Master and Slave byte-swapping options. The
choices are Byte Swap All (default), Byte Swap Slave, Byte Swap Master, and Disabled.
Master Interface Press ENTER to open the Master Interface submenu, where the VMEbus master
interface is configured.
Slave Interface This is a heading, not a field.
Slave 1 & 2 Operational
Mode
This field allows configuration of VMEbus Slaves 1 and 2. The choices are
Programmable (default) and Compatible. Selecting Programmable allows you to
configure and enable VMEbus slaves 1 and 2 just like slaves 3, 4, 5, 6, 7, and 8.
When Compatible is selected, the BIOS automatically configures and enables VMEbus
slaves 1 and 2. Compatible sets up the XVME-660 slave interface so that it is
compatible with older Xycom Automation VME PC processor boards which did not use
the Universe chip. SlaThese fields determine the base VMEbus address prefix for the first 12 bits of the
address to which the VMEbus slave interface will respond. The three fields are the
high (H), middle (M), and low (L) nibbles of these 12 bits. The address is HML00000h.
In the default screen configuration H is A, M is A, and L is 4, so the address is
AA400000h.
The values change depending on the Size and Address Space field values. When the
Address Space value is VMEbus Standard, the dual-access memory must be located
on a 1 MB boundary and the upper two nibbles are ignored, so the high and medium
nibbles are changed to 0 and are made read-only. When the Address Space value is
VMEbus Extended, the slave address must be a multiple of the slave memory size.
When the Size is greater than 1 MB, the low nibble is truncated to an even value.
Note: The address that is set with these fields is the address that is used by the
VMEbus processors. The PC/AT processor on the XVME-660 will see a translated
address. This translation (and the amount of translation) is calculated by the BIOS and
is not user-configurable in the BIOS setup. See p. 67 for a discussion of translation
addresses. After making changes that should be saved, always select either Exit Saving Changes
or Save Changes. Both procedures store the changes in battery-backed CMOS RAM.
The next time you boot your computer, the BIOS configures your system according to
the setup selections stored in CMOS. If those values cause the system boot to fail,
reboot and enter the BIOS setup. In the BIOS setup, you can load the default values
(Load Setup Defaults) or try to change the selections that caused the boot to fail.
