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DATX100工控卡件
IDE控制器支持增强的PIO模式，这减少了向硬盘传输16位数据的周期时间。与您的驱动器手册，查看您使用的驱动器是否支持这些模式。这个PIO模式越高，循环时间越短。作为IDE电缆长度循环时间的减少会导致不稳定的操作。因此，保持IDE电缆尽可能短符合您的最佳利益。
可以在BIOS设置中选择PIO模式（参见第36页）。如果驱动器：支持自动ID命令。如果遇到问题，请更改将模式转换为标准模式。XVME-660有一个144针小外形双列直插内存模块（SODIMM）插入内存的站点。
XVME-660支持32、64、128和256 MB PC100 SDRAM。你可以使用4Mx64、8Mx64，16Mx64和32Mx64 SDRAM SODIMM大小。表A-1列出了SODIMM配置。按照以下步骤安装SODIMM：
1.遵循标准的防静电程序，以将损坏XVME-660及其部件。
2.关闭XVME-660的电源，将其从VME背板上卸下，并将其放在保险柜上防静电（接地）表面。
3.如果尚未拆下，则拆下所有接头。
4.卸下子板，轻轻地将其向后拉，以便IP、SCSI和PMC（如果有）连接器从前面板中拔出。把女儿板在旁边。
更换XVME-660模块，重新连接所有连接器等。
5.将主板上的P5连接器定位在P1和P2 VME背板连接器（另见第11页的图纸）。
6.拉动SODIMM两侧的金属卡子，直到它以一定角度弹出（水平方向约30）。
7.抓住SODIMM的上两个角或边缘，轻轻地将其从插座并将其设置到侧面。
8.插入新的SODIMM，直到它紧贴连接器。
9.轻轻向下推SODIMM，直到金属卡子卡入到位，将其固定。如果你无法轻轻将SODIMM推到位，可能需要重新执行步骤8。
10.更换子板。
12.接通设备电源，确保内存被识别（启动期间可在BIOS中打开的启动时间诊断屏幕，请参阅第41页）。本附录包含XVME-660的电路板装配图（俯视图）。图B-1是XVME-660/71x和XVME-660/31x模块的装配图。图B-2是XVME-660子板的装配图。
The IDE controller supports enhanced PIO modes, which reduce the cycle times for 16-bit data transfers to the hard drive. Check with your
drive manual to see if the drive you are using supports these modes. The
higher the PIO mode, the shorter the cycle time. As the IDE cable length
increases, this reduced cycle time can lead to erratic operation. As a result, it is in your best interest to keep the IDE cable as short as possible.
The PIO modes can be selected in the BIOS setup (see p. 36). The Autoconfiguration will attempt to classify the connected drive if the drive
supports the auto ID command. If you experience problems, change the
Transfer Mode to Standard. The XVME-660 has one 144-pin small-outline dual inline memory module (SODIMM)
site in which memory is inserted.
The XVME-660 supports 32, 64, 128, and 256 MB of PC100 SDRAM. You can use
4Mx64, 8Mx64, 16Mx64, and 32Mx64 SDRAM SODIMM sizes. Table A-1 lists the
SODIMM configurations. Follow these steps to install the SODIMM:
1. Follow standard antistatic procedures to minimize the chance of damaging the
XVME-660 and its components.
2. Power off the XVME-660, remove it from the VME backplane, and place it on a safe
antistatic (grounded) surface.
3. Remove all connectors if not already removed.
4. Remove the daughterboard gently pulling it up at the back and backward so that the
IP, SCSI, and PMC (if any) connectors are pulled out of the front panel. Put the
daughterboard to the side.
11. Replace the XVME-660 module, reconnect all connectors, etc.
5. Locate the P5 connector on the mainboard slightly in front of and between the P1 and
P2 VME backplane connectors (see also the drawing on p. 11).
6. Pull the metal clips on either side of the SODIMM until it pops up at an angle
(roughly 30 from horizontal).
7. Grasping the upper two corners or the edges of the SODIMM, gently pull it out of the
socket and set it to the side.
8. Insert the new SODIMM until it fits snugly into the connector.
9. Gently push the SODIMM down until the metal clips snap into place to hold it. If you
cannot gently push the SODIMM into position, you may need to redo step 8.
10. Replace the daughterboard.
12. Power up the unit and make sure that the memory is recognized (during bootup on
the Boot-time diagnostic screen that can be turned on in the BIOS, see p. 41). This appendix contains the board assembly drawings (top view) for the XVME-660. Figure B-1 is the assembly drawing for the XVME-660/71x and the XVME-660/31x modules. Figure B-2 is the assembly drawing for the XVME-660 daughterboard.
