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DATX100工控卡件
IDE控制器支持增強的PIO模式，這減少了向硬盤傳輸16位數據的周期時間。與您的驅動器手冊，查看您使用的驅動器是否支持這些模式。這個PIO模式越高，循環(huán)時間越短。作為IDE電纜長度循環(huán)時間的減少會導致不穩(wěn)定的操作。因此，保持IDE電纜盡可能短符合您的最佳利益。
可以在BIOS設置中選擇PIO模式（參見第36頁）。如果驅動器：支持自動ID命令。如果遇到問題，請更改將模式轉換為標準模式。XVME-660有一個144針小外形雙列直插內存模塊（SODIMM）插入內存的站點。
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。按照以下步驟安裝SODIMM：
1.遵循標準的防靜電程序，以將損壞XVME-660及其部件。
2.關閉XVME-660的電源，將其從VME背板上卸下，并將其放在保險柜上防靜電（接地）表面。
3.如果尚未拆下，則拆下所有接頭。
4.卸下子板，輕輕地將其向后拉，以便IP、SCSI和PMC（如果有）連接器從前面板中拔出。把女兒板在旁邊。
更換XVME-660模塊，重新連接所有連接器等。
5.將主板上的P5連接器定位在P1和P2 VME背板連接器（另見第11頁的圖紙）。
6.拉動SODIMM兩側的金屬卡子，直到它以一定角度彈出（水平方向約30）。
7.抓住SODIMM的上兩個角或邊緣，輕輕地將其從插座并將其設置到側面。
8.插入新的SODIMM，直到它緊貼連接器。
9.輕輕向下推SODIMM，直到金屬卡子卡入到位，將其固定。如果你無法輕輕將SODIMM推到位，可能需要重新執(zhí)行步驟8。
10.更換子板。
12.接通設備電源，確保內存被識別（啟動期間可在BIOS中打開的啟動時間診斷屏幕，請參閱第41頁）。本附錄包含XVME-660的電路板裝配圖（俯視圖）。圖B-1是XVME-660/71x和XVME-660/31x模塊的裝配圖。圖B-2是XVME-660子板的裝配圖。
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.
