³q°T¨ó©w
¡@
¡@¡@ÅX°Ê
AHA1542CP°t±µ¥dªº©R¥O¦@¦³¨âºØ¡A¤@ºØ¬O¥Î¨Ó³]©w¥dªº©R¥O(¦p°t±¥dªºµwÅéªì©l¤Æ¡Bmailboxªºªì©l¤Æ)ºÙ¬° adapter©R¥O¡A³oºØ©R¥Oª½±µ³z¹L¥dªºI/O°ð¥[¥H³]©w¡A¥t¤@ºØ«h¬O¥Î¦bSCSI¸Ë¸m¶¡ªº©R¥O¡AºÙ¬°SCSI©R¥O¡A³oºØ©R¥Oªº³]©w¤è¦¡¬O±NCCB (Command Control Block)©ñ¦bmailboxùØ¡AµM«á¦A¥ÑSCSI°t±µ¥d¨Ó°õ¦æ¡C¥H¤U´X¸`±N·|¥[¥H¤¶²Ð¡C¶l¥ó«H½c
(Mailbox)¡@¡@
AHA-1542CP°t±µ¥d¡A¨Ï¥Î²³æªº¶l¥ó«H½c¨ó©w¡]mailbox protocol¡^¨ÓÅX°Ê°t±µ¥d¡A¥H§¹¦¨SCSI initiator ©ÎªÌtarget ¼Ò¦¡ªº°Ê§@¡C¦Ó¦b¶l¥ó«H½c¤¤©ñªº«h¬O©R¥O±±¨î°Ï¶ô¡]Command Control Blocks ²ºÙ CCBs)¡C¦b³o¸Ì§ÚÌ¥un±N¾A·íªºCCBs©ñ¤J¶l¥ó«H½c¤¤¡A°t±µ¥d¦ÛµM´N·|¨ÌCCBs¤¤ªº©R¥O°Ê§@¡C¡@¡@¶l¥ó«H½c¤S¤À§O¬°¥Ñ
PC¶Çµ¹°t±µ¥dªºMailBox Out(MBO)©M¥Ñ°t±µ¥d¶Çµ¹PCªºMailBox In(MBI¡^¨âºØ¨ó©w¡Cªí
1¥]§t4ÓCCBªº¶l¥ó«H½c¡@
Base Addr |
¡@ |
¡@ |
¡@ |
+0 |
Command |
CCB 4 Pointer |
MBO 0 |
+4 |
Command |
CCB2 Pointer |
MBO 1 |
+8 |
00 |
Free Entry |
MBO 2 |
+12 |
Command |
CCB3 Pointer |
MBO 3 |
+16 |
00 |
Free Entry |
MBI 0 |
+20 |
Status |
CCB1 Pointer |
MBI 1 |
+24 |
00 |
Free Entry |
MBI 2 |
+28 |
00 |
Free Entry |
MBI 3 |
¡@
¡@¡@ªí
1¬°¤@¨å«¬ªº¶l¥ó«H½c¬[ºc¨CÓ¶l¥ó«H½c³£»Ý¦³¬Û¦P¼Æ¶qªºMBO©MMBI¶i¤JÂI¡Cªí1¤¤ªºBase addr¬°¶l¥ó«H½c¦bPC°O¾Ð¤¤ªºª«²z¦ì¸m¡C¨CÓ¶i¤JÂI³£¬O4 byteªø¡A³o4Óbyte¤¤ªº²Ä¤@Óbyte°O¿ýCCBs°õ¦æªºª¬ºA¡A«á3Óbyte«h¬°CCBs¦bPC°O¾Ð¤¤ªºª«²z¦ì§}«ü¼Ð¡C¥H¤U´N¹ïMBO©MMBI¥[¥H»¡©ú¡C¡@
¤U¤@¶ ¦^º¶