Texas Memory Systems XP-15 Benutzerhandbuch

 

 

PCI200 User Guide 

Texas Memory Systems, Inc. (8/6/01) 

C-2 

3 

ECHO 

RO  Indicates the XP-15 has returned an ECHO packet 

2 

SPR 

RO  Indicates the XP-15 has returned an SPR packet 

1 

DIAG 

RO  Indicates the XP-15 has returned a diagnostic packet 

0 

STAT 

RO  Indicates the XP-15 has returned a status packet 

 

 

Low PCI SN command address register (32 bits, R/W) 

Bit # 

Name 

Type  Description 

31-3 

NA 

R/W  This register is used to establish the low 32-bits of the PCI 

address for SN commands to the XP-15. This register consists 

of the bottom 32-bits of a 32-bit counter with the low-order 

three bits hardwired to zeroes.  Transfers must  begin on a 

Double DWORD (64-bit) boundary. 

2-0 

Reserved 

RO  These bits are reserved (must be written with zeroes).  

 

 

High PCI SN command address register (32 bits, R/W) 

Bit # 

Name 

Type  Description 

63-32 

NA 

R/W  Upper bits of this register are not used. 

 

 

 

Low PCI SN response address register (32 bits, R/W) 

Bit # 

Name 

Type  Description 

31-3 

NA 

R/W  This register is used to establish the low 32-bits of the PCI 

address for SN responses from the XP-15. This register 

consists of the bottom 32-bits of a 32-bit counter with the low-

order three bits hardwired to zeroes.  Transfers must  begin 

on a Double DWORD (64-bit) boundary. 

2-0 

Reserved 

RO  These bits are reserved (must be written with zeroes).  

 

 

High PCI SN response address register (32 bits, R/W) 

Bit # 

Name 

Type  Description 

63-32 

NA 

R/W  Upper bits of this register are not used.