_ DEC-O-LOG for DWBUA

_ DOL, DWBUA-R001, UNIBUS Adapter, AUG 87

PROBLEM: T1010-LK004-New Part REV. "D1/D2", 1. Add a parity gate
array. Micro code PROMS changed and jumper wires removed which
allow the microbits to be shared. 2. BUA to send NOACK response 
to all unused register accesses on the BIA internal register
space. 3. Change the BUA Unibus interface to wait for the
deassertion of SSYN before a requesting device asserts BBSY.
4. New Unibus sequence code makes NPR independent of data transfer
transaction.  5. Microcode changes.  T1010-LK005-New Part Rev. "E1/E2",
1. Current Ucode fails on systems configured with DMZ32, BA11-K
AND BA11-A boxes. Ucode upgraded to allow for menu ordering.
T1010-LK008-New Part Rev. "F1-F6", 1. DWBUA drops address bit 0 when
CPU does DATO(B) to high byte of a device register immediately
after the DWBUA completes a OW WRITE to purge a buffered datapath.
2. DWBUA responses with four ACKs to a IDENT request when
processing a passive release, causing the next BI master to get
illegal confirmation error when it receives the fourth ACK. 

FIELD EFFECTIVITY: Retrofit all DWBUA options on VAX 82X0/83X0/
85X0/8700/8800s to Revision Level "B1". This FCO incorporates
the following ECOs: ECO T1010-LK004-New Part Revision "D1/D2"
(This Rev. never shipped), ECO T1010-LK005-New Part Revision
"E1/E2", ECO T1010-LK008-New Part Revision "F1-F6". 

QUICK CHECK: E67 is 23-314F4-00.

     This revised FCO supersedes Rev. A released 22 June 1987. 
     It has been revised to correct step 15 on page 4, and
     step 13 on page 6. 


FCO KIT ORDERING:
EQ-01324-01  FCO, PARTS
EQ-01324-02  FCO, PARTS
FA-04604-02  FCO only


_ DOL, DWBUA-I002, UNIBUS ADAPTER APR 88

PROBLEM: After a powerfail, the system will
bugcheck when doing a warm restart.     

FIELD EFFECTIVITY: Retrofit all 82XX, 83XX, 85XX,
87XX, 88XX systems which are configured with a
DWBUA and Battery Back Options.  Field spares
stock should also be upgraded.     

QUICK CHECK: Revisions "H1-H7". Check for 23-329F4-00
at location E67.     


        
FCO KIT ORDERING:
EQ-01509-01  FCO, PARTS
FA-04805-01  FCO only