_ DEC-O-LOG for DEQNA _ DOL, DEQNA-R001, Q-bus Ethernet Adapter JUN 86 PROBLEM: Any Micro-PDP11 or Micro-VAX LSI-Bus systems which are attached to Ethernet using the DEQNA at revision level "D" or earlier will need this "Required" FCO. Replace all M7504 (DEQNA) modules below REV "E1/E2" with reqorked devices. Purge all units from shelf stock in the Field Logistics Stockrooms and SR# 17 which have not been ECO'ed (M7504-MK005) and return for rework to rev "E1/E2." This FCO implements ECO M7504-MK005. FIELD EFFECTIVITY: Undetected Data Corruptions can occur and/or a device "lock-up" can be seen when the DEQNA is busy with a transmit pre-fill operation and a receive message comes in. The DEQNA will appear to be hung and requires a device or system reset to clear the "lock-up." QUICK CHECK: Prescence of chip #23-087K4-00 in location E11. FCO KIT ORDERING: EQ-01418-01 FCO, PARTS FA-04703-01 FCO only _ DOL, DEQNA-O002, M7504 Ethernet Controller, DEC 89 PROBLEM: 1.)Late collisions occurring on packets being received by the module may go undetected causing undetected data corruption. 2.)Transmit buffer RAM problem may cause undetected data corruptions. FIELD EFFECTIVITY: Replace "as needed" DEQNA's (M7504's) in the Field which are exhibiting problems listed in Problem Section. QUICK CHECK: 1.) Verify DEQNA-M (M7504-00) at Revision "K3" or higher. 2.) Verify DEQNA-SA (M7504-PA) at Revision "D1" or higher. FCO KIT ORDERING: EQ-01551-01 (DEQNA-M) FCO, PARTS EQ-01551-02 (DEQNA-SA) FCO, PARTS FA-04856-01 FCO only