3420/3803 Status/Sense Bytes - IBM 3420 Reference Manual

3420/3803 STATUS/SENSE BYTES
Bit 0 Bit 1
Bit 2 Bit 3 Bit 4
Bit 5·
Bit 6 Bit 7
Status
Byte Status Control Unit
Unit
Attention Modifier End Busy Channel-End Device-End Unit Check Exception
Sense
Byte Bit 0 (8)
Bit 1 (4) Bit 2 (2) Bit 3 (1) Bit 4 (8)
Bit 5 (4) Bit 6 (2) Bit 7 (1)
Byte 0 Command Reject Intervention Required
Bus-Out Check 15-030
Equipment Check 00-006 Data Check 00-006 Overrun 15-040 (U) Word Count Zero
Data Converter Check
15-020 (U) 15-010 (U)
~
(U) (U) (U)
15-050 (U) 15-070 (U)
Byte 1 Noise 17-370 (U) (D) TU Status A 00-006
~ .'. TU Status B 00-006 ~
Seven-Track 00-006 Load Point 00-006 ~ Write Status 00-006 ~ File Protected 00-006 ~ Not Capable 15-060 (U:
Byte 2 Track in Error 17-007
Byte 3 Read/Write VRC MTEILRC 17-110 Skew Error 17-160 (D) End Data Check/CRC VRC/Envelope Check 1600 BPI Set in TU Backward 00-007 P-Compare/C-Compare
17-170 (D) 17-310 (D) 17-530 (D) 17-22017-310 (D) 00-007 17-010 (D)
Byte 4 MP Hardware Error, Reject Tape Unit Tape Indicate 00-007 Write Trigger VRC Spare Loop Write to Read Tape Unit Check 00-007
Reserved for RPQ
00-007 (E) ~ 00-007 (E) 17-020 (D) 00-007
~
Byte 5 New Subsystem 00-007 New Subsystem 00-007 Write Tape Mark Check ID Burst Check 17-050 Start Read Check 17-070 Partial Record 17-410 Postamble Error 17-190 Reserved for RPQ
17-180 (D)
(U) (D) (D) (D)
Byte 6 Seven Track Tape Unit Write Current Failure Dual Density 00-007 3420 Not Set to 1600 Model 4/6/8 00-007 Tape Unit Model Identification 00-007
00-007 15-090 (E) ~ bpi 00-007
Byte 7 Lamp Failure 15-090 ~ Tape Bottom Left
~
Tape Bottom Right ~ Reset Key 15-090
~
Data Security Erase Erase Head Failed 15-090 Air Bearing Pressure
~ Load Failure 15-090 •
15-090 15-090 15-090
~
15-090
Byte 8 I BG Detected 17 -080 Spare Spare Early Begin Read Back SAGC Check 16-220 (E) Slow Begin Read Back Slow End Read Back Velocity Retry/Reset
(D)
Check 17-100 (E) (D) Check 00-007 (D) Check 17-150 (D) 00-007
Byte 9 1 or 2-Track Correction Velocity Change During Channel Buffer Check CRC III 17-54017-590 6250 Tape Control Spare Spare Tape Control Unit
17-600 Write 16-180 17-600 17-600
00-007
Reserved 00-007
(D)
Byte 10 Command Status Reject Spare Control Status Reject No Block Detected on Dynamic Reversal 16-200 Tach Start Failure 16-170 Spare
Velocity Check 16-180
16-160 (E) 16-210 (E) Write/WTM 16-190 (E)
(E)
(E) (E)
Byte 11 B-Bus Parity Error ALU1 Spare Low HOS Parity/Low IC Hi IC/Br Cond/Hi ROS Microprogram Detected D-Bus Parity ALU1
Spare
Br Cond Error ALU1
16-030 (B) ~ Parity on Branch Instruc- Register Parity 16-020 Hardware Error 16-060
1.6-040 (B)
~ 16-050 (B) ~
tion 16-010 (B)
~ (B) ~ (B)
~
Byte 12 B-Bus Parity Error Spare Low ROS Parity/Low IC Hi IC/Br Cond Error/Hi
Microprogram Detected
D-Bus Parity ALU2 Spare Br Cond Error ALU2
ALU2 16-100 (B) ~ Parity on Branch Instruc- ROS Register Parity
Hardware Error 16-130 16-11Q(B) ~
16-120 (B) ~
tion 16-080 (B)
~ 16-090 (B) ~ (B) ~
Byte 13 Tape Control Features
Tape Control Unique Identification (Hi,gh-Order Serial Number Digits)
Byte 14
Tape Control Unique Identificat ion (Low-Order Serial Number Digits)
Byte 15
Tape Unit Unique Identification (High-Order Serial Number Digits)
Byte 16
Tape Unit Unique Identification (Low-Order Serial Number Digits)
Byte 17 Tape Control Features Tape Control EC Level
Byte 18 Power Check/Air Flow. Spare Spare
Spare
Tape Unit EC Level
Byte 19 TU 7 Primed for DE
~
TU 6 Primed for DE
~
TU 5 Primed for DE
~ TU 4 Primed for DE ~ TU 3 Primed for DE ~ TU 2 Primed for DE ~ TU 1 Priml;ld for DE ~ TU 0 Primed for DE
•
Byte 20 TU F Primed for DE ~ TU E Primed for DE
~
TU 0 Primed for DE
~ TU C Primed for DE
~
TU B Primed for DE ~ TU A Primed for DE ~ TU 9 Primed for DE
~
TU 8 Primed for DE
I
Byte 21
Load Button Depressed
Left Reel Turning Right Reel Turning
Tap~
Present Reels Loaded
Load Rewind
Load Complete Load Check
Byte 22 Field Replaceable Unit Identification
•
Byte 23 Field Replaceable Unit Identification (See Control/Command Status Reject)
~
Notes: (B) Sets Bus-Out Check when there are no other bits
on in Sense Byte
O.
(D) Sets Data Check (E) Sets Equipment Check (U) Sets Unit Check
~
May Change Status Between Consecutive Sense
Commands
19