AT&T 3B2/300 Technical Reference Manual page 613

- - - - - - - - - - - - - - - - Appendix: CONNECTOR AND CABLING INFORMATION
464-PIN BACKPLANE CONNECTOR, J02
PIN
DESCRIPTION
FUNCTION
001
+12V (V12P)
POWER
002 +5v (VCC)
POWER
003 FLOPPY READY (FRDY[O])
INPUT
004 FLOPPY SIDE SELECT (FSSEL[O])
OUTPUT
005 -12V (V12N)
POWER
006 FLOPPY READ DATA (FRDATA[O])
INPUT
007 GROUND (GRD)
GROUND
008
FLOPPY WRITE PROTECT (FWRPRT[O])
INPUT
009 FLOPPY TRACK O (FTRO[O])
INPUT
010 GROUND (GRD)
GROUND
011 FLOPPY WRITE GA TE (FWGA TE[O])
OUTPUT
012 FLOPPY WRITE DATA (FWDATA[O])
OUTPUT
013 FLOPPY STEP (FSTEP[O])
OUTPUT
014 FLOPPY DIRECTION SELECT (FDIRC[O])
OUTPUT
015 FLOPPY MOTOR ON (FMOTON[O])
OUTPUT
016 FLOPPY DRIVE SELECT 2 (FDS2[0])
OUTPUT
017
FLOPPY DRIVE SELECT I (FDSJ[O]) OUTPUT
018 FLOPPY DRIVE SELECT O (FDSO[O])
OUTPUT
019 +5V (VCC)
POWER
020
FLOPPY LOW RPM (FLOW[O])
OUTPUT
021 FLOPPY INDEX (FINDEX[O])
INPUT
022 FLOPPY DRIVE SELECT 3 (FDS3[0])
OUTPUT
023 NOT USED (FSP ARE[O])
INPUT
024
MEMORY CHECK BIT 00 (MCBOO[l]) INPUT /OUTPUT
025 MEMORY CHECK BIT OJ (MCBOl[l])
INPUT /OUTPUT
026 GROUND (GRD)
GROUND
027 MEMORY CHECK BIT 03 (MCB03[1])
INPUT/OUTPUT
028 MEMORY CHECK BIT 02 (MCB02[1])
INPUT /OUTPUT
029 MEMORY CHECK BIT 05 (MCB05[1])
INPUT/OUTPUT
030 MEMORY CHECK BIT 04 (MCB04[1])
INPUT /OUTPUT
031 +5v (VCC)
POWER
032 MEMORY CHECK BIT 09 (MCB09[1])
INPUT /OUTPUT
033 MEMORY CHECK BIT 06 (MCB06[1])
INPUT /OUTPUT
034 MEMORY CHECK BIT 07 (MCB07[1])
INPUT /OUTPUT
035
MEMORY CHECK BIT 08 (MCB08[1]) INPUT /OUTPUT
036 MEMORY CHECK BIT 11 (MCBll[l])
INPUT/OUTPUT
037
MEMORY CHECK BIT JO (MCBJO[l]) INPUT/OUTPUT
038
GROUND (GRD) GROUND
039 MEMORY DATA BIT 00 (MDOO[l])
INPUT/OUTPUT
040
MEMORY DATA BIT 01 (MDOl[l]) INPUT /OUTPUT
041 MEMORY DAT A BIT 02 (MD02[1]) INPUT /OUTPUT
042 MEMORY DATA BIT 03 (MD03[1])
INPUT/OUTPUT
043 GROUND (GRD)
GROUND
044 MEMORY DATA BIT 04 (MD04[1])
INPUT/OUTPUT
045
MEMORY DATA BIT 05 (MD05[1]) INPUT/OUTPUT
046 +5V (VCC)
POWER
047
MEMORY DATA BIT 06 (MD06[1]) INPUT /OUTPUT
048 MEMORY DATA BIT 07 (MD07[1]) INPUT /OUTPUT
049
MEMORY DATA BIT 08 (MD08[1]) INPUT/OUTPUT
050
MEMORY DATA BIT 09 (MD09[1]) INPUT/OUTPUT
051 MEMORY DATA BIT JO (MDJO[J]) INPUT/OUTPUT
052 MEMORY DATA BIT 11 (MDJJ[l])
INPUT/OUTPUT
053
MEMORY DATA BIT 12 (MDJ2[1]) INPUT /OUTPUT
054 MEMORY DATA BIT 13 (MDJ3[1]) INPUT /OUTPUT
055
GROUND (GRD) GROUND
056 MEMORY DATA BIT 14 (MD14[1]) INPUT /OUTPUT
057 MEMORY DATA BIT 15 (MD15[1]) INPUT /OUTPUT
058
MEMORY DATA BIT 16 (MD16[1]) INPUT /OUTPUT
• CM518C System Board signal description shown in
italics.
CONNECTOR AND CABLING INFORMATION B-31