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Plessey 6742/0

Plessey 6742/0
S/N 322
 
This Plessey system contains a DEC M8186 11/23 CPU board but all of the remaining boards are manufactured by Plessy Microsystems of Irvine California. The disk is an 8" Memorex with a capacity of about 80 MB. The Plessy disk controller makes the single Memorex disk look like three RK07 disks. It also contains a QIC 1/4" tape drive. The backplane is Q-bus but is hex-wide instead of the normal quad-wide. The backplane has a proprietary memory bus and the system has a mapper board. The mapper board makes this system a 6700 series instead of a 6600 series. RSTS-E 7.2-04 with an install date of 1984 is on the disk.
 
Q-bus Chassis
Slot AB CD EF
1
DEC M8186 11/23 KDF11-A CPU
Plessy 703755-100F VVC11A QIC Tape
2
Plessy 705100-101A KTV9H Terminator
Plessy 703830-100F DCV06B Disk
3
Plessy 703860-300F DCV06B Disk
4
5

Plessy 705020-00D DLV11J Quad Serial

6
7
Plessy 705155-100A SV512 Memory (512KB)
8
Plessy 705185-100C KTV25 Mapper
9
Plessy 705115-100 MFV11B Multifunction
 
 
 
Plessey 703755-100F VVC11A QIC Tape
 
Plessy 705100-101A KTV9H Terminator
 
Plessey 703830-100F DCV06B Disk
 
Plessey 703860-300F DCV06B Disk
 
Plessey 705020-00D DLV11J Quad Serial
 
Plessey 705155-100A SV512 Memory (512KB)
 
Plessey 705185-100C KTV25 Mapper
 
Plessey 705115-100 MFV11B Multifunction
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