DATANET 6600 Front-End Network Processor (FNP).

Dox:

60132445 FEP Coupler Spec Nov77 DC88 DATANET 6600 FRONT-END NETWORK PROCESSOR L66B Interrupt System 76122 DD01 DN35 assembler

gicb.map355

      rem       dia operation code symbol definitions
      rem

diatrg bool 65 transfer gate from cs to fnp diadis bool 70 disconnect diainf bool 71 interrupt fnp diajmp bool 72 jump diainc bool 73 interrupt cs diardc bool 74 read configuration switches diaftc bool 75 data transfer from fnp to cs diactf bool 76 data transfer from cs to fnp diawrp bool 77 wraparound

DN355 (later marketed as DN6632) used with 6180

DC88, pg 12: DATANET 6600 DCP6632 [should be a relabeled DN355)

32K memory
DIA
PSA interface to mass storage subsystem
CCA console/printer
TCU T&D cassette adaptor
2(3) x General Purpose Communication Bases (CPCB)
           16 comm. chan. boards each.
1(6) x Async. Comm. Bas Type 1 (ACB)
           24 slow lines

DN6661 (Reimplementation with new architecture)

AN85-01 pg 12-5: load_fnp_: "The load_fnp_ subroutine prepares the core image for bootload into the FNP. A segment is craeted in the process directory to contain the bootload program, bicb, and the core image. This segment is laid out as follows:

 0 ----------------
   | boot dcw     |
 1 ----------------
   |              |
   |   gicb       |
   |              |
   |--------------|
   | padding to   |
   | mod 64       |
   |--------------|
   | core         |
   | image        |
   ----------------

AY34-02B DATANET Operation (DN6661)

+------------+ +---+ +---+ +------------+ | Cache | | | | | | Peripheral | | Memory |-----| | | |----| Interface | ---- MPC ---- Disk Units +------------+ | | | | | Adpater | | | | | | +------------+ +------------+ | | | | | Central | | | | | System ---- Console | Processor |-----| | | |---- Support
+------------+ | | | | Controller ---- Diskette | | | | I | +------------+ | | | N | | Page | | | | P | Direct | Unit |-----| S | +-------+ | U |---- Interface ---- Host system +------------+ | Y | | | | T | Adpater | S |----| IOM |----| / | +------------+ | T | | | | O | | 32K-Word | | E | +-------+ | U |---- CIB/GPCB ---- Up to 8 lines | Memory |-----| M | | T | +------------+ | | | P | . | B | | U |---- Additional CIB/GPCB . | U | | T | . | S | | | . | | | B | +------------+ | | | U | | Additional | | | | S | | 32K-Word |-----| | | | | Memory | | | | | | Modules | | | | | +------------+ +---+ +---+