DECmpp 12000/Sx Model 100 Parallel VME Ref Manual

This document is the DECmpp 12000/Sx Model 100 Parallel VME Reference Manual, published in September 1992 by Digital Equipment Corporation.

It serves as a comprehensive guide to the DECmpp 12000/Sx Parallel VME (PVME) PCB (KF100–AA) and the Parallel VME 6U Adapter PCB.

The manual details:

1. PVME PCB: Its function as a buffer between the Data Parallel Unit (DPU) processing elements and VME devices, its connection via the Massively Parallel VMEbus (MPVMEbus), and its key features. These include an 8 MB parity-checked IORAM (Input/Output Random Access Memory) with specified performance rates, support for A24 and A32 VME addressing modes (master and slave), byte-swapping capabilities, and various control, status, DMA, and interrupt registers (e.g., OPCSR, OPSTATE, IODMACSR, IRQCSR). It also covers installation, hardware description (switches, jumpers, indicators), and diagnostic procedures.
2. Parallel VME 6U Adapter PCB: Its role in enabling standard VMEbus 6U PCBs to operate on the DECmpp 12000/Sx's extended MPVMEbus. It highlights the MPVMEbus's unique characteristics, such as parity generation/checking for data and addresses, and support for a jumper-selectable nonstandard voltage. The adapter also facilitates cabling between the DPU and other I/O devices. Hardware description, installation steps, and its Control and Status Register (6UCSR) are detailed.

Appendices provide information on PVME address maps and swap mode definitions. The document is intended for Digital Services personnel, self-maintenance customers, and system programmers.