The Digital Equipment Corporation KDJ11-A CPU Module User Manual provides detailed information on architecture, registers, memory management, installation…
This guide describes the KDJ11-A CPU module architecture, including general‑purpose registers, system control registers, cache memory, and the memory‑management unit. It also covers the functional theory of the DC111 microprocessor, software system interfaces, and the instruction set.
Installation procedures, power‑up and power‑down sequences, bus termination, and configuration options for single‑ and multiple‑backplane systems are detailed, along with diagnostic LED meanings and troubleshooting information.
| Size / Dimensions | 13.2 cm × 22.8 cm (5.2 in × 8.9 in) |
|---|---|
| Power Consumption | +5 V ±5 % at 4.5 A (maximum) with FP111‑AA |
| DMA Latency (worst case) | 2.2 µs |
It requires a +5 V supply with a tolerance of ±5 % and can draw up to 4.5 A when the FP111‑AA floating‑point accelerator is installed, or up to 4.0 A without it.
This manual explains 3 error codes. Open a code for its meaning, causes and what to do: