---
layout: page
title: PDP-11/45 Machine Configurations
permalink: /devices/pdp11/machine/1145/
---

PDP-11/45 Machine Configurations
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PDPjs supports a variety of PDP-11/45 machine configurations, including:

* [PDP-11/45 with Front Panel](/devices/pdp11/machine/1145/panel/)
* [PDP-11/45 with VT100 Terminal](/devices/pdp11/machine/1145/vt100/)

All of the above configurations include 248Kb of RAM -- the maximum supported by the PDP-11/45 architecture.
The top 8Kb of the PDP-11/45's 18-bit address space is occupied by the *I/O Page*, a region reserved for hardware
registers belonging to the CPU, MMU, and assorted peripherals.