Retro B5500

The Burroughs B5500 was an innovative computer system. Released first as the B5000 in 1962 and then, with minor improvements and a new disk subsystem, re-released as the B5500 in 1964, its design was a radical departure from other commercial systems of the day. Many of the concepts that it embodied were being worked on and implemented by others around the same time, but it is difficult to think of another system that pulled so many new concepts together and made them work so well in a commercially-successful product: * Stack- and descriptor-oriented instruction set * Variable-length memory segments * Hardware bounds checking * Unified integer/floating-point numeric format * Designed for and programmed exclusively in higher-level languages * Designed for and managed by a sophisticated operating system, the Master Control Program, or MCP * Multi-programming (multiple tasks sharing the same processor) * Multi-processing (multiple physical processors sharing common memory and I/O) * Automatic memory allocation and address relocation * Automatic memory segment overlay (what we now call virtual memory) * Use of labeled file media and automatic assignment of labeled file media to requesting programs (what we now call automatic volume recognition) The B5500 was the foundation for the Burroughs B6x00/7x00/A Series systems, which are still produced and sold today as Unisys ClearPath MCP systems. Retro B5500 is the open-source project pkimpel/retro-b5500 (https://github.com/pkimpel/retro-b5500) by pkimpel, released under MIT. Ion packages it unmodified from commit fe4de5db6de2, adding only a manifest, an icon and a storage compatibility script.

Written by pkimpel, published to Oikou by Ben Grande.

• ★ 81 stars on GitHub
• Licence: MIT
• Upstream version release-1.05
• Built from commit fe4de5db6de2

View the repository on GitHub

Not rated. Nobody has said who this app is suitable for, so Personal Clouds and the Oikou app treat it as 18+.

Internet

It asks to reach these hosts, and no others:

• ajax.googleapis.com

Personal Cloud tools

• Keep a database of its own on your Personal Cloud ion.db

Notifications

It does not send push notifications.

Storage

Up to 16 MB on your Personal Cloud.

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