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Commodore 1581: Overview, Related Topics & Entities

The Commodore 1581 is a 3½-inch double-sided double-density floppy disk drive that was released by Commodore Business Machines (CBM) in 1987, primarily for its C64 and C128 home/personal computers. The drive stores 800 kilobytes using an MFM encoding but formats different from the MS-DOS (720 KB), Amiga (880 KB), and Mac Plus (800 KB) formats. With…

Language: English [EN]
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Commodore 1581 topic overview

The analysis highlights Overview, Related Topics and Entities as prominent areas in the source structure around Commodore 1581.

Related topics
31
Source areas
1
Connected nodes
32
Extracted relationships
40
Concept neighborhoods
14
Bridge connections
32

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Overview · 31 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Backward compatibility
Commodore 128: 1 · Commodore 64: 1 · Plus/4: 1 · Commodore 16: 1 · VIC-20: 1
Connectivity
Commodore proprietary serial IEEE-488 burst mode 9000 bytes/s
CPU
MOS 6502 @ 2 MHz, WD1770 or WD1772
Dimensions
63 mm × 140 mm × 230 mm 2.5 in × 5.5 in × 9.1 in: 125
Discontinued
1990
Introductory price
US$399 (1987) equivalent to $1,100 in 2025

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How Commodore 1581 connects Entity context

The extracted context around Commodore 1581 shows recurring relationship patterns in the source. For example, Commodore 1581 → C1581, CMD FD2000, Commodore, Copy, D81, DCN-2692, Disk Drives, FD4000 Games, Floppy Drive, Games, How, MS-Windows, PC, Permanent, READ, SEGA SF-7000, Tool, Tools, WRITE Another extracted example is Commodore 1581 → Commodore 128: 1, Commodore 16: 1, Commodore 64: 1, Plus/4: 1, VIC-20: 1. Use these groups to spot repeated connection types before inspecting the individual relationships.

Commodore 1581

Top relations

related to External links · 19
Commodore 1581 → C1581, CMD FD2000, Commodore, Copy, D81, DCN-2692, Disk Drives, FD4000 Games, Floppy Drive, Games, How, MS-Windows, PC, Permanent, READ, SEGA SF-7000, Tool, Tools, WRITE
Backward compatibility · 5
Commodore 1581 → Commodore 128: 1, Commodore 16: 1, Commodore 64: 1, Plus/4: 1, VIC-20: 1
Connectivity · 1
Commodore 1581 → Commodore proprietary serial IEEE-488 burst mode 9000 bytes/s
CPU · 1
Commodore 1581 → MOS 6502 @ 2 MHz, WD1770 or WD1772
Dimensions · 1
Commodore 1581 → 63 mm × 140 mm × 230 mm 2.5 in × 5.5 in × 9.1 in: 125
Discontinued · 1
Commodore 1581 → 1990
Introductory price · 1
Commodore 1581 → US$399 (1987) equivalent to $1,100 in 2025
Manufacturer · 1
Commodore 1581 → Commodore Business Machines
Media · 1
Commodore 1581 → 3½" floppy disk DS: 125 DD using MFM
Memory · 1
Commodore 1581 → 8 KB RAM, 32 KB ROM: 125

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

1581 disk drive commodore 1571 floppy ms-dos 1541 drives also kb system read controller 64 mfm wd1770 ieee-488 bytes 3½-inch

Commodore 1581 relationships Subject–Predicate–Object triples

TTTA extracted 40 structured relationships around Commodore 1581. Examples in this analysis include Commodore 1581 → Backward compatibility → Commodore 128: 1 and Commodore 1581 → Backward compatibility → Commodore 64: 1. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Commodore 1581Backward compatibilityCommodore 128: 11.00infobox
Commodore 1581Backward compatibilityCommodore 64: 11.00infobox
Commodore 1581Backward compatibilityPlus/4: 11.00infobox
Commodore 1581Backward compatibilityCommodore 16: 11.00infobox
Commodore 1581Backward compatibilityVIC-20: 11.00infobox
Commodore 1581ConnectivityCommodore proprietary serial IEEE-488 burst mode 9000 bytes/s1.00infobox
Commodore 1581CPUMOS 6502 @ 2 MHz, WD1770 or WD17721.00infobox
Commodore 1581Dimensions63 mm × 140 mm × 230 mm 2.5 in × 5.5 in × 9.1 in: 1251.00infobox
Commodore 1581Discontinued19901.00infobox
Commodore 1581Introductory priceUS$399 (1987) equivalent to $1,100 in 20251.00infobox
Commodore 1581ManufacturerCommodore Business Machines1.00infobox
Commodore 1581Media3½" floppy disk DS: 125 DD using MFM1.00infobox
Commodore 1581Memory8 KB RAM, 32 KB ROM: 1251.00infobox
Commodore 1581Operating systemCBM DOS 10.01.00infobox
Commodore 1581Power10 W (220 V at 50 Hz)1.00infobox
Commodore 1581PredecessorCommodore 15711.00infobox
Commodore 1581Released1987; 39 years ago (1987)1.00infobox
Commodore 1581Storage790 KB: 1251.00infobox
Commodore 1581TypeFloppy drive1.00infobox
Commodore 1581Weight1.4 kg (3.1 lb): 1251.00infobox
Commodore 1581is a3½-inch double-sided double-density floppy disk drive that was released by Commodore Business Machines0.90text

Related concept clusters Concept neighborhoods

The concept neighborhoods around Commodore 1581 bring nearby vocabulary together. In this analysis, examples include Disk, Dos and Drive. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Commodore 1581
    • Disk
    • Dos
    • Drive
    • Floppy
    • Access
    • Compatible
    • Ieee-488
    • Mode
    • Released
    • Uses
    • Also
    • Kb
  • commodore 1581
    • Disk
    • Dos
    • Drive
    • Floppy
    • Access
    • Compatible
    • Ieee-488
    • Mode
    • Released
    • Uses
    • Also
    • Kb
  • floppy disk
    • Floppy
    • Controller
    • Access
    • Low-level
    • Drive
    • Compatible
    • Format
    • Mfm
    • Pc
    • Released
    • Using
    • Wd1770
  • commodore business machines (cbm)
    • Disk
    • Dos
    • Drive
    • Floppy
    • Access
    • Compatible
    • Ieee-488
    • Mode
    • Released
    • Uses
    • Also
    • Kb
  • commodore 64
    • Disk
    • Dos
    • Drive
    • Floppy
    • Access
    • Compatible
    • Ieee-488
    • Mode
    • Released
    • Uses
    • Also
    • Kb
  • commodore dos
    • Disk
    • Dos
    • Also
    • Drive
    • Floppy
    • Access
    • Compatible
    • Ieee-488
    • Mode
    • Released
    • Subdirectories
    • Uses
  • wd1770
    • Mfm
    • Controller
    • Floppy
    • Bytes
    • Disk
    • Dos
    • Format
    • Ieee-488
    • Low-level
    • Mode
    • Released
    • Rom
  • ibm pc compatible
    • Read
    • Compatible
    • Pc
    • Software
    • Drives
    • Floppy
    • Access
    • Disk
    • Disks
    • Dos
    • Format
    • Low-level

Connections between topic areas Semantic bridges

Bridges highlight paths between different parts of the Commodore 1581 map and can reveal research angles that are easy to miss in a flat list.

Min side: 3

Map overview Semantic statistics

Commodore 1581

Nodes33
Edges32
Triples40
Avg. degree1.94
Density0.060606
Components1

Source & methodology

TTTA analyzes the structure around Commodore 1581 to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Overview, Related Topics & Entities, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Commodore 1581 · EN edition · Analysis: TopicsToTalkAbout

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