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Commodore 1581

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…

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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

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Commodore 1581

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

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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 Word statistics

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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

Entity relationships Subject–Predicate–Object triples

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

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