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Zoë Blade's notebook

1581

Being born in the UK in 1981, my articles about home computers are biased towards that time and place. This is due to both my own personal experience, and also a conscious attempt to provide an alternative UK bias to the predominant US bias amongst English-speaking people my age reminiscing about home computers.

1581 tech specs

  • Released: 1987
  • Price: £199.99[1]
  • Clearance price: £115[2]
  • Company: Commodore
  • Type: Floppy disk drive
  • CPU: MOS 6502A[3]
  • RAM: 8 KB[3]
  • ROM: 32 KB[3]
  • Media: Double sided, double density 3½″ disks[3]
  • Capacity: 3,160 blocks (790 KB)

The 1581 was a 3½″ floppy disk drive made by Commodore. It's technically compatible with the VIC 20, C64, Plus/4, C16, and C128,[3] although its beige colour scheme complements just the C128 and C64C.

It can format each disk to a whopping 3,160 blocks (790 KB). In 1541 terms, that's equivalent to over four 5¼″ disk sides, without even having to turn over the disk.

Being a 16-bit generation drive for 8-bit generation home computers, it would have been quite opulent. I've never heard of anyone actually having one (or even having heard of one) back in the twentieth century, although I've since seen YouTube videos by collectors.

Naturally, I also haven't heard of any C64 software actually being sold on a 3½″ disk. That would scarcely have been a problem for someone who had amassed a small collection of single loader budget tapes, and wanted to format shift them onto disk with the aid of an Action Replay cartridge, for quicker loading... The problem would be trying to find, much less afford, a 1581 drive in the first place.

References

  1. "Technical Developments" Technical Developments (Vendor), Zzap!64, Jul 1988, p. 30
  2. "Megaland" Megaland (Vendor), Zzap!64, Oct 1988, p. PC Showcase page 11
  3. "1581 manual" Commodore, 1987, pp. 1, 125

Downloads

Documentation

Commodore 64: 1530 | 1541 | 1581 | Pro-16

Commodore 128: 1571 | 1581