Feeds

Naked at 30: Osborne 1 stripped to its chips

He ain't heavy. He's my TV typewriter

Security for virtualized datacentres

Mega-floppies with mini-capacity

If you've been around personal computers for a few decades, you'll remember when floppy disks were, well, floppy. The dual 5.25-inch drives in the Osborne 1 used those flexible, black-sleeved disks, the decendants of earlier 8-inch floppies.

Osborne 1, second version - 5.25-inch floppy drive slot

That oh-so-convenient port below the drive could house extra floppies (click to enlarge)

The original machine accepted only single-density disks with the amazingly miniscule capacity of 92KB. A double-density, factory-installable optional card, however could just about double that capacity, bringing it up to 182KB.

Osborne 1, second version - 5.25-inch floppy drive double-density controller card

Trust me, if you want an Osborne 1, you want this optional double-density card (click to enlarge)

According to Oldcomputers.net, the double-density option allowed the floppy drives to also read disks formatted as Xerox 820 single density (82KB), Cromemco single density (80KB), IBM Personal Computer (156KB in the CP/M-86 format), and DEC VT-180 (171KB).

Here are a few views of the full-height 5.25-inch drives in the Osborne 1:

Osborne 1, second version - 5.25-inch floppy drive, front

The front of the drive (click to enlarge)

Osborne 1, second version - 5.25-inch floppy drive, back

The back (click to enlarge)

Osborne 1, second version - 5.25-inch floppy drive, bottom

The bottom, complete with belt drive (click to enlarge)

Osborne 1, second version - 5.25-inch floppy drive, top

Looking into the drive from the top, with floppy inserted (click to enlarge)

As large as these floppy drives now appear, they were compact when compared to the 8-inch drives in my teardown of an S-100 system that I built oh, so many years ago.

Top 5 reasons to deploy VMware with Tegile

Next page: Video and Power

More from The Register

next story
How the FLAC do I tell MP3s from lossless audio?
Can you hear the difference? Can anyone?
iPAD-FONDLING fanboi sparks SECURITY ALERT at Sydney airport
Breaches screening rules cos Apple SCREEN ROOLZ, ok?
Crouching tiger, FAST ASLEEP dragon: Smugglers can't shift iPhone 6s
China's grey market reports 'sluggish' sales of Apple mobe
Apple's new iPhone 6 vulnerable to last year's TouchID fingerprint hack
But unsophisticated thieves need not attempt this trick
The British Museum plonks digital bricks on world of Minecraft
Institution confirms it's cool with joining the blocky universe
Turn OFF your phone or WE'LL ALL DI... live? Europe OKs mobes, tabs non-stop on flights
Airlines given green light to allow gate-to-gate jibber-jabber
Be your own Big Brother: Keeping an eye on Mum and Dad
All watched over by machines of loving grace
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
Intelligent flash storage arrays
Tegile Intelligent Storage Arrays with IntelliFlash helps IT boost storage utilization and effciency while delivering unmatched storage savings and performance.
Beginner's guide to SSL certificates
De-mystify the technology involved and give you the information you need to make the best decision when considering your online security options.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
Secure remote control for conventional and virtual desktops
Balancing user privacy and privileged access, in accordance with compliance frameworks and legislation. Evaluating any potential remote control choice.