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GEOS (Graphic Environment Operating System) is a discontinued operating system from Berkeley Softworks (later GeoWorks). Originally designed for the Commodore 64 with its version being released in 1986, enhanced versions of GEOS later became available in 1987 for the Commodore 128 and in 1988 for the Apple II family of computers. A lesser-known version was also released for the Commodore Plus/4.

GEOS closely resembles early versions of the classic Mac OS and includes a graphical word processor (geoWrite) and paint program (geoPaint).

Watch over christmas mac os. A December 1987 survey by the Commodore-dedicated magazine Compute!'s Gazette found that nearly half of respondents used GEOS.^[1](p4) For many years, Commodore bundled GEOS with its redesigned and cost-reduced C64, the C64C. At its peak, GEOS was the third-most-popular microcomputer operating system in the world in terms of units shipped, trailing only MS-DOS and Mac OS (besides the original Commodore 64's KERNAL).^{[citation needed]}

Other GEOS-compatible software packages were available from Berkeley Softworks or from third parties, including a reasonably sophisticated desktop publishing application called geoPublish and a spreadsheet called geoCalc. While geoPublish is not as sophisticated as Aldus Pagemaker and geoCalc not as sophisticated as Microsoft Excel, the packages provide reasonable functionality, and Berkeley Softworks founder Brian Dougherty claimed the company ran its business using its own software on Commodore 8-bit computers for several years.

Development[edit]

Written by a group of programmers, the GEOS Design Team:^[2] Jim DeFrisco, Dave Durran, Michael Farr, Doug Fults, Chris Hawley, Clayton Jung, and Tony Requist, led by Dougherty, who cut their teeth on limited-resource video game machines such as the Atari 2600, GEOS was revered^{[citation needed]} for what it could accomplish on machines with 64–128 kB of RAM memory and 1–2 MHz of 8-bit processing power.

Unlike many pieces of proprietary software for the C64 and C128, GEOS takes full advantage of many of the add-ons and improvements available for these systems. Commodore's 1351mouse is supported by GEOS, as are its various RAM expansion units. GEOS 128 also fully supports the C128's 640×200 high-resolution VDC display mode through a compatible RGB monitor.

The C64 version of GEOS incorporates a built-in fast loader, called diskTurbo, that significantly increases the speed of drive access on the slow 1541. GEOS is the first Commodore software that could use a floppy disk as swap space or virtual memory.^[3] GEOS 128 can take advantage of the C128's enhanced 'burst mode' in conjunction with the 1571 and 1581 drives. The Commodore version of GEOS uses a copy protection scheme that renders users' disks unbootable if it detects that the disk has been illegally duplicated.^[4]

Via Berkeley's special geoCable interface converter or other third-party interfaces to connect standard RS-232 or Centronics printers to the Commodore serial bus, GEOS supports a wide variety of printers, including HPPCL printers and the Apple LaserWriter. This ability to print to high-end printers was a major factor in making GEOS a desktop publishing platform.

The Apple II version of GEOS was released as freeware in August 2003. The Commodore 64/128 versions followed in February 2004.

The latest GEOS desktop suite for IBM PC compatibles is Breadbox Ensemble. Revivals were seen in the OmniGo handhelds, Brother GeoBook line of laptop-appliances, and the NewDeal Office package for PCs. Related code found its way to earlier 'Zoomer' PDAs, creating an unclear lineage to Palm, Inc.'s later work. Nokia used GEOS as a base operating system for their Nokia Communicator series, before switching to EPOC (Symbian).

GEOS versions[edit]

• 1986: GEOS for Commodore 64
• 1987: GEOS for Commodore C128, Commodore Plus/4 (unofficial)
• 1988: GEOS for Apple II, GEOS V2.0 for Commodore C64, GEOS V2.1 for Apple II
• 1989: GEOS V2.0 for Commodore C128^[5]

Reverse engineering efforts[edit]

On August 19, 2016, Michael Steil posted in his blog^[6] that the source code for GEOS 2.0 for Commodore C64 had been fully reverse-engineered the cc65 compiler suite. The reverse-engineered source code has been made available at Github.^[7]

GEOS products and applications[edit]

Dozens of official and third-party applications and other products were produced for GEOS. Among the most important and popular were the following:

• geoBASIC
• geoCable
• geoCalc
• geoChart
• geoDex
• geoDraw
• geoFAX
• geoFile
• geoFont
• geoLabel
• geoPaint
• geoPrint
• geoProgrammer
• geoSpell
• geoWrite
• geoWrite Workshop
• Writer 64 (Timeworks)^[8]

See also[edit]

References[edit]

Unlike many pieces of proprietary software for the C64 and C128, GEOS takes full advantage of many of the add-ons and improvements available for these systems. Commodore's 1351mouse is supported by GEOS, as are its various RAM expansion units. GEOS 128 also fully supports the C128's 640×200 high-resolution VDC display mode through a compatible RGB monitor.

The C64 version of GEOS incorporates a built-in fast loader, called diskTurbo, that significantly increases the speed of drive access on the slow 1541. GEOS is the first Commodore software that could use a floppy disk as swap space or virtual memory.^[3] GEOS 128 can take advantage of the C128's enhanced 'burst mode' in conjunction with the 1571 and 1581 drives. The Commodore version of GEOS uses a copy protection scheme that renders users' disks unbootable if it detects that the disk has been illegally duplicated.^[4]

Via Berkeley's special geoCable interface converter or other third-party interfaces to connect standard RS-232 or Centronics printers to the Commodore serial bus, GEOS supports a wide variety of printers, including HPPCL printers and the Apple LaserWriter. This ability to print to high-end printers was a major factor in making GEOS a desktop publishing platform.

The Apple II version of GEOS was released as freeware in August 2003. The Commodore 64/128 versions followed in February 2004.

The latest GEOS desktop suite for IBM PC compatibles is Breadbox Ensemble. Revivals were seen in the OmniGo handhelds, Brother GeoBook line of laptop-appliances, and the NewDeal Office package for PCs. Related code found its way to earlier 'Zoomer' PDAs, creating an unclear lineage to Palm, Inc.'s later work. Nokia used GEOS as a base operating system for their Nokia Communicator series, before switching to EPOC (Symbian).

GEOS versions[edit]

• 1986: GEOS for Commodore 64
• 1987: GEOS for Commodore C128, Commodore Plus/4 (unofficial)
• 1988: GEOS for Apple II, GEOS V2.0 for Commodore C64, GEOS V2.1 for Apple II
• 1989: GEOS V2.0 for Commodore C128^[5]

Reverse engineering efforts[edit]

On August 19, 2016, Michael Steil posted in his blog^[6] that the source code for GEOS 2.0 for Commodore C64 had been fully reverse-engineered the cc65 compiler suite. The reverse-engineered source code has been made available at Github.^[7]

GEOS products and applications[edit]

Dozens of official and third-party applications and other products were produced for GEOS. Among the most important and popular were the following:

• geoBASIC
• geoCable
• geoCalc
• geoChart
• geoDex
• geoDraw
• geoFAX
• geoFile
• geoFont
• geoLabel
• geoPaint
• geoPrint
• geoProgrammer
• geoSpell
• geoWrite
• geoWrite Workshop
• Writer 64 (Timeworks)^[8]

See also[edit]

References[edit]

1. ^Elko, Lance (1 May 1988). 'Editor's Notes'. Compute!'s Gazette. Vol. 6 no. 59. ISSN0737-3716. Retrieved 11 February 2021 – via Internet Archive.
2. ^GEOS User's Manual, Version 1.2Archived 2015-09-23 at the Wayback Machine, Printed: October 1986, Berkeley Softworks, 2150 Shattuck Avenue, Berkeley, California 94704
3. ^'GEOS: A Whole New World for your Commodore'.
4. ^'Info magazine Issue 14'.
5. ^http://www.guidebookgallery.org/timelines/geos
6. ^http://www.pagetable.com/?p=869
7. ^https://github.com/mist64/geos
8. ^Guerra, Bob (May 1989). 'Writer 64'. Compute!. p. 78. Retrieved 11 November 2013.

Further reading[edit]

• Farr, Michael (15 February 1987). The Official GEOS Programmer's Reference Guide. For Commodore 64/64C/128. Includes versions 1.0, 1.1, and 1.2. Berkeley Softworks. Bantam Books. ISBN978-0553344042. OCLC16684486. OL7825792M – via Internet Archive.

• Tornsdorf, Manfred; Kerkoh, Rüdiger (1 May 1988). GEOS Inside and Out: An introduction to GEOS, its applications and internals (2nd ed.). Abacus Software Inc. ISBN978-0916439811. OCLC18446175. OL11434890M.

External links[edit]

• Breadbox Home of the GEOS operating system (down, archived here at the Internet Archive)
• The Commodore GEOS FAQ v1.5.0 – By Bo Zimmermann
• GEOS: The Graphical Operating System A lengthy review of GEOS and its history

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UFO 50 is a collection of 50 single and multiplayer games from the creators of Spelunky, Downwell, and Catacomb Kids. Explore a variety of genres, from platformers and shoot 'em ups to puzzle games, roguelites, and RPGs. Our goal is to combine a familiar 8-bit aesthetic with new ideas and modern game design.

• 50 BRAND NEW GAMES – These are NOT minigames or microgames! Although the size of each game varies, every one is a complete experience with its own title screen, intro, and ending. Some are small arcade-style games but there are also larger open-world adventures and a JRPG that could take many hours to beat.
• AN ALTERNATE UNIVERSE – According to the story of UFO 50, the games were all created by a fictional 80s video game company that was obscure but ahead of its time. Some games are sequels to other games in the collection and various characters appear in multiple titles as part of a shared continuity.
• AN INSTANT LIBRARY – All 50 games are available to play at the start! The concept was inspired by multicarts, retro collections, and the experience of going to a friend's house and perusing their game library. Jump in and out of games at a whim – exploring the collection is part of the fun!
• AUTHENTIC BUT ALSO MODERN – We carefully chose what elements to modernize. Every game shares a unique 32-color palette and we took great efforts to make them look and sound like actual 8-bit titles from the 80s. On the other hand, it was important to us that UFO 50 was fun and surprising for modern players, so we chose not to limit ourselves to the genres and design conventions of the past.
• VERSUS AND CO-OP PLAY – Roughly a third of the collection features local multiplayer, including co-op and versus. You can compete head-to-head in a new fighting or strategy game… or team up to beat a classic arcade game from an alternate timeline. It's great for groups!

Here are some of games you'll get to play in UFO 50:

CAMPANELLA 2 – The sequel to Campanella (another game in UFO 50), Campanella 2 features procedurally-generated levels where you can explore in your UFO but also hop out to enter shops and dangerous caves. You play as the intrepid treasure-hunter Isabell, but she hasn't always been a hero – by playing the entire collection you can learn more about her past.

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QUIBBLE RACE – In this unique sci-fi 'horse-racing' game, the goal is to win more money than your opponents, but why stop at betting? Thanks to the seedy alien underworld, you can hire thugs to tamper with the race or even sponsor your own quibble to earn extra credits. But your opponents can do the same, so the question is… how well can you anticipate their actions? Up to 3 players can compete in this turn-based game of betting and bluffing.

PINGOLF – A fan favorite at PAX, Pingolf is another fun multiplayer game that mixes golf with pinball. As you navigate 18 holes filled with bumpers, trampolines, and other crazy obstacles, a dot matrix display will light up at the bottom of the screen to cheer you on!

SEASIDE DRIVE – Sometimes you'll want a break from long, open-world games and challenging strategy titles, so why not jump into a straight-forward arcade-style action game like Seaside Drive? But even in a popular genre, UFO 50 brings something new to the table – in this case, Ojiro Fumoto (the creator of Downwell) designed a stylish car-based shoot 'em up where 'drifting' across the screen is how you power-up your gun.

GRIMSTONE – Yes, there is a full blown JRPG in the collection! Grimstone follows many conventions from 8-bit console RPGs, but is streamlined for a modern audience. Also, to make combat more engaging, we added a skill-based component to battles and encounters on the overworld can be strategically avoided. The story takes place in the American Wild West, where somehow the land has been swallowed up by Hell! Creating your party from the ashes of a burned-down saloon, you'll be looking for answers as to why it happened.

And that's just five games! Out of 50! So come join us and enjoy this collection of 8-bit classics from another dimension! There's something for everyone!

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• • OS: Windows 7
  • Processor: 1.2 GHz processor
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  • Graphics: 256 MB
  • Additional Notes: Made with GameMaker Studio 2

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