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--- geos [2026/07/19 03:06] – created fritigern
+++ geos [2026/07/19 20:41] (current) – [Articles about GDOS64] fritigern
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 <wrap lo>Parts of this article have been copied from [[https://en.wikipedia.org/wiki/GEOS_(8-bit_operating_system)|Wikipedia's page about GEOS]].</wrap>
-GEOS is an acronym that stands for Graphic Environment Operating System. It was originally developed by Berkeley Softworks and the first version was released for the C64 in 1986.
+GEOS is an acronym that stands for **G**raphic **E**nvironment **O**perating **S**ystem. It was originally developed by Berkeley Softworks (later renamed to GeoWorks), and the first version was released to consumers in 1986.
+Official versions (contains info from [[https://www.c64-wiki.com/wiki/GEOS|C64 wiki]]) :
+{{tablelayout?rowsHeaderSource=Auto}}
+^ GEOS Version  ^ Release year  ^ Notes   ^
+| 1.0 | 1985  | Beta version for developers  |
+| 1.1 | 1985  | Beta version for developers  |
+| 1.2 | Jan. 1986  | First version available for consumers  |
+| 1.3 | June 1986 | First version for other languages |
+| 1.5 | 1987/88 | GEOS version that got bundled with the C64C |
+| 2.0 | June 1988 | GEOS 2.0 is presented in the CES in Las Vegas |
+Unofficial community-created versions
+{{tablelayout?rowsHeaderSource=Auto}}
+^ GEOS Version  ^ Release year  ^ Notes   ^
+| 2.5 | 1993 | German publisher Mark & Technik developed this version in collaboration with "GUC - GEOS User Club" |
+| MegaPatch3 | 1999 | Patched version of GEOS to work with 4 drives, CMD devices, and more. |
+| GDOS64 | January 6, 2022 | GEOS compatible, standalone project. Has many features from MegaPAtch3, but is a separate project.\\ **//Active project//**|
+===== Articles about GEOS =====
+<!-- NOTHING YET -->
+----
+===== Articles about GDOS64 =====
+  * [[Installing GDOS64|Installing GDOS64 on your Ultimate]] - Detailed instructions on how to get GDOS64 up and running on your Ultimate device.
+  * [[Fastboot for GDOS64|Start GDOS64 in seconds with FastBoot]] - GDIS64 is great, but it takes so long to start up! But it doesn't have to be that way!
+{{tag>GEOS GDOS64 MegaPatch3 "Operating System"}}