Operating systems › Commodore GEOS › GEOS 2.0
GEOS 2.0
1988
The 1988 upgrade adding improved fonts, better printer support and enhancements to geoWrite and the desktop.
Machines
Chips
Reference & documentation
External technical references for programming GEOS 2.0 and for writing emulators.
| Resource | Type | Notes |
|---|---|---|
| Inside geoWrite: The VLIR Overlay System ↗ | Format | VLIR overlay file format internals explained |
| GEOS Memory Map (Thornton) ↗ | Memory map | Complete C64/128 GEOS memory layout with addresses |
| Hitchhiker's Guide to GEOS (revised 2022) ↗ | Programming | 860-page revised GEOS assembly programming guide |
| Zimmers.net GEOS Software Archive ↗ | ROMs | GEOS disk images, boot disks, drivers, tools |
| GEOS Programmer's Reference Guide (Boyce/Zimmerman) ↗ | Reference | Every kernal routine, inputs, outputs, error codes |
| The Hitchhiker's Guide to GEOS ↗ | Reference | 568-page Berkeley Softworks GEOS programming bible |
| mist64/geos - GEOS 2.0 KERNAL Source ↗ | Source | Reverse-engineered kernal source; builds byte-identical binaries |
| mist64/geowrite - geoWrite 2.1 Source ↗ | Source | Reverse-engineered GEOS application source, overlay example |
| GEOSLib for cc65 ↗ | Tool | Cross-compile GEOS applications in C |