This release should be considered an alpha product. Significant feature and overall stability improvements have been made in this version.
All future versions will maintain snapshot capability with this version.. Version 0.5 and earlier snapshots are no longer supported.
Installation Notes
See Installation in the README for details.
The MANUAL.md contains more detailed instructions on using the emulator.
- Windows 10 or later required - Users will likely run into SmartScreen warnings as this is not a signed executable
- macOS Catalina or later
- Linux 64-bit - Tested under Ubuntu 20.xx (.deb file) and Manjaro (source build.)
New Features
For a complete list of changes see the CHANGELOG.md
- Maximized / non-debugger screen view mode added
- macOS Catalina support
- Dual hard drive emulation on Slot 7
- New Debugger Screen (WIP)
- Gamepad support
- Fast emulation mode
- Mouse tracking on the host desktop under GS/OS
- All Self-Diagnostic tests pass
Fixes
- Improved performance
- Better emulation of Apple II graphics modes
- Cycle timings based on the 28mhz IIgs clock
- IWM 3.5" disk emulation improvements to support more copy protection mechanisms and disk switching
- Apple II style floating bus
- Various I/O register fixes
- Shadowing and 80COLSTORE fixes
- ADB keyboard handling improvements
- Disabled s2d1 IWM Smartport
- Snapshot stability
Known Issues
- No 640 mode dithering
- ROM 1 not supported
- SCC only implemented to pass self-diagnostic (i.e. no practical use.)
- No ethernet, printers.
- Mockingboard VIA implementation is inefficient
- Textfunk demo does not work
- Ninjaforce demo does not work (No bit 16 address shadowing)
Tested Software
- Various titles from the "What is the Apple IIgs" launcher
- GS/OS System Software 6.0.1, 6.0.4
- ProDOS 8/16
- Where in the World is Carmen Sandiego (IIgs)
- California Games
- Kings Quest I, IV
- Space Quest I
- Thexder
- Silpheed
- Rastan
- Ultima IV remastered