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CHANGELOG.md

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Changelog

See planned features for a list of TODOs. Feel free to add to the list.

Known Issues

  • No 640 mode dithering - size of window really dictates how this mode looks and artifacts are obvious here
  • Textfunk scanline text effects do not work
  • Mockingboard emulation may slow down the system due to an inefficient VIA implementation
  • ROM detection is not friendly - make sure you find a valid ROM 3 file or else the system will not warn you and likely the emulated machine will hang (not the emulator itself.)

Version 0.6

Features

  • User view mode where IIgs display is maximized
  • Debugger mode GUI cleaned up (may be missing some features from prior versions)
  • Snapshots and other user data now saved to a specific location set by the user
  • Removed disk import feature and redesigned disk selection GUI
  • Slot 7 (ProDOS only) hard drive emulation
  • macOS Catalina and above support
  • Gamepad support on all supported platforms
  • Fast disk emulation where the machine is sped up during read and write operations
  • Fast emulation mode (not the most optimal, but it works to get 10-20x speed)
  • Partial SCC emluation to pass diagnostic tests
  • IIgs GSOS/Finder/Toolbox mouse to host desktop tracking
  • Paste text as keyboard input (does not work correctly on GSOS)
  • Debugger bload and bsave functionality
  • Linux Flatpak

Fixes

  • Fixed snapshot save issues
  • Fixed Apple II hires and double hires RGB emulation issues
  • Better 640 resolution mode support (no dithering still...)
  • Better support for per scanline color
  • VGC scanline and vertical sync/IRQ handling issues fixed
  • Fixed softswitches RDMIX and STATEREG.PAGE2
  • CPU and bus clock counters all based on an ideal master frequency of 28.636 Mhz, including 1Mhz stretch cycles
  • Apple II style floating bus
  • IWM refactored to reflect changes in clock frequency handling
  • Debugger: faster instruction tracing
  • DOC/Ensoniq fixes to pass diagnostic tests
  • Audio sync and lower playback latency
  • ADB SRQ/TALK keyboard functionality and system reset
  • 16-bit DBR based read and writes on bank boundaries operate on the next bank
  • Fixed page wrap logic to only occur if DL=0 on emulation mode
  • Clear key strobe on write to c010-1f
  • Ensure shadow map on writes is valid based on the final write page (bank 0,1 relevant)
  • 3.5" read/write bit cell timing fix for copy protection on certain titles
  • Disk switch detection for 3.5 and hard drives improved
  • WOZ CRC generation
  • RTC uses local timezone vs GMT clock
  • WAI fix
  • Removed s2d1 (IWM smartport) GUI (experimental feature still not fully developed)

Tested Devices

All 60 fps emulation when not in Fast disk mode

  • i5 2 core 1.4 Ghz (Ubuntu, 2011 Macbook Air 4GB)
  • i3 2 core 2.3 Ghz (macOS Catalina Hackintosh, 2016 Intel NUC6i3SYH 8GB)
  • i7 4 core (Windows 10 and Manjaro Dual Boot, 2016 i7 Desktop, 32GB)
  • i7-10750H 6 core 2.6 Ghz (Windows 11, 2021 Dell XPS 15 9500, 16GB)
  • M2 Macbook Air (macOS Ventura, 16GB)

Planned for Next Releases

  • 640 mode dithering effects
  • French keyboards (possibly other layouts)
  • Unmounted disk failures will save a backup to the disk library
  • Debugger improvements

Version 0.5

  • SmartPort 32MB Hard Drive on the disk port, virtual slot 2, drive 1
  • Gamepad and Joystick support on Windows (DirectInput) and Linux
  • ADB fix allowing Ctrl-RightAlt-F1 to trigger the Control Panel
  • IWM properly report spindle status on each drive
  • Decouple Apple IIGS device types and APIs from the 65816 emulator library into its own library
  • Moved some graphics mode bitmap rendering into the library
  • Added register set commands in the debugger

Version 0.4

  • New Debugger GUI and improved diagnostics display
  • New Disk Import/Save/Load system for disk images (save/load as WOZ image)
  • Mouse Support
  • Lores and Double Lores Support
  • Linux Builds with GCC using OpenGL for Rendering
  • Various Fixes
    • Fixed Super Hires Renderer to display correct colors
    • Ensoniq fix that didn't account for the default voice (Neuromancer music plays)
    • Fixed confusion between INTCXROM and SLOTROMSEL switches
    • IRQs in native mode were firing the emulated IRQBRK vector
    • Incorrect sync timing lead to invalid Vertical and Horizontal VGC counters
    • Corrected BIT immediate flag manipulation
    • Fixed 3.5" drive emulation disk-in-place query value (allowing GS/OS to boot)
  • Flashing Text
  • List toolbox calls in program trace
  • Updated dependencies
    • ImGui to 1.88 and
    • fmt to 9.1.0
    • sokol to latest

Version 0.3

  • Super Hi-res mode and ProDOS 16 boot to finder
  • 2MG 3.5 and 5.25" support
  • DO, PO and DSK Load and Save
  • Mockingboard C without SSI-223 (voice) support
  • Improved Apple II Speaker support (still flawed but better)
  • Boots Nox Archaist and various Apple II 128K games
  • Ensoniq support - boots Tower of Myraglen

Version 0.2

  • Serialization (Save/Load emulation state)
  • Various debugging improvements, breakpoints, trace logging
  • Baseline Apple IIe level support with ProDOS 8 and limited ProDOS 16 booting
  • Apple II Speaker support (simple square wave, flawed implementation.)
  • 3.5" disk formatting
  • HGR/DHGR Display
  • 40/80 column Text Display
  • 128K support
  • Several 65816 emulation fixes

Version 0.1

  • 64K, 16K bank IO flag support
  • 5.25" WOZ Disk Support
  • ROM 03 partial boot
  • Host application with 65816 debugging support
  • Basic 65816 emulation and native modes