Version 2.00 [December 24, 2011]: 
[breaking changes] 
Debugger: The step over command has been changed from s to o.
[features added] 
UI: Added OS Screen size setting. 
UI: Added support for gzip compressed images (*.gz, *.atz). 
UI: Arrow key behavior is now configurable. 
UI: Added speed options. 
UI: Added option to control whether emulation sees the Shift key pressed after a Shift+F5 cold reset. 
UI: Added MRU list for booted images. 
UI: Color settings can now be exported as a palette file (*.pal). 
UI: Display API options can now be changed through the GUI (not just cmdline). 
UI: Added full screen resolution options. 
UI: Added single instance option. 
UI: Request 1ms system timer precision only when unpaused. 
UI: Added option to bind file associations in Windows for image types. 
UI: Added /run, /disk, /tape, and /cart switches to force load types on the command line. 
UI: Added mute option. 
Debugger: Added command aliases (ac, al, as, a8). 
Debugger: Added watch expression (wx) command. 
Debugger: Added multiple memory panes. 
Debugger: Added watch panes. 
Debugger: Initial version of debug display. 
Debugger: Disassembler can now display offsets from symbols. 
Debugger: Profiler now distinguishes between VBIs and DLIs in function sampling mode. 
Debugger: Profiler now shows unhalted cycle counts and DMA contention rates. 
Debugger: Added call graph profiling support. 
Debugger: Mouse wheel is now position-based instead of focus-based. 
Debugger: Address range breakpoints can now trigger commands. 
Debugger: Added log output filter commands (lfd/lfe/lfl/lft). 
Debugger: Added .ide command. 
Debugger: Enter (e) command now takes expressions. 
Debugger: Added bitwise/low-byte/high-byte operators and address/value variables to expression evaluator. 
Debugger: Break on expression command (bx) can now include address ranges. 
Debugger: Added dump double words (dd) command. 
Debugger: Go (g) command now has options to preserve and force source mode. 
Debugger: Added batch (.batch) command. 
Debugger: Added source mode control (.sourcemode) command. 
Debugger: Commands can now be queued to run when an EXE loads or runs. 
Debugger: Source line breakpoints can now be set prior to line debug information being available. 
Debugger: A matching .atdbg file is now processed when an executable loads. 
Debugger: startup.atdbg in the program directory is now processed on startup if present. 
Debugger: Ctrl+Up/Down from output window command line now scrolls log pane by single lines. 
Debugger: Added fill (f), search (s), and move (m) commands. 
Debugger: Register (r) command can now set individual flags. 
Debugger: Improved output of .pia command. 
Debugger: Call, loop, and interrupt collapsing in history window can now be toggled. 
Debugger: History window can now show timestamps in cycles, unhalted cycles, and microseconds from an anchor point. 
Debugger: Extended memory syntax now allows access to hidden RAM (r: prefix). 
Debugger: Added .tape and .tapedata commands. 
Disk: Added support for Write PERCOM Block command. 
Disk: Added option to auto-detect firmware overrides of disk accesses and automatically disable SIO patch for those drives. 
Disk: Live disk images can now be explored directly from the disk drive entry rather than requiring an unmount and remount. 
Disk: Disk explorer shows timestamps. 
Disk: .ARC compressed archives can now be explored. 
Disk: Fixed a couple of bugs with DCM disk image decoding. 
Cartridge: Added another Atrax 128K cartridge variant used for SpartaDOS X. 
Cartridge: Added support for OSS 8K, Blizzard 4K, AST 32K, Atrax SDX 64K, Turbosoft 64K, and Turbosoft 128K types. 
Cartridge: Added support for newer MaxFlash 1MB cartridges that power up in bank 0 instead of bank 127. 
Cartridge: Added support for 1M Megacart (different type with similar name). 
Cartridge: Added support for a 5200 64K cartridge with 32K banks. 
Input: MultiJoy8 support. 
Input: CX-80 and 5200 trackball support. 
Input: 1200XL F1-F4 keys can now be enabled in keyboard options. 
Input: ~ key is now an alternate mapping for the inverse key. 
IDE: KMK/JZ IDE / IDEPlus 2.0 emulation support. 
IDE: Initial SIDE emulation support. 
IDE: Solid-state mode supports up through PIO mode 6. 
IDE: Read-only physical disk access. 
GTIA: SECAM support. 
GTIA: Optimizations to mode 9 and mode 10 rendering. 
MMU: Added 800 8K/24K/32K/40K configurations. 
MMU: Added 320K and 576K Compy Shop configurations. 
MMU: Sped up extended bank switching. 
Simulator: Added XEGS support. 
SoundBoard: Multiplier support. 
POKEY: Rewrote sound core to defer repeating events whenever possible for extra speed.
[bugs fixed] 
ANTIC: Added emulation of bus data displaying at the very right border of a wide scrolled playfield. 
ANTIC: Improved accuracy of mid scan line changes to HSCROL and DMACTL. 
ANTIC: Fixed phantom DMA data during WSYNC. 
ANTIC: Implemented phantom DMA artifacts along right side of wide playfield. 
ANTIC: Fixed NMIs not being reactivated after a write to NMIRES on cycle 7. 
Disk: PERCOM block is now initialized for a drive without a disk. 
Disk: Fixed errors in PERCOM block track and sectors per track counts. 
Disk: Switching a disk from R/W to VirtRW mode now clears pending flush errors. 
Disk: Fixed incorrect serial transfer rates for XF551 high speed Put/Write and Write PERCOM commands. 
Disk: Fixed H: device not handling zero-byte get/puts properly with burst I/O enabled (affected GET/PUT from BASIC). 
Disk: H: device now supports OPEN with AUX1=7 to fix directory listing from DOS 2.5. 
Disk: Disk explorer now properly increments volume sequence number when modifying SpartaDOS X images. 
Disk: DSKINV hook now supports writes to sectors bigger than 128 bytes. 
Disk: Fixed crash with very short disk images. 
CPU: Fixed undocumented $BB opcode using abs instead of abs,Y addressing mode. 
CPU: Undocumented B opcode now supports decimal mode. 
Debugger: Profiler sometimes lost track of intermediate call frames during function sampling. 
Debugger: Mouse wheel now uses system wheel scroll setting. 
Debugger: Improved parsing of MADS listings. 
Debugger: Fixed command escaping so that escapes are no longer processed unless enabled, i.e. \"foo\nbar". 
Debugger: Register (r) can no longer clear bits 4 and 5 of P when unsupported by current CPU mode. 
Debugger: _ and . are now accepted as part of symbol names in expressions. 
Debugger: Fixed crash when attempting to load empty file as symbol file. 
Debugger: Source path matching now allows partial path matches both ways and has improved behavior with duplicate filenames in different directories. 
Debugger: Fixed wrapping of frame counter in history window. 
Debugger: Built-in kernel symbols now take priority over loaded symbols. 
Debugger: Fixed page scrolling in history window after enabling CPU history tracking. 
IDE: Added mandatory Recalibrate, Read Verify, Read Multiple, Write Multiple, Seek, Set Multiple Mode, and Initialize Device Parameters commands. 
IDE: Fixed response from device 1 status register. 
IDE: Improved response from Identify Drive command. 
IDE: Set transfer mode command is now supported. 
Cartridge: Reverted OSS 034M mapper back to original bank order and added OSS 043M mapper mode for alternate bank layout. 
Input: Fixed crash when activating triggers to unavailable controllers. 
PIA: Implemented IRQB and control bit 6. 
HLE: Fixed escape handling in display handler. 
HLE: Screen setup now matches the display list and playfield addressing of the stock OS ROM. 
HLE: Fixed cartridge handling so that cartridges are run after disk boot completes. 
HLE: Added known RTS instruction at $E4C0. 
HLE: CIO now allows SPECIAL commands to be issued on a closed IOCB. 
HLE: Boot loader now sets DBYTLO/DBYTHI to 00 before launching. 
HLE: Fixed crash in CIO on OPEN command with unknown device. 
HLE: S: now supports the Get Status, line, and fill commands. 
UI: Disk sector display was incorrect for accelerated writes. 
UI: Fixed crash if DirectX 9 is not installed. 
UI: Display window can no longer be undocked in full screen mode. 
UI: Adjusted default NTSC color preset. The old preset is still available. 
UI: Command-line processing now better matches standard VC++ escaping rules. 
UI: Direct3D9/OpenGL rendering now works over Remote Desktop with Windows Vista/7. 
SoundBoard: Restricted $D5/D6xx mapping to $D500-D53F and $D600-D63F. 
POKEY: Fixed incorrect latching on IRQST bit 4 (serial output ready IRQ). 
POKEY: Fixed deassert timing for IRQST bit 3 (serial output complete IRQ). 
POKEY: Added partial emulation of SKSTAT bit 4 (direct input) during disk transfers. 
Cassette: Fixed data blocks being silently dropped when reading some .cas files. 
Cassette: Fixed inaccuracy in data rate produced from loading .cas files. 
GTIA: Fixed incorrect color for %%1000 pattern in mode 10 with lores ANTIC input. 
VBXE: Warm reset no longer resets all registers like a cold reset.