Altirra v2.3 is released. Altirra is an Atari 8 bit Emulator on the Windows/DOS platform. Altirra emulates several models of the 8-bit Atari computers. This includes the the 800, 800XL, and 130XE versions. It has a lot of options, and compatibility is decent especially given the emulator's early stages. It also supports some copy protected games properly in emulation.

Altirra v2.3 Changelog:

[features added] Cartridge: SIC! cartridges can now be switched between Am29F040B and SST39SF040 flash chip emulation in Options. Debugger: History pane supports horizontal scrolling and hiding S/P registers. Debugger: Added .readmem command. Debugger: .basic_dumpline command now handles DATA statements and decodes variable names. Debugger: The ESC key moves from several debugger panes to the Console pane. Debugger: Added set tracepoint (bt) command. Debugger: Added deref signed dword (dsd) operator. Debugger: Added brief (-b) format to .sio command. Debugger: .tapedata command now supports seeking options and reports gaps. Debugger: Added .reload command. Disk: Folders can now be mounted as virtual disk images using the SpartaDOS file system. Display: Normal overscan mode now only shows 224 scanlines in NTSC mode instead of 240. Display: Altered full screen resolution selection to allow possibly unsupported modes for better access to 50Hz refresh modes. IDE: Added SIDE 2 support. MMU: Added support for Axlon banked memory. Simulation: Split XL/XE hardware into separate XL and XE modes to handle hardware differences. UI: Full-screen mode can now be used when paused. UI: Added full-screen versions of the Boot Image file browser and emulation error dialog. UI: Added initial UI bindings for controllers (under the Console controller). UI: Added on-screen keyboard (activated by UI Option from main screen). UI: Improved text rendering quality. UI: Right-drag drop brings up a context menu with mounting options. UI: Panes can now be stacked with tabs. VBXE: Updated core support to 1.24, including a/r flag in bit 7 of the MINOR_REVISION register. [bugs fixed] 65C816: The abs,X, abs,Y, (dp),Y, [dp],Y and (d,S),Y addressing modes can now cross bank boundaries. 65C816: An additional instruction is no longer executed after WAI before servicing the interrupt. 65C816: JMP (abs) now always reads from bank 0 instead of the data bank. 65C816: JMP (abs,X), and JSR (abs,X) now read from the program bank rather than the data bank. 65C816: Fixed switch between DL=0 and DL!=0 in emulation mode not taking effect immediately. 65C816: Indexed modes now properly take an additional cycle for writes and for 16-bit index registers. 65C816: The d,S addressing mode can now index out of page one in emulation mode. 65C816: d,S and (d,S),Y now always read from bank 0. 65C816: 16-bit stack operations can access page zero and page two in emulation mode. 65C816: TCS/TXS can no longer change SH in emulation mode. Debugger: .tracecio now reports correct status. Debugger: Fixed an issue with stack overflow in History pane on very deep recursion. Debugger: Verifier now allows jumps to the CIO device initialization vectors. Debugger: Fixed incorrect wrapping of zero page indexed addressing modes in disassembly. Debugger: Threaded static trace (st) command. Debugger: e (enter) now follows normal expression evaluation rules. Debugger: Fixed disassembly of PEA ($F4) opcode. Debugger: PHX and PHY no longer create bogus call trees in the History window in 16-bit indexing mode. Debugger: Fixed disassembly of opcodes with the (d,S),Y addressing mode. Debugger: Corrected off-by-one index handling in .unloadsym command. Debugger: Fixed blowup with memory access breakpoints in GTIA range with VBXE enabled. Disk: Status byte 1 bit 5 is now updated after a Write PERCOM Block command. Display: Fixed a crash when Direct3D 11 is enabled and fails to initialize. Display: Fixed alignment errors in OS Screen Only mode with extended PAL height enabled. Display: Enabled frame skip and reduced latency in full screen vsync mode. GTIA: Player/missile size code %%10 can now trigger shifter lockup. GTIA: Improved accuracy of mid-shift size changes. HLE: Fixed editor tab commands. HLE: Fixed bug with init segment dispatching. IDE: READ SECTOR and WRITE SECTOR commands now allow up to 256 sector transfers. IDE: READ MULTIPLE and WRITE MULTIPLE commands now produce errors when multiple mode is disabled. IDE: The block size set by the SET MULTIPLE MODE command is now reflected in IDENTIFY DEVICE output. Input: Fixed MultiJoy #8 input conflict. LLE: Fixed system reset NMI handling. LLE: Implemented PBI handler and CIO support. LLE: Keyboard routines now update ATACHR. LLE: Fixed editor tab set/clear commands. LLE: Added printer (P:) device support. LLE: Added light pen/gun support. MMU: Fixed crashes accessing high 65C816 memory in the x64 version. MMU: VBXE can now properly overlay Covox. POKEY: Fixed timers 3+4 occasionally not being shut off when switching to asynchronous receive mode. POKEY: Fixed timers 1-3 having the wrong offset when underflowing immediately before a write to STIMER. POKEY: Corrected start timing of polynomial counters. POKEY: Corrected audio pattern for 9-bit and 17-bit polynomial counters (was incorrectly inverted). Recorder: Fixed 8-bit uncompressed output. Recorder: Minor fixes to compressor. Serial: SIO emulation level setting is now saved correctly. VBXE: Writing a '1' to the blitter start bit no longer aborts an active blit.

Download: Altirra v2.3
Source: Here