Altirra 2.70 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 2.70 Changelog:
* Debugger: Switched BRK back to being a single byte opcode in the disassembler.
* Debugger: Readjusted names of illegal opcodes.
* Devices: SoundBoard has been moved to the Devices tree.
* Input: Because some broken axis mappings have been corrected, hand-edited input maps may need to be fixed up.

[features added]
* ATBasic: Added LOMEM, ERR(), PMGRAPHICS, PMADR(), PMCLR, PMCOLOR, PMMOVE, MISSILE, and BUMP().
* Audio: Sound output is auto-switched to 48KHz to reduce CPU usage if Windows is mixing at that rate.
* Debugger: Added ~ command (target control).
* Debugger: bx (break on expression) can now create tracepoints (-n).
* Debugger: Added Go To Source from History window.
* Debugger: .basic_dumpline command now has -t option for decoding TurboBasic XL tokens.
* Debugger: Added Go until vertical blank interrupt (gv) command.
* Debugger: Execution history now shows high level emulation events.
* Debugger: Added sw (search words), sa (search ATASCII), and si (search INTERNAL).
* Debugger: Added %%S format to .printf for high byte terminated strings.
* Debugger: Added @frame, @clk, and @cclk expression psuedovariables.
* Devices: Add minimal SDrive raw disk access emulation.
* Devices: Veronica cartridge emulation.
* Devices: R-Verter emulation.
* Disk: Added 1050 drive sounds and added emulation of 1050 reseeking on errors.
* Disk: Added "shift to another drive" option to disk dialog.
* Display: Optimized NTSC high artifacting mode.
* Display: Improved performance of D3D11 vsync code.
* Display: Enhanced text mode now works in full screen mode and supports selection.
* HLE: Added player for some SAP type B/C/R files.
* IDE: Raised VHD creation size limit in UI from 4GB to 2TB.
* IDE: Added support for MyIDE II with updated CPLD firmware.
* Input: Dead zones and curves are now adjustable for game controllers.
* Input: Keyboard mapping is now customizable.
* Profiler: Added Basic block profiling mode.
* Profiler: Added performance counter support.
* Profiler: Instruction-level data is now recorded even in function mode.
* Profiler: Frame triggers can now be set to record multiple frames.
* Recorder: Added support for recording SAP type D files.
* SIO: Merged standard and polled burst I/O into a single mode.
* SIO: Burst I/O is now supported for writes.
* Simulator: Emulation is no longer paused while menus are open.
* UI: Audio monitor now supports dual POKEYs.
* UI: Paste now attempts to translate Unicode characters like curly quotes and dashes to representable characters.
* UI: Raised drag-and-drop limit to 128MB to accommodate The!Cart images.
* UI: Portable mode now stores relative paths for paths above the program directory on the same drive root.

[bugs fixed]
* 65C02: Added missing BIT abs,X instruction (65C02 mode only).
* 65C816: Stack instructions new to the 65C816 now properly index outside of page one in emulation mode.
* 65C816: Fixed PLY instruction not working outside of page one in X8 mode.
* 65C816: Fixed WAI releasing execution too early on IRQs in high speed mode.
* ANTIC: Fixed blanking of rows 8-9 in IR mode 2.
* ANTIC: Fix incorrect internal state after warm reset during WSYNC wait.
* AltirraOS: Activate self-test ROM after memory test to mimic the XL/XE OS´s behavior when doing ROM checksums.
* AltirraOS: Improved compatibility of S: plot/line commands in GR.0.
* AltirraOS: E:/S: open now enables keyboard IRQs.
* AltirraOS: Fixed BOOT? flag being set too early on cassette/disk boots.
* AltirraOS: CIO PUT RECORD with length=0 now outputs A without EOL.
* AltirraOS: XL/XE version now supports KEYREP.
* AltirraOS: Caps Lock now toggles in XL/XE mode.
* ATBasic: Fixed bug with terminating EOLs being left in code if a warm reset happened during a filename-based I/O statement.
* ATBasic: Fixed CLOAD/CSAVE not setting IRG mode consistently.
* Cartridge: Fixed crash with MegaCart 1M (2) mapper.
* Cartridge: Fixed crash problem with RAM access in newly created The!Cart cartridges.
* Cartridge: Newly created AtariMax 8Mbit (bank 0) carts had the wrong power-up bank.
* Cartridge: Fixed random crash with Atrax SDX cartridge types.
* Debugger: Fixed Step Over not working in 65C816 mode.
* Debugger: Fixed B/P/S registers being shown incorrectly in history view in 65C816 mode.
* Debugger: Improved call stack decoding.
* Debugger: Fixed assembly/disassembly of MVP/MVN instructions.
* Debugger: Fixed assembly of [dp],Y addressing modes.
* Debugger: Fixed crash when canceling edit of watch expression.
* Debugger: Fixed disassembly of BIT abs,X instruction in 65C02 mode.
* Debugger: Fixed .readmem command.
* Debugger: Up/down keys now work better in History when navigating search results.
* Debugger: Fixed time wrapping bug in .pokey deferred timer reporting.
* Debugger: Fixed length (Lxxx) arguments not accepting 10000 for $10000 bytes.
* Debugger: Fixed crash with malformed read/write access range checks in breakpoint conditional expressions.
* Debugger: Fixed assembler not accepting PHX, PHY, RTL, TCS, and TXA instructions.
* Debugger: Fixed assembler not assembling some instructions with [dp] and relative long addressing modes.
* Debugger: Assembler no longer uses the debugger´s numeric base setting and always assumes decimal unless $ is prefixed before a number.
* Disk: Fixed boot sector not being initialized when precreating formatted DOS 3 disks.
* Disk: Data checksum errors during SIO bus transfers now result in a NAK instead of Error.
* Disk: Improved accurate sector timing values for enhanced density disks.
* Disk Explorer: Fixed crash when activating context menu with no disk image mounted.
* Disk Explorer: Empty filenames are no longer allowed.
* HDevice: Fixed regression in NOTE/POINT commands.
* Input: Fixed right mouse button on mice not working for ports 2/4.
* Input: Fixed inconsistent mappings between analog/digital interpretations of axes and between DirectInput and XInput.
* Network: Fixed protocol handling bugs in emulated ARP and DHCP layers.
* Network: Add support for tunneling over the VXLAN protocol.
* Simulation: Added timeout to logic for holding Option on boot.
* Simulation: Added emulation of floating I/O memory bus on 800 hardware.
* PCLink: Fixed FLEN (code 4) command.
* PIA: Interrupt flags can now be set without having interrupts enabled.
* PIA: Reenabling IRQA1 or IRQB1 with the flags already set now reasserts IRQ.
* PIA: Added emulation of floating inputs on PIA port B on XL/XE systems.
* POKEY: Serial input no longer works while initialization mode is active.
* POKEY: Full keyboard scan emulation is now supported, including phantom key and debounce-off effects.
* Recorder: Video recording failed if scanlines were enabled without VBXE or antialiasing on.
* U1MB: Removed bogus PORTB dependency for register access.
* U1MB: Flash ROM is now reset on cold reset.
* U1MB: Flash writes to OS, BASIC, and Game ROM windows are now supported.
* U1MB: Real-time clock now properly allows both clock polarities.
* U1MB: Fixed value of reserved bits read from RTCIN register.
* U1MB: Internal BASIC now works with 1200XL + U1MB, since the U1MB emulates the XL/XE MMU.
* UI: Fixed /portablealt writing into the current directory instead of starting directory when given a relative path.
* UI: Changed cursor mode to fix drag-and-drop incompatibility with 7-Zip File Manager.
* UI: Audio monitor setting now saves.
* UI: Selecting a 1200XL kernel no longer switches the hardware mode to 800XL.
* UI: Fixed firmware options not refreshing consistently in dialog.
* XEP80: Fixed UART register emulation.
* XEP80: Attributes, split-screen, and vertical scrolling are now supported in pixel graphics mode.

Download: Altirra 2.70
Source: Here