Po cichu i trochę nieoczekiwanie pojawiła się finalna wersja 2.30 jednego z najlepszych w chwili obecnej programów, które pozwolą nam na udawanie ośmiobitowych, domowych mikrokomputerów firmy ATARI - począwszy od najstarszej serii 400 (koniec lat siedemdziesiątych), aż do XEGS (1987) - konsoli do gier stworzonej na bazie ATARI 65XE.
![[ATARI] Altirra 2.30 Final](www/picphoto/19a443df1.jpg)
Crystal Raider (Mastertronic, 1986)
Altirra v2.30 [15.05.2013]
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.
wstecz15/05/2013 23:03
I had access to a number of 8-bit computers in my childhood, but my most favorite was the Atari 800, a 1.79MHz 6502-based computer with color graphics and a disk drive, and which as the predecessor to the Amiga, another favorite of mine. Over a decade later, I was struck by both nostalgia and ambition and started to write a new 8-bit Atari emulator from scratch. This is the result.
At this point, I've learned a lot more about the Atari and Altirra now emulates more than I ever had or did years ago, but I still work on it periodically. It also serves as a modularity test for the VirtualDub code base, from which Altirra shares some components. If you are struck by nostalgia too or have a desire to do some Atari development, perhaps it might be useful to you, too.