[ATARI] Altirra 2.0

[0] faust @ Sobota, 24 Grudnia 2011 23:18CET

Uffff... po 52 wersjach testowych, po ostatnim, niepokojąco długim okresie milczenia jaki spowił Altirrę od prawie miesiąca w końcu pojawiła się oficjalnie wersja 2.0.0. I wreszcie, wszystkie poprawki jakie zostały naniesione na ten emulator ośmiobitowej rodziny mikrokomputerów i konsol ATARI można podsumować jednym spisem zmian.

Ciekawe czy w 2.x.x doczekamy się w końcu poprawnej obsługi plików .cas (zapis!).

Altirra 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 $6B 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. "foonbar".
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 $0400 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.

wstecz24/12/2011 23:18

Dodatkowe informacje

Altirra, an 8-bit Atari computer emulator - virtualdub.org

http://virtualdub.org/altirra.html

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.