Nowe wersja testowa Altirry emulatora ATARI XE/XL/5200/2600.
Ostatnia pełna wersja tego emulatora, autorstwa Avery 'Phaeron' Lee, jaka publicznie została udostępniona to Alirra 4.00 z 13 listopada 2021 r.
![[ATARI] Altirra x86 i x64 4.10 test XXV 20/11/2022](www/picphoto/19a443df1.jpg)
Geos Conv. (2022). W końcu i w sumie smutne, że GEOS nie trafił na Atari w latach osiemdziesiątych - to naprawdę był zacny system dla C64.
Altirra 4.01 Beta XXV (25) 20/11/2022
changes
- nw
features added
- nw
bugs fixed
- Debugger: Source window was keeping stale source line data when reloading symbols.
author's comment:
Fix for line number debug info not being refreshed properly in debugger source windows when reloading symbols
Altirra 4.01 Beta XXIV (24) 12/11/2022
changes
- nw
features added
- Debugger: Added Breakpoints pane and Ctrl+B as a shortcut for a new breakpoint.
- Devices: APT partitions on hard disks can now be opened in Disk Explorer.
- PerfAnalyzer: Added support for exporting to Chrome tracing format.
bugs fixed
- PerfAnalyzer: Fixed NMI showing as IRQ when NMI preempts IRQ.
- UI: Fixed focus glitching when selecting a docked tab with an undocked pane selected.
author's comment:
Adds support for exploring disk images stored in APT partitions. This is accessed by the context menu on a hard disk device:
...which then opens the Disk Explorer with a view of APT partitions on the disk, with options to mount the disk image within each partition, or import/export the partition as a disk image:
This should make it a bit easier to manage partitioned hard disks.
Altirra 4.01 Beta XXII (22) 16/10/2022
Rampage (Activision, Inc., 1987)
changes
- nw
features added
- Devices: Added shortcut command to temporarily mount VHD images in Windows to access FAT32 partitions.
bugs fixed
- Additions: Fixed BRK instruction in LOADEXE.COM.
- Devices: Fixed bug with virtual FAT16/FAT32 hard drives returning bad sector data when re-reading final partial data sectors of a file.
author's comment:
- Fixed a couple of issues with LOADEXE on the Additions disk and the Deferred/Disk Boot EXE loader modes.
- Fixed the virtual FAT16 and FAT32 devices returning bad data when re-reading the last data sector of a file.
- Added a command to temporarily remount a VHD in Windows for easier access to FAT32 partitions.
- Crash dialog now reports EXE-relative offset if available.
Altirra 4.01 Beta XXI (21) 3/10/2022
Montezuma's Revenge Redux (2021, TIX and Playsoft 2020)
changes
- nw
features added
- Devices: Added SimCovox support.
bugs fixed
- Devices: Fixed SD card multiple-block write command.
- Devices: Fixed SD card state not being reset on SD power toggle.
- POKEY: Improved accuracy of serial port clock timing.
author's comment:
- Fixed SD card multiple block write operations.
- Fixed messed up buttons in Tape Control dialog with new dark mode checkboxes.
- Fixed cassette audio dropping out after running continuously for >20 mins.
- Fixed OS C: workaround option affecting turbo tape reads.
- Added emulation of serial clock phase and reset.
- SIDE 3 SD power toggle now also resets SD card state.
- Added SimCovox emulation support.
Altirra 4.01 Beta XX (20) 17/09/2022
changes
- nw
features added
- Debugger: Memory pane now has an option to display 8bpp graphics.
bugs fixed
- nw
author's comment:
- Fixed a crash when disabling stereo with the downmix-stereo-to-mono option enabled.
- Optimizations and fixes to FLAC decoding.
- Added 8bpp graphics visualization mode to debugger memory pane.
Altirra 4.01 Beta XIX (19) 06/09/2022
Broadsides (1983, Strategic Simulations, Inc.)
Altirra 4.01 Beta XVIII (18) 28/08/2022
changes
- nw
features added
- Audio: Added 800 console speaker acoustics simulation.
- Firmware: Added detection of several XF551 firmware ROMs.
- UI: Added dark mode support for checkboxes and radio buttons.
bugs fixed
- Disk: XF551 full emulator now supports IN A,BUS instruction used by some modified firmware.
author's comment:
- XF551: Added missing IN A,BUS instruction preventing some modified firmware images from running.
- Added firmware detection for XF551 rev. 7.4/7.7 and US Doubler rev. L.
- Added 800 speaker emulation.
- Fixed a bug with the the speaker volume override in Advanced Configuration getting overwritten with stereo POKEYs enabled.
- Updated to latest Windows 11 SDK and removed macOS Wine64 crash workaround that should no longer be needed. Please indicate if this build starts crashing with that issue again.
- Disabled options in Configure Systems now still show their state.
- Added custom dark mode rendering support for checkboxes and radio buttons.
The 800 speaker emulation (Configure System > Outputs > Audio > Simulate console speaker) modifies the sound rendering of console speaker sounds to simulate the acoustics of the 2" speaker inside of the 800's case, which has some significant muffling and resonance. It's implemented by FFT convolution of the raw output with a step impulse that I recorded from an 800 with a microphone.
wstecz22/11/2022 00:37
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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.