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Review of the moment
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XTale
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Titel: mini vMac 2.5.0 public beta
 Verfasst am: 16.11.2004, 00:10 Uhr
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Site Admin
Anmeldungsdatum: 04. Jul 2004
Beiträge: 1.868
Wohnort: Dillingen / Saar
Status: Offline
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[Deutscher Text:]
bei mini vMac handelt es sich um einen Macintosh Plus Emulator.
Was in der public beta der Version 2.5.0 neu ist konnte ich aber leider nicht herausfinden.
[English text:]
mini vMac is a Macintosh Plus emulator, but I couldn´t figure out what´s new in the public beta 2.5.0
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Titel:
Verfasst am: 16.11.2004, 10:14 Uhr
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New for version 2.5.0:
Mini vMac now emulates the extended Parameter RAM of the Mac Plus, thanks to code contributed by Philip Cummins. Previously only the 20 byte PRAM of the original Macintosh 128 was emulated. The larger 256 byte PRAM stores additional information such as the time zone, latitude, longitude, and the alert sound. This information is not saved on quit. The Macintosh version will initialize the time zone, latitude, and longitude from the real machine's information. The Windows version only initializes the time zone. I have some code that can find the time zone for the X version, but I'm not sure how portable it is, so it is disabled.
The emulation of the SCC chip is improved a bit, so that booting with AppleTalk turned on won't hang, and printing to the imagewriter will successfully do nothing. The SCC code from the Windows version of Mini vMac was used as a starting point, with permission from Weston Pawlowski. (But unlike vMac for Windows, Mini vMac only tries to emulate serial ports that aren't connected to anything.) Also, thanks to Philip Cummins for pointing out the Zilog documentation for the SCC chip.
A small change to the VIA timer 2 code seems to stop the tendency to hang playing sounds in System 7. It seems to work ok, even though it doesn't fix what is probably the real problem, that Mini vMac only resolves time to about a millisecond, while the real VIA timer has much higher resolution.
The PowerPC assembly language is tweaked a bit more, making the Macintosh version about 20 to 40 percent faster.
The Restart command will now work in all system versions. It seems that, contrary to the impression given by the documentation, executing the 68000 RESET instruction doesn't change the memory overlay state. Or at least, empirically, that seems to work better.
Some subtle bugs involving word access to address registers have been fixed. The main known effect is that the game BachMan sounds different.
Bad accesses to disk images could previously cause data to be written past the end of the memory allocated for the emulated RAM, which in theory could cause Mini vMac to crash or worse. This has been fixed.
In the Macintosh version, the F1 and F2 keys are now mapped to emulated option and command keys, to match the Windows and X versions. This provides a way to type some key combinations that are intercepted by the OS of the real machine. For example F2-Shift-3 will take a screen shot in the emulated machine, whereas Command-Shift-3 takes a screen shot of the real Macintosh at the same time.
The interrupt button emulation is now more realistic. One consequence is that the interrupt button can be masked, if the processor's priority level is high enough.
Previously, in the Windows version, double clicking on a disk image in the open dialog would tend not to work, because the mouse button would still be down upon returning to Mini vMac, which prevents mounting. Mouse clicks are now handled differently, which solves this problem.
Previously, in the X version, quitting Mini vMac could be delayed if the window manager moves the window to the back when it is being closed (such as in Red Hat Linux 9). This is fixed.
Mini vMac now has a mechanism for reporting reaching a part of the emulation that hasn't been implemented, or at least never tested.
wie wärs damit
mfg ein noergler |
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XTale
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Titel:
Verfasst am: 16.11.2004, 13:52 Uhr
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Site Admin
Anmeldungsdatum: 04. Jul 2004
Beiträge: 1.868
Wohnort: Dillingen / Saar
Status: Offline
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das hab ich gesehn, aber das liest sich eher wie ein "dsa kann ich alles"  |
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