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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<title> Changes in Mini vMac 3.3.3 </title>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<link rel="canonical" href="v3.3.html">
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</head>
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<body>
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<div>
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<i> <a href="https://www.gryphel.com/index.html">www.gryphel.com</a>/c/<a href="../index.html">minivmac</a>/<a href="index.html">change</a>/v3.3
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- <a href="https://www.gryphel.com/c/feedback.html">feedback</a> </i>
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</div>
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<hr>
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<h3 align=center>
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Mini vMac 3.3.3 <!-- *<i>Beta</i>* -->
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</h3>
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<h3 align=center>
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Changes
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</h3>
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<hr>
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<p> What has changed in Mini vMac 3.3.3, compared to Mini vMac 3.2.3.
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This only lists changes that affect behavior, and so doesn't
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include cleanups of the source code. </p>
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<p> : </p>
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<p>
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default compile:
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</p>
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<blockquote>
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<p>
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<a href="v3.3.html#feature">New features</a>
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</p><p>
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<a href="v3.3.html#modified">Changed behavior</a>
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</p><p>
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<a href="v3.3.html#bugs">Bug fixes</a>
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</p>
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</blockquote>
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<p>
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not in default compile:
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</p>
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<blockquote>
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<p>
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<a href="v3.3.html#compile_feature">New features</a>
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</p><p>
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<a href="v3.3.html#compile_modified">Changed behavior</a>
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</p><p>
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<a href="v3.3.html#compile_bugs">Bug fixes</a>
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</p>
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</blockquote>
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<p>
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<a href="v3.3.html#build">Build System</a>
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</p>
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<p> : </p>
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<p> <a name="feature"> <b> New features in default compile </b> </a> </p>
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<!-- A new feature is something you would not notice if you used
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Mini vMac as you used it previously. If using it as you would previously
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would behave differently, that is "changed behavior". -->
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<!--
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<p> * None Yet. </p>
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-->
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<p> * More operating systems are officially supported by Mini vMac: </p>
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<blockquote>
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<p> FreeBSD on x86-32 (Using “<a href="../options.html#option_t">-t fbsd</a>” in the build system)
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<br> FreeBSD on x86-64 (“-t fb64”)
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<br> OpenBSD on x86-32 (“-t obsd”)
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<br> OpenBSD on x86-64 (“-t ob64”)
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<br> NetBSD on x86-32 (“-t nbsd”)
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<br> NetBSD on x86-64 (“-t nb64”)
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<br> Dragonfly BSD on x86-32 (“-t dbsd”)
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<br> Dragonfly BSD on x86-64 (“-t db64”)
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<br> OpenIndiana on x86-32 (“-t oind”)
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<br> OpenIndiana on x86-64 (“-t oi64”)
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<br> Linux on ARM (“-t larm”)
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<br> Linux on SPARC (“-t lspr”)
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<br> Minix 3.2 ("-t minx")
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</p>
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</blockquote>
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<p> These ports adapt the same X Window code as the Linux port,
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and should have the same functionality, except currently not
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sound for some. The x86-64 versions are currently slower, for lack
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of assembly language tweaking, and should not be used
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if the x86-32 versions will work. </p>
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<p> * The X versions can now play sound using the
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Open Sound System (OSS) API. (Usually using compatible implementations
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on each operating system, rather than the official OSS itself.)
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Sound is now enabled by default on FreeBSD and NetBSD. Sound
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compiles without problems
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(using “<a href="../options.html#option_sound">-sound 1</a>”)
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on Dragonfly BSD and OpenIndiana,
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but I have not been able to test on these yet. Getting
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sound on Dragonfly BSD seems to require some manual
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setting up. OpenIndiana doesn't seem to produce any
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sound at all in VMware Fusion. Sound also compiles without
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problems on OpenBSD, but it doesn't work - setting the
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desired sample rate fails. Minix doesn't really seem to
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support sound yet. It is also possible to use the
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OSS API on Linux, using the new
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“<a href="../develop.html#option_snd_api">-snd-api</a>”
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build system option.
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</p>
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<p> * The X versions now will try to look in the folder
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contain the application for the ROM image, like the
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Macintosh and Windows version do.
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(And also for disk1.dsk and so on files.)
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If the application
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directory can not be determined, the current directory is used
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as before. This is implemented for Linux, FreeBSD, NetBSD,
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Dragonfly BSD, and OpenIndiana, but not OpenBSD and Minix.
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</p>
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<p> * The X versions now have a new
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<a href="../control.html#command_line">command line</a> option
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“-d [directory_path]”, in which [directory_path] is used
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instead of the application directory when looking for
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the ROM image, and disk1.dsk and so on files.
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</p>
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<p> * The X versions now have a new
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<a href="../control.html#command_line">command line</a> option
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“-n [app_name]”, in which [app_name] is used
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instead of the application name for the title of the
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Mini vMac window.
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</p>
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<p> * The X versions now supports a central ROM folder like the
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Macintosh and Windows versions have. If
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“~/.gryphel/mnvm_rom” exists,
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Mini vMac will look there for the ROM image.
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If it isn't there, it will look in the application directory.
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(And the -r command line option will override both.) </p>
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<p> <a name="modified"> <b> Changed behavior in default compile </b> </a> </p>
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<!--
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<p> * None Yet. </p>
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-->
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<p> * Drawing the emulated screen to the real screen is more
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efficient. When the color depth is 4 bits or less, rather
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than converting each pixel, there is a table with 256 entries
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for converting one byte at a time. It is also more careful
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about only converting pixels in the rectangle bounding the
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changed area, rather than the entire screen.
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</p>
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<p> * The Linux version dynamically loads the ALSA library to play sound,
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so that Mini vMac will still run, without sound, even if ALSA is not
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installed. (This technique was seen in SDL.)
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So by default the Linux version is now compiled with sound,
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matching the Mac and Windows versions. </p>
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<p> * In the Linux version, when playing sound with ALSA,
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snd_pcm_delay is no longer called. The delay until
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a sample is played is not really relevant. What
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Mini vMac needs to know is time to buffer underrun.
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So Mini vMac now looks at buffer size minus the
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available space in the buffer, which may be more useful,
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for the purpose of preventing buffer underrun while
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minimizing latency.
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</p>
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<p> * The X versions now use advisory locking to refuse to open
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for writing a disk image that has been opened for writing by another
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copy of Mini vMac. Previously, the X versions of Mini vMac could
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open an already opened disk image, likely corrupting the image. If
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Mini vMac can only open a disk image read only, such
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as because the user has locked the file, then the
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advisory lock is not used, and multiple copies of Mini vMac
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can use it. </p>
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<p> * The X versions now try to use the application name to
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set the title of its window, like the Macintosh and Windows
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versions have. (If the application name can not be determined,
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“Mini vMac” is used as before.) This is found at the
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same time as the application directory, and is implemented
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for the same operating systems.
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</p>
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<p> * Command line arguments are now scanned before
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looking for disk1.dsk and so on files. This is
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necessary for the new “-d” option to
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work, and has the side effect that if disk images
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are specified on the command line, they will be
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opened first. If there are images on the command
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line, Mini vMac will now not bother to look for
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disk1.dsk at all. </p>
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<p> * The “-l” (or “/l” on Windows)
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command line option is removed. The
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“<a href="../options.html#option_speed">-speed z</a>”
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option to the build system should be used instead.
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The command line option was from before
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the build system existed, and the decision made
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to favor build time options over run time options.
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</p>
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<p> <a name="bugs"> <b> Bug fixes in default compile </b> </a> </p>
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<!--
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<p> * None Yet. </p>
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-->
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<p> * The Windows version now maps the Enter key on the numeric keypad
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to the Macintosh Enter key. It can now distinguish that key from
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the Enter key on the main keyboard, which is mapped to the Macintosh
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Return Key. There was previously no way to type the Macintosh Enter key.
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Thanks to “Alex” for pointing out this issue.
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</p>
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<p> * In the Windows version, in Full Screen Mode, the check
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for whether a key down event is an autorepeated key is
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incorrect. So potentially keys could have been ignored when
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they shouldn't have been. I've removed the check, since it isn't
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clear how to do so correctly (when using a "low level keyboard
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hook"). This doesn't affect Macintosh emulation, since there is
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an additional check for redundant events. It can affect the
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Control mode, such as when holding down Control-M.
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</p>
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<p> * The Windows version now responds
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to the WM_QUERYENDSESSION message, so that if you try
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to shut down your computer with Mini vMac running
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(with mounted disk images), then Mini vMac will complain
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and stop the shut down. </p>
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<p> * In the Linux version, using ALSA to play sound,
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snd_pcm_start was called before putting any sound
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samples in the ALSA buffer. This could cause stuttering
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at the beginning, or according to one report, prevent
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sound from working at all. Mini vMac now waits
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until its private buffer is full, then transfers as much as
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will fit into the ALSA buffer, and then starts sound playing.
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</p>
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<p> * When the Linux version is compiled for ARM,
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it includes a check that the result of
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snd_pcm_avail_update looks reasonable, and if
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not calls snd_pcm_status_get_avail instead. This
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works around what appears to be a bug in Raspbian
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for the Raspberry Pi. </p>
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<p> * The emulated clock was not properly initialized,
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and was only correct after the first “second” interrupt. </p>
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<p> * If the emulated screen is too big to fit on the real screen
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(when autoscroll is available), if the area of the emulated screen
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that has changed doesn't intersect the visible area of the emulated
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screen, then an invalid rectangle was used for drawing.
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I discovered this when trying out Vector Linux 7, which seems to
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have some extra debugging checks. </p>
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<p> * In unlikely circumstances, in Full Screen Mode, autoscroll
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may not scroll to show the last row of pixels at the bottom
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or the last column of pixels on the right. </p>
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<p> * If the host computer is not fast enough for Mini vMac
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to run at 1x speeds, then Mini vMac would not run smoothly,
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pausing for a few seconds periodically. The test for this
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situation was incorrect, and a one byte counter would overflow.
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(Have such counters as small as possible makes it easier
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to detect bugs like this.)
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</p>
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<p> * In X Window versions of Mini vMac, when using the Mini vMac
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extension to create a file on the host system,
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such as with <a href="../extras/exportfl/index.html">ExportFl</a>,
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a save dialog is not implemented. Previously the file would simply be
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created in the application directory with the asked for
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name. This was not safe, at worst it allows a program
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running in Mini vMac to replace the Mini vMac application.
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So now files will instead be created in a folder
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named "output" in the directory containing the application.
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This folder will be created if it does not exist. </p>
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<p> * In the Microsoft Windows version, if a path to a disk
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image is passed to Mini vMac on the command line that is
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longer than is legal for a path, a buffer overflow results.
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</p>
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<p> * The Windows CE version suffered bit rot. It now compiles
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and at least works on the Microsoft Device Emulator with
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Windows Mobile Version 5.0. I have no idea if it works on
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real hardware. Does anyone care? (Windows Mobile was
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discontinued and replaced by Windows Phone.)
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This port was starting to interfere with maintaining the
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main Windows version, and the choice was to remove it
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entirely or make it maintainable.
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</p>
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<p> <a name="compile_feature"> <b> New features not in default compile </b> </a> </p>
|
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<!--
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<p> * None Yet. </p>
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-->
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<p> * The new build system option
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“<a href="../options.html#option_lt">-lt</a>”
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enables
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<a href="http://mfort.net/Mini_vMac_LT/Mini_vMac_LT.html">Mike Fort's</a>
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LocalTalk emulation. The are currently some limitations.
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It is only implemented for OS X. It requires running the command
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“sudo chmod ugo+rw /dev/bpf*” to allow Mini vMac (and everyone else)
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access to all network traffic. The “-lt” option also cause Mini vMac
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to run in the background by default, because Mini vMac can't be a proper
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LocalTalk node if it isn't running. And you need to manually turn on
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AppleTalk in the chooser - I can set the PRAM flags to boot with
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AppleTalk already on, but it doesn't work properly.
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</p>
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<p> * A new build system option
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“<a href="../options.html#option_lang">-lang pol</a>”
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selects a Polish translation of the user interface by
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Przemysław Buczkowski.
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</p>
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<p> * The X versions have initial support for color
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(for Mac II emulation). The X Version so far only supports 24 bit “TrueColor”,
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and has a few other limitations on format. I doubt that anything besides TrueColor
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is used on modern machines, and so probably won't support the other options.
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Other depths such as 15, 16, and 32 bits may be used, and so probably should
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be supported, if I can find a way to test them.
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</p>
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<p> * A new build system option
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“<a href="../options.html#option_magnify">-mf</a>”
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allows changing magnification from the default 2.
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For example, “-mf 3” sets the magnification to 3.
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The option “-mf 1” disables
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magnification (removing the Control-M command). The
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magnification factor must be an integer. </p>
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<p> <a name="compile_modified"> <b> Changed behavior not in default compile </b> </a> </p>
|
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<!--
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<p> * None Yet. </p>
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-->
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<p> * The default color depth for Mac II emulation is
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“<a href="../options.html#option_depth">-depth 3</a>”
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instead of
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“-depth 0”. </p>
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<p> * For Macintosh II emulation, AutoSlow is now disabled by default
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“<a href="../options.html#option_speed">-as 0</a>”.
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AutoSlow may need some further tuning to work well with
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Mac II emulation. </p>
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<p> * In the X versions, the results of fwrite and fread on disk images
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are now checked for errors, which stops compiler warnings in recent Ubuntu. </p>
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<p> <a name="compile_bugs"> <b> Bug fixes not in default compile </b> </a> </p>
|
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<!--
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<p> * None Yet. </p>
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-->
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<p> * Fixed a bug in the DIVS.L instruction reported by
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“AP”.
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(A 68020 instruction used in Mac II emulation.)
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</p>
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<p> * Fixed the BFFFO instruction, which was completely
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broken, as reported by “AP”.
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(Another 68020 instruction used in Mac II emulation.) </p>
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<p> * Bit field operations on a register now use rotate
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rather than shift. The selected bits can be non contiguous,
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as pointed out by “AP”,
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and confirmed by the documentation.
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(Bit operations fields were added in the 68020.) </p>
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<p> * Bit field operations on memory now try to only
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operate on as many bytes as needed. Previously it
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always operated on 5 bytes, which could have undesirable
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effects if operating on a memory mapped device, as
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pointed out by “AP”. </p>
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<p> * The “MoveP.L <ea>, Dn” instruction mixed
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up the order of shifting and masking, and so was
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completely broken, as reported by “AP”.</p>
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<p> * The hack that allows extra large amounts of Video RAM
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in the Macintosh II emulation
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wasn't working properly because an array used for address
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space translation in the CPU emulation wasn't allocated
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large enough. Now the build system chooses the allocation
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size. (This problem was observed for 1024x768 with millions
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of colors.) Further detail:
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Each NuBus card gets only 1M of address space when the
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computer is in 24 bit mode. And a Mac II seems to usually
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draw in 24 bit mode. When more Video RAM is needed for the
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requested compile time options, Mini vMac uses address
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space from adjacent NuBus slots. </p>
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<p> * Fixed
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“<a href="../options.html#option_min_extn">-min-extn</a>”
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build option in the Linux version. </p>
|
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|
<!--
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<p> * Improved FPU emulation, originally written for Mini vMac
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by Ross Martin. This code was modified to
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use SoftFloat, by John Hauser (as found used in the Bochs emulator),
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plus some extensions to SoftFloat by Stanislav Shwartsman
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(also found in Bochs).
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Though using SoftFloat is slower than using native floating point,
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it ensures consistent results on different computers,
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and makes it easier to compile with different development environments.
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There's still a lot of work to do on the FPU emulation, but it already
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allows much more software for the Mac II to run without crashing.
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</p>
|
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-->
|
|
|
|
<p> <a name="build"> <b> Build System </b> </a> </p>
|
|
|
|
<!--
|
|
<p> * None Yet. </p>
|
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-->
|
|
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<p> * Added build system option
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“<a href="../develop.html#option_api">-api cco</a>”
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to use Apple's Cocoa API for OS X rather than the
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deprecated Carbon API. But the Cocoa port of Mini vMac
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is not yet considered quite ready to be officially supported,
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and so the Carbon version is still used. </p>
|
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<p> * Added build system option
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“<a href="../develop.html#option_api">-api sdl</a>”
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to use the
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<a href="http://www.libsdl.org">Simple DirectMedia Layer</a>
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1.2 API. This was added as a stepping stone to the Cocoa port - by
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combining the source code for SDL with the source code for
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an SDL port of Mini vMac, and then removing everything not
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needed, and then a lot of cleaning up until an initial
|
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native Cocoa port emerged. However the SDL port can
|
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be used as is to port to other platforms supported by
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SDL. But this is not (yet) officially supported. </p>
|
|
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<p> * Added build system option
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“<a href="../develop.html#option_t">-t mx64</a>”
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for Apple's X11 implementation
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on x86-64. (Previously x86-32 and PowerPC were supported.) </p>
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<p> * Added build system option
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“<a href="../develop.html#option_e">-t cygw</a>”
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for Cygwin/X for Microsoft Windows.
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Cygwin can also be used to compile the regular Microsoft Windows version
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with “-t wx86 -e cyg”. </p>
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<p> * Added build system option
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“<a href="../develop.html#option_t">-t irix</a>”
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for IRIX by Silicon Graphics, Inc., thanks
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to <a href="http://www.ripserve.com/perkins/">John Perkins</a>. </p>
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<p> * MinGW can be used to compile Mini vMac with build system
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option
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“-t wx86 <a href="../develop.html#option_e">-e mgw</a>”.
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Since Bloodshed Dev-C++ is based on MinGW,
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“-t wx86 -e dvc -cl” would previously give similar results.
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</p>
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<p> * Changed order of arguments to the link command when building
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the Linux version. It turns out there is a conventional order for
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how libraries should be specified, which I didn't know since I hadn't
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come a across a linker that cared until Ubuntu 11.10. </p>
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<p> * The build system should now work properly in other emulators
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|
such as SheepShaver. It was anonymously reported that the build system
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would crash emulators. The test for whether the build system was running
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in Mini vMac (so that the resulting archive may be exported to the host)
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was not good enough. </p>
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<p> * The build system now suppresses warning messages
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that were generated when compiling the Macintosh II emulation
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with Microsoft Visual C++, thanks to a report from William Grana.
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</p>
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<p> : </p>
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<p> If you find Mini vMac useful, please consider
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<a href="https://www.gryphel.com/c/help/index.html">helping the Gryphel Project</A>,
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of which it is a part. </p>
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<a href="https://www.gryphel.com/index.html">
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<img src="https://www.gryphel.com/d/gryphel-32.gif" width=32 height=32 border=0
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alt="gryphel logo, 1K"
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>
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</a>
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<p> Back up to - <b><a href="index.html">Changes in Mini vMac versions</a></b></p>
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<hr>
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<div>
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<i> <a href="https://www.gryphel.com/index.html">www.gryphel.com</a>/c/<a href="../index.html">minivmac</a>/<a href="index.html">change</a>/v3.3
|
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- <a href="https://www.gryphel.com/c/feedback.html">feedback</a> </i>
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<br>
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copyright (c) 2013 Paul C. Pratt - last update 12/19/2013
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</div>
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</body>
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</html>
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