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CD audio and disk image stuff

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RichardG867
2021-07-29 19:58:16 -03:00
parent a517093d9a
commit 9759ee072d
2 changed files with 29 additions and 19 deletions
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46
hardware/diskimages.rst
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@@ -23,26 +23,36 @@ Supported formats:
|Virtual Hard Disk|.vhd |
+-----------------+--------------+
\* Raw images come in many extensions, including .img and .ima
\* Raw image extensions recognized by 86Box include: .hdd .ima .img
Hard disk size limits
^^^^^^^^^^^^^^^^^^^^^
There are limits to how big of a hard disk an emulated machine can accept. Such limits will vary depending on the machine's age. Here are a few important ones:
There are limits to how big of a hard disk an emulated machine can accept. Such limits will vary depending on the machine's BIOS. The table below lists all important limits applicable to the IDE bus:
+---------------+---------+---------+-----+-------+
|Limit |Disk size|Cylinders|Heads|Sectors|
+===============+=========+=========+=====+=======+
|20-bit CHS |504 MB |1024 |16 |63 |
+---------------+---------+---------+-----+-------+
|Extended CHS |8032 MB |1024 |256 |63 |
+---------------+---------+---------+-----+-------+
|65535 cylinders|32255 MB |65535 |16 |63 |
+---------------+---------+---------+-----+-------+
|48-bit LBA |131071 MB|Not applicable |
+---------------+---------+-----------------------+
+----------------+---------+---------+-----+-------+
|Limit |Disk size|Cylinders|Heads|Sectors|
+================+=========+=========+=====+=======+
|20-bit CHS |504 MB |1024 |16 |63 |
+----------------+---------+---------+-----+-------+
|12-bit cylinder |2015 MB |4095 |16 |63 |
+----------------+---------+---------+-----+-------+
|ECHS translation|4032 MB |1024 |128 |63 |
+----------------+---------+---------+-----+-------+
|Revised ECHS |7560 MB |1024 |240 |63 |
+----------------+---------+---------+-----+-------+
|LBA translation |8032 MB |1024 |255 |63 |
+----------------+---------+---------+-----+-------+
|16-bit cylinder |32255 MB |65535 |16 |63 |
+----------------+---------+---------+-----+-------+
|28-bit CHS |130558 MB|65535 |255 |63 |
+----------------+---------+---------+-----+-------+
|86Box |131071 MB|Not applicable |
+----------------+---------+-----------------------+
These limits can be worked around (with caveats) by using software such as *Ontrack Disk Manager*, except for the 131071 MB one, which is a hard limit of 86Box's hard disk emulation.
The maximum supported disk image size for IDE or SCSI is
Disk overlay software such as *Ontrack Disk Manager* can work around BIOS limits and allow booting of hard drives within the 86Box limit of 131071 MB, with the same caveats as using such software on a real machine.
Floppy disk images
------------------
@@ -75,7 +85,7 @@ Supported formats:
|Teledisk |.td0 |
+--------------------+--------------+
\* Raw images come in many extensions; the following ones are recognized by 86Box: .001 .002 .003 .004 .005 .006 .007 .008 .009 .010 .12 .144 .360 .720 .bin .dsk .flp .hdm .ima .img .vfd .xdf
\* Raw image extensions recognized by 86Box include: .bin .dsk .flp .hdm .ima .img .vfd .xdf
Floppy disk detection
^^^^^^^^^^^^^^^^^^^^^
@@ -86,7 +96,7 @@ Floppy disk detection
2. `DOS BIOS Parameter Block <https://en.wikipedia.org/wiki/BIOS_parameter_block>`_ data within the image;
3. If all else fails, a guess is made based on the image file's size.
The BIOS Parameter Block detection method may behave incorrectly with non-DOS floppy disks. Installation floppies for UNIX and Linux are common examples of non-DOS disks. Disabling :ref:`Check BPB <settings/floppycdrom:Floppy drives>` is strongly recommended for accessing these, as an inaccurate BPB detection may result in read errors, data corruption and other issues.
The BIOS Parameter Block detection method may behave incorrectly with non-DOS floppy disks. Installation floppies for UNIX and Linux are common examples of non-DOS disks. Disabling :ref:`Check BPB <settings/floppycdrom:Floppy drives>` is strongly recommended when accessing these, as an inaccurate BPB detection may result in read errors, data corruption and other issues.
.. note:: When using a **Raw** image of a non-DOS floppy with Check BPB disabled, make sure the image file is not truncated (smaller than its media size), otherwise incorrect behavior may still occur.
@@ -105,7 +115,7 @@ Supported formats:
| |.zdi (ZIP) |
+---------------------+--------------+
\* Raw images come in many extensions, including: img ima
\* Raw image extensions recognized by 86Box include: .ima .img
CD-ROM / DVD-ROM optical disc images
------------------------------------
@@ -123,6 +133,6 @@ Supported formats:
CD audio
^^^^^^^^
Compact Disc Digital Audio (CDDA) playback through the emulated CD-ROM drive is supported on **Cue sheet** images. Audio output is muted on all drives by default; it can be unmuted by unchecking the *Mute* option for the respective drive on the :ref:`status bar <usage/statusbar:|cdrom| |nbsp| CD-ROM drives>` or :ref:`Media menu <usage/menubar:Media>`.
Compact Disc Digital Audio (CDDA) playback through the emulated CD-ROM drives is supported on **Cue sheet** images. Audio output is unmuted on the first CD-ROM drive and muted on subsequent drives by default; individual drives can be muted or unmuted through the :ref:`status bar <usage/statusbar:|cdrom| |nbsp| CD-ROM drives>` or :ref:`Media menu <usage/menubar:Media>`.
.. note:: Only raw format (.bin) tracks are supported. Compressed or otherwise encapsulated audio tracks (.wav, .mp3, .ogg, .flac and other formats) are not supported.

2
usage/statusbar.rst
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@@ -38,7 +38,7 @@ A 3.5" or 5.25" floppy icon will appear for each configured :ref:`floppy drive <
A CD icon will appear for each configured :ref:`CD-ROM drive <settings/floppycdrom:CD-ROM drives>`.
* **Mute:** mute any :ref:`hardware/diskimages:CD audio` played through this drive's analog output.
* **Mute:** mute any :ref:`hardware/diskimages:CD audio` played through this drive's analog output. CD audio is unmuted by default on the first configured CD-ROM drive.
* **Empty:** remove any disc inserted into this drive.
* **Reload previous image:** reinsert the last disc image file selected through the *Image* option.
* **Image:** insert a :ref:`CD-ROM or DVD-ROM disc image file <hardware/diskimages:CD-ROM / DVD-ROM optical disc images>` into this drive.