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43 lines
1.3 KiB
Markdown
43 lines
1.3 KiB
Markdown
Disk: TRS-80
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============
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The TRS-80 models I, III and IV (but not the II, 100, 2000, Colour Computer
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or Pocket Computer) was a popular line of Z80-based home computers made by
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Tandy Corporation and sold by Radio Shack. There were some of the first
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generation of domestic micromputers, with the Model I released in 1978.
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There were a myriad of different floppy disk interfaces, some produced by
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Tandy and some by third parties, using all the various combinations of 40-
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and 80-track, FM, MFM, etc.
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Luckily the encoding scheme was mostly compatible with the IBM scheme, with a
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few minor variations: when using FM encoding, the TRS-80 wrote the sectors on
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track 17 (where the directory was) with a non-standard DAM byte.
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FluxEngine's IBM reader can handle TRS-80 disks natively.
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Reading discs
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-------------
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Just do:
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```
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fluxengine read ibm -o trs80.jv3
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```
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You should end up with an `trs80.jv3` of the appropriate size. It's a simple
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array of sectors in JV3 format.
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If you've got a 40-track disk, use `--cylinders=0-79x2`.
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If you've got a single density disk, use
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`--decoder.ibm.trackdata.read_fm=true`. (Double density is the default.)
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Useful references
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-----------------
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- [The JV3 file format](https://www.tim-mann.org/trs80/dskspec.html):
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documents the most popular emulator disk image.
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