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SD structure » History » Version 3

foft, 05/27/2018 07:54 PM

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h1. SD structure
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Historically the SD card was used to load the OS roms and BASIC roms. The format was developed for the MIST (and similar devices) where there are multiple platforms.
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Essentially it expects a FAT formatted SD card (suggest 1-2GB) containing the folder structure:
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<pre>
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atari800/
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  user/
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  rom/
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</pre>
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h2. User
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Under user you can put any atrs, xex files or car files. You can use long filenames and folders to organise them.
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h2. Rom
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Under rom you no longer need to put anyway, since its stored on the flash chip. However you CAN put:
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* A bunch of OS/basic roms
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* Turbo freezer rom
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* Settings
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When the EclaireXL starts it up it loads the OS and settings from the flash. It then can override these if certain special files are present.
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h3. Special rom files
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* atarixl.rom - main OS rom
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* ataribas.rom - atari basic
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* freezer.rom - turbo freezer rom
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* settings - video and system settings 
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h4. Rom files
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If present these are loaded instead of the os and basic rom on the flash chip. This is useful to have e.g. an 'Altirra OS/basic' sd card or an  'OS B' sd card etc.
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h4. Settings
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If these are present then they are loaded in place of the settings on the flash chip. So you can for instance put in a settings file to force it to start in the specified video mode. Some example files and a program to create them can be found in here: http://www.64kib.com/autobuild/private/settings_examples/
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h3. Other rom files
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Any other files in the rom folder are ignored. You can for instance put in atariosb.rom and atariosa.rom and load these from the menu to switch rom.