Subject: Re: [stella] AtariVox EEPROM file format From: "Eckhard Stolberg" <Eckhard_Stolberg@xxxxxx> Date: Tue, 30 Nov 2004 22:09:26 +0100 |
I would really prefer to reduce the number of characters to just 37. Just letters, numbers, and an underscore. Minimize the amount of ROM used for character data / translation table.
That sounds good to me. For displaying 11 characters in a line, most people might want to go with a 3x5 font, where it would be difficult to make all ASCII characters easily identifiable anyway. So only using upper case letters and numbers (plus the underscore) would be enough.
But then we have to agee on how we want to handle "undefined" characters with an index value above 36. Do we subtract 37 until it fits into our character list? Or do we display it as a blank or an empty box, like Windows does with characters that are not available in the selected font? Or what would you suggest?
I'd prefer to use the extra 128 bytes of the 16K to go ahead and have 3 letter extensions.
I don't think three letter extensions would be really nessessary, but if you already have come up with a good one for your music files, I could live with them. ;-)
BTW, since the AtariVox has a mostly unused system settings area in the staticly allocated part of the EEPROM, I was wondering if it might be a good idea to use 16 bytes there to mark all the used blocks in the file area. Do you think something like that would be helpfull, or would it be just some unused feature, that needs to be kept in sync by the games that write to the file area?
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