From: David Wood (jbevren_at_starbase.globalpc.net)
Date: 2003-06-20 05:41:18
Is ISO9660 too bloated? It seems to me that what you're setting up is media that's intended to be written once and read many times (WORM), not write-only, which is never intended to be read again (WORN, a joke from the old 8bit atari days). Anyway, the ISOfs I suspect is fairly simple aside from its relatively large pointers. Have a look. There's even space in the header for a generous-sized bootblock ;-) . o O ( mkisofs games/vic20/*.rom >vic20 ) -jbev On Thu, 19 Jun 2003, Marko [iso-8859-1] Mäkelä wrote: > Good news everyone: the prototype of the combined 32 kB SRAM and 4 MB Flash ROM > cartridge for the VIC-20 works. In principle, it's the same design that we > already had two years ago, but there have been various practical problems. > This prototype uses three chips: 62256 SRAM, Am29F032B flash and Lattice 1016 > programmable logic. > > The menu software I wrote over two years ago supports one directory only. > I thought that it'd be nice to have subdirectories, since it is a bit hard > to keep track of 4 megabytes of compressed data. I have an idea how the > subdirectories could be implemented without wasting a lot of space, but I'd > also look for existing solutions. > > The Am29F032B has 64-kilobyte sectors, but I wouldn't be making use of the > "sector erase" feature. With a 38,400 bps C2N232 connection, the entire > flash can be reprogrammed in less than 20 minutes. > > I'd interleave the directory entries with the data (like in the archiving > programs lha and tar) and provide each entry with links to the next and > previous entry. The data would be aligned on a byte boundary. The last > entry would have a link $ffffff, so that new files can be appended without > reprogramming the entire flash. Also files could be deleted by programming > some "file type" bits to all zero. > > Does anyone have some write-only file system code that I could use? I'm > going to release the design and all program code under the GNU General > Public License. Assembled and tested devices will hopefully be available > by September or October for 50 to 60 EUR a piece. > > Marko > > Message was sent through the cbm-hackers mailing list > Message was sent through the cbm-hackers mailing list
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