From: Brian Ketterling (tweel8502_at_hotmail.com)
Date: 2003-03-21 01:22:12
>From: David Wood <email@example.com> > > > either the pinout above is wrong, or Viza intentionally jumbled up > > the lines (maybe as a scheme to keep people from reading/copying > > the ROM?). > > ..or they laid it out in this manner to make it easier to design the >cartridge (no crossed wires or vias, for example). Either possibility >isnt all that uncommon. Humm... so one views the cartridge as a black box? That is, it doesn't matter if externally-consecutive addresses are in fact scattered internally throughout the EPROM, so long as a unique address on the buss accesses a unique location? And the same for the order of the data bits? ( sorry if this is elementary :-) Is there some way to defeat the cartridge's autostart feature so that I can read (PEEK/LDA) and dump the EPROM? My version of Vizastar is XL4, I know someone who has XL8, I'm interested in seeing if I can upgrade mine, and he'd like to make a copy of his. Thanks, Brian _________________________________________________________________ STOP MORE SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail Message was sent through the cbm-hackers mailing list
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