On Tue, 17 Apr 2001, Ruud Baltissen wrote: > To be honnest, I didn't understand the explanation of UMAX, maybe partly > because I have no idea how you initialize this mode. Connect the -GAME line on the cartridge port to ground. When -GAME=L and -EXROM=H, the UltiMax mode is enabled. Get the C64 PLA equations from FUNET and see how the mode works. If you have a C128, you can enable the UltiMax purely with software. By the way, I don't think that -CASRAM goes active in the UltiMax mode for addresses above $1000. Therefore, no writes to $1000-$ffff should go to RAM. Another peculiarity of the UltiMax mode is that -ROML or -ROMH (I forgot which) is mapped to video reads from $2000-$3fff (or half of it; see the PLA equations yourself). Marko - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail firstname.lastname@example.org.
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