RE: Hiding code from the User...
Date: 2001-04-03 06:33:58

>Ultimax mode to map into the C64. This is why it needs the extra cable
>attached to the HIRAM signal in the C64 to allow access to RAM at $e000. I
I never new it needed an extra cable (never having seen a RAMlink in the

>There once was a thread in comp.sys.cbm about this cartridge, called >"epyx
>fastload internals" or something like that. I think parts of the ROM >are
>mapped into I/O space, and accesses to I/O space trigger a circuit that
>in ROML for a certain time. After a timeout the ROM vanishes again. >Quite
tricky :-)
Indeed very tricky, I did a search for it but could find the reference. Does
anyone have this article?


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