Re: C64 buses when RESET is asserted

From: Michał Pleban <*lists_at_michau.name*> Date: Mon, 08 Apr 2013 20:44:55 +0200 Message-ID: <51631027.9010701@michau.name> · lists_at_michau.name

Hello!

brain@jbrain.com wrote:

> Well, if the additional HW is not too much, I'm happy to add it to
> ROM-el.  People have asked for such a capability many times.  I think I
> ran into problems finding the correct select logic, as /OE and /CS on
> the ROMs are not active on a write cycle to those areas of memory.

Do you mean hardware for substituting SRAM for ROM? Or substituting
Flash for ROM? I have the latter done, but for the exact reasons you
mention (CS not active on write) I use a small overlay on the SID chip
to steal the R/W signal and $D600-$D7FF address space to operate the
Flash. Plus one small CPLD.

Regards,
Michau.

       Message was sent through the cbm-hackers mailing list