Copy the kernal and Basic to the RAM under the ROMs and switch to the configuration that has only RAM and I/O. No cartridge needed. On Thu, 18 Nov 2010, Jim Brain wrote: > Given the fact that many C64 machines have non socketed KERNAL ROMs, I > continually receive requests for a KERNAL ROM cart. > > Academically, I see how to do it by driving ULTIMAX mode during $e000-$ffff > reads, but that only works when RAM is banked out. Does anyone have an ideas > on how to accomplish that? > > I know I could implement a mirror for $0 and $1, but folks say those > addresses and the R/W signal don't show on the external bus. Implementing a > complete 6510 on the cart to mirror the internal 6510 might work (discarding > write operations), but that's truly a brute force approach and hardly seems > worth the effort. > > Jim > > -- > Jim Brain, Brain Innovations (X) > brain@jbrain.com > Dabbling in WWW, Embedded Systems, Old CBM computers, and Good Times! > Home: http://www.jbrain.com > > > Message was sent through the cbm-hackers mailing list > wlevak@sdf.lonestar.org SDF Public Access UNIX System - http://sdf.lonestar.org Message was sent through the cbm-hackers mailing listReceived on 2010-11-19 19:00:09
Archive generated by hypermail 2.2.0.