On 5/24/2013 4:08 PM, Spiro Trikaliotis wrote: > * On Fri, May 24, 2013 at 11:35:17AM -0700 Steve Gray wrote: > >> That reminds me of something I read about the C64GS kernel actually having >> windowing routines built in. Has anyone disassembled the kernel to verify >> it? > I do not have the disassembly here ATM (problem with the access to the > machine), but IIRC, the 64GS has a stripped-down version of the kernel. > That is, no fancy windowing routines. > > Regards > Spiro > > Message was sent through the cbm-hackers mailing list Not to take this too far off topic, but I would be interested in an idea that would allow the ROM areas to be "banked" in such a way that you could fit 16kB of KERNAL or BASIC into a 8kB space. I know the trivial is to use a "secret" location, but that's too simplistic. I was thinking of something where a sequence of address accesses would trip the bank, and then if there was an IRQ when in the wrong bank, any access to the normal locations would "trip" it back by writing to a single location. That way, accesses to ROM routines would incur no more than a few cycles to flip back to the correct bank. But, that was just the initial idea. If a solution could be found, that would open up lots of expansion ideas (You could offer many banks of stuff) within a single ROM window. Jim -- Jim Brain firstname.lastname@example.org www.jbrain.com Message was sent through the cbm-hackers mailing listReceived on 2013-05-24 22:00:50
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