Den Mon, 5 Mar 2018 21:37:23 +0000 (UTC) skrev Steve Gray <sjgray@rogers.com>: > There was a 24K ram cart for the CBM-II series. It adds 24K into bank > 15. I wonder if the P500 could use that ram for graphics/sprites? Well, apart from the color ram with it's special access, it seems like the 1k sram is the only thing VIC-II can see that resides in bank 15. I really don't understand why this sram is there at all instead of just map a part of the 64k dram in bank 0 as a 1k window in bank 15. > IMHO, Commodore should have fully populated BANK 15 with 64K ram and > made it possible to bank out the ROMs as the C64 does. This would > have made the machines 100 times more useful and would have allowed > large programs to run without all the overhead required to access > kernal routines from other banks. Steve Someone who were any good with software should had pulled some emergency break before they actually sent the 6509 into production :) What they could had done is fill all non-rom non-i/o parts of bank 15 with a mirror of bank 0. -- (\_/) Copy the bunny to your mails to help (O.o) him achieve world domination. (> <) Come join the dark side. /_|_\ We have cookies. Message was sent through the cbm-hackers mailing listReceived on 2018-03-06 21:00:02
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