Thread: ACA500 tested
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Old 06 December 2013, 22:15   #66
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Join Date: Nov 2010
Location: Sweden
Posts: 313
Originally Posted by Schoenfeld View Post
[/B]ChipMap can map trapdoor memory as Chipram without having to open the computer, solder on jumpers etc. The following preconditions must apply:

- ECS Agnus must be installed
- exactly 512k trapdoor mem must be present (not more, not less)
- exactly 512k chipram must be present

If these conditions apply, the ACA500's minimal MMU can turn the computer into a 1MByte Chipram computer, completely without opening the machine. Most Rev.6 and higher boards have that config, so it'll improve WHDload compatibility even more.

I will publish this firmware later this weekend. It will show if the feature is available, and let you select the chipmem size with a menu item in the expert menu.

So 516888 bytes of trapdoor mem isn't enough I guess. It should be 524288 bytes (512 x 1024)?
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