Closed stefandrissen closed 5 years ago
Good point!
It should not be too difficult, the larger problem however will be #6, and until #6 is done, there is no point :-)
Actually, I think it will automatically work since:
Each 1 Mb External Memory unit is divided into 64 pages of 16k each, selected by the first 6 bits of ports 128 and 129. The most significant two bits of each port select one of the four possible 1 Mb External Memory units.
And being "good" assembly code I'm not checking any boundaries, so megabyte 1 will automatically flow over to megabyte 2 :-) You will need to configure your megabytes "normally" - ie 1,2,3,4
released - timing needs some cleaning up, but this also applies to non-megabyte...
With regards to #6 can this be expanded to multiple One Meg interfaces?