bugs.
Implement basic support for parts of the apple II memory map
- 64K address space is assembled from multiple memory regions
- a memory region can optionally intercept reads and/or writes
- memory regions may be marked non-writable (this has a bug and isn't
yet working)
- execution handler can intercept execution to defined entry points
when PC enters a memory region
- can trap when PC enters a memory region to an unhandled entry point
- basic support for some IO page soft switches and status registers
- mostly just printing an event
- support loading boot1 image from sqlite DB
- load and install bits of the apple IIe ROM
- but I don't think I have got all of the important bits from the
image yet -- e.g. the CXROM image at alternate $C100 is not yet
installed
execution. This traps writes to text page 1 and reads/writes to high
memory (>$C000).
This is already sufficient to trace the execution of one of the simple
boot1 images that clears the text page (manually) and writes 'THIS DISK
HAS NO DOS TO BOOT'