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ROM is never shadowed; also add assert.

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This commit is contained in:
Thomas Harte 2024-01-04 11:17:20 -05:00
parent 386f572e9a
commit 24d64bf788
1 changed files with 5 additions and 0 deletions
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5
Machines/Apple/AppleIIgs/MemoryMap.hpp
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@ -70,6 +70,11 @@ class MemoryMap {
} }
bool is_shadowed(const Region &region, uint32_t address) const { bool is_shadowed(const Region &region, uint32_t address) const {
// ROM is never shadowed.
if(!region.write) {
return false;
}
const auto physical = physical_address(region, address); const auto physical = physical_address(region, address);
assert(physical >= 0 && physical <= 0xff'ffff); assert(physical >= 0 && physical <= 0xff'ffff);
return shadow_pages_[(physical >> 10) & 127] & shadow_banks_[physical >> 17]; return shadow_pages_[(physical >> 10) & 127] & shadow_banks_[physical >> 17];