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Added a fix for certain homebrews.

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This commit is contained in:
Thomas Harte 2017-03-01 07:59:25 -05:00
parent 893a5dd007
commit 93d1573481
1 changed files with 8 additions and 4 deletions
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12
Machines/Atari2600/Atari2600.cpp
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@ -274,11 +274,15 @@ void Machine::configure_as_target(const StaticAnalyser::Target &target)
offset += copy_length;
}
// On a real paged cartridge, any page may initially be visible. Various homebrew authors appear to have
// decided the last page will always be initially visible. So do that.
size_t romMask = rom_size_ - 1;
rom_pages_[0] = rom_;
rom_pages_[1] = &rom_[1024 & romMask];
rom_pages_[2] = &rom_[2048 & romMask];
rom_pages_[3] = &rom_[3072 & romMask];
uint8_t *rom_base = rom_;
if(rom_size_ > 4096) rom_base = &rom_[rom_size_ - 4096];
rom_pages_[0] = rom_base;
rom_pages_[1] = &rom_base[1024 & romMask];
rom_pages_[2] = &rom_base[2048 & romMask];
rom_pages_[3] = &rom_base[3072 & romMask];
switch(target.atari.paging_model)
{