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Corrections: slot_C3_rom_ works the other way around; 80STORE doesn't affect most of RAM but does always affect the text screen.

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Also factored out `set_zero_page_paging` for consistency.
This commit is contained in:
Thomas Harte 2018-07-30 19:54:25 -04:00
parent 5aa0b17720
commit ecb26e3281
1 changed files with 34 additions and 27 deletions
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61
Machines/AppleII/AppleII.cpp
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@ -203,36 +203,46 @@ template <bool is_iie> class ConcreteMachine:
for(int c = 0xc1; c < 0xd0; ++c) {
read_pages_[c] = internal_CX_rom_ ? &rom_[static_cast<size_t>(c << 8) - 0xc100] : nullptr;
}
if(slot_C3_rom_) read_pages_[0xc3] = &rom_[0xc300 - 0xc100];
if(!internal_CX_rom_) {
if(!slot_C3_rom_) read_pages_[0xc3] = &rom_[0xc300 - 0xc100];
}
}
// MARK - The IIe's auxiliary RAM controls.
bool alternative_zero_page_ = false;
void set_zero_page_paging() {
if(alternative_zero_page_) {
read_pages_[0] = aux_ram_;
} else {
read_pages_[0] = ram_;
}
read_pages_[1] = read_pages_[0] + 256;
write_pages_[0] = read_pages_[0];
write_pages_[1] = read_pages_[1];
}
bool read_auxiliary_memory_ = false;
bool write_auxiliary_memory_ = false;
void set_main_paging() {
printf("80store: %d; page2:%d; rdaux: %d; wraux:%d\n", video_->get_80_store(), video_->get_page2(), read_auxiliary_memory_, write_auxiliary_memory_);
bool store_80 = video_->get_80_store();
for(int target = 0x02; target < 0xc0; ++target) {
write_pages_[target] = !store_80 && write_auxiliary_memory_ ? &aux_ram_[target << 8] : &ram_[target << 8];
read_pages_[target] = !store_80 && read_auxiliary_memory_ ? &aux_ram_[target << 8] : &ram_[target << 8];
read_pages_[target] = read_auxiliary_memory_ ? &aux_ram_[target << 8] : &ram_[target << 8];
write_pages_[target] = write_auxiliary_memory_ ? &aux_ram_[target << 8] : &ram_[target << 8];
}
if(store_80) {
int start_page, end_page;
if(video_->get_text()) {
start_page = 0x4;
end_page = 0x8;
} else {
start_page = 0x10;
end_page = 0x20;
if(video_->get_80_store()) {
bool use_aux_ram = video_->get_page2();
for(int target = 0x04; target < 0x08; ++target) {
read_pages_[target] = use_aux_ram ? &aux_ram_[target << 8] : &ram_[target << 8];
write_pages_[target] = use_aux_ram ? &aux_ram_[target << 8] : &ram_[target << 8];
}
bool use_aux_ram = video_->get_page2();
for(int target = start_page; target < end_page; ++target) {
write_pages_[target] = use_aux_ram ? &aux_ram_[target << 8] : &ram_[target << 8];
read_pages_[target] = use_aux_ram ? &aux_ram_[target << 8] : &ram_[target << 8];
if(!video_->get_text()) {
for(int target = 0x10; target < 0x20; ++target) {
read_pages_[target] = use_aux_ram ? &aux_ram_[target << 8] : &ram_[target << 8];
write_pages_[target] = use_aux_ram ? &aux_ram_[target << 8] : &ram_[target << 8];
}
}
}
}
@ -630,14 +640,7 @@ template <bool is_iie> class ConcreteMachine:
// The alternative zero page setting affects both bank 0 and any RAM
// that's paged as though it were on a language card.
alternative_zero_page_ = !!(address&1);
if(alternative_zero_page_) {
read_pages_[0] = aux_ram_;
} else {
read_pages_[0] = ram_;
}
read_pages_[1] = read_pages_[0] + 256;
write_pages_[0] = read_pages_[0];
write_pages_[1] = read_pages_[1];
set_zero_page_paging();
set_language_card_paging();
break;
}
@ -658,8 +661,12 @@ template <bool is_iie> class ConcreteMachine:
} break;
/* Read-write switches. */
case 0xc050: update_video(); video_->set_text(false); break;
case 0xc051: update_video(); video_->set_text(true); break;
case 0xc050:
case 0xc051:
update_video();
video_->set_text(!!(address&1));
set_main_paging();
break;
case 0xc052: update_video(); video_->set_mixed(false); break;
case 0xc053: update_video(); video_->set_mixed(true); break;
case 0xc054: