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Restores IIe ROM-over-card paging.

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This commit is contained in:
Thomas Harte 2018-07-28 13:31:25 -04:00
parent bc2afe69e1
commit c905de2e40
1 changed files with 37 additions and 34 deletions
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37
Machines/AppleII/AppleII.cpp
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@ -186,8 +186,6 @@ template <bool is_iie> class ConcreteMachine:
uint8_t *const ram = alternative_zero_page_ ? aux_ram_ : ram_;
uint8_t *const rom = is_iie ? &rom_[3840] : rom_.data();
printf("Configuring for %c%c%c [%c]\n", language_card_.read ? 'r' : '-', language_card_.write ? 'w' : '-', language_card_.bank1 ? '1' : '-', has_language_card_ ? 'c' : '-');
for(int target = 0xd0; target < 0x100; ++target) {
uint8_t *const ram_page = &ram[(target << 8) - ((target < 0xe0 && language_card_.bank1) ? 0x1000 : 0x0000)];
uint8_t *const rom_page = &rom[(target << 8) - 0xd000];
@ -201,6 +199,14 @@ template <bool is_iie> class ConcreteMachine:
bool slot_C3_rom_ = false;
// bool internal_c8_rom_ = false;
void set_card_paging() {
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];
}
// MARK - The IIe's auxiliary RAM controls.
bool alternative_zero_page_ = false;
@ -304,7 +310,7 @@ template <bool is_iie> class ConcreteMachine:
break;
case Target::Model::IIe:
rom_size += 3840;
rom_names.push_back("apple2eu.rom");
rom_names.push_back("apple2e.rom");
break;
}
const auto roms = rom_fetcher("AppleII", rom_names);
@ -333,6 +339,8 @@ template <bool is_iie> class ConcreteMachine:
for(int c = 0; c < 0xc0; ++c) {
read_pages_[c] = write_pages_[c] = &ram_[c << 8];
}
// Set the whole card area to initially backed by nothing.
for(int c = 0xc0; c < 0xd0; ++c) {
read_pages_[c] = write_pages_[c] = nullptr;
}
@ -554,9 +562,15 @@ template <bool is_iie> class ConcreteMachine:
break;
case 0xc006:
case 0xc007: internal_CX_rom_ = !!(address&1); break;
case 0xc007:
internal_CX_rom_ = !!(address&1);
set_card_paging();
break;
case 0xc00a:
case 0xc00b: slot_C3_rom_ = !!(address&1); break;
case 0xc00b:
slot_C3_rom_ = !!(address&1);
set_card_paging();
break;
case 0xc00e:
case 0xc00f: video_->set_alternative_character_set(!!(address&1)); break;
@ -667,7 +681,7 @@ template <bool is_iie> class ConcreteMachine:
if(!read_pages_[address >> 8] && address >= 0xc090 && address < 0xc800) {
// If this is a card access, figure out which card is at play before determining
// the totality of who needs messaging.
int card_number = 0;
size_t card_number = 0;
AppleII::Card::Select select = AppleII::Card::None;
if(address >= 0xc100) {
@ -677,13 +691,6 @@ template <bool is_iie> class ConcreteMachine:
*/
card_number = (address - 0xc100) >> 8;
select = AppleII::Card::Device;
// If this is a IIe then some of this space may actually be
// remapped to the internal ROM. Check out that condition and,
// if so, label this as card -1.
if(is_iie && slot_C3_rom_ && address >= 0xc300 && address < 0xc400) {
card_number = -1;
}
} else {
/*
Decode the area conventionally used by cards for registers:
@ -693,7 +700,6 @@ template <bool is_iie> class ConcreteMachine:
select = AppleII::Card::IO;
}
if(card_number >= 0) {
// If the selected card is a just-in-time card, update the just-in-time cards,
// and then message it specifically.
const bool is_read = isReadOperation(operation);
@ -712,9 +718,6 @@ template <bool is_iie> class ConcreteMachine:
is_read, address, value);
}
has_updated_cards = true;
} else {
if(isReadOperation(operation)) *value = rom_[address - 0xc100];
}
}
}