mirror of
https://github.com/TomHarte/CLK.git
synced 2024-08-16 16:28:59 +00:00
Ensures an objective copy of the bus address is kept, and forwarded to cards.
This commit is contained in:
parent
744c35b617
commit
fb4bb21bf6
@ -205,7 +205,7 @@ class ConcreteMachine:
|
|||||||
return &speaker_;
|
return &speaker_;
|
||||||
}
|
}
|
||||||
|
|
||||||
forceinline Cycles perform_bus_operation(CPU::MOS6502::BusOperation operation, uint16_t address, uint8_t *value) {
|
forceinline Cycles perform_bus_operation(const CPU::MOS6502::BusOperation operation, const uint16_t address, uint8_t *const value) {
|
||||||
++ cycles_since_video_update_;
|
++ cycles_since_video_update_;
|
||||||
++ cycles_since_card_update_;
|
++ cycles_since_card_update_;
|
||||||
cycles_since_audio_update_ += Cycles(7);
|
cycles_since_audio_update_ += Cycles(7);
|
||||||
@ -232,21 +232,22 @@ class ConcreteMachine:
|
|||||||
d000 to e000 : the low ROM area, which can contain indepdently-paged RAM with a language card
|
d000 to e000 : the low ROM area, which can contain indepdently-paged RAM with a language card
|
||||||
e000 onward : the rest of ROM, also potentially replaced with RAM by a language card
|
e000 onward : the rest of ROM, also potentially replaced with RAM by a language card
|
||||||
*/
|
*/
|
||||||
|
uint16_t accessed_address = address;
|
||||||
MemoryBlock *block = nullptr;
|
MemoryBlock *block = nullptr;
|
||||||
if(address < 0x200) block = &memory_blocks_[0];
|
if(address < 0x200) block = &memory_blocks_[0];
|
||||||
else if(address < 0xc000) {
|
else if(address < 0xc000) {
|
||||||
if(address < 0x6000 && !isReadOperation(operation)) update_video();
|
if(address < 0x6000 && !isReadOperation(operation)) update_video();
|
||||||
block = &memory_blocks_[1];
|
block = &memory_blocks_[1];
|
||||||
address -= 0x200;
|
accessed_address -= 0x200;
|
||||||
}
|
}
|
||||||
else if(address < 0xd000) block = nullptr;
|
else if(address < 0xd000) block = nullptr;
|
||||||
else if(address < 0xe000) {block = &memory_blocks_[2]; address -= 0xd000; }
|
else if(address < 0xe000) {block = &memory_blocks_[2]; accessed_address -= 0xd000; }
|
||||||
else { block = &memory_blocks_[3]; address -= 0xe000; }
|
else { block = &memory_blocks_[3]; accessed_address -= 0xe000; }
|
||||||
|
|
||||||
bool has_updated_cards = false;
|
bool has_updated_cards = false;
|
||||||
if(block) {
|
if(block) {
|
||||||
if(isReadOperation(operation)) *value = block->read_pointer[address];
|
if(isReadOperation(operation)) *value = block->read_pointer[accessed_address];
|
||||||
else if(block->write_pointer) block->write_pointer[address] = *value;
|
else if(block->write_pointer) block->write_pointer[accessed_address] = *value;
|
||||||
} else {
|
} else {
|
||||||
// Assume a vapour read unless it turns out otherwise; this is a little
|
// Assume a vapour read unless it turns out otherwise; this is a little
|
||||||
// wasteful but works for now.
|
// wasteful but works for now.
|
||||||
|
Loading…
Reference in New Issue
Block a user