6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2024-11-26 23:52:26 +00:00
Code Issues Projects Releases Wiki Activity

Fixed sprite disappearance: test should be applied predecrement, not post — it relates to the address being used this access, not the next one.

Browse Source
This commit is contained in:
Thomas Harte 2017-03-19 18:58:35 -04:00
parent 7d8d1c7828
commit 4722f6b5c4
1 changed files with 4 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
Machines/Atari2600/Cartridges/CartridgePitfall2.hpp
View File

@ -52,10 +52,9 @@ class CartridgePitfall2: public Cartridge<CartridgePitfall2> {
*value = rom_[8192 + address_for_counter(address & 7)];
break;
case 0x1010: case 0x1011: case 0x1012: case 0x1013: case 0x1014: case 0x1015: case 0x1016: case 0x1017: {
uint8_t mask = mask_[address & 7];
*value = rom_[8192 + address_for_counter(address & 7)] & mask;
} break;
case 0x1010: case 0x1011: case 0x1012: case 0x1013: case 0x1014: case 0x1015: case 0x1016: case 0x1017:
*value = rom_[8192 + address_for_counter(address & 7)] & mask_[address & 7];
break;
#pragma mark - Writes
@ -94,9 +93,9 @@ class CartridgePitfall2: public Cartridge<CartridgePitfall2> {
private:
inline uint16_t address_for_counter(int counter) {
uint16_t fetch_address = (featcher_address_[counter] & 2047) ^ 2047;
featcher_address_[counter]--;
if((featcher_address_[counter] & 0xff) == top_[counter]) mask_[counter] = 0xff;
if((featcher_address_[counter] & 0xff) == bottom_[counter]) mask_[counter] = 0x00;
featcher_address_[counter]--;
return fetch_address;
}