ShuriZma
/
stella
mirror of https://github.com/stella-emu/stella.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

NUSIZ player improvements. 

Match NUSIZ during draw / decode and hblank to hardware behavior.
This commit is contained in:
Christian Speckner 2017-03-10 09:17:11 +01:00
parent 2057b1421c
commit 4a71e48a07
1 changed files with 15 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
src/emucore/tia/Player.cxx
View File

@ -109,21 +109,30 @@ void Player::nusiz(uInt8 value, bool hblank)
// decode and rendering.
if (myIsRendering) {
Int8 delta = myRenderCounter - Count::renderCounterOffset;
switch ((myDivider << 4) | myDividerPending) {
case 0x12:
case 0x14:
if ((myRenderCounter - Count::renderCounterOffset) < 3)
setDivider(myDividerPending);
else
myDividerChangeCounter = 1;
if (hblank) {
if (delta < 4)
setDivider(myDividerPending);
else
myDividerChangeCounter = (delta < 5 ? 1 : 0);
} else {
if (delta < 3)
setDivider(myDividerPending);
else
myDividerChangeCounter = 1;
}
break;
case 0x21:
case 0x41:
if ((myRenderCounter - Count::renderCounterOffset) < (hblank ? 4 : 3)) {
if (delta < (hblank ? 4 : 3)) {
setDivider(myDividerPending);
} else if ((myRenderCounter - Count::renderCounterOffset) < (hblank ? 6 : 5)) {
} else if (delta < (hblank ? 6 : 5)) {
setDivider(myDividerPending);
myRenderCounter--;
} else {