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

FDS: Implement 4030 bit 3 read

This commit is contained in:
TakuikaNinja 2025-04-08 16:26:58 +12:00
parent 2b8f6e7627
commit 597fa4b39c
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/fds.cpp
View File

@ -259,7 +259,13 @@ static void FDSFix(int a) {
static DECLFR(FDSRead4030) { static DECLFR(FDSRead4030) {
uint8 ret = 0; uint8 ret = 0;
/* from hardware testing (#789):
4030(r) bit 3 = 4025(w) bit 3
(nametable arrangement/mirroring)
*/
ret |= (mapperFDS_control & 0x08);
/* Cheap hack. */ /* Cheap hack. */
if (X.IRQlow & FCEU_IQEXT) ret |= 1; if (X.IRQlow & FCEU_IQEXT) ret |= 1;
if (X.IRQlow & FCEU_IQEXT2) ret |= 2; if (X.IRQlow & FCEU_IQEXT2) ret |= 2;