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Fix PRG writes in CD Logger

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This code was added for FDS RAM, but it breaks PRG writes with normal
cartridge-based memory controllers.

The bug inappropriately resets (clears) the access mode bits previously
recorded when an MMIO register is written in PRG address space. For
instance, if an instruction is executed at $8000 and then some code
later writes to $8000, the instruction execution would have been
forgotten.
This commit is contained in:
Jay Oster
2024-09-12 15:25:00 -07:00
parent f980ec2bc7
commit 9da80206f8
1 changed files with 6 additions and 1 deletions
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src/debug.cpp
+6 -1
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@@ -569,7 +569,12 @@ void LogCDData(uint8 *opcode, uint16 A, int size)
newDataHit = true;
}
}
else
// Unclear why the write destination's access types gets reset for FDS...
// See:
// - https://github.com/TASEmulators/fceux/commit/a4fa6225a04b5ab8d3dfca3fc9abd7190bceec85
// - https://github.com/TASEmulators/fceux/commit/b10b6254c3d5c9519a85cb4382cdb22846d2e394
// - https://github.com/TASEmulators/fceux/commit/67942accc72149ae028d58f36419b64ea8651db9?diff=unified&w=1
else if(GameInfo && GameInfo->type == GIT_FDS)
{
if (cdloggerdata[j] & 1)
{