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Please try the attached Tengu dumping script with the 4-in-1 multicart.Your YH1433 file only contains FF bytes and is unusable for determining which mapper it is or how it works. Please try dumping it as NROM (mapper #0).
Haha, I forgot to attach the script. M287.lua is for 4-in-1.Also, for X-6023, please try M227-512.lua.Does YH1433 only have the Track&Field games, or others as well? I only see a CHR bank switchin that NROM dump.
X-6023 dumped correctly, but the mapper number must be set to 380. I believe YH1433 is mapper 176. Do you already have a dumping script for mapper 176?
Attached is a mapper 212 dumping script for Tengu.
It looks similar to : 15-in-1 (GA23C8003 PCB)[p1][!] Mapper 45