htmlc (same encryption as romc)

[TeridaxXD001]

I don't expect any help to come, but here we go. I've come to a standstill in my Virtual Console ripping project. The manuals for the Nintendo 64 games, beginning with Mario Golf, got an extra layer of encryption. It's the same type that the ROM itself uses, which can be decrypted with the romc utility, but romc ONLY works with the rom, it detects a size of 0 when used on the manual and the result is an empty 0 KB file. The romchu utility can decrypt the manual, but the romc decryption has two types, and it only works with type 2 (the utility simply called romc works with type 1, but, again, only with the ROM).

Please, please help. This feels like a stupid reason for me to give up.