Posted By
TLC
on 2022-12-25
17:21:57
|  Re: Question about a specific case of TED data bus access
@MCes the short answer is yes. The ROM mapping is independent to the TED's internal RAM/ROM mapping logic, and, when applicable, it is applied for both CPU and TED memory fetches. That is, if you tell the TED to fetch data from ROM, then it'll simply choose ROMs according to the ROM mapping register i.e. $fdd0-$fddf, and fetch data from there.
(A bit of warning, maybe not needed but anyway: while bitmask fetch is controlled by $ff12 bit 2, character pointer / graphic attribute memory fetch is not; that'd always follow $ff3e/$ff3f.)
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