thank you for you help

the 6527 i found is a dip40 chip,as large as 6538

it's 'full name': umc ua6527p

i thought it should be a member of 6502 processor family

i think this is a "fc compatable" game cinsole
it was very popular in China in the early 1990s,quite a lot of companies produced similar things ,some are illegal copies.
And there was a variation,which was called "学习机"（i would like to translate it as "study machine"）,with a keyboard attached on it ...

i happened to found a game console at my friend's,
(in his trash can,it's discarded for years)
and i've been looking for the datasheet for days:

umc um6516(believed to be memory)
umc ua6538(believed to be video controller)
umc ua6527p(believed to be 8-bit controller of 6502 family)

unluckily, i ...