6502.org

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 found nothing at www.datasheet.com

sorry for the probable errors in my poor english


谢谢大家

I wonder if the 6516 would be the microprocessor, and the 6527 the memory and/or I/O chip. This comes from the fact that 651x processors were typically bundled with an on-board I/O port and integernal clock generator, which is the only distinguishing factor from the 650x lineup. So, a 6516 would be (more or less) the same as a 6506, but with an integrated I/O port and internal clock generator. See also the prototype chip, the 6510, which was used as the main processor in the Commodore 64.

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,and some provided programming environment,even simple os.

6516 should not be controller,because there are two,and the 74ls139 told me that the 6516 is to be "selected",or 'controled'.

6527's pin20 to pin27 are connected to 6538's pin2 to pin9,this seems to be a data link

since i have't removed the chips on the pcb,some roauting details are unknown.

True, that would be a good indication. I did a quick search for just 6516 (without the um prefix), and found HM-6516, which is a 2Kx8 RAM chip. See
http://chipmanuals.com/datasheets/search/go/ for the search engine that Google found for me; this is where I typed "6516" and it came up with a few hits that looks like it might work.
Not sure if the 6527 is the microcontroller or not, but plugging that into the same search engine as above yields something like this:

LC6527F -- 4-bit single-chip microprocessor for small-scale control-oriented application

It appears to be only 18 pins in size. How big is the 6527 on your circuit?

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

if somebody is hunting for datasheets I'd recommend an easy to use multisearcher I mounted on personal my webpage: www.rafalszyja.republika.pl

Hmm...40 pin 6527. Gosh, I don't know then. Sorry. I tried though.

Software wise, the Famicom us a Nintendo 8 bit which uis 6502 based.

They're clones of these chips, sounds like the same pinout:
http://nesdev.parodius.com/2A03_pinout.txt
http://nesdev.parodius.com/2A03%20techn ... erence.txt
http://nesdev.parodius.com/nes_ppu.txt
http://nesdev.parodius.com/2C02%20techn ... erence.TXT

Here's a Famicom schematic.. I just noticed '6527' is handwritten on there, too.
http://nesdev.parodius.com/Ntd_8bit.jpg

So it's a 6502 with sound and some other things.