NEC uPD7220/GDC Design Manual
ragooman at comcast.net
Thu Jun 18 17:30:16 CDT 2009
Tony Duell wrote:
>> Did you get the one copy at this link ?
>> It doesn't have schematics per say, but there's plenty of info in that pdf.
> I thought hte Epson QX10 used a 7220, and I've just checked the technical
> manual and it does.. The video circuitry is on a daughterboard, the
> newer one used an ASIC so the schemaitcs aren't a lot of use to you, but
> the older one was the 7220 + DRAM + TTL + a chracter generator EPROM. It
> doens't look _that_ complicated...
> I think the QX10 technical manual is on a web site somewhere, and
> includes said schematics.
> May be of interest...
yes the tech manuals are on that website.
I just downloaded them too
How many pages is in the 7220 databook ?
That link for the databook has 24 pages and a friend of mine here in
Pittsburgh has a papercopy which has only 24pages.
[ = http://www2.applegate.org/~ragooman/ ]
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