NEC uPD7220/GDC Design Manual

Date: Wed, 17 Jun 2009 21:37:04 -0400 From: Andrew Lynch <lynchaj at yahoo.com> Reply-To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> To: cctalk at classiccmp.org Subject: RE:NEC uPD7220/GDC Design Manual --- On Wed, 6/10/09, Andrew Lynch wrote: interested in selling it? I contacted NEC and they didn't know anything about it. Apparently very few people still have the manual and bitsavers doesn't have it either. I did some library searches but no luck although it is cited as a reference in a couple of college papers like masters thesis, etc. What I really need to know is if I can implement a simple circuit using few enough 74LS TTL ICs to fit on a Eurocard ECB board. That means it can't be more than about 30 maximum. Using high capacity SRAMs should help but I think it requires some funky latching mechanisms to share the video address and data lines. I looked at the NEC APC video board and it is just huge. I hope that is not an indication of the complexity needed! Thanks and have a nice day! Andrew Lynch