"Michael J. Mahon" <mjmahon@aol.com> wrote in message np-dnff_Z8gR74bUnZ2dnUVZ_jWdnZ2d@giganews.com">news:np-dnff_Z8gR74bUnZ2dnUVZ_jWdnZ2d@giganews.com...
Michael J. Mahon wrote:Bill Garber wrote:"Jerry" <awanderin@yahoo.ca> wrote in message m363mt5zna.fsf@yahoo.ca">news:m363mt5zna.fsf@yahoo.ca...mojoehand <jgray@zianet.com> writes:Jerry Penner, I wanted to thank you for the information you emailed, but my reply bounced. It seems that Yahoo is being too agressive in its spam filtering.Must be. There was no message in my spam folder at all, which is the usual case. I would have put the patent document online, but I don't have a web-site right now. For others who are interested, the patent is US# 4,631,692, and can be found at uspto.gov.I went there, and searched it, and the only info available was that it had expired on December 23, 1998. I couldn't actually find the Patent there.Go to: http://patft.uspto.gov/ and select Patent Number Search, then enter 4631692 and you'll see the patent. It describes a 4-bit shift register implementation, where the shift register is clocked at 14.3MHz--the classic 16-color implementation.I see Jerry made an equivalent suggestion. ;-) From the patent description, it seems that AN3 and /80COL need to be made available to the card to do mode selection. (I wonder why the /DEVSEL space wasn't used for this function?)
Would depend on whether it's the II or IIe version, I assume. If /DEVSEL was used it may knock heads with the internal 80COL mode of the IIe.
Bill Garber from GS-Electronics http://www.garberstreet.com"If you wish to forget anything on the spot, make a note that this thing is to be remembered." (Edgar Allen Poe)