Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!samsung!think!bbn!rochester!udel!wack From: wack@udel.edu (Andrew Wack) Newsgroups: comp.sys.apple Subject: Re: 28MHz Keywords: begun, turnpike, gullible, contiguous Message-ID: <11493@nigel.udel.EDU> Date: 19 Feb 90 05:43:18 GMT References: <10757.infoapple.net@pro-generic> Sender: usenet@udel.EDU Reply-To: wack@udel.edu (Andrew Wack) Organization: University of Delaware Lines: 27 In article wombat@claris.com (Scott Lindsey) writes: >In article <10757.infoapple.net@pro-generic> sysop@pro-generic.cts.com (Matthew Montano) writes: > >> A brand new ROM3 //gs was recieved by a friend of mine who runs a small >> dealership in Oakville, ON. When he recieved it, he opened it up to install >> the TWGS, Sonic Blaster and SCSI card.. and he noticed something, well.. >> weird. > >> There is now a 28.63630Mhz crystal on the motherboard. I have a 28mhz crystal >> on my TransWarp GS at home... > >Did it actually say that on the motherboard? Mine says "3.686400 MHZ" and >the actual crystal says "NYMPH 197-00208 88-28", but it's also a beta machine. > Don't get too excited. My Woz edition gs also has a 28.63630 crystal on the motherboard. It is also in the schematic in the hardware reference. That frequency is used and subdivided to provide all the timing (including video) on the gs. An apple ][, ][+, //e all have 14.318... crystals, but they still only run at 1 Mhz!! -- -------------------------------------------------------------------------------- Andrew Wack Gravitation cannot be held responsible Internet : wack@udel.edu for people falling in love -- Albert Einstein