So would it be possible to replace a crystal or oscillator on the logic board to clock chip it or slow it down? i ask because i'm making a variable speed oscillator for clock chipping macs.
it'll go to less than 1 mhz and can be varied in steps of 0.1 mhz or finer, on up to 133 mhz. it'll connect to the serial port and be controllable by any dumb terminal program with simple commands, and will respond with status as well. it will default on power cycling to a preprogrammed frequency saved in eeprom which can be changed once a suitable frequency is found (or if set too high can be reset by plugging it's serial interface into another computer). i'm designing it to connect with conductive epoxy (i'm repackaging it into smaller syringes to make it cost effective) and it's barely larger than the normal oscillator, pinned out so that it can be mounted on top of the old one. i'm in the middle of another project right now but should be back to that project in a week or two and will hopefully have it done within a week of getting back to it. i just have to write the code for it, i've already had the circuit boards made (3 small surface mount chips, i'm using both sides of the board, very dense). i'm wondering if this would also be useful to people playing with the apple II line etc. i have a iie myself that i'll be getting up later. just a thought, since people are doing hardware hacks on the older apple ii line as well as older macs (and i'm considering some other apple ii projects eventually). i'm disabled but have some good time and i'd love to come up with a couple of little products that make a little money and are useful to people, low volume stuff since i don't have much to put into anything or a way to build in large quantity. the apple II was the second computer i ever used, right after a timesharing system via 300 baud decwriter II terminals and i've always loved them! even hand assembled some assembly code for one. Antonio Rodr�guez wrote: > > Just a thought. Apple licensed the Zip technology from Zip Technologies but > built it directly into the //c+'s motherboard because Zip Technologies > wasn't able to provide the Zip chip in the quantities required by Apple (see > http://www.apple2history.org/history/ah09.html#ZipIIc). So it looks likely > to me that the "slowdown" procedure should work in both the Zip and the > //c+. Of course, I do not have a //c+ (I'd like to!), and thus can not > assure it... -------- -- "The liberty of a democracy is not safe if the people tolerate the growth of private power to the point where it becomes stronger than the democratic state itself. That in its essence is fascism � ownership of government by an individual, by a group or any controlling private power.": President Franklin D. Roosevelt <http://www.commondreams.org/views04/1106-30.htm> -- Apple2list is sponsored by <http://lowendmac.com/> and... / Buy books, CDs, videos, and more from Amazon.com \ / <http://www.amazon.com/exec/obidos/redirect-home/lowendmac> \ Support Low End Mac <http://lowendmac.com/lists/support.html> Apple2list info: <http://lowendmac.com/lists/apple2.html> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/apple2list%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
