On Thu, Oct 27, 2005 at 11:41:16PM -0500, Geoff Strickler wrote: > Yes, some of us are looking into it. It's not exactly from scratch, the > TW/TWGS designer is a friend of mine and he has all the technical info > available. There are still issues to be worked out. It's not a done deal, > but we are looking at it. No promises other than "it might happen".
If memory serves me correctly, the TWGS was a multilayer board with a daughter card and two or three dozen ICs. That would make it very expensive to reproduce. Worse yet, the card may need to be redesigned if some of the components are no longer available. The advantages of designing a new card from scratch: RAM is cheap today. You could create an 8 MB IIgs, and just mirror the memory that is used for hardware access. While I cannot claim to understand the TWGS, I'm willing to bet that that type of design would use fewer support chips than using a cache based approach. Relatively fast CPUs are also available today. You could write a 65816 CPU emulator to run on a non-native processor, and still have enough processing power available to take care of all of the house keeping (eg. mirroring the relevant bits of RAM). Byron. -- 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:apple2list@mail.maclaunch.com> 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/> iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
