On 6/17/2010 8:18 AM, datajerk wrote:
On Jun 16, 4:14 pm, "sfahey"<sfa...@a2central.com.remove-88e-this> wrote:To: Steven Hirsch Re: Cool eBay score By: sfahey to Steven Hirsch on Wed Jun 16 2010 05:09 pm > I passed on it (your welcome?) because... well, I have a bunch of them alrea Sorry, I didn't mean that to sound like I was bragging -- I meant, I have too many and I'm even considering getting rid of most of them. Too much stuff!!! Sean Faheywww.a2central.com bbs.a2central.comThis thing looks awesome. My Apple II knowledge has a gap from ~1985/6 - 2009. I've missed a lot of things and forgotten more. I just purchased a //c last year to replace my lost ii+ compat. After a Google I take it that this upgrade gives me 8MHz (not needed, is it software switchable?), Z80 (what MHz?), a clock, and 1MB. I am most interested in the Z80 and clock, but the rest is nice too.
It is fully switchable (though you probably will leave it at 8MHz except when playing a game ;-). Holding down the ESC key during a reset completely disables the acceleration, making the machine "stock". Running a configuration program allows you to set each slot, plus the paddles and the speaker, to run at normal or accelerated speed. The utility also allows you to choose the effective clock speed over a fairly wide range. The usual way of using the utility is to make it the first .SYSTEM file on a boot disk, so that it runs first, establishing the desired (editable) configuration of the Zip Chip, then it runs the next .SYSTEM program as usual. Once your configuration is set up, you don't have to interact with it at all. -michael NadaNet 3.1 for Apple II parallel computing! Home page: http://home.comcast.net/~mjmahon/ "The wastebasket is our most important design tool--and it's seriously underused."