On 12/12/2013 12:22 PM, Mike Naberezny wrote: > On 12/12/13, 9:31 AM, brain@jbrain.com wrote: >> The discussion caused me to ponder options. >> 6551s are becoming hard to find (yes, WDC now makes 6551, but it's >> not cheap) > > Jameco has stocked the 6551 for years. I had not checked there lately. I thought they were reducing their 65XX stock, but if it's still there, that's good. > I don't know what you consider cheap but they have both the 6551 and > W65C51N for less than USD $5/ea with discounts for quantities of 10 or > more. $5 is not "expensive" in absolute terms, but for $5.00 in singles, I can obtain a AVR ATMEGA164, which provides a whole host of features. in ARM, I can get a Cortex M3 running at 50MHz with 128kB of ROM and 16kB of RAM, coupled with a huge host of peripherals onboard. So, in relative terms, I can offer a lot of functionality (dual or quad uarts, huge FIFOs, onboard tcpser functionality, etc. at the same cost. But, the fact that 6551s are still available means I could start with a simple solution and work my way to something larger. Mainly, I didn't want to create a project that made people scratch their heads and say, "Gee, Jim, I'm glad you put plans out there for a PCB and CPLD equations, but since I can't easily source the 6551, you've just teased me with something I can't make or use". Jim -- Jim Brain brain@jbrain.com www.jbrain.com Message was sent through the cbm-hackers mailing listReceived on 2013-12-12 20:00:04
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