> On 2018-06-13, at 23:27, Francesco Messineo <francesco.messineo@gmail.com> wrote: > >>>>> probably the best thing would be re-creating a clone of the 6525 in a >>>>> MAX7000 (5V series) CPLD. I can help (but I haven't a lot of spare >>>>> time) if anyone likes doing that. >>>> >>>> I am still waiting for someone to reimplement the 6526 replacement, which probably is in higher demand... >>> >>> well, yes, I could try that indeed. I have the impression though that >>> the 6526 isn't among the most scarce ICs. I was thinking just today to >>> attempt to design a CPLD adapter to use a 6502 in place of the >>> 7501/8501. Having a nice C16 without a working CPU annoys me and the >>> 7501/8501 prices are outrageous. >> >> By the time you finish the 7501, your TED will go belly up and you'll have next nice project on your desk :-) > > well, I have repaired a few computers from the 264 family, I've never > found a faulty TED, but I know they tend to die too. In my practice they were even more die-prone than the CPUs. I'd say about 55 for the TED, 40 for the CPU. With the remaining 5 being ROM/RAM/other. > The CPUs die more often. My C16's TED is still working fine (I can > test it whenever I get a suitable cousin to be repaired). > > It seems to me the 7501 isn't difficult to design around a 6502, if it > only was more "documented". Yea. The 6502 has been reimplemented multiple times so it would require "only" to know what needs to be done on top. -- SD! - http://e4aws.silverdr.com/Received on 2018-06-14 00:02:24
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