![]() ![]() The internal logic fabric can easily be changed for different designs or to correct design mistakes. I know many think CPLD, a 1990's technology, is too "modern" for retro computing, but if you'll consider it as an acceptable component, I can point out several advantages for using CPLD: Caution, I'm new to 6502 with only a couple successful 6502 designs, so you may want to take my opinions with a grain of salt. Therefore would the ATF22V10C-7PX chip be a good choice as this wasn't mentioned in the post, and the ATF22V10CQZ-20PU chip was mentioned?īDD mentioned CPLD such as ATF1504AS. So planning for this, I'd rather buy the fastest components now (for SRAM and whatever else). After this, I will read up on techniques on how upgrade it incrementally to a faster clock, 6MHz, then 10MHz, and finally 14MHz. I've selected the following two, the aforementioned one in the post, and the fastest one:įor the first version of my SBC, I plan to run it at 1MHz. Looking into this particular PLD, I noticed a few versions at au.mouser (I am in Australia). I will read the PLD's datasheet but very much still need my handheld all the way, as this is my first build. After this I continued my studies in Comp Sci, and have been developing in high-level languages since then - 30 years or so. Now, my electronics background is very very rusty. Is there a schematic out there for a 65C02 using a ATF22V10 (or similar chip) for address decoding? I'm all for using less chips for obvious reasons - cost, reducing propagation delay, and less things may go wrong.ġ. I was planning on following this until yesterday I came across this post: where some others are using PLDs like the ATF22V10CQZ. I've finally understood how Daryl's address decoding works using 74 series chips. I really like that fact that it's all DIP chips and the memory space for the ROM is 32KB and RAM is 32KB (mostly). I've been looking into Daryl Rictor's SBC-2 ( ). I feel I now have a somewhat basic understanding on building a SBC. (I'm so thankful that I kept these old books from my studies!!!) These include the 6502 primer ( ), and 2 books, "Microprocessors and Microcomputers" 3rd by Tocci/Laskowski, and "Programming & Interfacing The 6502 With Experiments" by De Jong. I've spent the last 3 weeks reading up heaps on 65C02 and related chips. ![]()
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