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  1. I’m about to buy two F18A’s, one for my “new” TI-99/4A, and one for my 65816 based homebrew computer MARC-2. As I said before, my intention is to write a few little machine language games for both systems simultaneously. So both having the same VDP, surely is a huge advantage. Even more because the F18A is becoming almost a standard in the TI community. Of course I’ve looked on Matthew’s site and on this forum, but I probably overlooked one or two things. MARC-2 has a 3.3V data bus on the CPU side, and a 5V data bus on the RAM side. In between, there is a 3.3V but 5V tolerant CPLD. (XC95288XL) My question is, can I connect the F18A to the 3.3V side? And just out of curiosity, who of you uses the F18A with another computer than the TI-99/4A? *------ Although MARC-2 is 3.3V, it’s not the definitive destination for the F18A. I’m designing a new computer, MARC-3 (My Adorable Retro Computer version 3). It’s practically almost ready, except for the actual build. The main difference is that it will be modular, that is, I’ll use a ground plane, similar to the S-100 bus, and carts for the different parts of the computer system. The second difference will be that it’s running solely on 5V.
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