forked from amberisvibin/chibi-pc09
12 lines
277 B
Plaintext
12 lines
277 B
Plaintext
uPD7220 graphics card
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https://hackaday.io/project/164728/logs
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16550 to 6502
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https://www.cs.cornell.edu/~kt/post/6502-5/
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VT82C42 to 65816
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http://www.baltissen.org/newhtm/65816atx.htm
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6502.org post about CMOS/TTL driving voltage
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http://forum.6502.org/viewtopic.php?f=4&t=3477
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