Re: 1802 vs 1805/6


Hello Magnus!

Most of the 1800 series are a bit dated unless you want to build a computer completely 'retro'.

Among those you mentioned there also is the CDP1851. This one is a dual parallel IO port. Both ports can be configured for input, output, bidirectional and bit mode. I have seen that similar devices have been used to build IDE interfaces or to read input from a PS/2 keyboard or mouse. This one may be quite interesting.

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