Please refer to the following homebrew projects:
- https://github.com/adumont/hb6502
- https://awsh.org/homebrew-6502-computer-part-1/
- https://www.grappendorf.net/projects/6502-home-computer/#table-of-contents
- https://pmig96.wordpress.com/2020/07/15/mc6847-test-circuit/
Project Phase #2:
- build the first MC6847 video display 'warmup' computer.
- i have found three projects based on the 6502 which make use of the MC6847 and have published their schematics. so far so good. when the parts arrive i have to trust my breadboards and little wires are of a sufficient quality as not to bounce and ring, we're dealing with sub-1 MHz TTL-level digital signals so.... maybe my dodgy tools and components will be good enough.
- build the first permacomputer prototype
- the next step after i have honed my practicals skills on a simpler task is this: construct a custom video display for the permacomputer, based on the information contained in don lancaster's cheap video cookbook or here if you wanna support the internet archive?
- the reason for using custom logic for the display is the limited number of columns the MC6847--it is my hope to have 40 columns, not a mere 32. i wish i could say more, but the short story is this: using EEPROMs in place of discrete logic is the ticket to having a simple design.
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