#21 - 65C22 Versatile Interface Adapter - BB816 Computer
In this video, the computer gets its first I/O ports! I connect the 65C22 Versatile Interface Adapter. We look at the datasheet and at the timing diagrams, and I code a blinking LEDs demo.
Join me in discussing this project in the 6502 forums: http://forum.6502.org/viewtopic.php?f...
View the source code and schematics shown in this video: https://github.com/adrienkohlbecker/B...
The most recent source code and schematics are available here: https://github.com/adrienkohlbecker/B...
Chapters:
00:00 Intro
00:32 65C22 datasheet
05:09 Adding the VIA to KiCad
09:37 Breadboard implementation
16:26 Coding blinking LED demo
22:35 16 bit mode access
25:07 RDY, BE, VA discussion
29:33 Timing diagrams
33:21 Outro