This is some work to recognize the DUO and MBCs IM2 pin header interrupts.
And specifically to support a hardware time interrupt using them.
Further work to be merged to support a VT82C42 based keyboard using IM2 pin header arrangement with a circular buffer.
Interrupt allocation/numbering is unclear as there is no real standard and limited inturrupt slots means overlaps.
wwarthen
commented
10 months ago
This is some work to recognize the DUO and MBCs IM2 pin header interrupts. And specifically to support a hardware time interrupt using them. Further work to be merged to support a VT82C42 based keyboard using IM2 pin header arrangement with a circular buffer. Interrupt allocation/numbering is unclear as there is no real standard and limited inturrupt slots means overlaps.