09-05-2022, 11:25 AM
Another quick update on the Classic Plus Development :
Late last night I got the keyboard working using both keyboard scanning methods, however there is a timing issue that I still have
to sort out to tick it off. While the keyboard input is perfect under the machine language monitor, if I enter into terminal mode, occasionally
the keyboard returns the scan code for the key pressed + 1, ie, If I press the 'A' key, I occasionally get a 'B'.
I'm hoping that will be sorted quickly and then onto getting the Floppy booting. I have done some minor tests on the floppy drive interface
and it selects the drives o.k. and can step the head o.k. so I'll be checking the side select signal next and the Head Load Timing signal.
Late last night I got the keyboard working using both keyboard scanning methods, however there is a timing issue that I still have
to sort out to tick it off. While the keyboard input is perfect under the machine language monitor, if I enter into terminal mode, occasionally
the keyboard returns the scan code for the key pressed + 1, ie, If I press the 'A' key, I occasionally get a 'B'.
I'm hoping that will be sorted quickly and then onto getting the Floppy booting. I have done some minor tests on the floppy drive interface
and it selects the drives o.k. and can step the head o.k. so I'll be checking the side select signal next and the Head Load Timing signal.