Posted By
GeorgeHug
on 2021-12-15
17:45:29
|  Re: Error in Plus/4 Kernal Rom
I've completely rewritten the alternate ACIA servicing code. The new version is on my Github:
https://github.com/gbhug5a/My_CBM_stuff/tree/main/Plus4_IRQ_ACIA_error
In addition to the "BEQ" error, it now fixes the double-interrupt problem on transmit, and turns off transmit interrupts if there's no outgoing traffic.
I have no way to see if the new code works. I've looked at a number of Plus/4 terminal programs, and most of them bring their own servicing code with them, so they wouldn't benefit from what I've done. One exception is Higgyterm for the Plus/4, which as far as I can tell just uses all the Kernal stuff as is. It might be interesting to see if Higgyterm would run better with my code pre-installed.
Anyway, thanks for everyone who helped me get this finished. It's been hanging for 30 years, and I just needed to get it done.
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