Subj : Re: Plus 4 rom error - is there any place to report it?
To   : George
From : Jim Brain
Date : Sat Nov 27 2021 12:34 am

On 11/25/2021 5:57 PM, George wrote:
> Just to bring this to a conclusion, I've written alternative IRQ servicing
> code that bypasses the "BEQ" error in rom, and a BASIC program that
> installs the new code into the tape buffer.  It's 120 bytes of ML that does
> the ACIA processing and then jumps back into ROM for the rest of the IRQ
> routine.  The BASIC program and the source code for the ML portion are
> shown below. The actual .PRG file can be downloaded from my Github CBM
> repo:
>
> https://github.com/gbhug5a/My_CBM_stuff
>
> Since I no longer have a +4, I have no way to test the new code.

Do you have the VICE emulator?  It supports the +4 and the built in
6551, and can tie that 6551 ACIA to a real or virtual serial port.  You
could test it there if desired.

Jim

--- SoupGate-Win32 v1.05
* Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)

You are viewing proxied material from cvs.synchro.net. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.