Another even simpler idea would be to just make the "ROM" writeable! Then you could so the copy in software.
Dave
You just read my mind. I was hesitant to do that, because there could be unintended consequences of making ROM into RAM. But, If I tucked a little xmodem-based program (for the sake of ease) somewhere in the address range outside of the current "ROM" address range, I could call it from the monitor and then use it to overwrite the monitor.
What do you think?
Jon
Oh, PS: I got that Pynq Z2 board you showed me a while ago. Amazing piece of hardware! It kicks the butt of the Arty Z7.
Oh, PS: I got that Pynq Z2 board you showed me a while ago. Amazing piece of hardware! It kicks the butt of the Arty Z7.
Yes, I haven't done that much with mine, because I really hate Vivado. I did do a port of the Beeb FPGA last June, which uses HDMI and allows a USB keyboard to be used. It's still sitting on the dev branch. This is the top level design.
Oh, PS: I got that Pynq Z2 board you showed me a while ago. Amazing piece of hardware! It kicks the butt of the Arty Z7.
Yes, I haven't done that much with mine, because I really hate Vivado. I did do a port of the Beeb FPGA last June, which uses HDMI and allows a USB keyboard to be used. It's still sitting on the dev branch. This is the top level design.
Dave
Speaking of the Beeb, I just watched Micro Men for the first time. I had no idea all that went on on your side of the pond - very interesting stuff! I hear Sinclair just passed away recently.
Oh, PS: I got that Pynq Z2 board you showed me a while ago. Amazing piece of hardware! It kicks the butt of the Arty Z7.
Yes, I haven't done that much with mine, because I really hate Vivado. I did do a port of the Beeb FPGA last June, which uses HDMI and allows a USB keyboard to be used. It's still sitting on the dev branch. This is the top level design.
Dave
Dave, it worked!!! Now, if you want to replace the monitor ($C000-$FFFF), there is a small bit of hard-coded ROM at $B000. If you run it (B000R at the built-in monitor), it will start an Xmodem transaction that will allow you to upload a .prg file to replace the current monitor - all without re-synthesizing and re-implementing the whole thing!
Now I just need to re-write the monitor to take total advantage of the 65c816 native mode - I couldn't find any pre-existing 65xx monitors that weren't written for the 'c02.
Now I just need to re-write the monitor to take total advantage of the 65c816 native mode - I couldn't find any pre-existing 65xx monitors that weren't written for the 'c02.
When I moved from 65C02 to my '816 boards I more or less kept the same C02 code and took the view that it was then up to the application to switch to native mode if it needed to. That made it easier to run up things like BBC Basic and so on.
When I moved from 65C02 to my '816 boards I more or less kept the same C02 code and took the view that it was then up to the application to switch to native mode if it needed to. That made it easier to run up things like BBC Basic and so on.
-Gordon
That's what I'm using now, but the issue is that you can't access addresses beyond the first 64k (with, say, a traditional WozMon).
The other thing I'd like to try - but I don't know where to start - is going beyond just simple text over UART to some sort of primitive graphics. I still want to take input over serial, but I want to learn how to do VGA and character ROMs and maybe output to a VGA monitor.
