NanoMig 020+cache + Kick Switch Lite

[Manger74]

Recently i did an experimental build of the NanoMig + 020 + cache + ROM loader. The EDA was not able to build the core - the routing failed. Chip full!
I've tried to optimize the building process for routing, but then the core became unstable on games and demos...

In october i have startet an attempt for a simple kickswitch (from flash), without success...
Have tried again the last days and succeeded!
It takes long to build but it works with a priority for timing...

https://youtu.be/9FKbHuOyl2E?si=-THuKTQNF-iZdcwS

for TN20K only!
It won't merge into the main fork, as the ROM loader (from SD) is already implemented.

I have flashed Kick 1.3 to 0x400000 - but maybe it would be better to flash 3.1 as default at 0x400000?

Like this:

0x200000 - 0x400000 Kickstart 3.1 / 512k (default)
0x340000 - 0x680000 Kickstart 1.3 / 256k (optional)
0x360000 - 0x6C0000 Kickstart 1.3 / 256k (optional)
0x380000 - 0x700000 Kickstart 3.2 / 512k (optional)
0x3C0000 - 0x780000 DiagRom 2.0 / 512k (optional)

What do you think?

[harbaum]

You can always do things like this using some compile time option using ifdef's. That way your solution gets other updates as well. Or you can of course just maintain a separate branch.

One thing I still need to find a solution for is varying menus. Your solution requires a different menu than the SD card loader and thus the builds should include different menus ...

[Manger74]

My goal was to combine all the latest features and make it work for the TN20K. The problem is that 020 and ROM loader won't fit together.
If built with priority for timing, the 020 runs well, i think, although some more testing won't be bad...
With a bigger chip it will be possible to switch between 68000 and 68020 i believe, right?
But for the TN20K it won't be possible to merge the 020?

I did not know about ifdefs... sounds interesting!
If the problem with the menu can be solved that would be great!
In the meantime it will be best, to keep this experimental branch, i think... i also must test it more to see if it works flawless...

[Manger74]

You can always do things like this using some compile time option using ifdef's.

In this case it would also work without ifdef...
If osd_kickstart is not set from the menu,
the code will simply load the ROM from the default location...