Problems whit games on an A1200

[amigagr]

a lot of old games that has writen for the a500 ocs graphics chip and the 68000 cpu don't run on the a1200 if you don't make a fiew tricks while the a1200 boots up. right after you power on the amiga hold and keep both the 2 mouse buttons, and at the screen that will appear change the display options to original, after that in the boot options check the ''disable cpu caches '' and restart the amiga. you can try these sets together or one by one and see how/and if the games work. how much free ram you have after a normal boot? maybe and this has something to do in a second level...

[amigagr]

As far as i know the ocs can't turn back to aga without reboot. If you boot with aga yes you can use ''killaga''
commands from the shell (if you have any in your c: directory, if not, you can search at aminet for this. With some shell commands you can turn on and of the cache of the cpu after the boot. I never use the WHDload and i don't know how it works but if you have a setup that runs ok on the a600 go and copy it to the a1200! probably will work. As for the aga game,maybe  it needs ram... try to find at least a ram expansion or even better a 68030 accelarator to gain more cpu power together with more ram

[amigagr]

run snoopdos (from aminet too) before any program or game to find why the other games don't run. it will report what is the game/program load at run time and maybe this way you will discover what is not going well. files,assigns that are missing etc. (don't work always but helps a lot quiet enough times)