WHDLoad, extra

Turning JIT off

The whole page is a WinUAE switch.

Why any of this

The Amiga 1200 was the last great Amiga Commodore made, and the desktop people built on it is the one worth having back: Kickstart 3.1, AGA, a hard disk, a graphics card for a screen bigger than the chipset could draw, MUI for modern windows, color icons, and WHDLoad so every game lives on the disk instead of in a box of floppies. An emulator or a MiSTer puts that machine back on your desk. Getting to that finished desktop is the work.

You cannot download it ready-made. Workbench and Kickstart still belong to someone, so the disks and the ROM have to be yours, and Commodore’s own installer has to copy them. Everything after that is a recipe of Proceed buttons, the Green Amiga Alien guide, which people have followed by hand for twenty years. These notes turn that recipe into scripts, so someone new to Amiga emulation gets the upgraded A1200 in an afternoon, from disks they own.

The end of the road is a build nobody babysits. AmiPilot can sit inside the running Amiga, click what is left of the installers, and take a picture of the screen, so an AI agent can check that the desktop came up, that the icons are in color, that a game launches, and fix the script when they are not. Every page here is one step toward that.

JIT is a trick a PC uses to run 68k code faster, and some games hate it. The guide’s extra WHDLoad page uses uae-configuration so a slave can turn JIT off before it runs and back on when it quits. That tool is talking to WinUAE.

Eliminated
All
A slave runs uae-configuration to disable JIT, then enables it again on exit.
Eliminated. Chapter 1’s JIT tick was already eliminated. The core executes the CPU directly. Leave the tool uninstalled. It has no emulator to reconfigure.

Step numbers follow the JIT note linked from the guide in the Green Amiga Alien guide. The words are ours.