Installing the Super Agnus (8372A) in the Amiga 500, is a very straight-forward procedure. The only difficult aspect is the removal of the old Fat Agnus (8370) if you do not have the proper chip extraction tool. If you do not have a PLLC chip extractor, remove the motherboard entirely from the case. If you have an extractor, remove the old Agnus now. If not, follow the instructions in the next two paragraphs.
Remove the top of the plastic case from the A500. Unplug the keyboard from the A500 motherboard. Note which way the keyboard is plugged in! If the keyboard is reconnected improperly, damage will result to the A500 and/or keyboard. Remove the top metal sheild and floppy drive. Next remove the motherboard from the bottom of the A500 shell. Finally, remove the bottom metal sheild from the motherboard itself.
Once the motherboard is entirely accessable, turn it over, and locate the two holes located beneath the Agnus socket. Take a small flatblade screwdriver, and verify that it will fit easily through the holes. Now take the motherboard, and place it in your lap. Put the small screwdriver through the holes, and give it a light blow with a hard object. Slowly tap the screwdriver until the Agnus falls free. Replace the bottom sheild and motherboard.
Now insert the Super Agnus into the socket. Note the dimple in the middle of one end of the Agnus. This denotes the location of pin one, which is also silkscreened on the motherboard. Press firmly down onto the Agnus, until it is well seated in the socket.
Next, locate JP2 on the motherboard. It is located between the 68000 and the ROM (see the IFF picture included in this archive). Cut the trace connecting the two bottom pads. Now solder a bridge across the top two pads. Now the trace connected to pin 32 on the CNX connector must be cut. Locate the plated hole and trace show in the enclosed picture. Cut this trace, or cut pin 32 off (16th pin up, on bottom row).
Reconnect the entire system and boot Workbench 1.3. You should see all your installed RAM, on the Workbench screen. You can verify that the system see's the internal RAM as CHIP memory by using the AVAIL command in the CLI.
