Newbie and a few questions

[Kronos]

There are plenty sites, and which you should visit depends on what you plan to do .... (doh)

Those "1MB" games are probraly not Kick2.0 compatible or stumble over aspects of the ECS-chipset. The 500+ has 1MB default and is often upgraded (via the trapdoor slot) to 2MB.

You might want name specific games and describe symptoms of "not working".

[Kronos]

You do indeed need to open your Amiga. There is a bunch of screws at the bottom. One you removed the topcase and disconnected the keyboard your allmost there.

There should be an RF-shield covering the whole board hold in place by some latches.

If your down to the board you'll find the battery near the trapdoor slot (looks like a small barrel). If your lucky a previous owner has allready removed it, if not do it now and make sure you clean up all leaked acid.

There is the possibility that your battery has not leaked (as remote it may seem) you should still remove it now as it will leak sooner or later.

[Kronos]

Kick(start) is the base operating system found in a ROM chip onn the board.

Most games where coded while Kick1.2 and 1.3 were current and some of them are not compatible with Kick2.0.

The A500+ was a minor upgrade from the A500 as it replaced Kick1.3 with 2.0 doubled both onboard and trapdoor RAM (1/2MB vs 0.5/1MB) and came with battery backuped clock (thats why you only find those batteries in the A500+ and bigbox Amiga).

Removing the battery will stop the system clock being updated on boot, but even that can be solved by replacing it (just don't use another barrel-form rechargeable as that will leak sooner or later too).

Leaking batteries are the No.1 reason of dead Amigas.