This example shows how to make almost any ROM game run from cartridge.

Key points:
1. Firmware is booted at the start, this initialises the hardware and shows the sign on message. it is unpatched cpc6128 OS ROM.

2. The boot rom is a "foreground ROM". It is started when the firmware has been initialised. Background ROMs have not been enabled at this point.

3. Firmware is at page 0 of the cartridge. Our foreground rom is at page 1 of the cartridge (occupying the space BASIC would take). Game ROM occupies
page 3 where AMSDOS is normally located. Page 2 is normally reserved for the game, we don't use this. We put dummy data here.

This cart is 64K long. It will work with single 16KB rom games. Only cartridge page 0,1 and 3 are visible to the firmware. If you want to use
the other pages you need a patched firmware.

