Posted By
JamesC on 2015-08-08 02:13:55
| Re: Making a cartridge...
16K. The slot that held the ROM maps in at $8000, the other slot maps in at $C000.
Cartridge ROM must follow this sequence to be recognized: $8000-8002 4C xx xx (where xx xx is the cold start address within your ROM) $8003-8005 4C xx xx (duplicate the previous line; this is intended for warm start but hardly anyone uses it) $8006 Unique cartridge number (please select a value $10-$FF if you want it to appear on a function key, or 01 = autostart) $8007-800a the ASCII characters 'C B M'
You can look at any CRT on Plus/4 World with a hex editor to see how other programmers do it, but basically if you follow this setup the Plus/4 or C16 will know what to do with your cartridge.
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