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One of the easiest alterations a TS2068 user can make on the machine is new character sets. Initially, the ROM uses the character table it was “born” with. Unless you tell it otherwise, it will do so forever. If there did exist another set, and you POKEd a couple of addresses, you could be printing in another font! In the 1000, a similar table also exists, but you can not alter the printing address, Likewise, you can not alter the characters (without altering the contents in the TS1000 ROM). Put simply, the address of the character set pointer is in the TS 1000 ROM and on the 2068 you will find it in RAM (where you can easily modify it).