{"id":9,"date":"2007-12-30T23:41:27","date_gmt":"2007-12-30T21:41:27","guid":{"rendered":"http:\/\/www.bkits.at\/weblog\/?page_id=9"},"modified":"2009-03-22T17:45:21","modified_gmt":"2009-03-22T15:45:21","slug":"programming","status":"publish","type":"page","link":"http:\/\/www.bkits.at\/weblog\/the-sharp-pc1403h\/programming\/","title":{"rendered":"Programming"},"content":{"rendered":"

The PC1403 basically supports the inbuilt BASIC programming language. Therefore it offers two modes: The programming mode, where the basic source code can be entered and the running mode, used for running and debugging programs.<\/p>\n

Tip: Saving RAM<\/strong>
\nFor saving RAM space, you should always use tokens for the BASIC commands. They are accessible via SHIFT – key and only use two bytes instead of X bytes (depending on the commands length) if typed char by char.<\/p><\/blockquote>\n

You may find the most supported BASIC commands in the manual – most, but not all. Sharp forgot – or simply denied – to mention the most powerful commands, opening the doors to Assembler programming:<\/p>\n

Note: Keep attention!<\/span><\/strong>
\nUsing the following commands with random parameters can end up in an inconsistent state, which needs the PC1403 to be reseted – all data in the RAM will get lost – save more, save often! (That might be the reason, why Sharp didn’t publish them in their manuals\"\")<\/p><\/blockquote>\n

Peek and Poke<\/h4>\n

These two commands enable to set \/ get values to \/ from a specific memory address and are therefore quite powerful and your door to system programming.<\/p>\n

PEEK(address)<\/code>
\nReturns the 8 bit value, stored in the memory at address (16 bit, of course).<\/p>\n

POKE address, value1 [, valueX...]<\/code>
\nStores the 8 bit value1 at the 16 bit memory address address. If a list of values is parsed, the address will be incremented automatically.<\/p><\/blockquote>\n

Peek and Poke already enhance the BASIC interpreter’s functionality enormously. For Assembler programming, you’ll need the Call command too:<\/p>\n

Call<\/h4>\n

The call command can be used for calling an assembler program directly e.g. ROM functions.<\/p>\n

CALL address<\/code>
\nCalls executable code, starting at the 16 bit memory address address.<\/p><\/blockquote>\n

Finally, you now have the basic credentials to do all the nice coding stuff which takes advantage of the non default settings of your PC1403. For some source code samples, take a look at those articles<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

The PC1403 basically supports the inbuilt BASIC programming language. Therefore it offers two modes: The programming mode, where the basic source code can be entered and the running mode, used for running and debugging programs. 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