Ira Goldklang's TRS-80 Revived Site

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Model III BASIC Tips/Tricks

by @ 3:27 pm on February 5, 2010.
[Model I]      [Model III]
TRS-80 Model III Tips & Tricks
     		[Model IV]      [Model 100]


Model III BASIC Pokes
Action      Address      Value
Toggle CAPS LOCK      16409      0 = On
Anything Else = Off
Toggle Cursor Blink      16412      0 = Blink
Anything Else = Stationary
Cursor Character      16419      ASCII Value of What You Want
Cassette Speed      16913      0 = 500 Baud
Anything Else = 1500 Baud
The PEEK is actually the ascii value of what you hit
Video Scroll Protect      16916      0-7 = Number of Lines to Scroll Protect


Passing and Getting Values from a USR Call
To return a value to a USR Function Call, load the value into HL and then JP 0A9AH
To keep the value of a USR Function Call, at the beginning of the routine CALL 0A7FH and it will be stored in HL

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