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
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