83Plus:BCALLs:500B

Synopsis

Official Name: GetKeyRetOff

BCALL Address: 500B

Gets a keypress from the keyboard. Similar to GetKey, the 2nd+off key combination will return kOff to the caller, instead of turning the calculator off.

Inputs

None

Outputs

• A: keycode for key pressed.
• (keyExtend) = extended keycode
• bit onInterrupt, (iy+onFlags) set (and A=0) if the On key was pressed
• bit 7,(iy+28h) set
• (iy+shiftFlags) contains shift settings

Registers Destroyed

• DE, HL
• B, in some cases (mostly when some 2nd key combination is pressed; needs further testing to determine the exact circumstances)

Comments

This function will wait until the user presses a key or key combination, and will APD or accept silent link if they are enabled. Functionally it is the same thing as calling regular GetKey, except with the 7,(iy+28h) flag set first. See ti83plus.inc for the list of return keycodes.