83Plus:BCALLs:4015

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Contents 1 Synopsis 1.1 Inputs 1.2 Outputs 1.3 Registers Destroyed 2 Comments

Synopsis

Official Name: KbdScan

BCALL Address: 4015

This routine scans the keyboard for any key presses and updates the memory location kbdScanCode.

Inputs

• none

Outputs

• (kbdScanCode)=scan code of key press

Registers Destroyed

• All

Comments

Normally this BCALL is called by the interrupt routine. If interrupts are not enabled, this can be used prior to the Getcsc BCALL to achieve the same results.