A86: Key Presses

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A86: Key Presses

Hello all you smart ASM programmers,
 
    I'm a newbie at this and I'm having trouble reading multiple keypresses.  I am reading the presses by writing to port 1 and reading from port 1 and I can read one key just fine, but I've heard that one can read more than one key press with the ports, but I am unsure how to do this.  Is reading the port the best way to do this or is _getky or _getkey better?  I'm trying to let them press +, -, or exit.  Here's my code:
 
Getkeypress:
    ld a,%01111101
    out (1),a
    nop
    nop
    in a,(1)
    bit 1,a
    jr nz, Getkeypress
 
    After that code it goes on to something that will change the contrast up, but I want to know how to make little routines for inc-ing the contrast, dec-ing the contrast, and ret-ing to the OS.
    Am I making sense?
 
Bryan
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