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author boisy
date Fri, 05 Sep 2003 13:28:04 +0000
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********************************************************************
* Inkey - Key detect subroutine
*
* $Id$
*
* Edt/Rev  YYYY/MM/DD  Modified by
* Comment
* ------------------------------------------------------------------
*          ????/??/??
* From Tandy OS-9 Level One VR 02.00.00.
*
*   1      1998/10/26  Boisy G. Pitre
* Put a proper edition number after the name.

         nam   Inkey
         ttl   Key detect subroutine

* Disassembled 98/09/11 11:55:29 by Disasm v1.6 (C) 1988 by RML

         ifp1
         use   defsfile
         endc

tylg     set   Sbrtn+Objct   
atrv     set   ReEnt+rev
rev      set   $00
edition  set   1

         mod   eom,name,tylg,atrv,start,size

u0000    rmb   0
size     equ   .

name     fcs   /Inkey/
         fcb   edition

start    leax  $04,s
         ldd   $02,s
         cmpd  #$0001
         beq   L0033
         cmpd  #$0002
         bne   L0057
         ldd   [<$04,s]
         ldx   $06,s
         leax  -$01,x
         beq   L0031
         leax  -$01,x
         bne   L0057
         tfr   b,a
L0031    leax  $08,s
L0033    ldu   $02,x
         ldx   ,x
         ldb   #$FF
         stb   ,x
         cmpu  #$0002
         bcs   L0043
         stb   $01,x
L0043    ldb   #SS.Ready
         os9   I$GetStt 
         bcs   L0052
         ldy   #0001
         os9   I$Read   
         rts   
L0052    cmpb  #E$NotRdy
         bne   L0059
         rts   
L0057    ldb   #E$ParmEr
L0059    coma  
         rts   

         emod
eom      equ   *
         end