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216
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1 ********************************************************************
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2 * Inkey - Key detect subroutine
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3 *
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4 * $Id$
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5 *
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6 * Ed. Comments Who YY/MM/DD
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7 * ------------------------------------------------------------------
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8 * ? Original Tandy/Microware version
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9 * 1 Put a proper edition number after the name BGP 98/10/26
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10
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11 nam Inkey
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12 ttl Key detect subroutine
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13
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14 * Disassembled 98/09/11 11:55:29 by Disasm v1.6 (C) 1988 by RML
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15
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16 ifp1
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17 use defsfile
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18 endc
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19
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20 tylg set Sbrtn+Objct
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21 atrv set ReEnt+rev
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22 rev set $01
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23 edition set 1
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24
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25 mod eom,name,tylg,atrv,start,size
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26
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27 u0000 rmb 0
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28 size equ .
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29
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30 name fcs /Inkey/
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31 fcb edition
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32
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33 start leax $04,s
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34 ldd $02,s
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35 cmpd #$0001
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36 beq L0033
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37 cmpd #$0002
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38 bne L0057
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39 ldd [<$04,s]
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40 ldx $06,s
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41 leax -$01,x
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42 beq L0031
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43 leax -$01,x
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44 bne L0057
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45 tfr b,a
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46 L0031 leax $08,s
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47 L0033 ldu $02,x
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48 ldx ,x
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49 ldb #$FF
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50 stb ,x
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51 cmpu #$0002
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52 bcs L0043
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53 stb $01,x
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54 L0043 ldb #SS.Ready
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55 os9 I$GetStt
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56 bcs L0052
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57 ldy #0001
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58 os9 I$Read
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59 rts
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60 L0052 cmpb #E$NotRdy
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61 bne L0059
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62 rts
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63 L0057 ldb #E$ParmEr
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64 L0059 coma
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65 rts
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66
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67 emod
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68 eom equ *
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69 end
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70
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