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annotate level1/modules/clock2_disto2.asm @ 1832:4ea2e417a48e

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Fix for non-booting Alpha port.
author afra
date Sun, 08 May 2005 20:16:14 +0000
parents f389c6bca482
children
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1724
f389c6bca482 New clock2_*.asm files split from single clock2.asm for more source clarity
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1 ********************************************************************
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2 * Clock2 - Disto 2-N-1 RTC Driver
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3 *
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4 * $Id$
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5 *
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6 * Edt/Rev YYYY/MM/DD Modified by
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7 * Comment
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8 * ------------------------------------------------------------------
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9 * 1 2004/08/18 Boisy G. Pitre
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10 * Separated clock2 modules for source clarity.
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11
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12 nam Clock2
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13 ttl Disto 2-N-1 RTC Driver
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14
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15 ifp1
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16 use defsfile
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17 endc
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18
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19 tylg set Sbrtn+Objct
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20 atrv set ReEnt+rev
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21 rev set $00
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22 edition set 1
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23
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24 RTC.Base equ $FF50 Base address of clock
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25
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26 mod eom,name,tylg,atrv,JmpTable,RTC.Base
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27
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28 name fcs "Clock2"
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29 fcb edition
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30
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31 IFNE MPIFlag
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32 SlotSlct fcb MPI.Slot-1 Slot constant for MPI select code
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33 ENDC
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34
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35 JmpTable
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36 rts RTC Init
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37 nop
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38 nop
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39 bra GetTime RTC Get Time
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40 nop
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41 bra SetTime RTC Set Time
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42
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43 GetTime pshs a,cc Save old interrupt status and mask IRQs
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44 bsr RTCPre
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45
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46 bsr GetVal Get Year
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47 bsr GetVal Get Month
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48 bsr GetVal Get Day
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49 decb ldb #5
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50 stb 2,x
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51 decb
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52 lda ,x
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53 anda #3
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54 bsr GetVal1 Get Hour
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55 bsr GetVal Get Minute
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56 bsr GetVal Get Second
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57
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58 RTCPost clr >$FFD9 2 MHz (Really should check $A0 first)
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59 puls cc,b
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60
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61 IFNE MPIFlag
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62 stb >MPI.Slct Restore saved "currently" selected MPak slot
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63 ENDC
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64
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65 clrb
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66 rts
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67
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68 RTCPre orcc #IntMasks
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69
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70 IFNE MPIFlag
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71 ldb >MPI.Slct Save currently selected MPak slot on stack
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72 stb 3,s
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73 andb #$F0
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74 orb >SlotSlct,pcr Get slot to select
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75 stb >MPI.Slct Select MPak slot for clock
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76 ENDC
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77
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78 ldy #D.Time
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79 ldx M$Mem,pcr
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80 clr 1,x
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81 ldb #12
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82 clr >$FFD8 1 MHz
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83 rts
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84
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85 GetVal stb 2,x
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86 decb
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87 lda ,x read tens digit from clock
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88 anda #$0f
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89 GetVal1 pshs b save b
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90 ldb #10
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91 mul multiply by 10 to get value
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92 stb ,y save 10s value
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93 puls b set up clock for ones digit
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94 stb 2,x
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95 decb
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96 lda ,x read ones digit from clock
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97 anda #$0f
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98 adda ,y add ones + tens
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99 sta ,y+ store clock value into time packet
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100 rts
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101
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102
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103 SetTime pshs a,cc
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104 lbsr RTCPre Initialize
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105
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106 bsr SetVal Set Year
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107 bsr SetVal Set Month
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108 bsr SetVal Set Day
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109 ldd #$0805 $08 in A, $05 in B
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110 bsr SetVal1 Set Hour (OR value in A ($08) with hour)
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111 bsr SetVal Set Minute
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112 bsr SetVal Set Second
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113
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114 lbra RTCPost Clean up + return
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115
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116 SetVal clra
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117 SetVal1 stb 2,x Set Clock address
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118 decb
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119 pshs b
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120 ldb ,y+ Get current value
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121 DvLoop subb #10 Get Tens digit in A, ones digit in B
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122 bcs DvDone
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123 inca
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124 bra DvLoop
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125 DvDone addb #10
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126 sta ,x Store tens digit
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127 tfr b,a
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128 puls b Get back original clock address
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129 stb 2,x
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130 decb
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131 sta ,x Store ones digit
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132 rts
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133
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134 emod
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135 eom equ *
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136 end
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137