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1 ********************************************************************
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2 * Date - Print Date/Time
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3 *
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4 * $Id: date.asm,v 1.1.1.1 2001/02/21 23:30:54 boisy Exp $
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5 *
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6 * Greetings; September 25, 1996
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7 *
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8 * This 'Date' module, date5, has been expanded a wee bit to
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9 * make it smart enough to handle dates to the year 2099.
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10 *
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11 * In order to have it do it in a math conversion, I would have had to
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12 * make the 8 bit math it does into 16 bit, and there aren't enough
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13 * registers in the 6809 to pull that off in a reasonable code size.
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14 * So it still does 8 bit math, but only has a 1900-2099 year total
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15 * range. This is more than the recently converted clock for the Disto
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16 * 4n1 I just uploaded, as that clock now has a range from 1980 to 2079.
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17 * A simple subtraction determines if it prints a leading 20, and the
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18 * contents of the register after the subtraction, or it reloads the
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19 * string pointer to point at 19 and reloads the year register to get
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20 * the year 00-99 to print.
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21 *
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22 * This contains no 6309 specific code, so Nitros9 and a 6309 cpu
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23 * are not required to use it, box stock is fine.
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24 *
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25 * Gene Heskett, <gene_heskett@wvlink.mpl.com>
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26 *
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27 * Ed. Comments Who YY/MM/DD
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28 * ------------------------------------------------------------------
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29 * 5 Made Y2K compliant GH 96/09/25
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30 * 6 Made compliant with 1900-2155 BGP 99/05/07
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31
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32 nam Date
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33 ttl Print Date/Time
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34
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35 ifp1
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36 use defsfile
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37 endc
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38
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39 tylg set Prgrm+Objct
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40 atrv set ReEnt+rev
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41 rev set $01
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42 edition set 6
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43
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44 mod eom,name,tylg,atrv,start,size
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45
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46 SysYear rmb 1
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47 SysMonth rmb 1
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48 SysDay rmb 1
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49 SysHour rmb 1
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50 SysMin rmb 1
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51 SysSec rmb 1
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52 u0006 rmb 2
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53 u0008 rmb 440
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54 size equ .
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55
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56 name fcs /Date/
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57 fcb edition
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58
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59 DtComa fcs ', '
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60 MonTable fcs '??? '
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61 fcs 'January '
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62 fcs 'February '
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63 fcs 'March '
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64 fcs 'April '
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65 fcs 'May '
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66 fcs 'June '
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67 fcs 'July '
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68 fcs 'August '
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69 fcs 'September '
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70 fcs 'October '
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71 fcs 'November '
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72 fcs 'December '
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73
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74 start pshs x
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75 leax ,u
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76 leau u0008,u
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77 stu <u0006
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78 os9 F$Time
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79 bsr PrntDate go print the date in buffer
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80 lda [,s++] now, did we have a -t
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81 eora #$54 option on the commandline?
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82 anda #$DF
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83 bne L008C wasn't a t
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84 ldd #C$SPAC*256+C$SPAC else space it out
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85 std ,u++
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86 bsr L00A1 and go add the time to the buffer
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87 L008C lda #C$CR terminate the line to print
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88 sta ,u+
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89 lda #1 standard out
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90 ldx <u0006
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91 ldy #$0028
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92 os9 I$WritLn and go print it
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93 bcs L009E
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94 clrb
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95 L009E os9 F$Exit
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96 L00A1 ldb <SysHour
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97 bsr L00D2
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98 ldb <SysMin
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99 bsr L00AB
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100 ldb <SysSec
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101 L00AB lda #$3A
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102 sta ,u+
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103 bra L00D2
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104 PrntDate leay >MonTable,pcr
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105 ldb <SysMonth
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106 beq L00C4
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107 cmpb #$0C
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108 bhi L00C4
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109 L00BD lda ,y+
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110 bpl L00BD
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111 decb
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112 bne L00BD
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113 L00C4 bsr PrtStrng
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114 ldb <SysDay
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115 bsr L00D2
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116 leay >DtComa,pcr
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117 bsr PrtStrng
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118 ldb <SysYear get year
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119 cmpb #100 compare against 100 (2000)
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120 blo is19 if less than, it's 19XX, so branch
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121 subb #100 else subtract 100
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122 cmpb #100 compare against 100
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123 blo is20 if less than, it's 20XX, so branch
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124 subb #100
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125 pshs b
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126 ldb #21
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127 bra pr
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128 is20 pshs b
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129 ldb #20
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130 bra pr
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131 is19 pshs b
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132 ldb #19
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133 pr bsr L00D2
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134 puls b
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135 L00D2 lda #$2F
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136 L00D4 inca
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137 subb #$64
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138 bcc L00D4
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139 sta ,u+
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140 cmpa #$30
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141 bne L00E1
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142 leau -1,u
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143 L00E1 lda #$3A
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144 L00E3 deca
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145 addb #$0A
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146 bcc L00E3
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147 sta ,u+
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148 addb #$30
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149 stb ,u+
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150 rts
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151
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152 * * * * * * * * * * *
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153 * make fcs strings printable
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154 PrtStrng lda ,y
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155 anda #$7F
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156 sta ,u+
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157 lda ,y+
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158 bpl PrtStrng
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159 rts
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160
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161 * * * * * * * * * * *
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162 * all done here folks
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163 emod
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164 eom equ *
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165 end
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166
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