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1 ********************************************************************
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2 * KernelP4 - User Register Dump System Call for NitrOS9 Level 2
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3 *
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4 * $Id$
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5 *
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6 * Copyright February,1989 by Ron Lammardo
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7 *
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8 * This system call can be used in an application program to dump the
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9 * current contents of all user registers in Hex,Decimal,Binary and Ascii
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10 * (Registers "A" and "B" Only). This module MUST be present in the
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11 * bootfile. If no KernelP3 module is found,change the "mname" and "nextname"
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12 * as appropriate.
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13 *
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14 * If there is a conflict with the code used for this system called, it can
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15 * be changed by resetting the equate at "F$RegDmp"
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16 *
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17 * NOTE: All registers EXCEPT 'CC' are preserved....NitrOS9 internally resets
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18 * the condition code register upon service call exit.
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19 *
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20 * Edt/Rev YYYY/MM/DD Modified by
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21 * Comment
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22 * ------------------------------------------------------------------
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23 * 1 1989/02/?? Ron Lammardo
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24 * Started.
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25
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26 nam KernelP4
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27 ttl User Register Dump System Call for NitrOS9 Level 2
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28
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29 ifp1
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30 use defsfile
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31 endc
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32
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33 tylg set systm+objct
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34 atrv set reent+revision
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1289
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35 revision set 0
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36 edition set 1
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37
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38 mod eom,name,tylg,atrv,start,0
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39
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40 name fcs /KernelP4/ name of this module
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41 fcb edition
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42
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43 svctabl fcb F$RegDmp F$RegDmp code
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44 fdb regdmp-*-2 offset to actual code
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45 fcb $80 end of table
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46
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47 start leay <svctabl,pcr point to service table
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48 os9 F$SSvc insert the new op code in the table
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49 lda #tylg get next module type (same as this one!)
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50 leax <nextname,pcr get address of next module name
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51 os9 F$Link attempt to link to it
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52 bcs endsetup no good...skip this
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53 jsr ,y else go execute it
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54 endsetup rts return back to previous module
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55
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56 nextname fcc /KernelP5/ next module name to link to
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57 fcb $0d
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58
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59 regdmp equ *
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60 IFNE H6309
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61 pshs cc,a,b,e,f,dp,x,y,u save all registers
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62 ELSE
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63 pshs cc,a,b,dp,x,y,u save all registers
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64 ENDC
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65 tfr u,y transfer addresses
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66 leas -60,s back up for some variable storage
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67 leau 4,s buffer starts here
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68 clr ,u+ set flag to print ascii char
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69 lda #$20 get a space
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70 ldb #50 number of chars to clear
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71 tfr u,x set register for loop
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72
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73 clrloop sta ,x+ initialize a space
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74 decb decrement counter
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75 bne clrloop if more..loop back & clear another
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76 lbsr reg060 send a <cr>
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77 leax reg080,pcr point to start of control table
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78 clra clear msb of register
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79 ldb R$A,y get register from stack
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80 bsr reg000 dump register A
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81 ldb R$B,y get register from stack
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82 bsr reg000 dump register B
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83 IFNE H6309
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84 ldb R$E,y get register from stack
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85 bsr reg000 dump register E
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86 ldb R$F,y get register from stack
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87 bsr reg000 dump register F
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88 ENDC
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89 inc -1,u turn off ascii char print flag
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90 ldd R$X,y get register from stack
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91 bsr reg000 dump register X
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92 ldd R$Y,y get register from stack
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93 bsr reg000 dump regisetr Y
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94 ldd R$U,y get register from stack
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95 bsr reg000 dump register U
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96 ldb R$CC,y get register from stack
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97 bsr reg000 dump register CC
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98 ldb R$DP,y get register from stack
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99 bsr reg000 dump register DP
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100 ldd R$PC,y get user Task Number
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101 bsr reg000 dump register PC
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102 ldy <D.Proc get address of users process descriptor
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103 ldd P$SP,y get users stack address
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104 IFNE H6309
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105 addd #14 add on for registers which were saved
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106 ELSE
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107 addd #12 add on for registers which were saved
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108 ENDC
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109 bsr reg000 dump register S
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110 lbsr reg060 send a <CR>
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111 leas 60,s restore stack pointer
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112 IFNE H6309
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113 puls cc,a,b,e,f,dp,x,y,u,pc restore all registers and return
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114 ELSE
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115 puls cc,a,b,dp,x,y,u,pc restore all registers and return
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116 ENDC
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117
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118 * Dump a register in "D"
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119 * X = Control Table Location
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120 * U = Output buffer Location
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121
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122 reg000 pshs y save y register
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123 tfr d,y register in y
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124 lda ,x # of bytes
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125 leax 3,x point past table entry
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126 pshs a,x,y,u save registers
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127 ldd -2,x get register name
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128 std ,u++ move to buffer
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129 ldd #"=$ get chars
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130 std ,u++ move to buffer
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131 ldd 3,s get reg
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132 lbsr gethex convert to hex
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133 tst 0,s 1 byte ?
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134 bne reg010 no...skip this
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135 ldd 2,u get 2 lsb's
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136 std ,u store in msb's
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137 ldd #$2020 get two blanks
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138 std 2,u store in lsb's
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139
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140 reg010 ldd #$2023 get a space and "#"
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141 std 4,u move in two spaces
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142 leau 6,u point to start of decimal output buffer
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143 ldd 3,s get register
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144 lbsr getdec convert to decimal
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145 tst 0,s is it one byte
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146 bne reg020 no..skip this
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147 ldd 2,u else get third & fourth chars
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148 std ,u store as first two
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149 lda 4,u get fifth char
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150 sta 2,u store as third
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151 ldd #$2020 get two spaces
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152 std 3,u store as 4th & 5th chars
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153
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154 reg020 ldd #$2025 get a blank & "%"
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155 std 5,u move it to buffer
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156 leau 7,u point to start of binary output area
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157 tfr a,b space in 'b'
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158 std 16,u space out ascii char
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159 ldd 3,s get register
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160 bsr getbin convert to binary
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161 tst 0,s check byte count
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162 bne reg040 skip if two bytes
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163 ldb #8 loop counter
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164
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165 reg030 lda 8,u get two chars from second 8 digits
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166 sta ,u+ store in first 8 digits
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167 lda #$20 get two blanks
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168 sta 7,u store in second 8 digits
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169 decb decrement counter
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170 bne reg030 loop back if not done
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171 leau -8,u back up to beginning of binary digit output
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172 ldb 4,s get lsb of register
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173 tst -18,u check if we want to print ascii char
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174 bne reg040 nope..skip this
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175 cmpb #$20 compare char with space
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176 blo reg040 if lower..skip this
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177 cmpb #'z compare with last alpha char
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178 bhi reg040 if higher..skip this
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179 stb 17,u else store the char
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180
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181 reg040 lda #C$CR get a <cr>
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182 sta 18,u and store it
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183 leax -17,u back up to buffer start
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184 bsr reg070 send it
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185 clra clear msb for next reg
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186 puls b,x,y,u restore registers
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187 puls y,pc restore y & return
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188
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189 reg050 fcb $0d
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190
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191 reg060 leax <reg050,pcr point to <cr>
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192
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193 reg070 pshs x,y,u,a,b save registers
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194 ldy <D.Proc get process descriptor address
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195 lda P$Path+2,y get user error path number
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196 pshs a save it
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197 ldu P$SP,y get user stack address
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198 leau -50,u back off to make room
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199 lda <D.SysTsk get system task number
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200 ldb P$Task,y get users task number
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201 ldy #40 chars to move
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202 os9 F$Move move from system to user space
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203 tfr u,x restore buffer address
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204 puls a restore user error path number
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205 os9 I$WritLn send it
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206 puls x,y,u,a,b,pc restore registers & return
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207
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208 * Control Table - Format is :
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209 * Byte count (0=1,1=2)
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210 * Register name (Two chars)
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211
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212 reg080 fcb 0
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213 fcc /a /
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214 fcb 0
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215 fcc /b /
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216 IFNE H6309
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217 fcb 0
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218 fcc /e /
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219 fcb 0
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220 fcc /f /
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221 ENDC
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222 fcb 1
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223 fcc /x /
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224 fcb 1
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225 fcc /y /
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226 fcb 1
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227 fcc /u /
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228 fcb 0
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229 fcc /cc/
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230 fcb 0
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231 fcc /dp/
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232 fcb 1
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233 fcc /pc/
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234 fcb 1
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235 fcc /s /
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236
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237
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238 * Convert "D" to binary digits in buffer "U"
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239
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240 getbin pshs u,b save 'u', second byte of register
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241 bsr bin010 convert first byte
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242 puls a get second byte
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243 bsr bin010 convert it
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244 puls u,pc restore 'u' and return
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245
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246 bin010 bita #%10000000 check bit
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247 bsr bin020 print result
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248 bita #%01000000
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249 bsr bin020
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250 bita #%00100000
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251 bsr bin020
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252 bita #%00010000
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253 bsr bin020
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254 bita #%00001000
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255 bsr bin020
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256 bita #%00000100
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257 bsr bin020
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258 bita #%00000010
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259 bsr bin020
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260 bita #%00000001
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261
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262 bin020 beq bin030 skip this if bit was set
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263 ldb #'1 else get an ascii '1'
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264 bra bin040 skip next
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265
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266 bin030 ldb #'0 bit not set...get an ascii '0'
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267
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268 bin040 stb ,u+ store the ascii char
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269 rts
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270
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271 * Convert "D" to 4 hex digits in buffer "U"
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272
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273 gethex pshs u,b save 'u',second register byte
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274 bsr gth010 convert first byte
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275 puls a restore second byte
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276 bsr gth010 convert it
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277 puls u,pc restore 'u' and return
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278
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279 gth010 pshs a save the byte
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280 lsra shift left 4 bits to right
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281 lsra
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282 lsra
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283 lsra
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284 bsr gth020 convert to hex digit
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285 puls a restore the byte
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286 anda #$0f strip off high 4 digits
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287
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288 gth020 adda #'0 make it ascii
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289 cmpa #$3a is it a letter
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290 blt gth030 nope..skip this
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291 adda #7 else add bias
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292
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293 gth030 sta ,u+ store the ascii character
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294 rts return
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295
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296 * Convert "D" to 5 decimal digits in buffer at "U"
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297 getdec pshs x,y,u save registers
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298 ldx #10000 get decimal number for subtraction
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299 bsr gtd010 get the decimal digit
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300 ldx #01000
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301 bsr gtd010
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302 ldx #00100
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303 bsr gtd010
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304 ldx #00010
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305 bsr gtd010
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306 ldx #00001
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307 bsr gtd010
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308 puls x,y,u,pc restore registers & return
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309
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310 gtd010 pshs x,a save x register & extra byte
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311 clr ,s clear counter
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312
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313 gtd020 cmpd 1,s compare 'd' with 'x' on stack
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314 blo gtd030 less...skip this
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315 subd 1,s else subtract number on stack
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316 inc ,s increment digit counter
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317 bra gtd020 and loop back
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318
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319 gtd030 std 1,s save remainder of number
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320 ldb ,s+ get counter
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321 addb #$30 make it ascii
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322 stb ,u+ and move it as output
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323 puls d,pc restore remainder & return
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324
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325 emod
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326 eom equ *
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327 end
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