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31
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1 ********************************************************************
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2 * DirM - Show module directory
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3 *
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4 * $Id: dirm.asm,v 1.1.1.1 2001/02/21 23:30:54 boisy Exp $
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5 *
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6 * Changes:
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7 *
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8 * Added internal print buffer, so an I$Write call is not performed for every
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9 * byte printed out. Halves printout time.
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10 *
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11 * Added SS.ScSiz check, and goes to 32-column output if display is 40 columns
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12 * or less.
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13 *
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14 * Ed. Comments Who YY/MM/DD
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15 * ------------------------------------------------------------------
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16 * ? Disassembled at 8:18:38 AD 94/11/10
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17 * 5 Added internal print buffer, so an I$Write AD ??/??/??
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18 * call is not performed for every byte printed
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19 * out. Halves printout time. Added SS.ScSiz
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20 * check, and goes to 32-column output if display
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21 * is 40 columns or less.
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22
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23 nam DirM
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24 ttl Show module directory
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25
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26 ifp1
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27 use defsfile
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28 endc
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29
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30 tylg set Prgrm+Objct
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31 atrv set ReEnt+rev
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32 rev set $01
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33 edition set 5
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34
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35 Bound equ 40 width at which change is made to 32-col printing
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36
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37
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38 mod eom,name,tylg,atrv,start,size
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39
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40 MD.DAT rmb 2
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41 MD.Crnt rmb 2
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42 MD.Strt rmb 2
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43 MD.End rmb 2
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44 MD.MPDAT rmb 5
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45 PntCnt rmb 1
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46
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47 *Single rmb 1 single entry/line?
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48 Width rmb 1 width of the output device
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49
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50 PBuffer rmb 31 internal print buffer
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51 Buffer rmb 40 room for a name buffer
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52 MD.Data rmb 2048 size of the module directory
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53 rmb 200 for the stack
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54 size equ .
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55 name equ *
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56 fcs /DirM/
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57 fcb edition
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58
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59 H2 fcc / Bk Ofst Size Ty At Link Name/
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60 fcb $0d
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61 H3 fcc / -- ---- ---- -- -- ---- -----/
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62 H1 fcb $0d
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63
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64 * Believe it or not, all this internal crap is still smaller than having
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65 * a different version of the header for 32/80 columns.
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66 Dump ldu #PBuffer output print buffer
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67 lda ,x+ get first character
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68 sta ,u+ move it over
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69 ldb <Width get the width
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70
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71 D.01 cmpa #C$CR CR?
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72 beq D.Print yup, dump it out
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73
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74 lda ,x+ grab a character
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75 sta ,u+ save it
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76 cmpa #C$SPAC was it a space?
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77 bne D.01 no, just save it
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78
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79 cmpb #Bound 40-column screen?
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80 bls D.01 yes, don't add the space
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81 sta ,u+ if a space, save another copy of it
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82 bra D.01
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83
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84 D.Print lda #$01 to STDOUT
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85 ldx #PBuffer
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86 ldy #50 max. size of data to print
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87 OS9 I$WritLn dump it out
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88 bcs Exit
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89 rts
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90
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91 start equ *
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92 stu <MD.DAT u=$0000 always on startup in OS-9 LII
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93 ldd #$0100+SS.ScSiz stdout, get screen size
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94 OS9 I$GetStt
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95 bcs s.01
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96 tfr x,d
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97 bra s.02 save actual screen size
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98
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99 s.01 cmpb #E$UnkSvc
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100 bne Exit
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101 ldb #80 default to 80 columns if error
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102 s.02 stb <Width
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103
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104 leax <H1,pcr print out initial CR
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105 bsr Dump
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106 leax >H2,pcr header of names
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107 bsr Dump
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108 leax <H3,pcr and hyphens
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109 bsr Dump
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110
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111 ldx #MD.Data
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112 os9 F$GModDr
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113 bcs Exit
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114 stu <MD.Strt save start address of system module dir
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115
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116 sty <MD.End save end of the module directory
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117 bra L00B5
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118
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119 ClnExit clrb
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120 Exit os9 F$Exit
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121
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122 L00AD ldx <MD.Crnt
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123 leax MD$ESIZE,x go to the next entry
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124 cmpx <MD.End
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125 bcc ClnExit
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126
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127 L00B5 stx <MD.Crnt
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128 ldu #PBuffer temporary print buffer
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129 ldd MD$MPDAT,x get module DAT image
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130 beq L00AD if zero, skip this entry
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131 pshs d
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132 cmpd <MD.DAT
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133 beq L00CD
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134 std <MD.DAT save the current DAT image
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135 lda #'- start of this block
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136 fcb $8C skip 2 bytes
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137
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138 L00CD lda #C$SPAC space
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139 sta ,u+ store it in the data buffer
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140 L00D0 puls d restore current DAT image
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141 subd <MD.Strt take out start of the block
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142 ldy #MD.Data point to module directory data
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143 leay d,y to the DAT image within it
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144 tfr y,d
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145 std <MD.MPDAT save pointer to DAT
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146 lda MD$MPtr,x module pointer
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147 lsra
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148 lsra
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149 lsra
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150 lsra turn address into block offset
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151 anda #$0E keep low bits only
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152 inca DAT image is (junk),(block)
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153 lda a,y get the starting block number
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154 bsr L0165 dump it out
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155 ldd MD$MPtr,x get real pointer
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156 anda #$1F get offset inside block
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157 bsr L0159 print it out
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158 ldx MD$MPtr,x and get pointer again
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159
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160 pshs u save print buffer pointer
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161 ldu #Buffer to a name buffer
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162 ldy #$000A move first 10 bytes of the module?
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163 ldd <MD.MPDAT
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164 os9 F$CpyMem copy it over
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165 puls u restore print buffer ptr
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166 bcs Exit
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167
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168 ldd <Buffer+M$Size
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169 bsr L0159 print out the size of the module
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170 lda <Buffer+M$Type
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171 bsr L0165 print out the Ty/Lg
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172 lda <Buffer+M$Revs
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173 bsr L0165 print out At/Rv
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174 ldx <MD.Crnt get current module pointer
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175 ldd MD$Link,x link count
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176 bsr L0159
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177 ldd <Buffer+M$Name
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178 ldx <MD.Crnt
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179 ldx MD$MPtr,x start address of the module
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180 leax d,x point to the name
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181
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182 pshs u save print buffer ptr
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183 ldu #Buffer to the buffer again
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184 lda <Width
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185 cmpa #Bound
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186 bhi n.01
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187 leau -6,u discount 6 spaces
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188
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189 n.01 ldd <MD.MPDAT
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190 ldy #$0028 copy over 40 bytes of the name
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191 os9 F$CpyMem
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192 tfr u,x save copy of the start of the buffer
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193 puls u restore print buffer ptr
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194 lbcs Exit
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195
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196 ldb #39 maximum number of characters to check
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197 L013F lda ,x+ get a character
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198 bpl L013F if it's OK
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199 anda #$7F force it to be printable
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200 sta -$01,x save it again
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201 lda #C$CR drop a CR after the last character of the name
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202
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203 sta ,x save it
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204 ldx #PBuffer point to the start of the buffer
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205 ldy #$0040 64 characters
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206 lda #$01
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207 os9 I$WritLn print out the name
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208 lbra L00AD start all over again
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209
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210 * Print out a 2-byte hex number in D
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211 L0159 pshs b save low order character
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212 ldb #$03 3 digits to print out
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213 bsr L0171 print out A
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214 puls a restore low byte
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215 bsr L0173 print it, too
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216 bra L0167 and dump out 2 spaces
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217
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218 * print out a 1-digit hex number in A
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219 L0165 bsr L016F
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220 L0167 lda <Width check the width
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221 cmpa #Bound
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222 bls L016B if 40 columns or smaller, don't print extra space
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223 lda #C$SPAC space
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224 sta ,u+
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225 L016B lda #C$SPAC and another space
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226 sta ,u+
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227 rts
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228
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229 L016F ldb #$01
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230 L0171 stb <PntCnt
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231 L0173 tfr a,b save a copy of the number in B
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232 lsra
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233 lsra
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234 lsra
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235 lsra move high nibble into the lower nibble
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236 bsr L017D print out lower nibble of A as hex number
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237 tfr b,a restore lower nibble
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238
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239 L017D anda #$0F make 0-15
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240 beq L019C if zero, skip printing it out
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241 clr <PntCnt
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242 cmpa #$0A higher than A?
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243 bcs L0189 no, add in ascii zero
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244 adda #$07 yes, add difference between 9 and A
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245 L0189 adda #'0 turn it into an ascii number
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246
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247 Print sta ,u+ save the character in the buffer
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248 rts
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249
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250 L019C dec <PntCnt count down of number of characters to print
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251 bmi L0189 if last one, print out a zero
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252 bra L016B otherwise print out a space
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253
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254 emod
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255 eom equ *
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256 end
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