4 \ Originally written by Bill Muench.
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5 \ Adapted to hForth by Wonyong Koh
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8 \ HAT ( user_size ds_size rs_size "<spaces>name" -- )
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9 \ Run-time: ( -- tid )
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10 \ Create a new task.
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12 \ Initialize and link new task into PAUSE chain.
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13 \ ACTIVATE ( tid -- )
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14 \ Activate the task identified by tid. ACTIVATE must be used
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15 \ only in definition. The code following ACTIVATE must not
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16 \ EXIT. In other words it must be infinite loop like QUIT.
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18 \ Display tasks list in status-follower chain.
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20 \ Sleep another task.
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22 \ Awake another task.
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24 \ Stop current task and transfer control to the task of which
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25 \ 'status' USER variable is stored in 'follower' USER variable
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28 \ Sleep current task.
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31 \ Facelift to be used with other CPUs.
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33 \ Fix ACTIVATE. sp@ should return a value not larger than sp0.
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37 NONSTANDARD-WORDLIST SET-CURRENT
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39 \ Structure of a task created by HAT
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40 \ userP points follower.
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41 \ //userP//return_stack//data_stack
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42 \ //user_area/user1/taskName/throwFrame/stackTop/status/follower/sp0/rp0
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44 \ 'PAUSE' and 'wake' are defined in assembler source.
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47 \ Stop current task and transfer control to the task of which
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48 \ 'status' USER variable is stored in 'follower' USER variable
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50 \ CHAR " PARSE systemID" ENVIRONMENT? DROP
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51 \ CHAR " PARSE hForth 8086 ROM Model" COMPARE 0=
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52 \ CHAR " PARSE systemID" ENVIRONMENT? DROP
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53 \ CHAR " PARSE hForth 8086 RAM Model" COMPARE 0= OR
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55 \ : PAUSE rp@ sp@ stackTop ! follower @ >R ; COMPILE-ONLY
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57 \ CHAR " PARSE systemID" ENVIRONMENT? DROP
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58 \ CHAR " PARSE hForth 8086 EXE Model" COMPARE 0=
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60 \ : PAUSE rp@ sp@ stackTop ! follower @ code@ >R ; COMPILE-ONLY
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64 \ Wake current task.
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65 \ CHAR " PARSE systemID" ENVIRONMENT? DROP
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66 \ CHAR " PARSE hForth 8086 ROM Model" COMPARE 0=
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67 \ CHAR " PARSE systemID" ENVIRONMENT? DROP
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68 \ CHAR " PARSE hForth 8086 RAM Model" COMPARE 0= OR
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70 \ : wake R> userP ! \ userP points 'follower' of current task
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71 \ stackTop @ sp! \ set data stack
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72 \ rp! ; COMPILE-ONLY \ set return stack
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74 \ CHAR " PARSE systemID" ENVIRONMENT? DROP
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75 \ CHAR " PARSE hForth 8086 EXE Model" COMPARE 0= OR
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77 \ : wake R> CELL+ code@ userP ! \ userP points 'follower' of current task
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78 \ stackTop @ sp! \ set data stack
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79 \ rp! ; COMPILE-ONLY \ set return stack
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83 \ Sleep current task.
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84 CHAR " PARSE model" ENVIRONMENT? DROP
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85 CHAR " PARSE ROM Model" COMPARE 0=
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86 CHAR " PARSE model" ENVIRONMENT? DROP
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87 CHAR " PARSE RAM Model" COMPARE 0= OR
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89 : STOP ['] branch status ! PAUSE ;
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91 CHAR " PARSE model" ENVIRONMENT? DROP
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92 CHAR " PARSE EXE Model" COMPARE 0=
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94 : STOP ['] branch status @ code! PAUSE ;
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97 \ 's ( tid a-addr -- a-addr' )
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98 \ Index another task's USER variable
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100 userP @ - SWAP \ offset tid
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104 \ Sleep another task.
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105 CHAR " PARSE model" ENVIRONMENT? DROP
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106 CHAR " PARSE ROM Model" COMPARE 0=
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107 CHAR " PARSE model" ENVIRONMENT? DROP
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108 CHAR " PARSE RAM Model" COMPARE 0= OR
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110 : SLEEP status 's ['] branch SWAP ! ;
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112 CHAR " PARSE model" ENVIRONMENT? DROP
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113 CHAR " PARSE EXE Model" COMPARE 0=
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115 : SLEEP status 's @ ['] branch SWAP code! ;
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119 \ Awake another task.
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120 CHAR " PARSE model" ENVIRONMENT? DROP
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121 CHAR " PARSE ROM Model" COMPARE 0=
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122 CHAR " PARSE model" ENVIRONMENT? DROP
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123 CHAR " PARSE RAM Model" COMPARE 0= OR
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125 : AWAKE status 's ['] wake SWAP ! ;
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127 CHAR " PARSE model" ENVIRONMENT? DROP
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128 CHAR " PARSE EXE Model" COMPARE 0=
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130 : AWAKE status 's @ ['] wake SWAP code! ;
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133 \ HAT ( user_size ds_size rs_size "<spaces>name" -- )
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134 \ Run-time: ( -- tid )
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135 \ Create a new task.
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136 CHAR " PARSE model" ENVIRONMENT? DROP
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137 CHAR " PARSE ROM Model" COMPARE 0=
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141 CREATE HERE >R \ user_size ds_size rs_size R: tid
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142 0 , ( reserve space for userP pointer)
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143 ALLOT ( Use 'HERE OVER ALLOT SWAP 0AA FILL')
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144 ( to see how deep return stack grows.)
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145 ALIGN HERE cell- >R \ user_size ds_size R: tid rp0
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146 ALLOT ( Use 'HERE OVER ALLOT SWAP 055 FILL')
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147 ( to see how deep data stack grows.)
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148 ALIGN HERE cell- >R \ user_size R: tid rp0 sp0
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150 [ 6 ( minimul USER variables) CELLS ] LITERAL ALLOT
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151 HERE cell- \ user_pointer R: tid rp0 sp0
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152 R> , R> , ( store sp0 and rp0 )
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153 R@ ! ( store userP pointer)
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154 lastName R> taskName 's ! \ store task name in new task's 'taskName'
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157 CHAR " PARSE model" ENVIRONMENT? DROP
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158 CHAR " PARSE RAM Model" COMPARE 0=
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161 CREATE HERE >R \ user_size ds_size rs_size R: tid
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162 0 , ( reserve space for userP pointer)
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163 ALLOT ( Use 'HERE OVER ALLOT SWAP 0AA FILL')
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164 ( to see how deep return stack grows.)
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165 ALIGN HERE cell- >R \ user_size ds_size R: tid rp0
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166 ALLOT ( Use 'HERE OVER ALLOT SWAP 055 FILL')
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167 ( to see how deep data stack grows.)
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168 ALIGN HERE cell- >R \ user_size R: tid rp0 sp0
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170 [ 6 ( minimul USER variables) CELLS ] LITERAL ALLOT
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171 HERE cell- \ user_pointer R: tid rp0 sp0
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172 R> , R> , ( store sp0 and rp0 )
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173 R@ ! ( store userP pointer)
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174 lastName R> taskName 's ! ; \ store task name in new task's 'taskName'
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176 CHAR " PARSE model" ENVIRONMENT? DROP
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177 CHAR " PARSE EXE Model" COMPARE 0=
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180 CREATE HERE >R \ user_size ds_size rs_size R: tid
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181 0 , ( reserve space for userP pointer)
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182 ALLOT ( Use 'HERE OVER ALLOT SWAP 0AA FILL')
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183 ( to see how deep return stack grows.)
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184 ALIGN HERE cell- >R \ user_size ds_size R: tid rp0
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185 ALLOT ( Use 'HERE OVER ALLOT SWAP 055 FILL')
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186 ( to see how deep data stack grows.)
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187 ALIGN HERE cell- >R \ user_size R: tid rp0 sp0
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189 [ 4 ( minimul USER variables less 'status' and 'follower') CELLS ]
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191 xhere ALIGNED DUP CELL+ CELL+ TO xhere
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192 DUP , ( store 'status' code-address)
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193 CELL+ , ( store 'follower' code-address)
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194 HERE cell- \ user_pointer R: tid rp0 sp0
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195 DUP COMPILE, ( store 'userP' pointer in code space)
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196 R> , R> , ( store sp0 and rp0 )
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197 R@ ! ( store userP pointer)
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198 lastName R> taskName 's ! ; \ store task name in new task's 'taskName'
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202 \ Initialize and link new task into PAUSE chain.
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203 CHAR " PARSE model" ENVIRONMENT? DROP
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204 CHAR " PARSE ROM Model" COMPARE 0=
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205 CHAR " PARSE model" ENVIRONMENT? DROP
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206 CHAR " PARSE RAM Model" COMPARE 0= OR
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209 DUP SLEEP \ sleep new task
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210 follower @ OVER \ current task's 'follwer'
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211 follower 's ! \ store it in new task's 'follower'
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212 status 's follower ! ; \ store new 'status' in current 'follower'
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214 CHAR " PARSE model" ENVIRONMENT? DROP
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215 CHAR " PARSE EXE Model" COMPARE 0=
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218 DUP SLEEP \ sleep new task
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219 follower @ code@ OVER
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220 follower 's @ code! \ store current task's 'follwer' in new one
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221 status 's @ follower @ code! ; \ new 'status' in current task's follower
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224 \ ACTIVATE ( tid -- )
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225 \ Activate the task identified by tid. ACTIVATE must be used
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226 \ only in definition. The code following ACTIVATE must not
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227 \ EXIT. In other words it must be infinite loop like QUIT.
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229 DUP @ CELL+ 2@ cell- \ top of stack is in BX register
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231 R> OVER ! \ save entry at rp
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232 OVER ! \ save rp at sp
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233 OVER stackTop 's ! \ save sp in stackTop
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234 AWAKE ; COMPILE-ONLY
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237 \ Display tasks list in status-follower chain.
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238 CHAR " PARSE model" ENVIRONMENT? DROP
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239 CHAR " PARSE ROM Model" COMPARE 0=
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240 CHAR " PARSE model" ENVIRONMENT? DROP
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241 CHAR " PARSE RAM Model" COMPARE 0= OR
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244 follower \ current task's follower
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246 CR DUP [ taskName follower - ] LITERAL + @ .name
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247 DUP cell- @ ['] wake = IF ." awaked " ELSE ." sleeping " THEN
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248 @ CELL+ \ next task's follower
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252 CHAR " PARSE model" ENVIRONMENT? DROP
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253 CHAR " PARSE EXE Model" COMPARE 0=
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256 follower \ current task's follower
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258 CR DUP [ taskName follower - ] LITERAL + @ .name
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259 DUP @ cell- code@ ['] wake = IF ." awaked " ELSE ." sleeping " THEN
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260 @ code@ CELL+ CELL+ code@ \ next task's follower
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269 CHAR " PARSE FILE" ENVIRONMENT?
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271 0= [IF] << CON [THEN]
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