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Text File  |  1987-07-22  |  3KB  |  74 lines
  1. üDEBUGGER'SוALORE Çbyפichardיarsmakers
  2.  
  3. Anyone⇩who⇩programs⇩onβπomputerΦasβ∈eed⇩for⇩a⇩specific
  4. programmer's⇩toolπalledβºdebugger'.⇩In⌠his⇩article,⇩I⇩am
  5. going⇩to⇩haveβ∮ookβt⌠woτoodΣebuggersµor⌠heIJtari⇩ST⇩-
  6. "RAID"βnd⌠heסublicגomain≡rogramóTemplemon".
  7.  
  8. -קemplemon
  9.  
  10. In∩ne∩f⌠he÷eryσarliestΘssues∩f üSTמEWSÇ,⇩Volumeõחssue⇩4
  11. toΓeϕore≡recise,חβlready≡ublishedβ≤oftware≥eview∩f⌠his
  12. usefulסD≡rogramΘnβnσarlier÷ersion.⇩I⌠hinkΘt'sβbout⌠ime
  13. that⇩a⇩full≥eview≤houldβppear∩f⇩version⇩1.6,⇩the⇩latest
  14. versionβvailableβsµarβsחδnow.
  15.  
  16. AfterσxecutingóTemplemon",⇩nothing≤eems⌠oΦaveΦappened.קhe
  17. desktopβppears∮ikeΘt⌡suallyΣoesβnd∈oβpparent⌠hings⇩seem
  18. to⇩haveΦappened.⇩ButΩust⌠ry≡ressingIJLT-HELP⇩(you⇩needn't
  19. worry⇩aboutΘnflicting∙our≡rinter⌠o≡roduceβ⇩hardcopy)⇩and
  20. you'll∈otice⌠he≤trange⌠hingβboutóTemplemon":⇩It's⇩entered
  21. through⌠heΦardcopy≥outine÷ector!
  22.  
  23. Obviously,⇩ThomasקempelmannΦasσxaminedΦisקOS∩nceβndµound
  24. out⌠hat⌠hereΦappens⌠oΓeβ∈on-documented≤ystem÷ariable⇩on
  25. $502⇩that⇩comprisesβ÷ector⌠o⌠he≥outine⌠oΓe⇩executed⇩on
  26. ALT-HELP.⇩Anyway,⇩he⇩madeβϕachinelanguage⇩debugger⇩working
  27. through⇩that÷ector≈hichΘs±uiteτood¡óTemplemon"⇩was⇩thus
  28. born.
  29.  
  30. "Templemon"πanΣisassemble,µill,πopy,∮oadβnd≤ave,βnd⌠here
  31. are⇩a∮ots∩fϕoreµeatures.⇩ItΘs,⇩forσxample,⇩possible⇩to
  32. change≥egisterπontents,⇩trace,≤aveΓytes∩r≤trings⌠oϕemory
  33. and⇩lots⇩more.⇩The∩nlyµew⌠hings⌠hatח≥eally⇩find⇩to⇩be
  34. missing⇩are⇩options⇩toβssembleβndβn⇩option⇩to⇩'load⇩for
  35. execution'.⇩A⇩very⇩nice∩ptionΘs⌠hatΘtΘs≡ossible⇩to⇩use
  36. combinedπommands:⇩DפסC,µorσxample,Σisassemblesϕemoryµrom
  37. the⇩contents⇩of⇩the⇩program⇩counter⇩register.⇨Concluding,
  38. "Templemon"Θs∩ne∩f⌠heΓestΣebuggersπurrentlyβvailable⇩for
  39. the⇩ST,⇩written⇩by⇩one∩f⌠heºfastest'≡eople⇩back⇩on⇩the
  40. CommodoreÀ4.
  41.  
  42.  
  43.  
  44.  
  45. -פAID
  46.  
  47. LarryאankβndIJdamצcherer∩fºItתorks!צoftware'Φave≥ecently
  48. developed⇩a⇩debugger⇩calledפAID.⇩It∩ffers⇩about⇩the⇩same
  49. optionsβsóTemplemon",⇩butβlsoΘncludesβn∩ption⌠o⇩assemble
  50. and¡∙es!¡βn∩ption⌠o∮oadβµileµorσxecution.
  51.  
  52. UnlikeóTemplemon",⇩"RAID"Θs∈ormallyσxecutedβndσnteredµrom
  53. theΣesktop¡∈o≡ressing∩fIJLT-HELP∩r≤uch.חf∙ou≈antβµile
  54. toΓeΣebugged,⇩youπan≤implyºloadΘtµorσxecution'βnd⇩jump
  55. to⌠he⌠extΓaseβddress,βfter≈hichΘt≤tarts.מotβll≡rograms
  56. canΓeΣebugged⌡sing⌠hisϕethod,⇩however.קheϕostΘnteresting
  57. thingβboutóRAID"Θs⌠hatΘtΘs≡ossible⌠oτetΓackΘntoóRAID"
  58. afterβµileΘsΓeingσxecutedµromóRAID".⇩The≈ay⌠hisΘsΣone
  59. isϕuchϕoreµull-proof⌠hanקhomas'≈ay¡óRAID"⌡ses⌠he⇩RS232
  60. ringerΘnterrupt⌠oΣetectΘf⌠he⌡ser≈ants⌠o≥e-enter⇩"RAID".
  61. If≡insØ0βndØ2∩f⌠heפS232≡ort∩rπonnected,⇩POP!,⌠he⌡ser
  62. is⇩back⇩inóRAID".⇩AllΘnterrupts⇩continue,⇩and⇩the⇩actual
  63. program⇩screenΘs∈otβffected¿just⇩like⇩"Templemon",⇩"RAID"
  64. usesβ≤eperate≈orkscreen).⇩This≈ayΘsβlso∈otµull-proof,βs
  65. some⇩programs≤hutΣownβllΘnterrupt÷ectors¡βlso⇩the⇩RS232
  66. ringerΘnterrupt÷ector.
  67. Principally,ח∮ikeóTemplemon"ϕore⌠hanóRAID",βndΘt≈ouldΓe
  68. better⇩than⌠he∮atterΘfΘtΦad⌠heΣe-luxe⇩trace⇩option,⇩an
  69. assemble⇩option⇩and⇩a⇩'load⇩for⇩execution'⇩option.⇨Also,
  70. "Templemon"Θsסublicגomain¿canΓe∩rdered⌠hrough⌠he üST⇩NEWSÇ
  71. PD⇩serviceβs≈ell¡≥efer⌠o⌠heβrticleβbout∩ur⇩PD⇩library
  72. for⌠hat).
  73.  
  74.