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The ZCPR3 System-Oriented Utilities CMDRUN Extended Command Processor (ECP) ERRORn Error Handlers LDR ZCPR3 System Segment Loader PATH Path Display and Set QUIET Display and Set the Quiet Flag REG Register Display and Manipulation SETFILE System File Assignment SHCTRL Shell Stack Display and Manipulation SHOW System Configuration Display and Error Handler Z3INS ZCPR3 System Installation Program Z3LOC ZCPR3 System Segment Locator :The ZCPR3 System-Oriented Utilities Thi≤á HEL╨á filσá contain≤ informatioε oεá thosσá ZCPR│ ì utilitie≤áá whicΦá acces≤á feature≤á oµá thσá ZCPR│áá Systeφ ì specifically. These features include: o Extended Command Processors o Error Handlers o the ZCPR3 System Segments o the ZCPR3 Command Search Path o the System Registers o the System Files o the ZCPR3 System Addresses o the ZCPR3 System Status :CMDRUN Extended Command Processor (ECP) Command: CMDRUN Syntax: CMDRUN text (this command is usually executed by ZCPR3 itself and not the user) Function: CMDRU╬á i≤ ß samplσ ExtendeΣ CommanΣ Processor«á I⌠ i≤ ì invokeΣ automaticall∙ b∙ ZCPR│ wheε thσ use≥ commanΣ i≤á no⌠ ì founΣá vißá thσ commanΣ searcΦ patΦ anΣ n∩ erro≥ handle≥á i≤ ì engaged. Thσá tex⌠á whicΦ follow≤ thσ verΓ i≤ thσá tex⌠á oµá thσ ì original command line. Options: None Comments: CMDRU╬á i≤á onl∙ ß simplσ sample«á I⌠ show≤á tha⌠á thσ ì origina∞á commanΣ linσ i≤ no≈ availablσ iε thσ commanΣá tai∞ ì buffe≥ (a⌠ 80H)«á Thσ forma∞ CMDRU╬ whicΦ thσ use≥ program≤ ì fo≥á hi≤ ZCPR│ Systeφ caε extrac⌠ thσ origina∞ commanΣá linσ ì from this buffer and manipulate it as desired. Selected Error Messages: None Examples of Use: None :ERRORn Error Handlers ERROR1 Command: ERROR1 1.0 Syntax: ERROR1 Function: ERROR▒á i≤á aε Erro≥ Handler«á Iµ thσ use≥á run≤á thi≤ ì program¼ i⌠ install≤ itselµ a≤ thσ systeφ erro≥ handler« Iµ ì ZCPR│ canno⌠ finΣ thσ CO═ filσ referenceΣ b∙ ß commanΣ verb¼ ì i⌠á invoke≤á thσá installeΣ Erro≥á Handle≥á anΣá passe≤á thσ ì commanΣ linσ t∩ it. Options: None ERROR1 Comments: ERROR▒ display≤ thσ erro≥ linσ t∩ thσ use≥ anΣ provide≤ ì hiφ witΦ fou≥ option≤ a≤ t∩ ho≈ t∩ proces≤ thi≤ line: 1. Replace the command in error with a new command 2. Skip the command in error and resume execution with the next command 3. Replace the entire command line 4« Thro≈ awa∙ thσ commanΣ linσ anΣ resumσ user control Selected Error Messages: Self-Explanatory Examples of Use: ERROR1 -- install Error Handler ERROR2 Command: ERROR2 1.0 Syntax: ERROR2 Function: ERROR2á i≤á aε Erro≥ Handler«á Iµ thσ use≥á run≤á thi≤ ì program¼ i⌠ install≤ itselµ a≤ thσ systeφ erro≥ handler« Iµ ì ZCPR│ canno⌠ finΣ thσ CO═ filσ referenceΣ b∙ ß commanΣ verb¼ ì i⌠á invoke≤á thσá installeΣ Erro≥á Handle≥á anΣá passe≤á thσ ì commanΣ linσ t∩ it. Options: None ERROR2 Comments: ERROR2 display≤ thσ erro≥ linσ t∩ thσ use≥ anΣ provide≤ ì hiφ witΦ fou≥ option≤ a≤ t∩ ho≈ t∩ proces≤ thi≤ line: 1. Replace the command in error with a new command 2. Skip the command in error and resume execution with the next command 3. Replace the entire command line 4« Thro≈ awa∙ thσ commanΣ linσ anΣ resumσ user control Unlikσ ERROR1¼ ERROR▓ i≤ screen-oriented¼ havinτ ß mucΦ ì "flashier" display. It uses the Z3TCAP for support. Selected Error Messages: Self-Explanatory ERROR2 Examples of Use: ERROR2 -- install Error Handler ERROR3 Command: ERROR3 1.0 Syntax: ERROR3 Function: ERROR3á i≤á aε Erro≥ Handler«á Iµ thσ use≥á run≤á thi≤ ì program¼ i⌠ install≤ itselµ a≤ thσ systeφ erro≥ handler« Iµ ì ZCPR│ canno⌠ finΣ thσ CO═ filσ referenceΣ b∙ ß commanΣ verb¼ ì i⌠á invoke≤á thσá installeΣ Erro≥á Handle≥á anΣá passe≤á thσ ì commanΣ linσ t∩ it. Options: None ERROR3 Comments: ERROR│á display≤ thσ namσ oµ thσ CO═ filσ whicΦ wa≤ no⌠ ì founΣ anΣ theε flushe≤ thσ commanΣ line¼á returninτá contro∞ ì to the user. Selected Error Messages: None Examples of Use: ERROR3 -- install ERROR3 ERROR4 Command: ERROR4 1.0 Syntax: ERROR4 Function: ERROR4á i≤á aε Erro≥ Handler«á Iµ thσ use≥á run≤á thi≤ ì program¼ i⌠ install≤ itselµ a≤ thσ systeφ erro≥ handler« Iµ ì ZCPR│ canno⌠ finΣ thσ CO═ filσ referenceΣ b∙ ß commanΣ verb¼ ì i⌠á invoke≤á thσá installeΣ Erro≥á Handle≥á anΣá passe≤á thσ ì commanΣ linσ t∩ it. Options: None ERROR4 Comments: ERROR┤á print≤á thσ namσ oµ thσ CO═ filσ whicΦ wa≤á no⌠ ì founΣá anΣ theε advance≤ t∩ thσ nex⌠ commanΣ iε thσá commanΣ ì linσ buffer«á Iµ therσ i≤ n∩ nex⌠ command¼á use≥ contro∞ i≤ ì resumed«á Iµá therσ i≤ ß nex⌠á command¼á commanΣá executioε ì resumes there. Selected Error Messages: None Examples of Use: ERROR4 -- install Error Handler ERRORX Command: ERRORX 1.0 Syntax: ERRORX Function: ERROR╪ disengage≤ thσ curren⌠ erro≥ handler¼ leavinτ n∩ ì erro≥á handle≥ enabled«á Thσ defaul⌠ erro≥ contro∞ facilit∙ ì oµ ZCPR│ i≤ no≈ iε effect¼á wherσ iµ aε erro≥ occur≤ iεá thσ ì commanΣá line¼á thσ commanΣ linσ froφ tha⌠ poin⌠ forwarΣá i≤ ì printed (followed by a '?'). Options: None ERRORX Comments: None Selected Error Messages: No error messages are generated by ERRORX. Examples of Use: ERRORX -- disengage any Error Handler currently enabled :LDR ZCPR3 System Segment Loader Command: LDR 1.0 Syntax: LDR ufn1,ufn2,... Function: LD╥á i≤á ßá general-purposσ Systeφ Segmen⌠á loade≥á fo≥ ì ZCPR3« I⌠ load≤ al∞ oµ thσ ZCPR│ Systeφ Segment≤ int∩ thei≥ ì appropriatσá buffers¼á checkinτ oε thei≥ forma⌠ anΣá conten⌠ ì beforσá approvinτá anΣ completinτ eacΦá load«á EacΦá Systeφ ì Segment is specified unambiguously. Options: None Comments: Thσá followinτ Systeφ Segment≤ arσ loadeΣá int∩á memor∙ ì buffers by LDR: *.ENV files - Environment Descriptors *.FCP files - Flow Command Packages *.IOP files - Input/Output Packages *.NDR files - Named Directory Files *.RCP files - Resident Command Packages *.Z3T files - Z3TCAP Entries Fo≥á eacΦá filσ loaded¼á thσ content≤ oµ thσá filσá arσ ì loadeΣ int∩ ß memor∙ buffe≥ anΣ examined« BaseΣ oε thσ filσ ì type¼á segment-uniquσá structura∞ check≤ arσ performed«á Iµ ì thσá check≤á arσá passed¼á thσ segmen⌠ i≤á copieΣá int∩á thσ ì correc⌠á memor∙á buffe≥ baseΣ oε thσ datß containeΣá iεá thσ ì Environmen⌠ Descriptor«á Iµ thσ check≤ arσ no⌠á passed¼á aε ì erro≥á messagσá i≤ issueΣ anΣ thσ nex⌠ filσ iε thσá lis⌠á i≤ ì processed. Sincσá thσá Environmen⌠ Descripto≥ (whicΦ i≤á currentl∙ ì residinτá iεá it≤á memor∙ buffer⌐ i≤á useΣá t∩á providσá thσ ì addres≤á t∩ whicΦ t∩ cop∙ thσ loadeΣ Systeφ Segment¼á i⌠á i≤ ì importan⌠á tha⌠á thσá Environmen⌠ Descripto≥á bσá thσá firs⌠ ì segmen⌠á loadeΣ b∙ LDR«á Aε alternativσ t∩ thi≤ i≤ tha⌠ thσ ì BIO╙ ma∙ initializσ thσ Environmen⌠ Descripto≥ oε ColΣ Boot¼ ì bu⌠á thi≤á woulΣ requirσ ß relativel∙á largσá BIO╙á overheaΣ ì (over 128 bytes for the initial Environment Descriptor). Wheε LD╥ load≤ aε Environmen⌠ Descriptor¼á i⌠ place≤ i⌠ ì a⌠á thσá addres≤á oµ thσ Environmen⌠á Descripto≥á whicΦá wa≤ ì installeΣ iε LD╥ durinτ thσ ZCPR│ Systeφ installation«á An∙ ì othe≥á Systeφ Segmen⌠ i≤ loadeΣ baseΣ oε thσ content≤ oµ thσ ì current Environment Descriptor in memory. Selected Error Messages: "filename.ty≡ i≤ no⌠ ß ValiΣ Typeó mean≤ tha⌠ thσá filσ ì typσ oµ thσ indicateΣ filσ i≤ no⌠ onσ oµ ENV¼ FCP¼ IOP¼ NDR¼ ì RCP, or Z3T. "filename.ty≡á Contain≤á ß Forma⌠ Flawó mean≤ tha⌠á thσ ì structure of the indicated file was not correct. Examples of Use: LDR SYS.ENV,MYIO.IOP,MYCMDS.RCP,MYIFS.FCP -- loaΣ SYS.ENV¼ and¼ baseΣ oε thσ datß iε thi≤ Environment Descriptor, load the I/O Package MYIO.IOP, the Resident Command Package MYCMDS.RCP, and the Flow Command Package MYIFS.FCP LDR TERM1.Z3T -- replace the current Z3TCAP entry with TERM1.Z3T :PATH Path Display and Set Command: PATH 3.0 Syntax: PATH or PATH path-expression Function: PAT╚á allow≤ thσ use≥ t∩ d∩ tw∩ thing≤á -- displa∙á thσ ì curren⌠ patΦ o≥ se⌠ ß ne≈ path«á Thσ displa∙ show≤ thσ patΦ ì iεá threσá formats║á Symbolic¼á Absolutσá (DU)¼á anΣá NameΣ ì Director∙á (DIR)«á Thσ patΦ expressioε ma∙ intermi° an∙á oµ ì thesσ format≤ a≤ desireΣ t∩ expres≤ thσ ne≈ path. Options: None Comments: Thσá PAT╚á CommanΣá i≤ useΣá t∩á dynamicall∙á changσá ß ì memory-baseΣá filσá searcΦ patΦ o≥ thσ ZCPR│ commanΣá searcΦ ì path«á WitΦá PATH¼á thσá use≥ caε definσ ß ne≈ patΦá t∩á bσ ì followeΣ o≥ hσ caε vie≈ wha⌠ thσ curren⌠ patΦ is. PAT╚ determine≤ thσ addres≤ oµ thσ patΦ i⌠ i≤ goinτá t∩ ì work with from the ZCPR3 Environment Descriptor. Thσá PAT╚ commanΣ deal≤ witΦ patΦ expressions«á ┴ patΦ ì expressioεá i≤á ß sequencσ oµ director∙ name≤ whicΦá caεá bσ ì expresseΣá a≤ "ambiguousó D╒ forms¼á absolutσ D╒á forms¼á o≥ ì NameΣ Director∙ forms. Aεá absolutσá D╒á forφ indicate≤á jus⌠á ßá disδá lette≥ ì (curren⌠ use≥ i≤ assumed)¼á jus⌠ ß use≥ numbe≥ (curren⌠ disδ ì i≤á assumed)¼á o≥ botΦ ß disδ lette≥ anΣ ß use≥ number«á Aε ì "ambiguousó D╒ forφ i≤ onσ iε whicΦ thσ disδ lette≥ o≥á use≥ ì numbe≥á o≥á botΦ i≤ replaceΣ witΦ ß "$óá character¼á meaninτ ì "curren⌠ diskó o≥ "curren⌠ user"«á ┴ NameΣ Director∙á form¼ ì oµ course¼ i≤ simpl∙ thσ namσ oµ ß directory. T∩ illustrate¼á let'≤ sa∙ tha⌠ thσ use≥ i≤ loggeΣá int∩ ì B1« Thσ path $0 A$ A0 ROOT represents the sequence B0 to A1 to A0 to ROOT Selected Error Messages: "BaΣ Expressioε a⌠ <text>ó indicate≤ therσ wa≤ aε erro≥ ì in the path expression at the indicated point. Examples of Use: PATH $0 A$ A15 - se⌠á patΦ froφ curren⌠ disk/use≥ ░ t∩ disδ A/curren⌠ ì use≥ t∩ disδ A/use≥ 15 PATH A$ ROOT - set path from disk A/current user to ROOT: :QUIET Display and Set the Quiet Flag Command: QUIET 1.0 Syntax: QUIET o Function: QUIE╘ i≤ useΣ t∩ set¼ reset¼ anΣ displa∙ thσ Quie⌠ Flaτ ì in the ZCPR3 Environment Descriptor. Options: D - Display the Quiet Flag R - Reset (turn OFF) the Quiet Flag S - Set (turn ON) the Quiet Flag Comments: Man∙á ZCPR│ utilitie≤ reaΣ thσ Quie⌠ Flaτ iε thσá ZCPR│ ì Environmen⌠á Descripto≥á anΣ responΣá accordingly«á Iµá thσ ì Quie⌠á Flaτ i≤ Se⌠ (ON)¼á theε certaiε informativσá message≤ ì arσá suppresseΣ iε orde≥ t∩ cu⌠ dowε oε thσ "noiseóá createΣ ì b∙ thσ command«á Iµ thσ Quie⌠ Flaτ i≤ Rese⌠ (OFF)¼ theε al∞ ì messages are displayed. Selected Error Messages: N∩á Erro≥ Message≤ arσ generated«á Aε invaliΣá commanΣ ì results in the Help screen being displayed. Examples of Use: QUIET R - turn OFF (Reset) the Quiet Flag QUIET DISPLAY - Display the Quiet Flag :REG Register Display and Manipulation Command: REG 1.0 Syntax: REG Dr or REG r <-- Display Register r REG Mr <-- Minus (r=r-1) Register r REG Pr <-- Plus (r=r+1) Register r REG Sr value <-- Set (r=value) Register r Function: RE╟ displays¼á add≤ ▒ to¼á subtract≤ ▒ from¼ anΣ set≤ ß ì valuσ t∩ thσ indicateΣ register« ┴ ZCPR│ Registe≥ i≤ ß one-ì byte buffer (values are ranged from 0 to 255 decimal). Thσá valuσá useΣ t∩ indicatσ ß registe≥ i≤ ßá characte≥ ì froφ '0º t∩ '9'«á Thσ characte≥ '#º indicate≤ al∞ register≤ ì ("REG S# 0" stores 0 to all ten registers). Options: Shown Above Comments: Registers are used for two purposes: 1. to support looping in ZEX command files (do something N times) 2. to pass parameter values from one program to another program which is executed later RE╟á ha≤ ß counterpar⌠ commanΣ iε thσá Systeφá Residen⌠ ì Command Package provided in the ZCPR3 distribution. Selected Error Messages: "InvlΣ Reτ ID║ có mean≤ tha⌠ thσ registe≥ indicateΣ wa≤ ì not symbolized by '0' to '9' or '#'. Examples of Use: REG S5 25 -- Register 5 = 25 REG M# -- 1 is subtracted from all registers :SETFILE System File Assignment Command: SETFILE 1.0 Syntax: SETFILE n afn or SETFILE n Function: SETFIL┼ se⌠ thσ namσ oµ ZCPR│ Systeφ Filσ ε (wherσ ε i≤ ì ▒ t∩ 4⌐ t∩ thσ indicateΣ ambiguou≤ filσ name«á Iµ n∩ AF╬ i≤ ì given¼á thσ curren⌠ content≤ oµ thσ indicateΣ Systeφ Filσ i≤ ì displayed. A file number is required. Options: None Comments: ZCPR│á Systeφ File≤ arσ referenceΣ b∙ somσ oµ thσ ZCPR│ ì utilities¼á MEN╒á anΣ ALIA╙ iε particular«á SETFIL┼ i≤á thσ ì mean≤á b∙ whicΦ thσ content≤ oµ thesσ filσ namσá buffer≤á i≤ ì defined. Selected Error Messages: "InvaliΣ Filσ Namσ Numbe≥ (no⌠ 1-4)ó mean≤ tha⌠ ß valiΣ ì filσá numbe≥ wa≤ no⌠ giveε afte≥ thσ SETFIL┼ verΓ (SETFIL┼ ε ì afn). Examples of Use: SETFILE 1 myfile.txt - System File 1 is set to MYFILE.TXT SETFILE 4 - the name of System File 4 is displayed :SHCTRL Shell Stack Display and Manipulation Command: SHCTRL 1.0 Syntax: SHCTRL o Function: SHCTR╠á i≤á useΣ t∩ providσ somσ contro∞ oµá thσá ZCPR│ ì Shel∞á Stacδá froφ thσ commanΣ line«á Thσ content≤á oµá thσ ì Shel∞ Stacδ caε bσ displayeΣ anΣ poppeΣ onσ leve∞ o≥ cleareΣ ì completely. Options: C - Clear the Shell Stack (no Shell is in effect) D - Display Shell Stack P - Pop the Shell Stack (the current Shell is stopped and the next Shell on the stack is invoked) Comments: Onl∙á onσá optioε ma∙ bσ useΣ iε conjunctioεá witΦá thσ ì SHCTR╠á command«á An∙ character≤ followinτ thi≤ optioεá arσ ì ignored. SHCTR╠á i≤á intendeΣ t∩ bσ useΣ iε situation≤á wherσá ß ì director∙ changσ i≤ desireΣ anΣ ß Shell¼ sucΦ a≤ MENU¼ i≤ iε ì execution«á Thσá Shel∞ Stacδ caε bσ popped¼á thσá director∙ ì changσáá performed¼áá anΣá thσá origina∞á Shel∞áá explicitl∙ ì reinvoked. Selected Error Messages: None - Help is printed if invalid option Examples of Use: SHCTRL P - pop the Shell Stack one level SHCTRL D - display the contents of the Shell Stack :SHOW System Configuration Display and Error Handler Command: SHOW 1.0 Syntax: SHOW o Function: SHO╫ i≤ thσ ZCPR│ Environmen⌠ Displa∙ utility« Detail≤ ì oµ thσ ZCPR│ Environmen⌠ Descriptor¼á wha⌠ systeφ facilitie≤ ì arσá available¼á anΣ wha⌠ thσ statu≤ oµ thesσ facilitie≤á i≤ ì arσá somσá oµ thσ item≤ includeΣ iεá thσá numerou≤á display≤ ì which are generated by SHOW. SHO╫ caε bσ invokeΣ a≤ aε Erro≥ Handler¼á iε whicΦ casσ ì it≤á Erro≥ Handle≥ displa∙ caε givσ thσ commanΣ linσá statu≤ ì anΣá it≤ othe≥ displays¼á sucΦ a≤ memor∙ examine¼á ma∙ provσ ì useful to analyze the state of the ZCPR3 System. Options: E - Install SHOW as an Error Handler (no SHOW displays are invoked) Comments: SHOW provides the following displays to the user: 1. Package Data 3. ZCPR3 System - Flow Command Package - Environment Descriptor - Input/Output Package - Message Buffers - Resident Command Package - CRT and Printer Data - System File Definitions 2. Environment Data - Error Handler - Memory Display Utility - Named Directory Display - Path Expression - Shell Stack SHO╫ i≤ screen-orienteΣ anΣ wil∞ no⌠ functioε correctl∙ ì withou⌠ prope≥ Z3TCA╨ support«á Thσ Environmen⌠á Descripto≥ ì MUST be installed with a valid Z3TCAP entry. Selected Error Messages: Self-Explanatory Examples of Use: Tr∙á i⌠á - you'l∞ likσ itíá SHO╫á i≤á totall∙á screen-ì orienteΣá anΣá wil∞ no⌠ begiε t∩ functioε correctl∙á withou⌠ ì prope≥á Z3TCA╨á support«á Iµ thσ use≥ enter≤á SHO╫á withou⌠ ì proper support, the X command exits SHOW. :Z3INS ZCPR3 System Installation Program Command: Z3INS 1.0 Syntax: Z3INS ufn1 ufn2 UFN1 must be an Environment Descriptor UFN2 must be a Z3INS Installation File Function: Z3IN╙á install≤ thσ file≤ nameΣ iε ß Z3IN╙ Installatioε ì Filσá witΦ datß froφ thσ Environmen⌠á Descripto≥á specified« ì All files must be ZCPR3 Utilities. Thσáá defaul⌠áá filσá type≤á arσá EN╓á fo≥á UFN▒áá (thσ ì Environment Descriptor) and INS (the Installation File). Options: None Comments: Z3IN╙ i≤ thσ installatioε prograφ fo≥ thσ ZCPR│ System« ì Al∞ utilitie≤ provideΣ iε thσ ZCPR│ distributioε excep⌠á fo≥ ì ZEX may be installed for a target system by using Z3INS. ┴á ZCPR│á Installatioεá Filσá i≤á simpl∙á ßá tex⌠á filσ ì containinτ tw∩ type≤ oµ lines║ ß commen⌠ line¼ whicΦ begin≤ ì witΦá ß semicoloε (;)¼á anΣ ß linσ containinτ aε unambiguou≤ ì file name, which is a file to be installed. Example: ; This is an installation file for my new utilities util1.com util2.com ; UTIL3 is really neat util3.com -- Sample Z3INS Installation File -- Casσ i≤ no⌠ significant«á Leadinτ space≤ oε eacΦá linσ ì are ignored. Any file name MUST be unambiguous. Thσá Environmen⌠á Descripto≥ referenceΣ iε thσá commanΣ ì linσ i≤ ß standarΣ ZCPR│ Systeε Environmen⌠ descripto≥ whicΦ ì is created by assembling a file like SYSENV.ASM. Selected Error Messages: Al∞áá erro≥á message≤á arσá ver∙á completσá anΣáá self-ì explanatory. Examples of Use: Z3INS SYS.ENV NEWFILES.INS -- Install the files listed in NEWFILES.INS with the data contained in SYS.ENV Z3INS NEWENV DIST -- Install the files listed in DIST.INS with the data contained in NEWENV.ENV :Z3LOC ZCPR3 System Segment Locator Command: Z3LOC 1.0 Syntax: Z3LOC o Function: Z3LO├á i≤ useΣ t∩ locatσ anΣ displa∙ thσá addresse≤á oµ ì thσ runninτ ZCPR│ CommanΣ Processo≥ Replacement¼á BDOS¼á anΣ ì BIOS«á I⌠ ma∙ als∩ bσ ruε unde≥ conventiona∞ CP/═ t∩ locatσ ì anΣá displa∙á thσ addresse≤ oµ thσ runninτ CP/═ 2.▓á Consolσ ì Command Processor, BDOS, and BIOS. Z3LO├ i≤ als∩ ablσ t∩ displa∙ thσ addresse≤ oµ ß numbe≥ ì oµá ZCPR│ Systeφ Segment≤ anΣ datß area≤ iµ thσ ┌ optioεá i≤ ì given«á Thσá ┌ optioε shoulΣ no⌠ bσ giveε iµ runninτá Z3LO├ ì under CP/M 2.2. Options: Z - Display addresses and data on ZCPR3 System Segments and data areas Comments: Iµá thσá ┌ optioε i≤ giveε (┌ shoulΣ onl∙ bσá giveεá iµ ì runninτá Z3LO├á unde≥á ZCPR3)¼áá thσá followinτáá additiona∞ ì address information is provided: ∩ Externa∞ PatΦ ∩ Residen⌠ CommanΣ Package o Input/Output Package o Flow Command Package o Named Directory Buffer o Command Line Buffer o Shell Stack o Environment Descriptor o External FCB o ZCPR3 Message Buffer o External Stack o Wheel Byte Selected Error Messages: Z3LO├á generate≤ n∩ erro≥ messages«á Aε invaliΣ optioε ì invokes a help screen. Examples of Use: Z3LOC -- run Z3LOC for CPR/CCP, BDOS, and BIOS display (may be used this way under CP/M 2.2) Z3LOC Z -- display ZCPR3 data as well (may be used this way under ZCPR3 only)