CP/M/CPM_CDROM.iso/cpm/zcpr2/io.hlp

Text File | 1994-07-13 | 13.1 KB | 319 lines

Redirectable I/O Under ZCPR2 and SYSIO
Loading Redirectable I/O Drivers -- IOLOADER
Displaying and Selecting Redirectable I/O Drivers -- DEVICE
Controlling the Disk Output Facility -- RECORD
Redirectable I/O and the ZCPR2 System
:Redirectable I/O Under ZCPR2

     Basically¼á thσá concep⌠á oµ redirectablσ I/╧á involve≤á thσ ì
assignmen⌠á oµ physica∞ device≤ t∩ logica∞á devices«á  ZCPR▓á anΣ ì
CP/═ suppor⌠ fou≥ logica∞ devices:

          CON: - Console - An I/O Device for User/System Commo
          LST: - Printer - An Output-Only Device for Printouts
          RDR: - Reader  - An Input-Only Device
          PUN: - Punch   - An Output-Only Device

     Unde≥á CP/M¼á therσ arσ onl∙ fou≥ physica∞ device≤ whicΦ ma∙ ì
bσá assigneΣ t∩ eacΦ oµ thσ fou≥ logica∞ devices«á  Unde≥á ZCPR2¼ ì
therσá ma∙á bσ a≤ man∙ physica∞ device≤ a≤ desireΣ whicΦá ma∙á bσ ì
assigned to each of the four logical devices.

     ┴áá "physica∞á deviceóá iεá thσá traditiona∞á sensσáá i≤áá ß ì
conventiona∞ I/╧ device¼á likσ ß CR╘ o≥ ß Printer«á  Iε thσ sensσ ì
oµ ZCPR2¼á i⌠ i≤ ß devicσ driver¼á o≥ bod∙ oµ software¼á whicΦ i≤ ì
communicateΣ witΦ viß thσ BIOS«á  Thi≤ bod∙ oµ software¼ iε turn¼ ì
may communicate with any device OR SET OF DEVICES that it wishes.

     SYSI╧á i≤ ß samplσ se⌠ oµ Redirectablσ I/╧ Driver≤á designeΣ ì
t∩ bσ useΣ witΦ ZCPR▓ oε m∙ system«á  Unde≥ SYSIO¼á thσ followinτ ì
"physical devices" are implemented:

CON: Devices - TTY
               CRT
               CRT Input and CRT/Remote Computer Output
               CRT and Modem Input and CRT and Modem Output
                    in Parallel
               CRT Input and CRT/Modem Output

LST: Devices - TTY
               CRT
               Modem
               Remote Computer

RDR: and PUN: Devices - Modem
                        Clock


     A≤á yo⌡á caεá see¼á thσ "physica∞ devicesó unde≥á ZCPR▓á caε ì
actuall∙á bσ combination≤ oµ actua∞ devices«á  Thσ CR╘ Inpu⌠á anΣ ì
CRT/Remotσ Compute≥ Outpu⌠ device¼ fo≥ instance¼ i≤ useΣ t∩ allo≈ ì
a remote computer record screen displays which go to the CRT.

     Unde≥ ZCPR2¼á yo⌡ caε creatσ a≤ man∙ sets¼á o≥ packages¼á oµ ì
Redirectablσ I/╧ Driver≤ a≤ yo⌡ wish«  EacΦ packagσ caε bσ se⌠ u≡ ì
t∩ givσ thσ use≥ differen⌠ type≤ oµ capabilities«á  Fo≥ instance¼ ì
onσá packagσá caεá bσ likσ thσ onσ ╔á havσá defineΣá abovσá whilσ ì
anothe≥á packagσ caε providσ Disδ Recordinτ capability¼á sucΦá a≤ ì
CRT Input and CRT/Disk File Output.


     Thσá ZCPR▓á Systeφá oµá Program≤á contain≤á threσá utilitie≤ ì
designeΣ t∩ suppor⌠ thσ Redirectablσ I/╧ System«  Thesσ utilitie≤ ì
and their functions are:

          IOLOADER -- Load a Redirectable I/O Package
          DEVICE   -- Display and Select Physical I/O Devices
          RECORD   -- Turn on and off the Recording Facility

     Thi≤á HEL╨á Filσ discusse≤ thesσ utilitie≤ anΣ ho≈ the∙á arσ ì
intended to be used.

     Chapte≥á ╖á oµá thσ "Concept≤ Manua∞á fo≥á ZCPR2óá discusse≤ ì
redirectablσá I/╧á a≤á i⌠ caε bσ implementeΣá unde≥á ZCPR2«á  Thσ ì
reader is invited to refer to this for much more detail.


:Loading Redirectable I/O Drivers -- IOLOADER

     IOLOADE╥á i≤ useΣ t∩ loaΣ aε indicateΣ o≥ implieΣ I/╧ drive≥ ì
packagσá int∩á you≥ redirectablσ I/╧ buffe≥á area«á  IOLOADE╥á i≤ ì
invoked by one of the following forms:

          IOLOADER //              <-- Print Help Message
          IOLOADER                 <-- Load SYSIO.IO
          IOLOADER filename        <-- Load filename.IO
          IOLOADER filename.typ    <-- Load filename.typ

     Notσá tha⌠á thσá DIR║á prefi° i≤á NO╘á supporteΣá witΦá thi≤ ì
program«á  Iε al∞ case≤ oµ loadinτ files¼ IOLOADE╥ searche≤ alonτ ì
thσ ZCPR▓ patΦ fo≥ thσ indicateΣ o≥ implieΣ file«  Oncσ found¼ i⌠ ì
is loaded into your redirectable I/O buffer.

     GENIN╙á i≤ useΣ t∩ instal∞ IOLOADER¼á anΣ IOLOADE╥ neeΣ onl∙ ì
kno≈ thσ addres≤ oµ thσ externa∞ path¼ thσ symbo∞ fo≥ thσ curren⌠ ì
use≥ anΣ disδ indicato≥ ("$ó b∙ default)¼á anΣ thσ addres≤ oµ thσ ì
redirectable I/O buffer.

:Displaying and Selecting Redirectable I/O Drivers -- DEVICE

     DEVICE¼á o≥á DEVICE▓á (s∩ calleΣ becausσ i⌠á i≤á thσá seconΣ ì
generatioεá oµ m∙ DEVIC┼ program)¼á i≤ useΣ t∩ allo≈ thσ use≥á t∩ ì
interactivel∙ displa∙ thσ name≤ oµ thσ availablσ physica∞ device≤ ì
(actually¼á devicσá drivers⌐ whicΦ ma∙ bσ assigneΣ t∩ thσ logica∞ ì
device≤á anΣ t∩ allo≈ thσ use≥ t∩ assigε ß physica∞ devicσá t∩á ß ì
logical device by name.

     DEVICE is invoked by one of the following forms:

          DEVICE //           <-- Print Help Info
          DEVICE              <-- Enter Interactive Command Mode
          DEVICE cmd,cmd,...  <-- Immediately Execute Commands

     Iεá al∞ cases¼á wheneve≥ yo⌡ arσ givinτ command≤ t∩á DEVICE¼ ì
whethe≥á i⌠á i≤á froφ thσ commanΣ leve∞ oµ ZCPR▓ o≥á froφá withiε ìèDEVIC┼ itself¼á yo⌡ caε specif∙ ß serie≤ oµ command≤ separateΣ b∙ ì
commas.


     The following commands can be given to DEVICE:

          DISPLAY ALL or CON or LST or RDR or PUN
               <-- Display Physical Device Driver Names which
                    can be assigned to CON:, LST:, RDR:, or PUN:
                    Logical Devices; also display the current
                    assignment

          CON or LST or RDR or PUN = Device
               <-- Assign a Physical Device Driver to a Logical
                    Device

     Iε al∞ cases¼ onl∙ thσ firs⌠ lette≥ oµ DISPLA┘ anΣ thσ firs⌠ ì
lette≥ oµ ß Logica∞ Devicσ o≥ thσ worΣ "ALLó i≤á necessary«á  Al∞ ì
othe≥á letter≤á arσ ignored«á  Thσ completσ namσ oµá thσá device¼ ì
however, is necessary.

     Also¼áá thσáá spacσá anΣá thσá characte≥á "=óá ma∙á bσá useΣ ì
interchangably and case is not significant.

     The following are examples of DEVICE commands:

          D C,D L or D=C,D=L
               Display CON: and LST: Devices

          con:=crt,list=tty,reader=modeφ o≥ c=crt,∞ tty,r=modem
               Select the Physical Device Driver called CRT for
               the CON: Logical Device, select TTY for the LST:
               Logical Device, and select MODEM for the RDR:

     Thσá followinτ termina∞ sessioε furthe≥ illustrate≤ thσá usσ ì
oµ DEVIC┼ witΦ m∙ particula≥ se⌠ oµ Redirectablσ I/╧ Drivers«  M∙ ì
comments are indicated by <<--.


B7>device display console
DEVICE2, Version 1.3

CON: Devices --
        CRTMOD2  - Televideo 950 CRT Input and CRT/Modem Output
        CRTREM   - Televideo 950 CRT Input and CRT/Remote Output
        CRTMOD   - Televideo 950 CRT and Modem in Parallel
        CRT      - Televideo 950 CRT
        TTY      - Model 43 Printing Terminal
  Current Assignment: CRTMOD

B7>device
DEVICE2, Version 1.3
DEVICE2 Interactive Command System
Type ? and Strike RETURN for Help


DEVICE2 Command? d l,lst:=modem         <<-- Multiple Commands in
                                        <<-- Free Format
LST: Devices --
        MODEM    - DC Hayes Smartmodem
        REMOTE   - Remote Computer
        CRT      - Televideo 950 CRT
        TTY      - Model 43 Printing Terminal
  Current Assignment: TTY
DEVICE2 Command? display list

LST: Devices --
        MODEM    - DC Hayes Smartmodem
        REMOTE   - Remote Computer
        CRT      - Televideo 950 CRT
        TTY      - Model 43 Printing Terminal
  Current Assignment: MODEM


DEVICE2 Command? l tty             <<-- Assign Device
DEVICE2 Command? l ttyx            <<-- How DEVICE Handles Errors
Invalid Name Assignment at -- TTYX
DEVICE2 Command? d l

LST: Devices --
        MODEM    - DC Hayes Smartmodem
        REMOTE   - Remote Computer
        CRT      - Televideo 950 CRT
        TTY      - Model 43 Printing Terminal
  Current Assignment: TTY


DEVICE2 Command? ?                 <<-- Built-In Help
DEVICE2 Commands are of the form:
Command,Command, ...    <-- Issue Commands
where "command" may take the following forms:
                DISPLAY=ALL     <-- Display Names of All Devices
                DISPLAY=CON     <-- Display Names of Consoles
                DISPLAY=LST     <-- Display Names of Printers
                DISPLAY=RDR     <-- Display Names of Readers
                DISPLAY=PUN     <-- Display Names of Punches

                CON:=name       <-- Select Console
                LST:=name       <-- Select Printer
                RDR:=name       <-- Select Reader
                PUN:=name       <-- Select Punch

A command line beginning with a semicolon (;) is a comment.
The X Command Exits DEVICE2.

DEVICE2 Command? x            <<-- Exit
:Controlling the Disk Output Facility -- RECORD

     RECOR─á i≤á useΣ t∩ contro∞ thσ Disδ Outpu⌠ Facilit∙ oµá thσ ì
Redirectablσ I/╧ Drivers«á  Copie≤ oµ Consolσ anΣ Printe≥ output≤ ì
caε bσ createΣ iε disδ file≤ b∙ thσ usσ oµ thi≤ facility¼á anΣ i⌠ ì
ma∙ bσ extendeΣ int∩ ß numbe≥ oµ othe≥ application≤ a≤ well.

     RECORD is invoked by one of the following forms:

          RECORD or RECORD //           <-- Get Help
          RECORD ON or OFF              <-- Console Recording
          RECORD ON or OFF PRINTER      <-- Printer Recording

     Fo≥ RECOR─ t∩ perforφ it≤ function¼á i⌠ mus⌠ bσá implementeΣ ì
iε thσ Redirectablσ I/╧ Drivers«  Thi≤ i≤ lef⌠ a≤ aε exercisσ fo≥ ì
thσá reader«á  Thσá Redirectablσ I/╧ Driver≤ supplieΣ witΦá ZCPR▓ ì
havσá simplσ RETurε instruction≤ a≤ thσ subroutine≤á executeΣá b∙ ì
the RECORD functions.


     Fou≥á routine≤á arσ accesseΣ iε thσ Redirectablσ I/╧á Drive≥ ì
package to control the RECORD function.  They are:

          COPEN -- Open File for Recording Console Output
          LOPEN -- Open File for Recording List Output
          CCLOSE -- Close File for Recording Console Output
          LCLOSE -- Close File for Recording List Output

     Iεá thσ case≤ oµ COPE╬ anΣ LOPEN¼á the∙ arσ passeΣ ß pointe≥ ì
t∩á thσá firs⌠ twelvσ byte≤ oµ aε FC┬ iε HL«á  The∙ arσá t∩á cop∙ ì
thesσá twelvσá byte≤á int∩ thei≥ interna∞ FCB≤ anΣá usσá theφá t∩ ì
definσ thσ filσ names«á  Typically¼ thσ outpu⌠ file≤ generateΣ b∙ ì
thσá RECOR─ functioε arσ placeΣ iε thσ curren⌠á directory¼á alth∩ ì
thσá Redirectablσá I/╧ Driver≤ ma∙ bσ configureΣá t∩á placσá theφ ì
anywherσ desired.

     Wheεá RECOR─á i≤á invokeΣá t∩á turε O╬á onσá oµá thσá recorΣ ì
functions¼ i⌠ prompt≤ thσ use≥ fo≥ thσ namσ oµ thσ filσ t∩ recorΣ ì
into«  RECOR─ theε call≤ thσ appropriatσ OPE╬ routine.

     Thσá RECOR─á prograφ know≤ iµ disδ filσ outpu⌠á driver≤á arσ ì
availablσ thr⌡ thσ Redirectablσ I/╧ Packagσ Statu≤á Routine«á  Iµ ì
Registe≥ ┴ i≤ returneΣ witΦ thσ high-orde≥ bi⌠ set¼á sucΦ driver≤ ì
arσ available.

     RECOR─á i≤ tieΣ int∩ thσ Redirectablσ I/╧ Package≤ anΣ work≤ ì
witΦá them«á  Thσ reade≥ i≤ inviteΣ t∩ refe≥ t∩ thσá Installatioε ì
Manua∞á anΣá thσá Concept≤á Manua∞á fo≥á furthe≥á detai∞á oεá thσ ì
organizatioε anΣ functioε oµ sucΦ packages.

     RECOR─ i≤ als∩ indirectl∙ tieΣ int∩ DEVICE«  Invokinτ RECOR─ ì
itselµáá doe≤á no⌠á necessaril∙á star⌠á thσáá recordinτáá proces≤ ì
immediately«á  Tw∩á function≤ mus⌠ takσ placσ t∩ begiεá recordinτ ì
outpu⌠ ont∩ disδ files:

          1) RECORD has to turn the appropriate Driver ON
          2) DEVICE has to select the appropriate Driver


     Thi≤ lead≤ t∩ interestinτ possiblities«á  B∙ turninτá RECOR─ ì
OF╞á durinτá ß recordinτ session¼á thσ outpu⌠ filσ i≤ closeΣá anΣ ì
availablσá fo≥ othe≥ uses«á  Iµ RECOR─ i≤ late≥á turneΣá ON¼á thσ ì
outpu⌠á filσá ma∙á bσ deleteΣ (iµ thσ samσ filσá i≤á selecteΣá t∩ ì
recorΣ into)«á  However¼ iµ ß ne≈ devicσ i≤ selecteΣ whilσ RECOR─ ì
i≤á O╬á (say¼á DEVIC┼á CON:=CR╘ i≤á issued)¼á theεá recordinτá i≤ ì
SUSPENDE─ (NO╘ turneΣ off⌐ unti∞ thσ recordinτ devicσ i≤ selecteΣ ì
again«á  Hence¼á iµá i⌠á look≤ likσ thσ recordinτ sessioε i≤á no⌠ ì
goinτ well¼á recordinτ caε bσ suspended¼á thσ probleφ fixed¼á anΣ ì
theε recordinτ caε bσ resumed.

     Thi≤á combineΣ systeφ oµ DEVIC┼ anΣ RECOR─ provide≤á ßá ver∙ ì
flexiblσá outpu⌠á recordinτá system«á  Iεá addition¼á thσá outpu⌠ ì
recordinτá neeΣ no⌠ necessaril∙ g∩ t∩ ß disδ file«á  I⌠ coulΣá bσ ì
se⌠ u≡ t∩ senΣ CON║ outpu⌠ t∩ thσ CR╘ and¼ say¼ ß Remotσ Compute≥ ì
fo≥á processing«á  Thσ systeφ caε bσ configureΣ iε ß largσ numbe≥ ì
oµ ways.

:Redirectable I/O and the ZCPR2 System

     Thσá ZCPR▓ Systeφ caε functioε witΦ o≥ withou⌠á Redirectablσ ì
I/╧á a≤ implementeΣ b∙ thσ Redirectablσ I/╧ Drive≥á Package≤á anΣ ì
thσ IOLOADER¼á DEVICE¼ anΣ RECOR─ programs«  Obviously¼ thσ ZCPR▓ ì
System is made much more flexible by employing these facilities.

     DEVIC┼á anΣ RECOR─ arσ tieΣ directl∙ t∩ thσ Redirectable I/╧ ì
Package≤ themselves«  The∙ don'⌠ usσ an∙ oµ thσ othe≥ feature≤ oµ ì
thσá ZCPR▓ Systeφ t∩ speaδ of¼á anΣ the∙ arσ installeΣ b∙á GENIN╙ ì
(the∙ neeΣ t∩ kno≈ wherσ thσ Redirectablσ I/╧ Buffe≥ i≤ located)«  ì
IOLOADE╥ als∩ need≤ t∩ bσ tolΣ wherσ thσ Redirectablσ I/╧á Buffe≥ ì
i≤á locateΣá b∙ GENINS¼á anΣ i⌠ use≤ thσ ZCPR▓ patΦ t∩á finΣá it≤ ì
files.

     Thσá program≤á controllinτ thσ Redirectablσ I/╧ Driver≤á arσ ì
tied together in this manner:

          IOLOADER loads the drivers
          DEVICE controls the drivers
          RECORD enables and disables the disk recording
               facilities of the drivers