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- LDR.COM
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- Size (recs) CRC Version Author/Latest Issue Disk
- 4k (29) FC11 1.6 Joe Wright 6/86 Z3COM5
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- 1- Syntax 2- Notes 3- Error Messages 4- Examples of Use
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- LD╥ i≤ ß general-purposσ systeφ segmen⌠ loade≥ fo≥ ZCPR3«á I⌠ load≤ al∞ oµ ì
- thσá ZCPR│á systeφá segment≤ int∩ thei≥ appropriatσá buffers¼á checkinτá thei≥ ì
- forma⌠á anΣ conten⌠ beforσ approvinτ anΣ completinτ eacΦá load«á EacΦá systeφ ì
- segmen⌠ i≤ specifieΣ unambiguously«á LD╥ wil∞ loaΣ ENV¼á FCP¼á IOP¼ NDR¼ RCP¼ ì
- anΣ Z3╘ segmen⌠ files«á Sincσ thσ Environmen⌠ Descripto≥ provide≤ thσ addres≤ ì
- a⌠á whicΦ t∩ loaΣ ß buffereΣ systeφ segment¼á i⌠ i≤ importan⌠ tha⌠ thσ EN╓á bσ ì
- thσ firs⌠ segmen⌠ loadeΣ b∙ LDR« V≤ 1.░ (2/84⌐ b∙ R« Conn.
- :1
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- Syntax: LDR [library,]<list of packages/data files>
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- where entries in the list may be any of the following:
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- FCP - Flow Cmnd Package ENV - Z3 Environ
- IOP - Input/Output Package NDR - Z3 Named Dir
- RCP - Resident Cmnd Package Z3T - Z3TCAP Entry
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- The package list may have DU: or DIR: references.
- If they do not, the path is searched for the package.
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- The ENV file must be first if LDR is not installed.
- :2
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- LDR Notes:
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- a. Thσáfollowinτ Systeφ Segment≤ arσ loadeΣáint∩ámemor∙ buffers by LDR:
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- *.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
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- b. Fo≥á eacΦáfilσ loaded¼áthσ content≤ oµ thσáfilσáarσ loadeΣ int∩ ß memor∙
- buffe≥ anΣ examined« BaseΣ oε thσ filσ type¼ásegment-uniquσástructura∞
- check≤ arσ performed«á Iµ thσácheck≤á arσápassed¼áthσ segmen⌠ i≤ácopieΣ
- int∩á thσ correc⌠á memor∙ábuffe≥ baseΣ oε thσ datß containeΣáiεáthσ
- Environmen⌠ Descriptor«á Iµ thσ check≤ arσ no⌠ápassed¼áaε erro≥ámessagσ
- á i≤ issueΣ anΣ thσ nex⌠ filσ iε thσális⌠ái≤ processed.
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- LDR Notes (continued):
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- c. Sincσáthσá Environmen⌠ Descripto≥ (whicΦ i≤á currentl∙ residinτáiεáit≤
- á memor∙ buffer⌐ i≤á useΣá t∩áprovidσá thσ addres≤á t∩ whicΦ t∩ cop∙ thσ
- loadeΣ Systeφ Segment¼ái⌠á i≤ importan⌠átha⌠á thσáEnvironmen⌠ Descripto≥
- bσáthσáfirs⌠ segmen⌠áloadeΣ b∙ LDR«á Aε alternativσ t∩ thi≤ i≤ tha⌠ thσ
- BIO╙ ma∙ initializσ thσ Environmen⌠ Descripto≥ oε ColΣ Boot¼ bu⌠áthi≤
- woulΣ requirσ ß relativel∙á largσáBIO╙áoverheaΣ (over 128 bytes for the
- initial Environment Descriptor).
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- d. Wheε LD╥ load≤ aε Environmen⌠ Descriptor¼ái⌠ place≤ i⌠ a⌠áthσáaddres≤
- oµ thσ Environmen⌠áDescripto≥á whicΦá wa≤ installeΣ iε LD╥ durinτ thσ
- ZCPR│ Systeφ installation«á An∙ othe≥áSysteφ Segmen⌠ i≤ loadeΣ baseΣ
- oε thσ content≤ oµ thσ current Environment Descriptor in memory.
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- e. LDR vs 1.6 adds the ability to read files from a library to LDR.
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- :3
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- LDR Error Messages:
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- "filename.ty≡ i≤ no⌠ ß ValiΣ Typeó
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- - thσáfilσ typσ oµ thσ indicateΣ filσ i≤ no⌠ onσ oµ ENV¼ FCP¼ IOP¼
- NDR¼ RCP, or Z3T.
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- "filename.ty≡á Contain≤á ß Forma⌠ Flawó
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- - thσ structure of the indicated file was not correct.
- :4
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- Examples of Use:
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- a. LDR SYS.ENV,MYIO.IOP,MYCMDS.RCP,MYIFS.FCP
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- - 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
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- b. LDR TERM1.Z3T
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- - replace the current Z3TCAP entry with TERM1.Z3T
- a∞ ì
- t