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https://github.com/SEPPDROID/Digital-Research-Source-Code.git
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227 lines
7.9 KiB
TeX
227 lines
7.9 KiB
TeX
.mt 6
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.mb 6
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.pl 66
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.ll 65
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.po 10
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.nf
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.hm 2
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.fm 2
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.he ********** MP/M-86 Seminar Notes **********
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.fô Alì Informatioî Hereiî ió Proprietarù Tï Digitaì Research¬ Inc.
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.nf
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.pa
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.sp 2
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.ce 100
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.sh
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MP/M-86 Memory Management
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.sh
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=========================
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.sp 2
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Memory Parameter Block (MPB) Format:
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.sp
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+------+------+------+------+------+------+------+------+\
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| START | MIN | MAX | *PDADDR |\
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+------+------+------+------+------+------+------+------+\
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| *FLAGS | \
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+------+------+ \
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.sp
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FLAGS:
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.sp
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00001H LOAD \
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00002H SHARE \
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00004H CODE \
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00008H\\ \
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... > RESERVED\
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08000H/ \
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.sp 2
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Memory Free Parameter Block (MFPB) Format:
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.sp
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+------+------+------+------+\
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| START | *PDADDR |\
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+------+------+------+------+\
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.sp 2
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Memory Segment Descriptor (MSD) Format:
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.sp
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+------+------+------+------+------+------+------+------+\
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| *LINK | *START | *LENGTH | *FLAGS |\
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+------+------+------+------+------+------+------+------+\
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| *MAU | \
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+------+------+ \
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.ce 0
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.pa
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.ce 100
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.sp 2
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.sh
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MP/M-86 Extended Fixed Partition Model
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.sh
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--------------------------------------
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.sp 2
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Memory Free List (MFL)
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.sp
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+-----+-----+ \
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| o | \
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+-----|-----+ \
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V Memory Partition Descriptor (MPD) \
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+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+\
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| LINK | START | LENGTH | XXXXX | XXXXX |\
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+-----|-----+-----+-----+-----+-----+-----+-----+-----+-----+\
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V \
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... \
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+-----+-----+-----+--- \
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| 0 | MPD \
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+-----+-----+-----+--- \
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.sp 2
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Memory Allocation List (MAL)
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.sp
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+-----+-----+ \
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| o | \
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+-----|-----+ \
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V Memory Allocation Unit Descriptor (MAUD) \
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+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+\
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| LINK | START | LENGTH | PLIST | XXXXX |\
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+-----|-----+-----+-----+-----+-----+-----|-----+-----+-----+\
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| V \
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| +-----+-----+-----+--- \
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| | o | MPD ... \
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| +-----|-----+-----+--- \
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V V \
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.ce 0
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.pa
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.ce 100
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.sp 2
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.sh
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MP/M-86 Memory Allocation Unit (MAU)
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.sh
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------------------------------------
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.sp 2
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HIGH +---------------------------------+\
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| |\
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| |\
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| Allocatable Memory |\
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| |\
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| |\
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| |\
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+---------------------------------+\
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| Sub-Allocation Table (SAT) |\
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LOW +---------------------------------+\
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.sp 2
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Sub-Allocation Table (SAT) Format:
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.sp
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+------+------+------+------+------+\
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|# ent.| RESERVED |\
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+------+------+------+------+------+\
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| START | LENGTH | NALL |\
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+------+------+------+------+------+\
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| START | LENGTH | NALL |\
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+------+------+------+------+------+\
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| | | |\
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/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\\
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/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\\
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| | | |\
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+------+------+------+------+------+\
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| 0 | 0 | 0 |\
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+------+------+------+------+------+\
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.sp 2
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.sh
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MP/M-86 Memory Usage at Load Time
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.sh
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---------------------------------
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.sp 2
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HIGH +---------------------------------+Ü
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| |\
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| PROGRAM AREA |\
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| |\
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+20H +---------------------------------+Ü
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| STACK |\
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+1AH +---------------------------------+Ü
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| UDA |\
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+0AH +---------------------------------+Ü
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| SAT |\
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+00H +---------------------------------+Ü
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.ce 0
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.pa
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.ce 100
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.sp 2
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Resident System Process (RSP) Memory Models
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===========================================
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.sp
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8080 Model Small Model\
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+----------+ +----------+\
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| (Header) | | Code |\
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| | | |\
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| Mixed | +----------+\
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| Code & | | (Header) |\
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| Data | | Data |\
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| | | |\
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+----------+ +----------+\
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.sp 2
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RSP Header Format:
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.sp
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+------+------+------+------+------+------+------+------+\
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00 | SYSDAT | SDATVAR | NCP | RESERVED |\
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+------+------+------+------+------+------+------+------+\
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08 | RESERVED |\
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+------+------+------+------+------+------+------+------+\
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10 | PROCESS DESCRIPTOR |\
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| |\
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+-------------------------------------------------------+\
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40 | |\
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| UDA |\
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| |\
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| |\
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+-------------------------------------------------------+\
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140| |\
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| PROGRAM DATA AREA |\
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| |\
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+-------------------------------------------------------+\
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.ce 0
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.pa
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.sp 2
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.ce 100
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.sh
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Multiple Copies of RSP's
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.sh
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------------------------
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.sp 2
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Example of 3 Copies of 8080 Model, Small Model
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and Shared Code Model
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.sp 2
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8080 Model:
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.sp
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+----------+ +----------+ +----------+\
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| ncp=0 | | ncp=1 | | ncp=2 |\
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| | | | | |\
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| Code | | Code | | Code |\
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| and | | and | | and |\
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| Data | | Data | | Data |\
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| | | | | |\
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+----------+ +----------+ +----------+\
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.sp 2
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Small Model:
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.sp
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+----------+ +----------+ +----------+\
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| Code | | Code | | Code |\
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| | | | | |\
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+----------+ +----------+ +----------+\
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| ncp=0 | | ncp=1 | | ncp=2 |\
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| | | | | |\
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| Data | | Data | | Data |\
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| | | | | |\
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+----------+ +----------+ +----------+\
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.sp 2
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Shared Codel Model:
|
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.sp
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+----------+ \
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||
| Code | \
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| | \
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+----------+ \
|
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.sp
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+----------+ +----------+ +----------+\
|
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| ncp=0 | | ncp=1 | | ncp=2 |\
|
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| | | | | |\
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| Data | | Data | | Data |\
|
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| | | | | |\
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+----------+ +----------+ +----------+\
|
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.ce 0
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|