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 <<O>>  Difference Topic P13 (r1.15 - 19 Sep 2006 - Home.carotman)
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* JDM P13 J50 UK 4 Plug Version:
HondaP13J501UKJDM.jpg

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Hardware Mods: Remove AKnock Sensor OBD1 P13 Auto Manual

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%META:FILEATTACHMENT{name="jdm_p13_auto_115.jpg" attr="" comment="JDM Auto P13 ECU" date="1158685173" path="jdm_p13_auto_115.jpg" size="424867" user="carotman" version="1.1"}% %META:FILEATTACHMENT{name="jdm_p13_manual_300.jpg" attr="" comment="JDM Manual P13 ECU" date="1158685300" path="jdm_p13_manual_300.jpg" size="422194" user="carotman" version="1.1"}% %META:FILEATTACHMENT{name="P13-900.jpg" attr="" comment="JDM P13-900 Auto ECU" date="1158686634" path="P13-900.jpg" size="1048876" user="carotman" version="1.1"}% %META:FILEATTACHMENT{name="P13-900_injector.jpg" attr="" comment="JDM P13-900 Injector test Circuit" date="1158686728" path="P13-900_injector.jpg" size="1069955" user="carotman" version="1.1"}% %META:FILEATTACHMENT{name="P13-900_jumpers.jpg" attr="" comment="JDM P13-900 Auto Jumpers (RP11 and RP12)" date="1158686826" path="P13-900_jumpers.jpg" size="1064324" user="carotman" version="1.1"}%


 <<O>>  Difference Topic P13 (r1.14 - 26 Jan 2006 - Home.synoptic)
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Datalogging:

0043h - Interrupt Start Which jumps to either 004bh or 00dbh... When writing your datalogging code put your code at 000dbh as that's the main section that's called... or use the vector pointer at 0020h to specify a new interrupt location...

SRBUF: 07dh STBUF: 07ch

Checksum:

Disable checksum @ 0D22 909DF17F->03360D00

Memory Locations: Here's a few memory locations for use with Boost or 2-step code to get you all started...

0aeh is 16bit RPM 0179h and 0289h is 8bit RPM (For use with VTEC) 0a4h is the map sensor 0dfh is the VSS

Extra tidbits...

Map sensor check @ 1f57h for use with Boost

CEL Stuff @ 1a4bh for MIL Shiftlight

Rev limit set locations @ 157dh for 2-step

AC Stuff @ 1b4dh for AC Cut


 <<O>>  Difference Topic P13 (r1.13 - 07 Dec 2005 - Home.cybugluder)
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  • JDM P13 J50 UK 4 Plug Version:
    HondaP13J501UKJDM.jpg
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%META:FILEATTACHMENT{name="HondaP13J501UKJDM.jpg" attr="" comment="JDM P13 J50 UK 4 Plug Version" date="1133963399" path="G:\Cd422\Data\Honda Prelude ECU Info\P30 J00 and J50 Ecu\Honda P13 J50 1 UK JDM.jpg" size="340281" user="cybugluder" version="1.1"}%


 <<O>>  Difference Topic P13 (r1.12 - 22 Feb 2005 - Home.mind-eracer)
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021D.1 1 VTEC Active ??
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021D.1 1b VTEC Active ??
0224.0 1b A/C Switch Input If pin B5 (ACS) is grounded, 0x0224.0 will read 1

 <<O>>  Difference Topic P13 (r1.11 - 22 Feb 2005 - Home.mind-eracer)
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5407 2 Low Cam Rev Limit Set
540B 2 High Cam Rev Limit Reset
540F 2 High Cam Rev Limit Set
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5407 2 Low Cam Rev Limit Set OBD1_16bit RPM format
540B 2 High Cam Rev Limit Reset OBD1_16bit RPM format
540F 2 High Cam Rev Limit Set OBD1_16bit RPM format

 <<O>>  Difference Topic P13 (r1.10 - 22 Feb 2005 - Home.mind-eracer)
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00AE 2 Current RPM in 16bit form
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00AB 1 Tps Sensor OBD1_8bit TPS
00AE 2 RPM in 16bit form
00D9 1 ECT Sensor ??
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016C 2 Actual Rev Resume
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016C 2 Actual Rev Resume OBD1_16bit RPM
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021D.1 1 VTEC Active
0289 1 Current RPM in 8bit form  
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021D.1 1 VTEC Active ??
0289 1 RPM in 8bit form  

 <<O>>  Difference Topic P13 (r1.9 - 21 Feb 2005 - Home.mind-eracer)
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00A4 1 MAP sensor
00AE 2 Current RPM in 16bit form
00DF 1 VSS Sensor km/h
00ED 1 Column of table See ROM @6050 - mBar scale
00EE 1 Row of low cam table See ROM @6000 - low cam RPM scale
00EF 1 Row of high cam table See ROM @6028 - high cam RPM scale
0110 2 CEL Word #1 contains 0x0000 otherwise a bit depending on CEL
0111 2 CEL Word #2 contains 0x0000 otherwise a bit depending on CEL
0113 2 CEL Word #3 contains 0x0000 otherwise a bit depending on CEL
0114 2 CEL Word #4 contains 0x0000 otherwise a bit depending on CEL
016A 2 Actual Rev Cut OBD1_16bit RPM
016C 2 Actual Rev Resume
0179 1 Current RPM in 8bit form  
021D.1 1 VTEC Active
0289 1 Current RPM in 8bit form  
03D0 1 O2 sensor ???
03D2 1 IAT sensor 0v-5v 0x00-0xFF
03D3 1 Baro Sensor 0v-5v 0x00-0xFF
03DA 1 ECT sensor 0v-5v 0x00-0xFF
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0D22 4 Checksum Jump Instruction Change 909DF17F->03360D00 to disable checksum
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35CA 1 VTEC Coolant Temp Check (0x44 enables, 0xFF disables)
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605A 40 A scalar? Or Multiplier? 1x40 16bit format
6082 40 A scalar? Or Multiplier? 1x40 16bit format
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623A 110 Extra Table - no idea, simular to maps @6316 & 6384 10 col x 11 row
62A8 110 Extra Table - no idea, simular to maps @6316 & 6384 10 col x 11 row
6316 110 Extra Table - no idea, all 80s 10 col x 11 row
6384 110 Extra Table - no idea, all 80s 10 col x 11 row
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64C0 100 Extra Low Cam Ignition Table 10 col x 10 row
642E 100 Extra Low Cam Ignition Table 10 col x 10 row
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6664 100 Extra High Cam Ignition Table 10 col x 10 row
66D2 100 Extra High Cam Ignition Table 10 col x 10 row
681C 110 Extra Table - no idea, all 00s 10 col x 11 row
688A 120 Extra Table - no idea, all 00s 10 col x 12 row
7FF1 1 Debug/Test mode???? 0xFF enables, 0x00 disables???? here

 <<O>>  Difference Topic P13 (r1.8 - 18 Sep 2004 - Home.Artifex)
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%META:FILEATTACHMENT{name="p13-jdm.JPG" attr="" comment="JDM P13 ECU (thanks Sammy)" date="1095467995" path="p13-jdm.JPG" size="963984" user="Artifex" version="1.1"}%


 <<O>>  Difference Topic P13 (r1.7 - 24 Aug 2004 - Home.ddd)

 <<O>>  Difference Topic P13 (r1.6 - 26 May 2004 - Home.Artifex)
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%META:FILEATTACHMENT{name="P13.jdmus.check_1.jpg" attr="" comment="JDM vs. USDM p13 visual differences" date="1085585676" path="P13.jdm+us.check_1.jpg" size="243133" user="Artifex" version="1.1"}%


 <<O>>  Difference Topic P13 (r1.5 - 22 May 2004 - Home.Artifex)
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%META:FILEATTACHMENT{name="JDM-p13-resistors.jpg" attr="" comment="JDM p13 resistor area (thanks flyrod)" date="1085240663" path="JDM-p13-resistors.jpg" size="42442" user="Artifex" version="1.1"}% %META:FILEATTACHMENT{name="rpP13.jpg" attr="" comment="USDM (top) vs. JDM (bottom) resistor area (flyrod)" date="1085240838" path="rpP13.jpg" size="47821" user="Artifex" version="1.1"}%


 <<O>>  Difference Topic P13 (r1.4 - 30 Mar 2004 - Home.eg6ajk)
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%META:FILEATTACHMENT{name="P2210014.JPG" attr="" comment="" date="1080685404" path="C:\Documents and Settings\AJ\Desktop\p13jdm\P2210014.JPG" size="144657" user="eg6ajk" version="1.1"}% %META:FILEATTACHMENT{name="P2210023.JPG" attr="" comment="" date="1080685453" path="C:\Documents and Settings\AJ\Desktop\p13jdm\P2210023.JPG" size="747165" user="eg6ajk" version="1.1"}%


 <<O>>  Difference Topic P13 (r1.3 - 19 Mar 2004 - John Cui)
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2EAC 1 Speed Limiter 0-255km/h (0-159MPH) FF disables speed limiter
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2EAC 1 Speed Limiter 0-255km/h (0-159MPH) FF disables speed limiter
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6000 40 Low Cam Rev Scalar 1x40 Each scalar is in OBD1_16bit RPM format
6028 40 High Cam Rev Scalar 1x40 Each scalar is in OBD1_16bit RPM format
6050 10 Low and High Cam Map Scalar 1x10 [OBD1_8bitMBar]
60AA 200 Low Cam Fuel Table Unknown Conversion Formula
6172 200 High Cam Fuel Table Unknown Conversion Formula
63F8 200 Low Cam Ignition Table OBD1_8bit Advance
659C 200 High Cam Ignition Table OBD1_8bit Advance

 <<O>>  Difference Topic P13 (r1.2 - 04 Mar 2004 - Home.blundar)
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eprom check (Thanks Katman!):

scan

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%META:FILEATTACHMENT{name="P13_eprom_check.jpg" attr="" comment="Check for EPROM on P13 (thanks Katman)" date="1078360637" path="C:\Documents and Settings\Administrator\Desktop\temp\P13_eprom_check.jpg" size="107471" user="blundar" version="1.1"}%


 <<O>>  Difference Topic P13 (r1.1 - 03 Mar 2004 - Home.tungsten2k)
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%META:TOPICINFO{author="tungsten2k" date="1078314092" format="1.0" version="1.1"}% P13

93-95 OBD1 Prelude Vtec (H22A DOHC Vtec)

RAM

Location Bytes Description Notes

ROM

Location Bytes Description Notes
0C21 2 High Cam Rev Limit Reset Moved to memory here as well as the later entries
0C26 2 High Cam Rev Limit Set Moved to memory here as well as the later entries
5403 2 Low Cam Rev Limit Reset OBD1_16bit RPM format
5407 2 Low Cam Rev Limit Set
540B 2 High Cam Rev Limit Reset
540F 2 High Cam Rev Limit Set
2EAC 1 Speed Limiter 0-255km/h (0-159MPH) FF disables speed limiter

eprom check (Thanks Katman!):

scan


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Revision r1.1 - 03 Mar 2004 - 11:41 GMT - Home.tungsten2k
Revision r1.15 - 19 Sep 2006 - 17:13 GMT - Home.carotman 		%WEBCOPYRIGHT%