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27C256 29 Apr 2004 - 02:54 - r1.2 Home.rschoener
The 27C256 is the basic EPROM commonly used to chip ECUs. It is a 32k byte (256kbit) chip. 27C256 chips are generally either OTP or UV-Erase . Beware tho! Most honda ...  
28C256 12 Apr 2004 - 20:42 - NEW Home.tungsten2k
28C256 EEPROM s will work in ECUs, but require pins to be moved around/altered due to them being a different pinout than either 27C256 or 29C256 chips. http://rocky ...  
29C010 18 Nov 2006 - 17:46 - NEW Home.longbow
The http://www.atmel.com ATMEL AT29C010 chip is a FLASH ROM chip with 1Mbit(~128kb) of memory. It can be found in old Pentium I II computer motherbords. This chip ...  
82C55 01 Aug 2005 - 14:37 - r1.3 Home.blundar
The 82C55 is an IO controller chip used in many OBD1 ECUs. Fortunately, almost all OBD1CivicIntegraECUs share a common pattern for what is controlled by the 82C55 ...  
A5 05 Mar 2004 - 19:37 - NEW Home.blundar
A5h (opcode 'A5' in hexidecimal) is the "reserved" opcode of the 8051 instruction set. This means it is NOT a valid instruction to a pure 8051 microcontroller. In ...  
AdjustPR4PaSensor 22 Sep 2005 - 21:14 - r1.2 Home.warrick
Dave Blundell sez "Vernon (deluded) sent me much of this info." As a rule of thumb, 90 PR4s have external PA sensors, and 91 ECUs have internal PA sensors. You can ...  
BegginersFAQ 27 Feb 2007 - 18:13 - r1.2 Home.sanimalp
(blundar sez: most of these were moved over from the old FAQ) If you are a beginner, and you have a question that you think other people will have too, please add ...  
ChippingAn88-89ECU 21 Sep 2005 - 08:24 - r1.8 Home.1net
OBD0MPFI ECUs have two main designs that affect how the ECU is chipped. 90-91 ECU s have an external 38256 (same as 27C256 ) ROM . This can be removed and replaced ...  
EcuChippingWirelist 22 Nov 2005 - 23:59 - r1.4 Home.markolson
This topic is intended to help you debug soldering problems when chipping an ECU. The first section is generic advice for debuggiing all ECUs. The remaining sections ...  
EcuDefinitionCodes 02 Apr 2007 - 17:06 - r1.84 Home.hackish
Honda ECU definition codes These id codes are the last 3 digits printed directly on the MCU after the model number (e.g. M66207-251 the "251" portion will be a much ...  
HiResP72 17 Feb 2004 - 09:26 - NEW Home.tungsten2k
HiResP72 is a custom P72 based ROM that has been modified to have the same size fuel and ignition lookup tables as used in the P28 so that tables can be copied/pasted ...  
Intel8051 23 Jul 2004 - 04:44 - r1.4 Home.blundar
for all you could want to know and a great tutorial, go to http://www.8052.com Any 8051 assembler will work fine for coding. Sysrad51, available http://www.systronix ...  
KurtsOBD0-OBD1 19 Feb 2004 - 22:01 - NEW TWiki Guest
First attempt to post this OBD1 conversion write-up on wiki.pgmfi.org. Some sections need revision still and they are in italics/bold print. Please send any suggestions ...  
LabelDecode 19 Sep 2004 - 19:21 - r1.3 Home.blundar
You can find out a lot from reading the label on a OBD1 ECU. This applies mainly to the Civic ECUs... dunno bount the integra ones. 37820-ABC-XYZ Digits Meaning ABC ...  
LegoZoo 19 Feb 2004 - 22:01 - NEW TWiki Guest
I try to be cool... http://home.insightbb.com/~legoz81 LegoZ81@a5.com LegoZ81 on the site go grab mIRC get on EFNet and /j #pgmfi.org !!! I will be hosting files there ...  
Oki6260A 02 Mar 2005 - 13:31 - r1.5 Home.l3st4rd
The Oki 6260A was manufactured for Honda by Oki. J. Wong has this to say: "I was just cleaning out my cube and just happened to run across a piece of paper with 6260A ...  
Oki80C154 20 Feb 2004 - 00:37 - NEW Home.blundar
MCU used in OBD0MPFI ECUs that has zero internal code memory. requires the use of an external EPROM It is mostly 8051 compatible, and features a third timer like ...  
Oki83C154 05 Mar 2004 - 17:44 - r1.2 Home.blundar
MCU used in OBD0MPFI ECU s that has 16k on-chip code memory. Usually copy protected, but there are McuReaders. It is mostly 8051 compatible, and features a third ...  
P0A 18 May 2006 - 18:59 - r1.3 Home.kabuki
P0A 94-95 OBD1 Accord EX attached pic is a 94 P0A-A51 PCB is IPT 02D010B0-1502 The data below has been copied over from the P13 page as a place holder. Only a few ...  
P30 23 Mar 2007 - 11:36 - r1.27 Home.johncui
P30 (Rom #203) P30-G01 95 Uk Civic Vti Hatch, Big case one. Uses CPU's internal rom, but has space for external rom. Ran code from rom above OK but needed knock sensor ...  
PT3 25 Mar 2006 - 19:57 - r1.3 Home.acclude
PT3 90-93 OBD1 USDM Accord SOHC non-vtec F22A1 This ECU shares the shares the same PC board with the EDM PT5 Accord ECU (02D01190-1504) Scan: http://pgmfi.org/resources ...  
PgmfiD51 05 Mar 2004 - 19:46 - NEW Home.blundar
blundar modified a dasm he found, D51, to support the A5 instruction as is peculiar on the Oki 8XC154 MCUs. Blundar made linux binaries. Chris D make windows binaries ...  
PreludeAccord 16 May 2005 - 14:26 - r1.2 Home.sloopy
OK, here is what I know about these ECUs. The PT6-A51 I have here has a 66911 MCU and uses an external 256k PROM. I got an ECU out of a 1994 Prelude SI with a 1.6 ...  

Number of topics: 23

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