Mazda RX-8 rom

merchgod · **Joined:** Wed Mar 29, 2006 10:38 pm **Posts:** 5336

Here's a rom from a Mazda RX-8. Apparently you can download them from Mazdas tech site which is where the dude that sent it to me got it. They are very similar to the Subaru roms and you can easily make out the fuel, timing and maf scaling tables. Not that it matters as there is no way to flash it, but I thought it might be interesting for some of you tech heads out there.

autoxwrx · **Joined:** Sun Dec 03, 2006 2:57 am **Posts:** 56

wow this is cool. I also have an rx8 and was wondering about being able to read it and flash it.

Freon · **Posted:** Fri Feb 23, 2007 9:13 pm

0x2023:
"Copr.DENSO2000S"

0x3B28:
"Copyright 1999 Hitachi,Ltd.Hitachi Vehicle Operating System for SH-2 Operating System, Product Version V2.1A 1999"

Same CPU, manufacturer, and software provider as the Subaru. Maybe someone can send Colby an ECU to work on if he's willing.

This is *precisely* the same as what is found in the 32bit Subarus.

I'm also pretty sure it is the same Renesas 7055 as found in the 2004 2.5L DBW Subaru models. Same stack location in memory, and I see references to some of the same registers which are CPU revision specific (thus it could not be a 7058, or non-Renesas SH-2, etc.)

05GarnetLGT · **Posted:** Sat Feb 24, 2007 12:08 am

according to trey cobb there are differences between them, so it isn't as clear cut as we think.

more complex flash passkeys or something?

Turbo_Mike · **Posted:** Mon Feb 26, 2007 5:12 pm

05GarnetLGT wrote:

according to trey cobb there are differences between them, so it isn't as clear cut as we think.

more complex flash passkeys or something?

Must be the "please dont do this before my AP comes out for them" complexity :wink:

autoxwrx · **Joined:** Sun Dec 03, 2006 2:57 am **Posts:** 56

here is some more interesting info on the rx8 rom from racing beat

http://www.racingbeat.com/PCM.htm

merchgod · **Joined:** Wed Mar 29, 2006 10:38 pm **Posts:** 5336

Sounds like there's not much power to be had. They said modifying timing made little to no difference on the dyno. They also had to remove the knock sensor and front o2 for their tune? :shock:

tayhadar1 · **Joined:** Tue Aug 15, 2006 8:43 pm **Posts:** 15

Yeah, figured they could get more out of that motor, but guess not.

autoxwrx · **Joined:** Sun Dec 03, 2006 2:57 am **Posts:** 56

this is what I was sad to see

"Mazda has already cut the mixture to maximum efficiency - it is so close to ideal there was nothing significant we could do the improve it. This was discouraging to discover, but common sense says Mazda tried very hard to optimize fuel mileage - and our findings confirmed this."

PhatBoyG · **Posted:** Tue Apr 24, 2007 11:58 am

What about the Mazdaspeed 3? Low production, but if it uses a similar/same ECU I'm sure there would be some gearheads that want to tweak the boy toy.

dorrington · **Joined:** Fri Apr 28, 2006 2:02 am **Posts:** 30

I could send him some mazda 3 ECU's...if he's willing to take a look at them of course...

Freon wrote:

0x2023:
"Copr.DENSO2000S"

0x3B28:
"Copyright 1999 Hitachi,Ltd.Hitachi Vehicle Operating System for SH-2 Operating System, Product Version V2.1A 1999"

Same CPU, manufacturer, and software provider as the Subaru. Maybe someone can send Colby an ECU to work on if he's willing.

This is *precisely* the same as what is found in the 32bit Subarus.

I'm also pretty sure it is the same Renesas 7055 as found in the 2004 2.5L DBW Subaru models. Same stack location in memory, and I see references to some of the same registers which are CPU revision specific (thus it could not be a 7058, or non-Renesas SH-2, etc.)

dorrington · **Joined:** Fri Apr 28, 2006 2:02 am **Posts:** 30

oh, and you can find the ROMS here:
http://www.mazdatechinfo.com/

vansickey · **Joined:** Fri Sep 14, 2007 6:13 pm **Posts:** 21

Freon wrote:

0x2023:
"Copr.DENSO2000S"

0x3B28:
"Copyright 1999 Hitachi,Ltd.Hitachi Vehicle Operating System for SH-2 Operating System, Product Version V2.1A 1999"

Same CPU, manufacturer, and software provider as the Subaru. Maybe someone can send Colby an ECU to work on if he's willing.

This is *precisely* the same as what is found in the 32bit Subarus.

I'm also pretty sure it is the same Renesas 7055 as found in the 2004 2.5L DBW Subaru models. Same stack location in memory, and I see references to some of the same registers which are CPU revision specific (thus it could not be a 7058, or non-Renesas SH-2, etc.)

Are there maps that can be generated and read with romraider with work, coaxing, and beer? I recently acquired an 8 and would like to start tuning it, but found the resources available are very limited and scarce, can anyone help, PLEASE? ALso, whatever I can do to help this happen, let me know...

merchgod · **Joined:** Wed Mar 29, 2006 10:38 pm **Posts:** 5336

vansickey wrote:

Are there maps that can be generated and read with romraider with work, coaxing, and beer? I recently acquired an 8 and would like to start tuning it, but found the resources available are very limited and scarce, can anyone help, PLEASE? ALso, whatever I can do to help this happen, let me know...

You won't be able to tune it unless there is software/hardware to flash the RX-8.

vansickey · **Joined:** Fri Sep 14, 2007 6:13 pm **Posts:** 21

merchgod wrote:

vansickey wrote:

Are there maps that can be generated and read with romraider with work, coaxing, and beer? I recently acquired an 8 and would like to start tuning it, but found the resources available are very limited and scarce, can anyone help, PLEASE? ALso, whatever I can do to help this happen, let me know...

You won't be able to tune it unless there is software/hardware to flash the RX-8.

no problem with that part... what about reading it and making sense of the hex?

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Mazda RX-8 rom

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