> > Paul,
> >
> > Could you detail exactly what you want MS to do?
> If
> > that's clear, then a hardware/software config
can
> be
> > specified to meet those needs:
> >
> > Fuel Side:
> > # and type of injectors (low/high impedance)
> > Primary/secondary staging, or batch fire all
four?
> >
> > Ignition Side:
> > Stock 2nd gen ignition? If not, what
coil/ignitor
> > type is to be used?
> > Leading/trailing timing split needed?
> >
> > Sensors:
> > - Stock Mazda manifold air temp and coolant temp
> > thermistors? If not, what type?
> > - Stock CAS(Crank Angle Sensor), or custom
> > wheel/sensor? If custom, spec sensor type.
> > - TPS is optional, certainly not needed for
> testing
> > purposes. In MS world, it is used for accel
> > enrichment, and for triggering flood-clear mode.
> > Flood clear can be handled in other manners.
> Accel
> > enrichment can also be provided using map signal
> > (rate-of-change of map, rather than
rate-of-change
> > of
> > tps), which eliminates the need for TPS.
> >
> > There are daughterboards being used by some
rotary
> > guys to give a true 'plug-n-play' setup for use
in
> > 2nd
> > gen cars. Given your application, this can be
> > avoided
> > completely.
> >
> > If your spec is open, here's what I'd suggest:
> >
> > Run stock high impedance injectors, or low
> impedance
> > with the stock resistor pack. This eliminates
the
> > need for the extra flyback circuitry you may
read
> > about.
> >
> > Use a stock 2nd gen CAS, remove the upper
2-tooth
> > wheel and its VR sensor, and grind opposing
teeth
> > off
> > the lower 24-tooth wheel.
> >
> > Buy an MS1 V3.0 based. MS1 indicates the HC908
> > processor, while V3.0 indicates board revision.
> The
> > V3.0 board has a number of improvements, one of
> > which
> > is the integral VR (variable reluctance) sensor
> > conditioning circuit. This circuit will
condition
> > the
> > noisy AC signal coming VR sensor in the CAS,
> > providing
> > a clean 0-5V signal from the modified CAS wheel.
> > Here's links to a couple reputable kit vendors.
> > Hopefully Yahoo doesn't mangle the links:
> >
>
http://www.glensgarage.com/catalog/product_info.php?cPath=1&products_id=30
> >
>
http://www.diyautotune.com/catalog/megasquirti-programmable-system-pcb30-unassembled-p-46.html
> >
> > Use stock 2nd gen leading and trailing coilpacks
> for
> > ignition.
> >
> > Once ready to run, drop me a line, or follow the
> > links
> > from msefi.com for the latest stable release of
> > msnsextra code. This includes support for all
the
> > features discussed above.
> >
> > This will allow full ignition and fuel control,
> with
> > the minimum of fuss. Given your background,
> > soldering
> > up a DB37 harness and wiring a relay or two will
> be
> > trivial, but the relay board might make the job
a
> > bit
> > easier.
> >
> > Hope that helps a bit.
> > Roger.
> >
> >
> > All I need is something simple to work on the
> dyno.
> > Turbo charged 2nd gen engine. Ignition is not
> > mandatory as
> > I can lash something up that will fire both
plugs
> 20
> > dgrees
> > BTDC. I can go with the CAS or build an RX8
style
> > trigger wheel and pickup. I am using stock 2nd
gen
> > injectors.
> >
> > I ordered the bare boards from DIY.
> >
> > Is msnsextra code C or 68HC908 asm source?
> >
> > BTW I am thinking two of these could be used in
an
> > airplane
> > with a 37 pin plug on the instrument panel.
Unplug
> > one and
> > plug in the other as a preflight backup check.
> They
> > are cheap.
> >
> > Paul Lamar ...No rotor no motor.
>
> msnsextra is asm. Latest version, and source, is
> available in the zip file found here:
> http://megasquirt.sourceforge.net/extra/files/
>
> Stock 2nd gen injectors can be either high or low
> impedance depending on year, so you may want to
> check
> to see what you've got.
>
> Roger.
>
> Thanks for your help Roger.
> No problem with the injectors. I can figure it
> out. Thats what ohmmeters are for. I spent 20
years
> manufacturing electronic test equipment. I have
some
> injectors I probably need a few more.
>
> BTW where is the s record file for the extra
> version?
> Also where do I get the assembler. Is Motorola
> giving it out for free?
>
> Paul Lamar
The s-rec and compiler are all included in the zip
file at the previous link. The compiler is
command-line driven, and there is a batch file
'compile.bat' that includes the proper command line
switches.
Roger.
Thanks Roger. Exactly what I am used to.
msns-extra.ini <<<<< What does this file do?
The .ini file is used with MegaTune (MT), the PC-based
tuning/datalogging software. This file tells MT what
the memory map looks like in this specific embedded
code version, and contains the conversions from
internal units to engineering units. It also
documents the configuration of the run-time data
stream, as this varies with different embedded code
versions. As well, custom gauge configurations,
datalogging format, menu format, etc, are all
configurable via this .ini file.
msns-extra.s19 <<<<< so this is the S-record?
Yes. This is the program that is flashed to the
processor.
CASM08Z.EXE <<<<<<<<<<<< is this the assembler?
Yes, that's it. You can download the winide version
as well, but it sounds like you are no windows fan, so
CASM and a text editor is all you need.
I am on my Linux computer so I cannot execute it yet
until
I copy it over to my Windows computer.
CHOICE.COM <<<<<<<<<<<<<<< what does this one do?
No idea... it's likely some windows app that some
folks use for something... I've never used it.
908_GP32.08P <<<<<<<<<<<<<< This also appears to be
an s-record.
This is a system file used when re-flashing the cpu as
received from Motorola. MS guys normally never use
it, as the MS-supplied processors are pre-programmed
with a bootloader code that allows program updates via
serial port. No programmer hardware required.
Roger.
Thanks Roger.
Paul Lamar
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