you mean alpha... and your point?

Im just hesitant to work with Alpha stuff.
But I can easily wait till it goes stable to upgrade.

I've been DDing the firmware since March. I'm not even on the latest firmware as it's mostly to fix random things we'll never deal with and some communications issues I never see. The only thing they are really working on before the v1.0 release, which should be ready very soon, is fixing communications errors.

for example, here's the latest firmware updates:

Changes since 0.26
Increase range for map sampling.
Internal ReqFuel logic fixed for no. squirt / injectors etc.
Semi-seq didn't work correctly with cam speed trigger wheel or dual+missing.
Add config error for impossible sequential.
Merge in PW4X changes. (Allows code to generate larger pulsewidths for low-revving large engines.)
Allow up to 255% VE.
Fix many ini errors detected with Megatune parser.
SD card work. Initialises ok on three previously non-working cards. Tested ok on eight cards here.

This is excellent, then ill wait and go straight to ms3.


Thanks Scott.

If you really wanna push it, get the ms3X board as well and run seq fuel then redo your cop harness and run seq. spark as well.

I will absolutely. Full sequential fuel and spark is about the biggest reason I would upgrade my MS.

then go MS3, with the expander board it's crazy easy.

you pretty much select seq. fuel, tell it to output through the ms3x, and then simply connect the 4 injector outputs to your harness. done.

Do the tach inputs need to be modified or brought in through the expansion board?

Can the injectors be triggered through the main board?

Not if you don't want to and yes they can, but if you want sequential you want to use the drivers on the MS3X as you need 4 identical drivers.

You could use the V3 injector drivers to drive anything else PWM though like a WI valve or a 5th injector etc etc

Awesome.

Thanks a lot for the info.

you don't need the expansion board, it just makes life easy when you need 4 spark and fuel drivers.

for a while I was running just the ms3 cpu on my mainboard...all i had to do was lift off the MS-II and swap on the MS-III, flash and load my ms-II map.

When the MS3X was released, I modified my injector and cop harness to run full sequential out the ms3x board. the mainboard still has the tach and other circuits like the a/c, fan, clutch switch, etc.

Yeah with MSIII and MS3x all the V3 is required for is providing power. it's a bit of a waste really.

Though if you want to use the stuff it provides all the better.

yep. there's still a bunch in this that you don't need:

http://westfieldmx5.devocht.com/star...ents_empty.gif

That's pretty nuts ill admit.

pretty much everything on the left hand side of Brain's image isn't strictly required.

MS3 has it's own on-board USB communications, the LED's, well they're really not that useful. so that leaves power supply.

Madness.

Are they eventually going to consolidate everything? That's pretty ridiculous.

I doubt it, the license part of MegaSquirt is bought when you buy a mainboard.

uS contains it's own license.

At least that's how I understand it.

You're not losing out though, everything the V3 board offers can still be used (VR/Hall sensor inputs, 2 injector drivers, PWM Idle driver 1 high current ignition driver etc.

C1 is not needed IIRC.

That one has all the RPM inputs deleted, so you'd need some sort of external conditioner for the crank input. It's also missing the injector drivers, so it would not be suited for a buildup without the MS3X board.

A single consolidated board is likely to happen - and would add some of the improved circuits that have been talked about here plus some new ones you haven't seen. It would, however, probably be SMD-only.