Inside the Husqvarna 555

[SawTroll]

Firmware is an expression I haven't seen or heard before. :msp_unsure:

 

[mweba]

Firmware is an expression I haven't seen or heard before. :msp_unsure:

Firmware is an operating system that is built in and usually can not be changed. What I meant by that is, I'm unsure if the rev boost is controlled by the software in the carb or the firmware in the ignition itself.




PS Brad is the computer techy. He may be able to explain all this mumbo jumbo a bit better. Maybe he could even do some writing for us

 

[Zombiechopper]

Niko,

Firmware is like the operating system of a computer. It is the term used for the software that runs a device. Cameras, Blueray players, and other modern gadgets sometimes receive 'Firmware' updates from the manufacturer to fix bugs, or even to add or change features. I have a camera that has had firmware updates to increase focus speed, change button programming and tweak other things.

From Wikipedia (so you KNOW its accurate
In electronic systems and computing, firmware is the combination of read-only memory and program code and data stored in it.[1] Typical examples of devices containing firmware are embedded systems, computers, computer peripherals, mobile phones, and digital cameras. The firmware contained in these devices provides the control program for the device. Firmware is held in non-volatile memory devices such as ROM, EPROM, or flash memory. Changing the firmware of a device may rarely or never be done during its economic lifetime; some firmware memory devices are permanently installed and cannot be changed after manufacture. Common reasons for updating firmware include fixing bugs or adding features to the device. This may require physically changing ROM integrated circuits, or reprogramming flash memory with a special procedure. Firmware such as the ROM BIOS of a personal computer may contain only elementary basic functions of a device and may only provide services to higher-level software. Firmware such as the program of an embedded system may be the only program that will run on the system and provide all of its functions.
Before integrated circuits, other firmware devices included a discrete semiconductor diode matrix. The Apollo guidance computer had firmware consisting of an especially manufactured core memory plane.

 

[Zombiechopper]

does the Husky computer control ignition timing or just fuel mixture?

I have not read up on this, but I was under the impression that the Stihl system only controlled mixture

 

[mweba]

does the Husky computer control ignition timing or just fuel mixture?

I have not read up on this, but I was under the impression that the Stihl system only controlled mixture

This is a good question. I doubt that we will ever know for certain unless an engineer chimes in.

 

[CTYank]

Niko,

Firmware is like the operating system of a computer. It is the term used for the software that runs a device. Cameras, Blueray players, and other modern gadgets sometimes receive 'Firmware' updates from the manufacturer to fix bugs, or even to add or change features. I have a camera that has had firmware updates to increase focus speed, change button programming and tweak other things.

From Wikipedia (so you KNOW its accurate
In electronic systems and computing, firmware is the combination of read-only memory and program code and data stored in it.[1] Typical examples of devices containing firmware are embedded systems, computers, computer peripherals, mobile phones, and digital cameras. The firmware contained in these devices provides the control program for the device. Firmware is held in non-volatile memory devices such as ROM, EPROM, or flash memory. Changing the firmware of a device may rarely or never be done during its economic lifetime; some firmware memory devices are permanently installed and cannot be changed after manufacture. Common reasons for updating firmware include fixing bugs or adding features to the device. This may require physically changing ROM integrated circuits, or reprogramming flash memory with a special procedure. Firmware such as the ROM BIOS of a personal computer may contain only elementary basic functions of a device and may only provide services to higher-level software. Firmware such as the program of an embedded system may be the only program that will run on the system and provide all of its functions.
Before integrated circuits, other firmware devices included a discrete semiconductor diode matrix. The Apollo guidance computer had firmware consisting of an especially manufactured core memory plane.

Not really. Firmware is storage of information (code/data) in non-volatile fashion, like ROM or EPROM. Nowadays, generally, the only OS-related storage there is stuff like POST (power-on self test.) Most modern OSs obtain nothing from ROM for their runtime use. Firmware storage is better protected against shocks than discs, but much more difficult to update. Firmware was used at runtime for DOS, which is not really an OS.

 

[SawTroll]

Firmware is an operating system that is built in and usually can not be changed. What I meant by that is, I'm unsure if the rev boost is controlled by the software in the carb or the firmware in the ignition itself.


.....

Well, so am I, and thanks!

 

[Zombiechopper]

Not really. Firmware is storage of information (code/data) in non-volatile fashion, like ROM or EPROM. Nowadays, generally, the only OS-related storage there is stuff like POST (power-on self test.) Most modern OSs obtain nothing from ROM for their runtime use. Firmware storage is better protected against shocks than discs, but much more difficult to update. Firmware was used at runtime for DOS, which is not really an OS.

I was just trying to explain it to an old man in Norway the best I could. No need need to get nitpicky J/K

 

[Zombiechopper]

My theory:

Rev boost is computer controlled ignition advance. All models in question are capable of it in terms of hardware, but firmware/software/programming is what determines if it is enabled.

 

[mweba]

My theory:

Rev boost is computer controlled ignition advance. All models in question are capable of it in terms of hardware, but firmware/software/programming is what determines if it is enabled.

Agreed but it just as easily be controlled by fuel mixture. Off idle the system could allow for a certain period of lean high side tune. This in turn would account for extra rpms. Either way, without a strict definition from the developer, we may never know.

What ever their means to meet the goal, it works very well

 

[SawTroll]

My theory:

Rev boost is computer controlled ignition advance. All models in question are capable of it in terms of hardware, but firmware/software/programming is what determines if it is enabled.

I wouldn't be surpriced if you are right! :smile2:

 

[Bluefish]

Don't be callin' Niko old... Russ

 

[TK]

Don't be callin' Niko old... Russ

But.... He is??? Right???

 

[Zombiechopper]

fuel injection next please

 

[Zombiechopper]

But.... He is??? Right???

haven't you seen his picture in his avatar? I call em as I see em

 

[mweba]

fuel injection next please

tdi?:d

 

[Zombiechopper]

tdi?:d

:hmm3grin2orange:

you know, my Bro has a 50cc 18Hp 2 stroke scooter

Why can't we have a 7 pound, 50cc 7Hp saw?

I refuse to get excited about carbs with wires hanging out. Not good enough. We can put a man on the moon. I want my pretend saw built.

 

[TK]

I refuse to get excited about carbs with wires hanging out. Not good enough. We can put a man on the moon. I want my pretend saw built.

Wireless fuel injection? Lol sounds like even more wires to me!

 

[Kostas]

:hmm3grin2orange:

you know, my Bro has a 50cc 18Hp 2 stroke scooter

Why can't we have a 7 pound, 50cc 7Hp saw?

I refuse to get excited about carbs with wires hanging out. Not good enough. We can put a man on the moon. I want my pretend saw built.

What is the brand of that scooter?

 

[Zombiechopper]

What is the brand of that scooter?

I actually have no idea - it was some Euro brand I had never heard of. I helped him work on it years ago when he bought it. We installed a big bore kit and a new pipe that was supposed to make 18Hp. I've never even ridden the thing but max speed went from 50 Km/h to over 100 Km/h. There was a guy from a scooter race club that sourced the parts.