DIY_EFI Digest Friday, March 3 2000 Volume 05 : Number 082 In this issue: Re: Multi-processor EFI Re: Multi-processor EFI Re: Multi-processor EFI See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: 3 Mar 2000 20:5:4 +1200 From: "Tom Parker" Subject: Re: Multi-processor EFI Bernd Felsche wrote: >If you look at the possibilities presented by high-speed >inter-processor busses and cheap packaging options such as SIMM, >then a scalable option, at least for the data-acquisition and driver >sections becomes attractive. I've heard that simm modules are not very secure and are prone to rattling loose. Not sure how much truth there is here. - -- Tom Parker - parkert@xxx.nz - http://www.geocities.com/MotorCity/Track/8381/ - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Fri, 3 Mar 100 17:01:12 +0800 (WST) From: Bernd Felsche Subject: Re: Multi-processor EFI Tom Parker writes: >Bernd Felsche wrote: >>If you look at the possibilities presented by high-speed >>inter-processor busses and cheap packaging options such as SIMM, >>then a scalable option, at least for the data-acquisition and driver >>sections becomes attractive. >I've heard that simm modules are not very secure and are prone to rattling >loose. >Not sure how much truth there is here. I suspect that once they are properly seated, they are just as likely to become unseated as a socketed chip - probably less because SIMMs are locked in by "pins" through the SIMM PCB at either end and held titled by clips to locate them onto the pins... The clips need to be moved about 1mm before the SIMM can be tilted and the pins disengage. Neverthelessm, I wouldn't put the engine controls on the engine or its subframe. There's just too much likelihood of mechanical failure due to vibration. Besides; hobbyists sometimes have to resort to"commercial"-grade components which won't survive for very long in the main engine compartment of most cars. Production-car engine management units tend to be either in the passenger compartment, or away from the main engine compartment in a massive (as in having substantial mass) box on a flexible frame. The only common exception I've heard of is the Bosch LH3, which sits atop the vane AFM in the engine compartment. Those units are especially "hardened" for that environment. - -- Real Name: Bernd Felsche Email: nospam.bernie@xxx.au http://www.perth.dialix.com.au/~bernie - Private HP - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Fri, 3 Mar 100 19:42:13 +0800 (WST) From: Bernd Felsche Subject: Re: Multi-processor EFI As a side note - I've just donloaded the data sheets for the Siemens (now Infineon) AUDO TC1775 It's the full 32-bit thing with everything you can imagine you'd ever want in an engine management system. I'm still looking through the instruction set for the one that pulls the drain plug on the kitchen sink... :-) Details at http://www.infineon.com/AUDO/ WARNING: Wear a crash helmet in case your brain explodes. Out of the league of hobbyists and those professionals designing systems for small production runs not requiring all the you-beaut blinkenlights. It pretty much represents the ceiling of current technology. It's officially escaping - um - being released this month. - -- Real Name: Bernd Felsche Email: nospam.bernie@xxx.au http://www.perth.dialix.com.au/~bernie - Private HP - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ End of DIY_EFI Digest V5 #82 **************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. A non-digest (direct mail) version of this list is also available; to subscribe to that instead, replace "diy_efi-digest" in the command above with "diy_efi".