Well amazing - I had not considered that sort of thing: wandering around with an ohmmeter tracking where the jumpers connect to...
Makes sense...
I am far stronger in software than hardware, but might be able to figure this out. ...especially the CS0, etc.
This board - the Micro Memory MM-6490 for the VME bus - was manufactured in about 1995 or so and was a heavy little beast for the day: 2GB! 8)
However, Micro Memory was bought out by Vmetro in 2007 - and then they were bought out a few years ago by Curtis-Wright of all people. So, I am looking for information on a VME board that is a couple of corporate acquisitions back.
But, on the other hand, there are usually a gaggle of Micro Memory VME boards available on eBay for pennies on the dollar - just how to use - that is the problem. With that many Micro Memory boards out there, one would think that someone knows the jumpers...
Business Kid: Question:: When the memory board is in the VME rack and powered up, should any LEDs light with it just sitting there? In particular, on a memory board like this, does the "VME" LED typically light up only when something is talking to the board across the bus - or will that be on all the time???? No LEDS light even during system reset - just three LEDS and not a power LED.
With the MM-6490 board in the rack, I cannot see any memory anywhere from the 68060 processor board with the low level 68KBug thing except for memory known to be on the processor board itself - SRAM etc 64MB and down.
I have stepped up in 16MB increments from low on-board memory to 2GB, but see nothing at all anywhere. I am fairly certain that the memory board is actually 2GB as a single page data sheet that I did find claims "memory up to 2GB" and all of the memory slots are filled and the serial number are sharpied in by the manufacturer as "2GB".
Does this indicate in your mind that the memory board is simply dead or do jumpers frequently exist on a memory board that will cause it not to respond?
Thoughts?
Regards,
Jack