On Fri, Mar 30, 2018 at 12:14 PM, Eric Smith via cctalk <[email protected]> wrote: > On Fri, Mar 30, 2018 at 1:08 PM, Glen Slick via cctalk < > [email protected]> wrote: > >> Are there any hardware differences between the M7516 non-turbo and the >> M7516-YM turbo versions of the DELQA, or only firmware differences? >> Can you convert a non-turbo version into a turbo version just be >> replacing the firmware EPROM? >> > > The non-turbo I've seen use an AMD Lance ethernet chip (Am7990), while the > turbo I've seen use a DEC chip in its place. Could be important, or could > be coincidence.
I just took another look at the two M3127 DESQA I have handy. The M3127-PA Rev B02 with 23-334E5 / 23-335E5 firmware EPROMs and the M3127-PA Rev D03 with 23-365E5 / 23-366E5 firmware EPROMs both have AM7990DC/80 chips, with DEC 21-21672-09 part numbers. (The main obvious difference between the B02 and D03 revisions is header block jumpers vs push-button switch transceiver selection). Found this thread on the subject from back in 2011. Doesn't seem to include actual results of attempting a firmware only swap. http://www.vcfed.org/forum/showthread.php?27062-DELQA-vs-DELQA-YM-(Turbo)
