If one replaced the 1397 w/ a 1398 on the Compac F would your driver for CGminer work?
They appear pin compatible. Or are the comms too different?
I highly doubt a simple 'drop-in' replacement is possible. Looking at older chips data sheets it is obvious that Bitmain plays around with different timing specs for the internal circuits - none of them are the same. Since BM no longer releases the data sheets Sidehack had to manually debug the signals/commands and timing for the 1397 and then supplied that info to Kano to work into the driver.
Hey NotfuzzyWarm,
Long time no talk, the old, now defunct, PlanetCrypto here (forgot password & lost email account when we shut it down 5+ years ago).
Kinda' assumed there was a LOT of reverse engineering going on between the 2.
And likely only those 2, outta' the community, coulda' figured it out, given BM's tight lipped agenda & complete absence of documentation. (They don't even teach theory of operation to their repair techs in their school).
Currently running some 17's & 19's, have a hot air rework station & test gear to fix'em when they break & have a small inventory of BIN 1 1397's & 1398's (& have a source for more). Mostly retired & was looking for a winter project to play w/ on these long cold MN nights. Upgrading an F seemed like a nice challenge. I know w/ esoteric cooling the 1397's can be pushed to 900+ Mhz w/ CoreV tweaks. The 1398's w/ the same heat dissipation & tweaks, in theory, should be able to exceed 1TH/s each.
Back in the day, we did some prototyping w/ 2 phase immersion cooling w/ Novec engineered fluids. So was thinking 'bout building some small immersion tanks to handle the heat. Like we did w/ S3 boards:
https://www.youtube.com/watch?v=fStHV_Q-x7sAnyway, thanks for the response & be safe out there.
Pup