rocketfan Posted March 13, 2021 Share Posted March 13, 2021 (edited) For use at your own risk and if you want to void your warranty, here attached is a FW update which will increase your AFBX clock rate from 816Mhz to 1.2Ghz. Note- this update does not do anything else. It is only a "resource" partition which essentially includes just the Linux device tree. I did not feel confident to build a whole new FW with it. So, you will need to apply it on top of a known good custom firmware. You can "undo" it by applying a known good custom or stock Firmware. I have used it for about 1 hour and it seems to be working fine, including when ruuning with no flash drive installed. It is now at the same rate as the LFB2018 I have used for a long time. Thanks as usual to Draxxon who gave me the various files that helped me figure out where the change was done in the older FW. I have to admire the person who first figured out how to do this! In the next few days I plan to experiment with an improvement. I learned along the way that this Linux supports the ability to change the "operating performance point" somewhat dynamically. It's just that the AFBX has been set to only have a single valid OPP. At first it was hard-wired 816Mhz, and with this it is 1.2Ghz. It may (should?) be possible to have three OPPs available 816, 1200, and one notch higher yet. Then if anyone wants to push the limit, or better yet measure the CPU temp at the different settings, they could easily do that. One bit of bad news. Although the Stella 6.1 core is operating a LOT faster, I went back to compare and really the original core is still faster yet. Also for some reason my Battlezone sprite is still missing on the AFBX (but not on the LFB?), so the problems with newer Stella are not gone yet. If anyone wants to be a brave soul and try it, please let me know how it goes. A good comparison is the game "pulstar.zim" which is not quite acceptable the old clock rate, but runs flawless at the new rate. (BTW, I think that is a 2-button game for power ups). I bet r-type is going to run fine now also... Oh yeah, to apply it, place the file at the root of your flash drive on a system that can already play games off the flash drive. Boot up and follow the instructions to let it apply and wait patiently while it applies! atari_update.img Edited March 13, 2021 by rocketfan 2 Quote Link to comment Share on other sites More sharing options...
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