PC-Engineer wrote on 2021-10-14, 04:53:
The SV2GX4 doesn‘t support L1WB correct with POD. That means in this case that applications with DMA (Floppy, SCSI, Sound) cause memory incoherencies and errors. With L1WT there are no problems with DMA. With revision 1.8 and earlier the L1WB mode for POD is hard wired and you cannot switch to L1WT like with rev. 2.0 and 2.1.
Got it, for thoroughness, I’ve got the 2.1 board and setting L1 to WT, in the bios, prevents the system hang but produces static during the Duke3D sound test. Only disabling L1 cache, with the POD, seems to work in my case. No issues with the 5x86.
Also no audio issues with Quake or Daggerfall with the POD in WB, kind of interesting.
I’ll try again with WT set via jumpers.
*Update - selecting WT on jumper 21, position 2-3, resolves my sound issues in Duke, thanks for the heads up! I could see myself adding an external toggle for this when I case it.